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Tectonic Evolution of the Meso-Tethys Ocean: Insights from Geochemistry and Geochronology of the Jurassic ophiolitic complex in the Asa area, central Tibet Int. Geol. Rev. (IF 3.657) Pub Date : 2021-01-14 Xiaowen Zeng; Ming Wang; Yunpeng Yu; Hang Li; Xianjin Zeng; Di Shen
ABSTRACT Although voluminous Jurassic ophiolites have been reported along the Bangong–Nujiang Suture Zone (BNSZ), the tectonic setting of ophiolites and the Jurassic evolution history of the Meso-Tethys Ocean remain mysterious. This study presents petrological, geochronological and geochemical data for newly discovered Jurassic ophiolitic complex in the Asa area, the Shiquanhe–Namco Ophiolite sub-belt
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The Balkan terranes: a missing link between the eastern and western segments of the Avalonian–Cadomian orogenic belt? Int. Geol. Rev. (IF 3.657) Pub Date : 2021-01-12 Jiří Žák; Martin Svojtka; Ianko Gerdjikov; Alexandre Kounov; Dian A. Vangelov
ABSTRACT The Alpine–Himalayan collision zone involves a number of crustal fragments that originated in the Neoproterozoic to Cambrian Avalonian–Cadomian belt of northern Gondwana. We use the detrital zircon U–Pb geochronology to examine four of these lithotectonic units, now exposed in the Balkans in Bulgaria and Serbia. The obtained age spectra suggest that the Diabase–Phyllitoid Complex (the maximum
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Altenberg–Teplice Caldera sourced Westphalian fall tuffs in the central and western Bohemian Carboniferous basins (eastern Variscan belt) Int. Geol. Rev. (IF 3.657) Pub Date : 2021-01-11 Filip Tomek; Stanislav Opluštil; Martin Svojtka; Václav Špillar; Vladislav Rapprich; Jitka Míková
ABSTRACT Timing of magmatic activity of the late-Variscan Altenberg–Teplice Caldera was rather vaguely constrained. In this paper, we present five new laser ablation inductively coupled plasma mass spectrometry (LA–ICP–MS) U–Pb zircon ages, which along with published data indicate ~13 Myr lifetime. Formation of the Altenberg–Teplice Caldera commenced with the emplacement of the pre-caldera pluton at
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A review of garnet deposits in western and southern Iran Int. Geol. Rev. (IF 3.657) Pub Date : 2021-01-11 Fatemeh Nouri; Robert J. Stern; Hossein Azizi
ABSTRACT Garnets show wide ranges of chemical compositions and are key minerals for reconstructing the thermodynamic evolution of metamorphic terranes. The properties of garnets – including Mohs hardness ~7, lack of cleavage, vitreous luster and multiple colors – also makes them useful as semi-gemstones. Garnets are widespread accessory minerals in igneous and metamorphic rocks of western and southern
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Cooling history of the Biella pluton and implication for Oligocene to Miocene tectonics of the Sesia-Lanzo Zone, Austroalpine, Western Alps Int. Geol. Rev. (IF 3.657) Pub Date : 2021-01-11 Davide Zanoni; Luca Corti; Manuel Roda
ABSTRACT We present new emplacement constrains for the Biella pluton within the eclogitic Sesia-Lanzo Zone, western Austroalpine domain. This zone, with the autochthon andesitic cover, is separated from the Southalpine Ivrea Zone by the western Periadriatic Line. Thermobarometry indicates 710 and 750°C, and 0.9 and 2.3 kbar for the final pluton emplacement that accomplished at depths between 3 and
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A geochemical and lithological correlation of lower Jurassic conglomerates in the area surrounding the Lake Baikal rift zone: an improved reconstruction of the region’s palaeogeographic and tectonic evolution Int. Geol. Rev. (IF 3.657) Pub Date : 2021-01-11 N.I. Akulov; A.I. Melnikov; S.I. Shtelmakh; V.V. Akulova; P.P. Hearn
ABSTRACT This paper describes a study of the lower Jurassic conglomerates in the region around Lake Baikal (Irkutsk and Chita Oblasts, Buryat Republic). The approach used in the study was the analysis of samples from well cores, outcrops, and mine workings. Lithological and geochemical analyses of the conglomerate’s matrices suggest that the conglomerates were deposited in a single early Jurassic river
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Mesozoic mafic dykes in the North China Craton: magmatic evolution and implications for gold mineralization Int. Geol. Rev. (IF 3.657) Pub Date : 2021-01-11 Chao Li; Lin Li; Sheng-Rong Li; M. Santosh; Jun-Feng Shen
ABSTRACT The North China Craton (NCC), which underwent multiple subduction and lithospheric destruction during the Mesozoic, is well known for hosting some of the world-class gold deposits. In many cases, Mesozoic mafic dykes are associated with the gold deposits, although there has been no systematic studies aimed to integrate the characteristics of these dykes in different regions of the NCC. Here
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Oblique continental collision and the formation of syn-collisional A-type granites: insights from the Early Jurassic Baoji granite suite in the Qinling orogenic belt, central China Int. Geol. Rev. (IF 3.657) Pub Date : 2021-01-07 Long Ren; Huaying Liang; Zhiwei Bao; Wenting Huang
ABSTRACT A-type granites are conventionally interpreted to be formed in late post-collisional or anorogenic settings. However, we firstly identified an Early Jurassic syn-collisional A-type granite suite in the Qinling orogenic belt: the Baoji granite suite. A comprehensive investigation into its mineralogical, petrological, geochronological, and geochemical characteristics can shed light on the genesis
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Tectonostratigraphy of the Mérida Massif reveals a new Cadomian suture zone exposure in Gondwana (SW Iberia) Int. Geol. Rev. (IF 3.657) Pub Date : 2021-01-06 Rubén Díez Fernández; Ricardo Arenas; Esther Rojo-Pérez; Sonia Sánchez Martínez; José Manuel Fuenlabrada
ABSTRACT Neoproterozoic and Palaeozoic rocks of the Mérida Massif (SW Iberia) have been grouped into tectonostratigraphic units. Each unit is separated from the rest ones by either crustal-scale thrusts and/or extensional detachments. The lowermost unit (Magdalena Gneisses; lower plate) has continental crust affinity, and rest below a mafic-ultramafic ensemble, referred to as the Mérida Ophiolite (suture
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Silurian post-orogenic volcanic rocks of the South Kunlun Belt, NW China: links to the Proto- to Paleo-Tethyan tectonic transition Int. Geol. Rev. (IF 3.657) Pub Date : 2021-01-04 Jing Chen; Bing-Zhang Wang; Bin Li; Fu-Cheng Yu
ABSTRACT Newly discovered early Palaeozoic intraplate volcanic rocks within the southern Kunlun Orogen provide an opportunity to examine the middle to late Silurian tectonic setting of this area. This study presents new whole-rock geochemical and zircon U–Pb geochronological and Lu–Hf isotope data for the Silurian volcanic rocks of the Wanbaogou area, South Kunlun Belt. These volcanic rocks are split
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Age and composition of Neoproterozoic diabase dykes in North Altyn Tagh, northwest China: implications for Rodinia break-up Int. Geol. Rev. (IF 3.657) Pub Date : 2020-12-31 Yanguang Li; Shuguang Song; Xiaoyong Yang; Zi-Fu Zhao; Jinlong Dong; Xiaofeng Gao; Michael T.D. Wingate; Chao Wang; Meng Li; Mengqi Jin
ABSTRACT Whether or not the Altyn Tagh terranes in northwest China were part of the Rodinia supercontinent is unclear due to the apparent absence of rift-related igneous rocks. We present U-Pb geochronology, mineral chemistry, whole-rock major and trace element and Sr-Nd isotope data for the Yapuqiasayi mafic dykes in the North Altyn Tagh. Zircon and baddeleyite from a mafic dyke sample yield indistinguishable
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Review of the polyorogenic Palaeozoic basement of the Argentinean North Patagonian Andes: age, correlations, tectonostratigraphic interpretation and geodynamic evolution Int. Geol. Rev. (IF 3.657) Pub Date : 2020-12-31 Samanta Serra-Varela; Nemesio Heredia; Raúl Giacosa; Joaquín García-Sansegundo; Pedro Farias
ABSTRACT The presence of metamorphic rocks along the North Patagonian Andes is well known. All these metamorphic rocks are intruded by plutonic igneous rocks of Devonian, Carboniferous and Permian ages. The geographic localization of these rocks in the same geological province led to a first approach to grouping them under the same lithostratigraphic unit (Colohuincul Complex). Later studies, based
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Jurassic-Lower Cretaceous siliceous rocks and black shales from allochthonous complexes of the Koryak-Western Kamchatka orogenic belt, East Asia Int. Geol. Rev. (IF 3.657) Pub Date : 2020-12-31 Nadezhda I. Filatova; Elena Konstantinovskaya; Valentina Vishnevskaya
ABSTRACT Composition, stratigraphic and structural position of Jurassic-Lower Cretaceous radiolarian-rich siliceous rocks and black shales are described within allochthonous lithotectonic complexes of the Koryak-Western Kamchatka orogenic belt of East Asia. Comparative lithological and stratigraphic analysis of sedimentary units exposed in imbricated tectonic slices over a distance of more than 1000
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Physical and chemical interactions between coeval magmas: a case study of mixing and mingling from the Urumieh plutonic complex, NW Iran Int. Geol. Rev. (IF 3.657) Pub Date : 2020-12-31 Amin Jafari; Ian S. Williams; Mohsen Moayyed; Susan Jamei
ABSTRACT Field observations, whole-rock geochemistry, mineral chemistry and zircon U-Pb dating results from microgranular mafic enclaves and their host syenite, Urumieh plutonic complex, NW Iran, show that the enclaves and host are coeval, genetically related and evolved by synchronous magma mixing–fractionation. Geochemically all belong to the shoshonitic series and probably originated from the same
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Why are there no Cu-porphyry deposits in Jurassic Sanandaj-Sirjan zone intrusions of Iran? Int. Geol. Rev. (IF 3.657) Pub Date : 2020-12-31 Alireza Zarasvandi; Mohsen Rezaei; Johann G. Raith; David R. Lentz
ABSTRACT Granitoid intrusions of Zagros orogenic and metallogenic belt were mainly emplaced during the Jurassic-Cretaceous and Upper Eocene – Pliocene along the Sanandaj-Sirjan Zone (SaSZ) and Urumieh-Dokhtar magmatic Arc (UDMA), respectively. The present work tried to answer the question of whether or not there are fundamental differences in magmatic systems of Mesozoic versus Cenozoic intrusions
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Volcanism from different eruption cycles during the Early Cretaceous in the Changling fault depression of the songliao basin, NE China, and their implications for timing of lithospheric thinning Int. Geol. Rev. (IF 3.657) Pub Date : 2020-12-31 Chaoyang Liu; Xuanlong Shan; Jian Yi; Xianjun Ren; Jiaoyan Han; Penghui Niu; Jian Xing
ABSTRACT Late Mesozoic lithospheric extension in NE China resulted in the development of a large extensional province and widespread formation of volcanic-sedimentary basins. The Songliao Basin is the largest one and contains voluminous volcanic rocks composing the majority of the basin fill. This study focuses on two adjacent eruption cycles, the Huoshiling Formation (K1h) and the first member of
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Triassic granitoids in the East Kunlun Orogenic Belt, Northwestern China: magmatic source and implications for geodynamic evolution Int. Geol. Rev. (IF 3.657) Pub Date : 2020-12-31 Zhi-He Xu; Wei Xin; Xiao-Dong Zhou; Qing-Lin Xu; Fu-Wen Li; Zhao-Jun Song
ABSTRACT Granitoids, an important part of the continental crust, are the direct and indelible evidence of the accretion and reworking process of the continental crust in different tectonic settings. Therefore, these early geodynamic mechanisms can be roughly reconstructed by analysing the geochemical characteristics of granitoids. In this study, the Permian–Triassic Granitoids widely distributed in
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Geochemical and geochronological constraints on the genesis of Pliocene post-collisional granite porphyry and shoshonite in Quanshuigou, western Kunlun Mountains, NW Qinghai–Tibet Plateau Int. Geol. Rev. (IF 3.657) Pub Date : 2020-12-30 Yajuan Yuan; Yun Zhong; Feng Guo; Bin Xia; Yuquan Zhang
ABSTRACT Post-collisional K-rich magmatic rocks of the Qinghai–Tibet Plateau provide important information for understanding the continental collision and uplift of this plateau during the Cenozoic. However, the source of these K-rich rocks is still debated, and limited investigations have been conducted in the western Kunlun Mountains (WKM) in the northwestern margin of the plateau. In this paper
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Oligocene-Early Miocene exhumation and shortening along the Anninghe fault in the southeastern Tibetan Plateau: insights from zircon and apatite (U-Th)/He thermochronology Int. Geol. Rev. (IF 3.657) Pub Date : 2020-12-30 Hu Wang; Kaijin Li; Yuntao Tian; Guihong Zhang
ABSTRACT The growth mechanisms of the southeastern Tibetan Plateau are debated between models of Oligocene shortening and lateral extrusion of coherent crustal blocks versus Late Miocene flow of low-viscosity lower crust. To test these models, we examine brittle deformation of the north-striking Anninghe fault, which has been acting as a left-lateral strike-slip fault since Late Miocene time, using
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Transition from oceanic subduction to continental collision in central Tibet: evidence from the Cretaceous magmatism in Qiangtang block Int. Geol. Rev. (IF 3.657) Pub Date : 2020-12-30 Haiyang He; Yalin Li; Zijie Ning; Chengshan Wang; Siqi Xiao; Wenjun Bi; Huanbao Zhang; Zhengqing Wang; Liang Chen
ABSTRACT The Mid-Late Mesozoic magmatic arc in southern Qiangtang block was associated with the long-lasting subduction of the Bangong-Nujiang Tethyan and the subsequent Lhasa-Qiangtang collision. The detailed processes associated with the transition from oceanic lithosphere subduction to lithosphere delamination remain unclear. This paper reports zircon U-Pb age, major and trace element and Sr-Nd
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Geochronology, geochemistry and zircon Hf isotope constraints on petrogenesis and tectonic setting of Early Permian volcanic rocks from Sonid Youqi area, Solonker Zone Int. Geol. Rev. (IF 3.657) Pub Date : 2020-12-29 Jianzhou Tang; Zhicheng Zhang; Bo Liu; Qi Wang; Cong Ding
ABSTRACT The mineral composition, whole-rock geochemistry, Sr–Nd isotopes, and in situ zircon U–Pb and Lu–Hf isotopes for mafic and intermediate-felsic volcanic rocks in the Sonid Youqi area were determined to unravel their petrogenesis and the Early Permian tectonic setting of the Solonker Zone, Central Asian Orogenic Belt. Zircon U–Pb ages suggested that these rocks formed in the Early Permian. The
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Subduction-related metasomatism in the lithospheric mantle beneath the Calatrava volcanic field (central Spain): constraints from lherzolite xenoliths of the Cerro Gordo volcano Int. Geol. Rev. (IF 3.657) Pub Date : 2020-12-29 Carlos Villaseca; Javier García Serrano; Cecilia Pérez-Soba
ABSTRACT Two types of lherzolite xenoliths appear in the Cerro Gordo maar from the Cenozoic Calatrava volcanic field. Hydrous lherzolites (group-1) show a major proportion of metasomatic amphibole (>5 modal%), whereas group-2 lherzolites have only accessory amounts or an absence of amphibole. Group-1 lherzolites show a higher LREE-Ba-Sr-Th content in whole-rock composition compared to group-2 lherzolites
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Records of latest Triassic, mid-Cretaceous and Cenozoic uplift/exhumation phases in the Istanbul zone revealed by apatite fission-track and (U-Th)/He thermochronology Int. Geol. Rev. (IF 3.657) Pub Date : 2020-12-29 Remziye Akdoğan; István Dunkl; Aral I. Okay; Xiumian Hu; Gültekin Topuz
ABSTRACT Apatite fission-track and (U-Th)/He ages from Carboniferous to Eocene siliciclastic rocks of the Istanbul Zone (NW Turkey) range from 220 to 46 Ma, and from 46 to 18 Ma, respectively. Apatite grains from the upper Cretaceous and Eocene volcaniclastic and siliciclastic formations yielded unreset fission-track ages (85 to 65 Ma), whereas the Lower Cretaceous siliciclastic rocks yielded both
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Paleoproterozoic to Cenozoic zircon U–Pb ages with Hf signatures from metamorphic rocks and granodiorite of Tokunoshima: constraints on the geotectonic subdivision of the Ryukyu island arc, Southwest Japan Int. Geol. Rev. (IF 3.657) Pub Date : 2020-12-27 Hiroshi Yamamoto; Kazuaki Okamoto; Sun-Lin Chung; Hao-Yang Lee; Yuji Mita; Shuro Ueda; Masaru Terabayashi
ABSTRACT LA-ICP-MS U–Pb and Hf isotope analysis was conducted on zircons from the metamorphic unit of Omo Formation and a granodorite body of Tokunoshima in the Amami Islands, Southwest Japan. Zircons from dioritic gneiss (S9, S46) and pelitic schist (S99) yielded Paleoproterozoic upper intercept and Early Jurassic lower intercept ages. The positive εHf(t) values of the Paleoproterozoic zircons (between
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Types, characteristics, distribution, and genesis of pockmarks in the South China Sea: insights from high-resolution multibeam bathymetric and multichannel seismic data Int. Geol. Rev. (IF 3.657) Pub Date : 2020-12-27 Song Zhu; Xuejie Li; Huodai Zhang; Zhibin Sha; Zhen Sun
ABSTRACT Ubiquitous pockmarks in continental margins are important to understand the tectonic and sedimentary history and flow activity of their host margins. The study of an extensive field of pockmarks in the South China Sea (SCS) is important both scientifically and economically, for the exploration of oil, gas, and gas hydrate resources and the prevention and control of marine geological disasters
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Geodynamic experiments suggest that mantle plume caused Late Permian Emeishan Large Igneous Province in Southern China Int. Geol. Rev. (IF 3.657) Pub Date : 2020-12-23 Oğuz H Göğüş
ABSTRACT Stratigraphic, petrological and geophysical studies suggest that the Late Permian (~ 260 Ma) Emeishan Large Igneous Province in southern China may be formed by mantle plume activity. However, the plume impingement hypothesis remains controversial since interpretations based on volcano-stratigraphic analyses around plume induced domal uplift/inner zone suggest that the volcanism occurred under
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Geochronology and geochemistry of Devonian magmatism in the Frontal cordillera (Argentina): geodynamic implications for the pre-Andean SW Gondwana margin Int. Geol. Rev. (IF 3.657) Pub Date : 2020-12-15 Juan A. Dahlquist; Matías M. Morales Cámera; Pablo H. Alasino; Hugo Tickyj; Miguel A.S. Basei; Carmen Galindo; Juan A. Moreno; Sebastián Rocher
ABSTRACT Whereas north of 33°S Devonian calcalkaline magmatism is notably absent, a Devonian arc is well developed to the south of 33°S. The Carrizalito, Pampa de los Avestruces, and Papagayos plutons are located in the Frontal Cordillera between 34° and 35°S. U-Pb zircon SHRIMP and LA-MC-ICP-MS data from the plutons yield Early Devonian ages of 389 ± 3 and 409 ± 3 for Carrizalito, 413 ± 2 Ma for Pampa
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Pacific-type transform and convergent margins: igneous rocks, geochemical contrasts and discriminant diagrams Int. Geol. Rev. (IF 3.657) Pub Date : 2020-12-09 Andrei V. Grebennikov; Alexander I. Khanchuk
ABSTRACT Transform margins represent lithospheric plate boundaries with horizontal sliding of the oceanic plate, which in time and space replaced the subduction-related convergent margins. This happened due to the following: ridge-crest–trench intersection or ridge death along a continental margin (recent California and Baja California, Queen Charlotte–Northern Cordilleran, west of the Antarctic Peninsula
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The Siah Cheshmeh-Khoy-Misho-Tabriz fault (NW Iran) is a cryptic neotethys suture: evidence from detrital zircon geochronology, Hf isotopes, and provenance analysis Int. Geol. Rev. (IF 3.657) Pub Date : 2020-12-09 Ali Mohammadi; Jean-Pierre Burg; Marcel Guillong
ABSTRACT Provenance analysis including sandstone modal compositions, heavy mineral assemblages, and LA-ICP-MS U-Pb dating with in-situ Hf isotopic compositions of detrital zircons defines two types of Late Cretaceous-Eocene turbiditic sequences separated by the Siah Cheshmeh-Khoy-Misho-Tabriz Fault in the Azerbaijan Province, Northwest Iran: (1) Volcaniclastic turbidites to the southwest and (2) terrigenous
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Fluid sources and precipitation mechanisms of Pb–Zn–(Cu) sulphide–sulphate in the Iheya North Knoll hydrothermal field, Okinawa Trough: insights from fluid inclusions, He and Ar isotopes Int. Geol. Rev. (IF 3.657) Pub Date : 2020-12-01 Zhifeng Yang; Shikui Zhai; Zenghui Yu; Xia Zhang; Jie Xu; Fei Su
ABSTRACT The Okinawa Trough is an extensive back-arc basin that was formed by the subduction of the Philippine Sea plate beneath the Eurasian continent. Instances of Zn–Pb–(Cu) mineralization, which are typically associated with volcanism, are commonly found in many of the hydrothermal fields throughout this trough. We analysed the fluid inclusions and helium isotopic compositions of samples collected
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Episodic Neoproterozoic extension-related magmatism in the Altyn Tagh, NW China: implications for extension and breakup processes of Rodinia supercontinent Int. Geol. Rev. (IF 3.657) Pub Date : 2020-11-26 Jiang-bo Hao; Chao Wang; Ji-heng Zhang; Liang Liu; Yong-sheng Gai; Hang Li; Zun-pu Yu; Joseph G Meert; Xiao-ping Long; Xiao-kui Sun; Shuai Zhang
(2020). Episodic Neoproterozoic extension-related magmatism in the Altyn Tagh, NW China: implications for extension and breakup processes of Rodinia supercontinent. International Geology Review. Ahead of Print.
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Neoproterozoic hybrid forearc – MOR ophiolite belts in the northern Arabian-Nubian Shield: no evidence for back-arc tectonic setting Int. Geol. Rev. (IF 3.657) Pub Date : 2020-11-20 Haytham Sehsah; Ahmed M. Eldosouky
ABSTRACT The Neoproterozoic Arabian-Nubian Shield (ANS) post-dates the Boring Billion (1.85−0.85 Ga), a transition dominated by extensive arc-magmatism, terrane accretion along active subduction zones. Understanding the nature of the oceanic crust fragments preserved in the ophiolite belts is essential in extrapolating the predominant style of plate tectonics during the Neoproterozoic Era. There are
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Discussion of “Crustal fluid contamination in the Bushveld Complex, South Africa: An analogue for subduction zone fluid migration by Benson, E., Connolly, J.A.D. and Boudreau, A.E. (2020). Int. Geol. Rev. (IF 3.657) Pub Date : 2020-11-18 Roger N. Scoon; Andrew A. Mitchell
ABSTRACT The principal thesis of the discussion, i.e. that the layered ultramafic-mafic component of the Bushveld Complex, or Rustenburg Layered Suite (RLS), has been subjected to at least some fluid contamination is unquestionable. The logic that it is specifically the Main Zone, i.e. the thickest component of the RLS which is located within the approximate centre of the intrusion where comparatively
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Subduction accretion, thermal overprinting, and exhumation of high-pressure/low-temperature metasedimentary rocks of the south-central brooks range Int. Geol. Rev. (IF 3.657) Pub Date : 2020-11-13 Tim M. O’Brien; M. Grove
ABSTRACT Lithological, petrological and structural observations and measurements of graphite thermometry, Si-in-phengite barometry, and 40Ar/39Ar phengite thermochronology were performed along two transects across the south-central Brooks Range of northern Alaska. The integrated data set reveals a history of accretion, protracted thermal overprinting of high-pressure/low-temperature (HP/LT) metamorphic
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Archean to paleoproterozoic crustal evolution in the Phan Si Pan zone, Northwest Vietnam: evidence from the U-Pb geochronology and Sr-Nd-Hf isotopic geochemistry Int. Geol. Rev. (IF 3.657) Pub Date : 2020-11-08 Pham Trung Hieu; Wang Xiao Lei; Pham Minh; Nguyen Thi Bich Thuy; Le Duc Phuc; Nguyen Dinh Luyen
ABSTRACT We studied zircon U-Pb geochronology, Sr-Nd-Hf isotopes, and whole-rock geochemistry of Mesoarchean-Paleoproterozoic igneous rocks in the Phan Si Pan zone, NW Vietnam. The Mesoarchean-Paleoproterozoic magmatism in the area can be divided into three phases as represented by ca. 2.9 Ga Mesoarchean tonalite-trondhjemite-granodiorites (TTGs), ca. 2.3 Ga Paleoproterozoic mafic dykes, and ca. 1
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U-Pb ages of detrital zircons in lower Palaeozoic quartzites of the Taebaeksan Basin, eastern Sino–Korean Block: sediment provenance response to relative sea-level changes Int. Geol. Rev. (IF 3.657) Pub Date : 2020-11-01 Changyoon Lee; Yi Kyun Kwon; Jung Min Yeo; Yoo Jin Kwon; Hyun-Chul Han
ABSTRACT The Cambrian–Ordovician Taebaeksan Basin overlies the Precambrian basement of the Sino–Korean Block (North China Craton) in the central–eastern Korean peninsula. This corresponds to the occurrence of the global marine transgression over the Great Unconformity in the Cambrian, which is widely recognized. However, the palaeogeography of the Sino–Korean Block during the Early Cambrian–Ordovician
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Late neoproterozoic P-T-t paths of syn- and post-collisional metamorphism in the Paranaguá Terrane, Ribeira Belt (Brazil): implications for West Gondwana assembly Int. Geol. Rev. (IF 3.657) Pub Date : 2020-11-01 D. Patias; L.F. Cury; F.M. Faleiros; M. Calderón; S. Siga Jr; T. Theye
ABSTRACT Phase diagram modelling and U-Pb monazite ages reveal a clockwise Pressure-Temperature-time metamorphic evolution in the Paranaguá Terrane (Ribeira Belt – SE Brazil) and characterized important tectonic events. Comparisons of our dataset with the Dom Feliciano and Kaoko belts indicate a contrasting metamorphic evolution of South American and African units during West Gondwana assembly. The
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Structural setting and fluid composition of gold mineralization along the central segment of the Keraf suture, Neoproterozoic Nubian Shield, Sudan: implications for the source of gold Int. Geol. Rev. (IF 3.657) Pub Date : 2020-11-01 Damien Gaboury; Hassan Nabil; Aomar Ennaciri; Lhou Maacha
ABSTRACT We provide the first large field investigation of more than 20 gold deposits and sites along the Keraf suture zone, covering an area of ~15,000 km2. The area shows diverse structural settings for gold mineralization in greenschist, amphibolite, and hornfels metamorphosed rocks. The reverse fault and dyke-hosted settings appear to be the most favourable for forming gold deposits. Two major
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Petrogenesis of the Late Triassic Mengsong strongly peraluminous granites in the southeastern Tibetan Plateau: highly fractionated from crystal mush Int. Geol. Rev. (IF 3.657) Pub Date : 2020-11-01 Feng Cong; Fu-Yuan Wu; Wen-Chang Li; De-Feng He; Zai-Bo Sun; Xiao-Ming Huang; Zhi-Zhong Hu; Han Zhao
ABSTRACT The Triassic Lincang granites make up the largest peraluminous granitic batholith in the Changning-Menglian Paleo-Tethys orogenic belt, southeastern Tibetan Plateau. It is undoubtedly very important to investigate the role of crustal magmatism in the evolution of the Changning-Menglian Paleo-Tethys orogenic belt. The Late Triassic Mengsong pluton is composed of strongly peraluminous two-mica
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The Peltetec ophiolitic belt (Ecuador): a window to the tectonic evolution of the Triassic margin of western Gondwana Int. Geol. Rev. (IF 3.657) Pub Date : 2020-10-28 F. Villares; A. Garcia-Casco; I. F. Blanco-Quintero; C. Montes; P. S. Reyes; A. Cardona
ABSTRACT New field and petrographic observations, whole-rock major- and trace-element geochemical data, Nd and Sr isotope systematics and U-Pb SHRIMP zircon ages of the Peltetec metaophiolite and related rocks (Ecuador) allow the characterization of the igneous and sedimentary protoliths and the evaluation of the geodynamic evolution of the active western margin of Gondwana during the Mesozoic. The
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Multiple intrusion stages and mantle sources of the Paleozoic Kuznetsk Alatau alkaline province, Southern Siberia: geochemistry and Permian U–Pb, Sm–Nd ages in the Goryachegorsk ijolite-foyaite intrusion Int. Geol. Rev. (IF 3.657) Pub Date : 2020-10-27 V. V. Vrublevskii; I. F. Gertner; G. Gutiérrez-Alonso; M. Hofmann; O. M. Grinev; A. A Mustafaev
ABSTRACT In this work, we present new U–Pb, Sm–Nd geochronology, major and trace‐element and isotopic composition (Nd, Sr, Pb, O) for the Goryachegorsk alkaline-mafic igneous rocks from the Kuznetsk Alatau (Siberia, Russian Federation). The age obtained using U-Pb in zircon, ~ 265 Ma, is considered to represent the crystallization age of Goryachegorsk intrusion in Late Permian times. LILE and HFSE
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Neoproterozoic tectonic switch on the southwestern Yangtze Block: evidence from zircon U-Pb-Hf isotopes and geochemistry of the A- and I-type granites Int. Geol. Rev. (IF 3.657) Pub Date : 2020-10-23 Ji-Biao Zhang; Xiao-Zhong Ding; Yan-Xue Liu
ABSTRACT The petrogenesis and tectonic affinity of late Mesoproterozoic to early Neoproterozoic magmatic records in the Yangtze Block is important to understand its tectonic evolution within the context of the Rodinia supercontinent’s reconstruction. In this paper, our new SHRIMP zircon U-Pb dating results demonstrate that the Luonie granodiorites and Gonghe granites were emplaced at 1019.2 ± 5.3 Ma
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Contrasting latest Permian intracontinental gabbro and Late Triassic arc gabbro–diorite in the Gangdese constrain the subduction initiation of the Neo-Tethys Int. Geol. Rev. (IF 3.657) Pub Date : 2020-10-23 Qiu-Huan Li; Kai-Jun Zhang; Li-Long Yan; Xin Jin
ABSTRACT When the Neo-Tethys subduction initiated has been a subject of debate, perhaps due to the lack of reliable evidence. This paper reports geochronological, geochemical, and Hf isotopic data for recently identified gabbro as well as diorite exposed in the Chanv area of the Gangdese in the southernmost margin of the western Lhasa block, western China. Zircon U–Pb dating indicates the Chanv magmatic
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The Mojiawan I-type granite of the Kangding Complex in the western Yangtze Block: new constraint on the Neoproterozoic magmatism and tectonic evolution of South China Int. Geol. Rev. (IF 3.657) Pub Date : 2020-10-21 Xiu-Wei Jiang; Hao Zou; Leon Bagas; Hai-Feng Chen; Hang Liu; Yang Li; Min Li; Die Li
ABSTRACT Studies of Neoproterozoic granites near the western margin of the Yangtze Block provide new evidence on the mechanism leading to the Neoproterozoic break-up of the Rodinia Supercontinent. This contribution focusses on the structural geology, geochemistry, zircon U-Pb geochronology, and Hf-O isotope systematics of the poorly documented Mojiawan Monzogranite in the Kangding Complex, which gives
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Reply to discussion of ‘Crustal fluid contamination in the Bushveld Complex, South Africa: an analogue for subduction zone fluid migration’ by Roger Scoon and Andrew Mitchell (2020) Int. Geol. Rev. (IF 3.657) Pub Date : 2020-10-19 Erin Benson; James A. D. Connolly; Alan E. Boudreau
ABSTRACT In their discussion of our recent publication, Scoon and Mitchell (2020 Scoon, R. , and Mitchell, A. , 2020, Discussion of “Crustal fluid contamination in the Bushveld Complex, South Africa: An analogue for subduction zone fluid migration “by Benson, E., Connolly, J.A.D. and Boudreau, A.E. (2020): International Geology Review.[Web of Science ®] , [Google Scholar]) put forward a number of arguments
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Meso‑Cenozoic lithospheric thermal structure and its significance in the evolution of the lithosphere in the Ordos Basin, WNCC, China Int. Geol. Rev. (IF 3.657) Pub Date : 2020-10-16 Kai Qi; Zhanli Ren; Junping Cui; Qiang Yu
ABSTRACT The Ordos Basin located in the Western North China Craton (WNCC) has been confirmed to have undergone large-scale lithospheric thinning at the end of the Early Cretaceous (130 ~ 90 Ma), but investigations involving its lithospheric thermal structure in the Mesozoic and Cenozoic are limited. In this study, we employed a 1D, steady-state, heat conduction equation to calculate mantle heat flow
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Review of the regional nomenclature and tectonic setting for mesozoic gold deposits in the Malanyu Anticline area of Eastern Hebei Province, North China Int. Geol. Rev. (IF 3.657) Pub Date : 2020-10-15 Leon Bagas; Frank Bierlein; Si-Hong Jiang; Yi-Fei Liu; Li-Li Zhang
ABSTRACT North China (NC) is a region recording a long and complex geological history spanning from the Archaean to Cenozoic. This included magmatism, sedimentation, metamorphism, and deformation, demonstrating that the region is not a craton. To date, few studies have considered the links between multiple deformation events, emplacement of granites, and the deposition of gold deposits during the Mesozoic
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Unravelling slab δ34S compositions from in-situ sulphide δ34S studies of high-pressure metamorphic rocks Int. Geol. Rev. (IF 3.657) Pub Date : 2020-10-13 Ji-Lei Li; Reiner Klemd; Gao-Feng Huang; Jay J. Ague; Jun Gao
ABSTRACT Sulphur is of particular importance in the subduction zone system, as it is thought to be intimately related to the arc redox state and metallogenesis above the slab. Knowing the sulphur isotope compositions of the subducted slab, and identifying the δ34S variations between the pre-subduction oceanic lithosphere and its high-pressure (HP) equivalents is of great importance for understanding
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Multiple mantle melting events for two overlapping ca. 2.21-2.18 Ga mafic dyke swarms in the Dharwar craton, India Int. Geol. Rev. (IF 3.657) Pub Date : 2020-10-07 Amiya K. Samal; Apratim K. Rai; Rajesh K. Srivastava
ABSTRACT Two distinct NW- to WNW-trending mafic dike swarms of the previously dated ca. 2.21 Ga Anantapur-Kunigal and ca. 2.18 Ga Mahbubnagar-Dandeli swarms, emplaced in the Dharwar craton, are studied in greater petrological detail. Petrography classifies these as dolerite, olivine-dolerite, and meta-dolerite. The bulk rock geochemistry of 39 new and 11 published samples of both dike swarms are compared
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Carbon, oxygen and strontium isotopes of the Mesoproterozoic Jixian System (1.6-1.4 Ga)in the southern margin of the North China Craton and the geological implications Int. Geol. Rev. (IF 3.657) Pub Date : 2020-10-06 Cong Tan; Yuanzheng Lu; Xin Li; Haonan Song; Dan Lv; Xueying Ma; Ru Fan; Shenghui Deng
ABSTRACT The Mesoproterozoic Jixian System (1.6–1.4 Ga) in the Luonan area, southern margin of the North China Craton (NCC), is characterized by complete development, continuous sedimentation and a low degree of structural deformation, resulting in well-preserved palaeontological and paleoenvironmental records. Carbon, oxygen and strontium isotopes of 382 dolostone samples from the Jixian System in
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Provenance of Middle Jurassic sequences in the Northern Qiangtang: implications for Mesozoic exhumation of the Central Tibetan Mountain Range Int. Geol. Rev. (IF 3.657) Pub Date : 2020-10-04 Jiawei Zhang; Yalin Li; Huiping Zhang; Xudong Zhao; Kang Liu; Qiangyu Shang
ABSTRACT The exhumation history of the Central Tibetan Mountain Range (CTMR) in the Qiangtang terrane is important for establishing the boundary conditions prior to the India-Asia collision. Previous studies suggest that the CTMR is a significant provenance for Jurassic sediments in the Qiangtang terrane. The Middle Jurassic sediments north of the CTMR provide crucial information to constrain the timing
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Formation of the giant Aynak copper deposit, Afghanistan: evidence from mineralogy, lithogeochemistry and sulphur isotopes Int. Geol. Rev. (IF 3.657) Pub Date : 2020-10-04 Hamidullah Waizy; Norman R. Moles; Martin P. Smith; Adrian J. Boyce
ABSTRACT Aynak is the largest known copper deposit in Afghanistan, with indicated resources of 240 Mt grading 2.3% Cu placing it in the ‘giant’ category. Host rocks are Neoproterozoic metasediments comprising dolomitic marble, carbonaceous quartz schist and quartz-biotite-dolomite schist containing garnet, scapolite and apatite. Chalcopyrite and bornite dominate the hypogene ore with lesser pyrite
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Late Silurian to early Devonian development of the Chingiz accretion arc, West Junggar: insights into accretion arc evolution in the Central Asia Orogenic Belt Int. Geol. Rev. (IF 3.657) Pub Date : 2020-09-29 Yichao Chen; Ji’En Zhang; Wenjiao Xiao; Renjie Zhou; Shuaihua Song; Zhiyong Zhang; Songjian Ao; Miao Sang; Qian W.L. Zhang; Rui Li; Zhen M.G. Li; Yin Liu; Hui C.G. Zhang; Jiahui Liu; Chunming Wu
ABSTRACT Early Palaeozoic evolution of the Kazakhstan orocline in the Central Asian Orogenic Belt (CAOB) is key to reconstructing the Palaeozoic tectonic framework in Central Asia. This study presents field mapping, geochemistry, and geochronological data from the Wulasitai area of northern West Junggar to constrain the subduction polarity and major tectonic events in the Chingiz arc of the Kazakhstan
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Petrogenesis of the peralkaline Dutsen Wai and Ropp complexes in the Nigerian younger granites: implications for crucial metal enrichments Int. Geol. Rev. (IF 3.657) Pub Date : 2020-09-29 Abdulgafar Kayode Amuda; Xiaoyong Yang; Jianghong Deng; Mohamed Faisal; Jinya Cao; Saleh Ibrahim Bute; Musa Bala Girei; Safiyanu Muhammad Elatikpo
ABSTRACT The Dutsen Wai and Ropp complexes are parts of the over 50 within-plate alkaline ring complexes in north-central Nigeria. These complexes consist mainly of A-type granites that were emplaced between 175 Ma (in Dutsen Wai) and 149 Ma (in Ropp). They are characterized by moderately negative zircon ԑHf(t) values (–9.8 to – 5.86) with Paleoproterozoic (1597–1884 Ma) crustal model ages (TDMc),
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Late Cadomian rifting of the NW Gondwana margin and the reworking of Precambrian crust – evidence from bimodal magmatism in the early Paleozoic Moroccan Meseta Int. Geol. Rev. (IF 3.657) Pub Date : 2020-09-27 Muhammad Ouabid; Carlos J. Garrido; Houssa Ouali; Jason Harvey; Károly Hidas; Claudio Marchesi; Antonio Acosta-Vigil; Jean-Marie Dautria; Hicham El Messbahi; Manuel J. Román-Alpiste
ABSTRACT The Meseta Goaïda magmatism, which occurs as gabbro, dolerite and rhyolitic intrusions in the Neoproterozoic basement and Cambrian platform sedimentary series of the Moroccan Hercynian orogen, has been ascribed to the Variscan orogenesis in the late Palaeozoic. Here, we provide new LA–ICP-MS U-Pb zircon ages – ranging from c. 519 Ma to c. 479 Ma – of this magmatism that reveal, for the first
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Applying Popperian falsifiability to geodynamic hypotheses: empirical testing of the episodic crustal/zircon production hypothesis and selective preservation hypothesis Int. Geol. Rev. (IF 3.657) Pub Date : 2020-09-25 Stephen J. Puetz; Kent C. Condie
Even though Earth scientists widely recognize the episodic distribution of zircon ages, the cause of the episodes remains unresolved. Two competing explanations have emerged. Some interpret zircon age peaks as pulses of continental crust production, whereas others suspect production remains relatively constant with the episodes caused by variable preservation potential. However, in their current forms
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Late Palaeozoic magmatism of Northern Taimyr: new insights into the tectonic evolution of the Russian High Arctic Int. Geol. Rev. (IF 3.657) Pub Date : 2020-09-22 Mikhail Kurapov; Victoria Ershova; Andrei Khudoley; Marina Luchitskaya; Alexander Makariev; Elena Makarieva; Irina Vishnevskaya
We report new results of a comprehensive study into Carboniferous – Early Permian granite magmatism of the northern Taimyr Peninsula, Russia (southern part of the Kara Terrane). U-Pb zircon ages (SHRIMP and LA–ICP–MS) represent the crystallization ages of these intrusions and range from ca. 344.5 to 288.4 Ma, defining the onset of granite magmatism during the Early Carboniferous (Visean; ca. 344 Ma)
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Special issue on Mesozoic-Cenozoic tectono-magmatic evolution of Iran Int. Geol. Rev. (IF 3.657) Pub Date : 2020-09-21 Hossein Azizi; Jan Golonka; Federico Rossetti; Hadi Shafaii Moghadam
(2020). Special issue on Mesozoic-Cenozoic tectono-magmatic evolution of Iran. International Geology Review: Vol. 62, Mesozoic-Cenozoic tectono-magmatic evolution of Iran, pp. 1611-1614.
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Geochronology and petrogenesis of the Late Neoproterozoic granitic gneisses of Golpayegan metamorphic complex: a new respect for Cadomian crust in the Sanandaj-Sirjan zone, Iran Int. Geol. Rev. (IF 3.657) Pub Date : 2020-09-21 Arezoo Moradi; Nahid Shabanian; Ali Reza Davoudian; Hossein Azizi; José Francisco Santos; Yoshihiro Asahara
The studied granitic gneiss bodies of the Golpayegan metamorphic complex, located in the central part of the Sanandaj Sirjan Zone (SaSZ), in western Iran. Zircon U-Pb dating of two samples shows that the crystallization of the protolith occurred at 557 ± 12 Ma in the Late Neoproterozoic (Ediacaran), broadly coeval to the Neoproterozoic-Early Palaeozoic basement in other parts of Iran. Geochemically
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Early Palaeozoic alkaline trachytes in the North Daba Mountains, South Qinling Belt: petrogenesis and geological implications Int. Geol. Rev. (IF 3.657) Pub Date : 2020-09-17 Hang Yang; Shao-Cong Lai; Jiang-Feng Qin; Ren-Zhi Zhu; Shao-Wei Zhao; Yu Zhu; Fang-Yi Zhang; Ze-Zhong Zhang; Xing-Ying Wang
Early Palaeozoic alkaline magmatism is widely preserved in the North Daba Mountains, South Qinling Belt (SQB), predominately composed of basalt–diabase and trachyte–syenite. The petrogenesis of the felsic rocks and their genetic connections with the mafic members remain controversial. Here, an integrated investigation, combining geochronology and whole-rock and Sr–Nd isotopic geochemistry, is conducted
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