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On greenhouse and icehouse climate regimes over the Phanerozoic Terra Nova (IF 2.4) Pub Date : 2024-03-14 Christian Vérard
Throughout the Phanerozoic and more, the Earth has experienced cold and hot periods, which are typically associated with long‐lasting (hundreds of million years, Ma) greenhouse and icehouse climate regimes. Now, most published sea‐level curves report two main maxima in the Cretaceous and Ordovician superimposed on a multitude of short‐term fluctuations. The big humps are shown to be predominantly the
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Eclogite dehydration and melt-induced embrittlement at high-pressure conditions Terra Nova (IF 2.4) Pub Date : 2024-02-14 Anna Rogowitz, Simon Schorn, Benjamin Huet
We document the complex interaction between metamorphic reactions and deformation behaviour at high-pressure conditions by combining (micro-) structural, petrographical and geochemical data from an eclogite body. The well-equilibrated eclogite fabric is crosscut by mineral veins. Precipitated veins host the eclogitic high-pressure assemblage with variation in modal composition, indicating that fracturing
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Direct dating rodingitization in the northern North China Craton using garnet U–Pb geochronometry Terra Nova (IF 2.4) Pub Date : 2024-02-12 Jing Ran, Hao Wang, Jin-Hui Yang, Shi-Tou Wu, Yu-Sheng Zhu, Ya-Dong Wu, Lei Xu, Chao Huang, Bao-Quan Zhou
The formation of rodingites has been a continually controversial topic, largely due to the absence of minerals that can be unambiguously dated. Here, we present a case study that utilized LA-ICPMS garnet U–Pb dating, in conjunction with field investigations, petrology and Raman spectroscopy, to reveal the age and petrogenesis of rodingite in the northern North China Craton. The rodingites are spatially
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Coupled U–Pb and 40Ar/39Ar chronology of late-stage intrusions at Elba Island (Italy) supports late Miocene long-lived magma reservoirs in the Tyrrhenian upper crust Terra Nova (IF 2.4) Pub Date : 2024-02-07 F. Mazzarini, L. Bracciali, G. Musumeci, J. R. Wijbrans, K. Kuiper, M. S. A. Horstwood
The late Miocene Monte Capanne and Porto Azzurro plutons are investigated by means of coupled U–Pb zircon and 40Ar/39Ar white mica dating to test the occurrence of long-lived magmatic systems in the upper crust. Zircon crystallized for >1 Ma in both plutonic systems, with supersolidus conditions overlapping for ~220 ka indicating previously unrecognized co-existence of the two reservoirs. The development
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Refining vanadium hyper-enrichment in black shales of the Late Devonian–Early Mississippian Bakken Formation (USA) Terra Nova (IF 2.4) Pub Date : 2024-01-11 Yunfeng Wang
Vanadium hyper-enrichment (V ≥ 500 μg g−1) is widespread in ancient marine organic-rich sedimentary rocks and is controlled by its source and accumulation. To understand how V source and accumulation control V hyper-enrichment, the V hyper-enriched organic-rich black shales of the Late Devonian–Early Mississippian Bakken Formation (USA) were investigated here. The results imply that V in the Bakken
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Detrital peridotite minerals reveal recycled arc mantle beneath Marion Rise, Southwest Indian Ridge Terra Nova (IF 2.4) Pub Date : 2023-12-26 Yin-Zheng Lin, Chuan-Zhou Liu, Henry J. B. Dick, Ross N. Mitchell, Shi-Tou Wu, Tong Liu, Wei-Qi Zhang, Zhen-Yu Zhang
The recycling of subcontinental lithospheric mantle back into the asthenosphere during continental breakup is potentially a major but underappreciated process in plate tectonics. Here, we report major and trace elements for detrital peridotite minerals in carbonate breccias dredged from the Marion Rise, Southwest Indian Ridge. With an emphasis on the trace elements of the relatively abundant orthopyroxene
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3D-seismic evidence for thick-skinned tectonics in a ‘classic’ thin skinned tectonics region (external Alpine foreland, Switzerland) Terra Nova (IF 2.4) Pub Date : 2023-12-14 Kateřina Schöpfer, Kurt Decker, Fatemeh Nazari, Herfried Madritsch
The north-western Alpine foreland in Switzerland and France comprises the Late Miocene Jura Mountains, considered a type example for thin-skinned thrusting where deformation of the sedimentary cover is decoupled from the basement along a regional basal detachment. To what extent basement faults were involved during its deformation is a matter of debate. We use 3D seismic data to investigate the deformation
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Landslide susceptibility zoning based on Rock Engineering System application to the Tehran case study Terra Nova (IF 2.4) Pub Date : 2023-12-15 Ali Khosronezhad, Mohsen Pourkermani, Mahmoud Almasiyan, Soheila Bouzari, Ali Uromeihy
Landsliding and slope instability pose significant risks to human settlements and infrastructure. This study aims to develop a landslide susceptibility map for the mountainous regions of Tehran province, Iran. The rock engineering approach was employed at a regional scale, utilizing a database of regional landslides. The semi-quantitative Rock Engineering System method was applied, considering 10 conditioning
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The effect of pre-existing fabrics on plate bending and seismicity in Alaska subduction zone Terra Nova (IF 2.4) Pub Date : 2023-11-27 Zonglin Guo, Jian Lin, Jiangyang Zhang, Fan Zhang, Xiaodong Yang, Zihua Cheng, Pengcheng Zhou
Remnant fabrics inherited from mid-ridge play a key role in variations of plate deformation, hydration and seismicity along subduction zones. However, the quantitative relationships between the orientation of these remnant faults, plate bending and seismic activity at subduction zones still remain unclear. Here, we investigated the flexure of the Alaska subducting plate and assessed the relations between
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Tsunami potential in the Makran subduction zone: Amplification effects from earthquake rupture directivity and speed Terra Nova (IF 2.4) Pub Date : 2023-11-22 Zhanying Chen, Jian Lin, Qiang Qiu, Zhiyuan Zhou, Fan Zhang
The Makran subduction zone has historically experienced major earthquakes and tsunamis. Here, we integrate fault morphology, InSAR measurements, and high-resolution bathymetry to quantitively evaluate potential future tsunami sources and tsunami wave characteristics. We systematically investigate how earthquake rupture speed and direction could affect tsunami hazards for the Makran region. Our analyses
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Source-to-sink tandem geochronology reveals tectonic influences on the Cambrian Transcontinental Arch of Laurentia Terra Nova (IF 2.4) Pub Date : 2023-11-22 Mark E. Holland, Michael Mohr, Mark Schmitz, Lauren Madronich, Karl Karlstrom
Competing hypotheses attribute the regional loss of 1.2–1.0 Ga detrital zircon from the Cambrian Sauk Sequence in southwestern North America to differing tectonic controls on surface topography. We test three hypotheses with source-to-sink detrital zircon provenance analysis via tandem in situ and isotope dilution U–Pb geochronology paired with geochemical and Hf-isotope tracers. Our data indicate
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Degassing of soil gas radon and its implication to fault activity in the western margin of the Ordos Block, China Terra Nova (IF 2.4) Pub Date : 2023-11-21 Zhaofei Liu, Zhi Chen, Ying Li, Peng Du, Yuanxin Zhao, Lei Lei, Chang Lu, Ruilin Huangfu
Soil gas radon (Rn) serves as an effective indicator for assessing fault activity in fault zones. Measurement of Rn degassing at the active faults was conducted twice in 2017 and 2018 to assess fault activity in the western margin of the Ordos block. The concentration and flux values of Rn ranged from 0.41 to 40.93 kBq m−3 and 5.17 to 140.33 mBq m−2 s−1, respectively. The compression of the Tibetan
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Cover Image Terra Nova (IF 2.4) Pub Date : 2023-11-10 Wen Shi, Shi Chen, Huai Zhang, Zhen Zhang, Jiancheng Han
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The micro-seismicity of Co. Donegal (Ireland): Defining baseline seismicity in a region of slow lithospheric deformation Terra Nova (IF 2.4) Pub Date : 2023-11-06 Federica Riva, Nicola Piana Agostinetti, Simone Marzorati, Clare Horan
A catalogue of precisely located micro-seismicity is fundamental for investigating seismicity and rock physical properties in active tectonic and volcanic regions and for the definition of a ‘baseline’ seismicity, required for a safe future exploitation of georesource areas. In this study, we produce the first manually revised catalogue of micro-seismicity for Co. Donegal region (Ireland), an area
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Subduction signature in the Internal Ligurian units (Northern Apennine, Italy): Evidence from P–T metamorphic peak estimate Terra Nova (IF 2.4) Pub Date : 2023-10-30 Francesca Meneghini, Maria Di Rosa, Michele Marroni, Hugues Raimbourg, Luca Pandolfi
The Internal Ligurian units (Northern Apennine) represent deformed and metamorphosed fragments of the oceanic lithosphere of the Ligure–Piemontese oceanic basin. Different tectonic models have been proposed for the geodynamic setting in which the deformation and metamorphism have been acquired. However, the lack of updated, clear, thermo-barometric data has made it hard to unambiguously discriminate
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Mongolian micro-continental blocks in Columbia/Nuna: Zircon U–Pb–Hf isotopic evidence for long-lasting Mongolia–Western Siberia connection Terra Nova (IF 2.4) Pub Date : 2023-10-24 Stephen Collett, Igor Soejono, Vít Peřestý, Karel Schulmann, Pavla Štípská, Jitka Míková, Nikol Novotná
The Mongolian micro-continental fragments play an important geodynamic role in the Palaeozoic evolution of the Central Asian Orogenic Belt. However, the original provenance of individual blocks within the Nuna/Columbia and Rodinia supercontinents is not well constrained. In this work, we present zircon U–Pb and Lu–Hf isotopic data from the Mesoproterozoic to Neoproterozoic metamorphosed cover of the
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Pleistocene glaciomarine laminated muds in the Central Basin of the northwestern Ross Sea and their palaeoceanographic records Terra Nova (IF 2.4) Pub Date : 2023-10-20 Boo-Keun Khim, Young Kwan Sohn, Min Kyung Lee, Sunghan Kim, Jae Il Lee, Kyu Cheul Yoo
Glaciomarine laminated muds around the Antarctic continental margin are important in the marine geological record related to ice sheet dynamics. Microscopic observation and backscattered electron imagery of Pleistocene laminated muds in the Central Basin (Ross Sea) reveal that the light laminae comprise terrigenous angular to subangular silt-sized particles, scattered diatom fragments, and eroded sand-sized
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Linking rifted margin crustal shape with the timing and volume of magmatism Terra Nova (IF 2.4) Pub Date : 2023-10-13 Pauline Chenin, Simon Tomasi, Nick Kusznir, Gianreto Manatschal
Determining the volume and timing of magmatism during rifting and breakup is challenging due to the similar density and seismic velocity of inherited continental crust, magmatic additions and serpentinized mantle; and the difficulty of dating magmatic additions. Here rules of thumb to estimate these are proposed based on the characteristics of the top basement and Moho on seismically imaged margins
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Episodic Late Cretaceous to Neogene crustal thickness variation in southern Tibet Terra Nova (IF 2.4) Pub Date : 2023-10-12 Kurt E. Sundell, Andrew K. Laskowski, Caden Howlett, Paul Kapp, Mihai Ducea, James B. Chapman, Lin Ding
Recent advancements in quantitatively estimating the thickness of Earth's crust in the geologic past provide an opportunity to test hypotheses explaining the tectonic evolution of southern Tibet. Outstanding debate on southern Tibet's Cenozoic geological evolution is complicated by poorly understood Mesozoic tectonics. We present new U-Pb geochronology and trace element chemistry of detrital zircon
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High positive carbonate carbon isotope excursion identified in the North China Craton: Implications for the Lomagundi–Jatuli Event Terra Nova (IF 2.4) Pub Date : 2023-10-05 Shuan-Hong Zhang, Hong-Yu Wang, Hao-Shu Tang, Yu-Hang Cai, Ling-Hao Kong, Jun-Ling Pei, Qi-Qi Zhang, Guo-Hui Hu, Yue Zhao
Records of the Lomagundi–Jatuli Event (LJE) are well preserved globally, but high δ13Ccarb carbonates have not been identified in the North China Craton (NCC). Our results on ~3–4 km thick carbonates from the newly confirmed Palaeoproterozoic successions in Fanhe Basin in the northeastern NCC show that the ~2.20–2.06 Ga carbonates have positive carbon isotope excursion and those deposited after 2.06 Ga
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Storage in the deep aquifer: Stochastic process in time and frequency domain using groundwater level response to seismic activation of the Tohoku earthquake, Japan, 2011 Terra Nova (IF 2.4) Pub Date : 2023-10-03 David Ching-Fang Shih
This study delves into the interplay of Rayleigh wave-groundwater-aquifer dynamics, utilizing seismic data from designated stations, particularly the magnitude 9 event on March 11, 2011 (02:46:23 PM epicenter), Tohoku earthquake, Japan. Auto spectra uncover significant peaks, linking groundwater level with the vertical motion of Rayleigh waves. High coherence between groundwater levels and seismogram
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Impact of tidal friction on the motion of lithospheric plates and earthquake activity Terra Nova (IF 2.4) Pub Date : 2023-09-29 Csilla Fodor, Péter Varga, Nico Sneeuw
This paper draws attention to the contribution of tidal friction (TF) to plate tectonic processes. Our proposed model supports recent geodetic observations and geodynamic models highlighting exogenous local contributions to plate motions. The TF has a westward effect on lithospheric plates and the lithosphere as a whole. To determine the extent of this effect, we use the asthenospheric viscosity estimated
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Geo-thermochronological analysis reveals transition from transverse to axial detrital inputs during Cretaceous rifting in the Songliao Basin, NE China Terra Nova (IF 2.4) Pub Date : 2023-09-25 Nan Wang, Zhiyong Zhang, Marco G. Malusà, Jien Zhang, Lin Wu, Dunfeng Xiang, Wenjiao Xiao
The impact of tectonics, volcanism and climate in controlling temporal and spatial variations in rift-basin sedimentation is still poorly understood. Here, we tackle this issue by the analysis of mid-Cretaceous sediments deposited in the Songliao Basin, northeastern China. We present new zircon U–Pb, apatite fission-track and trace-element data from the northeastern basin, which are discussed within
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A craton-like subcontinental lithospheric mantle beneath the Trans-North China Orogen revealed by the ca. 1.54 Ga kimberlites Terra Nova (IF 2.4) Pub Date : 2023-09-21 Yu-Sheng Zhu, Jin-Hui Yang, Qiu-Li Li, Hao Wang, Ya-Dong Wu, Fu-Yuan Wu
Ancient orogens within the supercontinent like Columbia can remain stable evolution as long as the cratons. What kind of lithospheric mantle was beneath those orogens and how it evolved into a stable state are still enigmatic. The Trans-North China orogen (TNCO) is one of the typical collisional orogens within the Columbia supercontinent and was formed at ca. 1.85 Ga. Our work reveals that a cluster
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Geophysical-petrological modelling of the crust and upper mantle structure across the North-South Gravity Lineament in NE China: Insights into the lithospheric thinning mechanism Terra Nova (IF 2.4) Pub Date : 2023-09-20 Sheng Zhu, Yangfan Deng, Zhou Zhang, Xin Li
The North-South Gravity Lineament (NSGL), characterized by an abrupt variation in both the Bouguer gravity anomaly and topography, acts as a significant geological boundary in eastern China. The formation of such a lateral feature is believed to be associated with lithospheric thinning. The Songliao Basin (SLB) is considered to mark the centre of the lithospheric thinning in Northeast China, whereas
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Two Paleoproterozoic tectono-thermal events in the Central Orogenic belt, North China craton, determined from EPMA Th–U–Pb monazite geochronology of the Zanhuang massif Terra Nova (IF 2.4) Pub Date : 2023-08-31 Junpeng Wang, Yunzhe Jiao, Kang Jiang, Timothy Kusky, Lu Wang, Hao Deng
Tectono-thermal records older than ca. 1.8 Ga in the North China craton have been poorly resolved given that they have been strongly overprinted by younger events, despite being key to understanding the tectonic evolution of the craton. We report results of monazite Th–U–Pb isochron geochronology via electron probe microanalysis on the Zanhuang massif in the North China craton, to determine its detailed
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Alkaline magmatism from the Lublin–Baltic area of Poland (SW slope of the East European Craton)—Manifestation of hitherto unrecognized early Carboniferous igneous province Terra Nova (IF 2.4) Pub Date : 2023-08-29 Paweł Poprawa, Krzysztof Nejbert, Piotr Krzywiec, Ewa Krzemińska, Leszek Krzemiński, Stanisław Mazur, Ewa Słaby
Our study of boreholes, seismic survey and magnetic data from the region between the Baltic Basin and the Lublin Basin indicates the existence of numerous buried intrusions and effusive complexes, most of them unnoticed so far, together with a few igneous massifs. They are of alkaline character and developed in a time span of c. 348 to 338 Ma. Deep seismic data reveal the presence of large sills (up
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A novel approach for quantifying similarities between different debris flow sites using field investigations and numerical modelling Terra Nova (IF 2.4) Pub Date : 2023-08-22 Minu Treesa Abraham, Neelima Satyam, Biswajeet Pradhan
Debris flows are geomorphological processes that affect the landscape evolution process of any region. In this study, an integrated methodology is proposed to identify the chance of further debris flows and quantify the similarities between debris flow locations, materials and rheology, using field and laboratory investigations and remote sensing data. The method was tested for four failure-triggered
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A review of the tectonic, volcanological and hazard history of Vulcano (Aeolian Islands, Italy) Terra Nova (IF 2.4) Pub Date : 2023-08-19 Gianfilippo De Astis, Domenico M. Doronzo, Mauro A. Di Vito
Vulcano is one of the seven volcanic islands composing the Aeolian Islands archipelago (Southern Italy), which also includes three other active volcanoes. The island was originally a stratovolcano like Stromboli; afterwards, its shape turned towards a complex structure composed of several volcanic landforms of different sizes. This is due to the great variability of the tectonic and volcanic phenomena
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Miocene tectonic activity at the boundary between NE Pannonian and NW Transylvanian basins (Romania): Insight from new seismic data Terra Nova (IF 2.4) Pub Date : 2023-08-18 Ionelia Panea, Ioan Munteanu, Carmen Gaina, Victor Mocanu, Relu Dumitru Roban, Catalin Florin Bouaru
Situated at the junction between the Eastern Carpathians Mountains, the Pannonian and the Transylvanian basins, the Baia Mare region (Romania) has a complex geological history that witnessed the interaction among the three main tectonic provinces. Here, we report results from new seismic reflection measurements that provide modern information about the subsurface geological structure. The integrated
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Insights on the uplift mechanism of the eastern Tibetan Plateau from the flexural isostasy study Terra Nova (IF 2.4) Pub Date : 2023-08-09 Wen Shi, Shi Chen, Huai Zhang, Zhen Zhang, Jiancheng Han
It is generally believed that the rapid uplift of the eastern Tibetan Plateau is due to the continuous continental collision between the Indian and Eurasian plates. But the uplift mechanisms of the eastern Tibetan Plateau remain uncertain. The analysis of flexural isostasy can provide new insights into those uplifting mechanisms. In this study, the effective elastic thickness ( T e ) and load ratio
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Age and origin of a Guadalupian tuff in the E'Xi rift basin in South China: Evidence for the Emeishan continental hotspot track? Terra Nova (IF 2.4) Pub Date : 2023-08-09 Minglong Li, Liang Qiu, Deshun Zheng, Dan-Ping Yan, Youjun Zhang, Boyong Yang, Mingyin Yang, Zhiyong Cai, Keyuan Xu, Qiang Huang, Wangxue Tian
Unlike oceanic hotspot tracks, continental hotspot tracks are difficult to recognise, although they can provide unique insights into crustal deformation and intraplate magmatism. Here, we present whole-rock geochemical and Sr–Nd isotope, and zircon U–Pb age and Hf isotope data for a tuff from the E'Xi rift basin in the South China Block. The zircons yielded a 206Pb/238U age of 267.0 ± 2.0 Ma, which
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Emplacement and associated sedimentary record of the Jurassic submarine salt allochthon of the Wurzeralm (Eastern Alps, Austria) Terra Nova (IF 2.4) Pub Date : 2023-08-07 Maditha Kurz, Oscar Fernandez, Lino Eggerth, Bernhard Grasemann, Philipp Strauss
A fossil salt sheet emplaced in the Jurassic in submarine conditions is described in the Eastern Alps of Austria, providing unique insights into the emplacement of similar submarine structures and their potential control on depositional systems. The salt sheet is a plug-fed extrusion emplaced due to squeezing of a salt diapir under compression. The preserved mylonitic shear fabric in the evaporites
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Uplift, deflation and marine onlap of a Jurassic rift dome, illustrated by a backstepping Middle–Upper Jurassic shelf-to-slope succession, Geographical Society Ø, East Greenland Terra Nova (IF 2.4) Pub Date : 2023-07-31 Finn Surlyk, Peter Alsen, Jussi Hovikoski, Stefan Piasecki
“Doming–rifting–spreading” constitute the main phases of classical plate tectonics. The Middle–Upper Jurassic succession of East Greenland is interpreted as reflecting formation, deflation and onlap of a rift dome, similar to contemporaneous rift domes in the North Sea, Denmark and southern Sweden. The succession forms a northwards backstepping and onlapping early rift succession in the N–S oriented
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Continental and island arc segmentation: Implications for retro-arc and pro-arc foreland basin and backarc basin geometries and sediment distributions Terra Nova (IF 2.4) Pub Date : 2023-07-28 Keith Martin
Segmented magmatic arcs create arc-parallel variable loads and influence associated foreland basins through flexural isostasy along strike, in addition to standard subduction-perpendicular foredeep/forebulge/backbulge models. Segmentation occurs in both continental and island arcs (Aleutians, Calabria, Japan, Kuril/Kamchatka, Lesser Antilles, Solomon Islands and Sumatra/Java). Some segments have variable
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Numerical constraints on the one-stage and two-stage Greater India collision models Terra Nova (IF 2.4) Pub Date : 2023-07-16 Qian Li, Zhong-Hai Li, Pengpeng Huangfu
India-Asia collision is generally believed to have collided since 55 ± 5 Ma, with a total amount of convergence of 2900–4400 km. Besides the overriding Tibetan lithospheric shortening, a large amount of convergence has to be accommodated by the subducting plate of Greater India. Three typical India-Asia collision models have been proposed, including the Greater Indian Continent (GIC) model, Intra-Oceanic
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Predictable time preservation on passive continental margins revealed from forward stratigraphic models Terra Nova (IF 2.4) Pub Date : 2023-06-26 Sarah E. Baumgardner, Andrew S. Madof, Ashley D. Harris, Alicia C. M. Kahn
Although the majority of the world's sedimentary basins are located along passive continental margins, the link between their stratigraphy and time architecture has not been fully investigated in three dimensions. Here, using a 3D numerical forward stratigraphic model, we report a previously unidentified trend: an increase in temporal completeness from the shelf to the upper slope and a reduction towards
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Burial in the western Central Andes through Oligocene to Miocene ignimbrite flare-ups recorded by low-temperature thermochronology in the Cañete Canyon, Peru Terra Nova (IF 2.4) Pub Date : 2023-06-13 Laurence Audin, Benjamin Gérard, Cécile Gautheron, Stéphane Schwartz, Carlos Benavente, Xavier Robert, Peter van der Beek, Rosella Pinna-Jamme, Mélanie Balvay, Matthias Bernet, Audrey Margirier, Swann Zerathe
Thermochronological data are essential to constrain thermal and exhumation histories in active mountain ranges. In the Central Andes, bedrock outcrops are rare, being blanketed by widespread late Palaeogene–Neogene and younger volcanic formations. For this reason, the exhumation history of the Western Cordillera (WC) in the Peruvian Andes has only been investigated locally along the mountain range
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The new global tectonic map—Analyses and implications Terra Nova (IF 2.4) Pub Date : 2023-06-12 Janpieter van Dijk
A full new tectonic model of the Earth is presented based a complete new tectonic interpretation carried out during a 10-year project. It covers a huge amount of available geophysical and geological datasets, where ca. 11 000 tectonic elements such as faults and thrusts, transform faults, rift zones, passive margins and oceanic extension ridges and numerous other features have been mapped, and classified
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Red or green: Overprinting of the climatic signal in Miocene sediments, South China Sea (IODP Expedition 368, Site U1502) Terra Nova (IF 2.4) Pub Date : 2023-06-09 E. C. Ferré, S. Satolli, H. Wu, P. Persaud, D. Çukur, S. A. Bowden
Sedimentary beds of alternating red and green colour are commonly interpreted to reflect orbitally-forced cyclic climatic, syn-depositional conditions, although colour changes caused by post-depositional fluids are also documented. Results from IODP Hole U1502A marine sediments in the South China Sea exemplify post-depositional reducing fluid–rock interactions that locally changed the sediment colour
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Sediment provenance signal of the discontinuous retroarc topography in the northern Andes during the Early Cretaceous Terra Nova (IF 2.4) Pub Date : 2023-06-09 Santiago León, Sebastián Jiménez-Rodríguez, Alejandro Piraquive, Sandra Florez-Amaya, Jimmy Muñoz-Rocha, Mary Luz Peña-Urueña, Amed Bonilla, Ingrid Facio Lince, David Contreras-Fayad, Carolina Jiménez
A large dataset of detrital zircon U–Pb ages (N = 5940) of Aptian-Albian strata of the Colombian-Ecuadorian retroarc region suggests that these rocks were sourced from Proterozoic cratonic and Permian–Triassic to Cretaceous rocks of the Andean proto-Cordilleras. The nonconformity between Aptian-Albian strata and Proterozoic rocks of the Garzón Massif indicates the existence of positive relief in this
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Imaging of post-collisional deformations on the NE Tisza continental unit using ambient seismic noise: A case study from the Țicău area, Romania Terra Nova (IF 2.4) Pub Date : 2023-06-01 Ionelia Panea, Deyan Draganov, Catalin Florin Bouaru, Ioan Munteanu
The Ţicău area (NW Romania) is part of the collisional zone between the Tisza and Dacia mega-units. Imaging of Ţicău area's subsurface geological structure will contribute to the understanding of the processes, which controlled its tectonic evolution. Analysis of outcrops provides accurate information for the building of kinematic sections used to explain the small-scale deformations of sedimentary
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The control of collisional tectonics over valley morphology: the case of the largest glacier in the European Alps Terra Nova (IF 2.4) Pub Date : 2023-05-31 Ferdinando Musso Piantelli, Sandro Truttmann, Marco Herwegh
Understanding how bedrock properties influence the valley-forming processes of Alpine landscapes is an outstanding challenge. A multi-methodological approach was used to uniformly quantify fault frequency, orientation, and rock hardness of crystalline basement rocks to evaluate their impact on the erosional processes that shaped the valley of the Aletsch Glacier, Switzerland. We show how variations
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Early onset of Pyrenean collision (97–90 Ma) evidenced by U–Pb dating on calcite (Provence, SE France) Terra Nova (IF 2.4) Pub Date : 2023-05-31 Antonin Bilau, Yann Rolland, Thierry Dumont, Stéphane Schwartz, Nicolas Godeau, Abel Guihou, Pierre Deschamps
Early Late Cretaceous uplift of Provence gave rise to the Durance Isthmus. In the present study, U–Pb dating on calcite of compressional structures related to Pyrenean foreland compressional deformation in Provence shows that N-S shortening occurred coeval with emersion of the Durance Isthmus, through the development of combined top-to-the-North to NW thrusts between 97 and 90 Ma. This large-scale
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Seismic evidence for ductile necking of the mid-lower crust beneath the Columbrets Basin (Western Mediterranean) Terra Nova (IF 2.4) Pub Date : 2023-05-20 Adrià Ramos, Antonio Pedrera, Jesús García-Senz, Berta López-Mir, Ramon Salas
The Columbrets Basin is the largest Mesozoic rift basin of the Valencia Trough in the Western Mediterranean. The analysis of a seismic-reflection survey makes it possible to reconstruct the tectonic fabric underlying the sedimentary basin, including the structure of the top of the lower crust and the Moho. It is proposed that the ductile deformation of the mid-lower crust was the main mechanism controlling
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Dispersal of endolithic microorganisms in vesicular volcanic rock: Distribution, settlement and pathways revealed by 3D X-ray microscopy Terra Nova (IF 2.4) Pub Date : 2023-05-16 Hinrich A. Schmid-Beurmann, Wolf-Achim Kahl, Wolfgang Bach, Magnus Ivarsson, Michael Ernst Böttcher, Jörn Peckmann
Pleistocene basanitic rocks of Vesteris Seamount in the Greenland Sea had been found to exhibit an endolithic habitat largely consisting of marine fungi that dwell within abundant vesicles, therefore representing cryptoendoliths. For the first time, we demonstrate that 3D X-ray microscopy can unravel how microorganisms access and migrate through vesicular rock. The fossil assemblages occur within a
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Paleogene–Neogene environmental evolution and the uplift-sedimentation response of the NE Tibetan Plateau Terra Nova (IF 2.4) Pub Date : 2023-05-13 Jiawei Cui, Zhenhong Li, Xiaopeng Dong, Linlin Kou, Junyi Sun, Ting Huang
There are controversies about the climate evolution and driving mechanism around the Tibetan Plateau since the late Cenozoic. To better understand this issue, the Ningnan Basin on the north-eastern margin of the Tibetan Plateau was taken as the research object. The Ningnan Basin was arid at 23–18 Ma under the influence of global climate change. The extensive deformation indicates that the uplift of
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Holocene slip rates and their implications for seismic hazard along the Himalayan Frontal Thrust in western Himalayan Nahan salient Terra Nova (IF 2.4) Pub Date : 2023-05-12 Rahul Kumar Kaushal, Saptarshi Dey, Shantamoy Guha, Naveen Chauhan, Ajit Singh
Protracted interseismic locking of the low-angle décollement of the Himalaya causes strain accumulation and results in growing slip deficit with time. Unlocking the frontal splay of the décollement during high-magnitude earthquakes (Mw ≥6.5) may cause surface ruptures along the Himalayan Frontal Thrust (HFT). According to Paleoseismic investigations and observations on undeformed fluvial strath surfaces
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Active faulting in the Beagle Channel (Tierra del Fuego) Terra Nova (IF 2.4) Pub Date : 2023-05-02 Donaldo Mauricio Bran, Fermín Palma, Marco Menichetti, Emanuele Lodolo, Stefania Bunicontro, Jorge Gabriel Lozano, Luca Baradello, Diego Winocur, Maurizio Grossi, Alejandro Alberto Tassone
In Tierra del Fuego, the Magallanes-Fagnano Fault System (MFFS) accommodates a significant portion of the relative motion between the South America and Scotia plates. However, it remains unclear whether some of the deformation is partitioned southwards, along the Beagle Channel Fault System (BCFS). In this paper, high-resolution seismic reflection profiles were used to identify fault-related ruptures
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A new type of saidenbachite with pseudomorphs after coesite phenocrysts from the north-western Bohemian Massif, Germany Terra Nova (IF 2.4) Pub Date : 2023-05-02 Hans-Joachim Massonne
Saidenbachite started to crystallize from melt under ultrahigh pressure (UHP). This felsic igneous rock is known from two occurrences in the world only. The here reported new type of saidenbachite, found at the type locality in the central Erzgebirge Crystalline Complex, is characterized by millimetre-sized aggregates of coarse-grained quartz in a matrix of significantly smaller grains of garnet, rarely
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A frozen oceanic crystal mush Terra Nova (IF 2.4) Pub Date : 2023-04-20 V. Basch, C. Ferrando, A. Sanfilippo
The processes driving the evolution of crystal mushes are often documented in complex systems where crystallization, assimilation, magma replenishment and mixing occur concurrently and are generally overprinted by compaction and deformation. Documenting the characteristics of an undisturbed crystal mush is thus of upmost importance; it highlights the initial conditions with which complex crystal mush
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Active metal deposition in a giant geothermal system Terra Nova (IF 2.4) Pub Date : 2023-04-19 Chuang Zhang, Antonin Richard, Weilin Hao
Metallogenic models are vital to mineral exploration. However, there is debate concerning the origin of hydrothermal-type ore deposits such as vein-type U and W deposits. The formation, migration, heating and controls on the composition of metal-fertile fluids in active geothermal systems provide insights into the formation of ore-forming fluids. Fluid’s metal contents are relatively high in the Y
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A metasomatised mantle origin for post-collisional porphyry ore-forming magmas in the Sanjiang metallogenic belt, Southwest China Terra Nova (IF 2.4) Pub Date : 2023-04-10 Hongda Hao, Jung-Woo Park
We constrain the magma sources of representative post-collisional ore-associated and barren suites in the Sanjiang metallogenic belt, Southwest China. The ore-associated suites generally have higher Mg# and Cr and Ni contents than the crustal melts. Also, they show wide ranges of whole-rock Nd and zircon Hf isotopes that are similar to the subduction-modified mantle-derived alkaline volcanic rocks
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Constraining modes and rates of horizontal deformation along east Qinling fault system from rotated river basins Terra Nova (IF 2.4) Pub Date : 2023-04-10 Wei Li, Chao Xie, Wei Pang
The planform rotation of river basins has been used as a marker of crustal strain and been used to assess the style and rates of on-fault deformation. We use the geometry of river basins to evaluate horizontal deformation associated with the South China–North China relative block motion in the east Qinling mountains. The long-time average slip rates of the Luonan fault and Shangdan fault are constrained
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Duration of partial melting in the lower crust of the Limpopo collisional belt Terra Nova (IF 2.4) Pub Date : 2023-04-05 Gautier Nicoli, Shreya Mukherjee, Valby van Schijndel, Gary Stevens
In convergent settings, the duration of partial melting in the lower continental crust dictates how lateral shortening is accommodated by the colliding plates. Here we use the example of the ca. 2700 Ma Southern Marginal Zone of the Limpopo Belt, South Africa, to accurately time the different steps of the granulite facies metamorphic event. We date garnet crystallisation in K-poor leucosomes using
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Rainfall-induced ground deformation in southern Africa Terra Nova (IF 2.4) Pub Date : 2023-04-04 Olivier Dauteuil, Marc Jolivet, Louis Gaudaré, Anne-Morwenn Pastier
We present an analysis of ground deformation induced by large-scale seasonal rainfall in Southern Africa, based on GPS and GRACE time series and on simulations of elastic flexural response to hydrological loading. This large-scale study including South Zambia, South Angola, North Namibia and North Botswana displays a latitudinal precipitation gradient between tropical to semi-arid conditions. GRACE
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Triassic in the northernmost Atlantic—Linking North Greenland and the southwestern Barents Sea Terra Nova (IF 2.4) Pub Date : 2023-04-03 Morten Bjerager, Peter Alsen, Jørgen A. Bojesen-Koefoed, Michael B. W. Fyhn, Jussi Hovikoski, Nynke Keulen, Sofie Lindström, Jens Therkelsen, Tonny B. Thomsen
The Wandel Sea Basin in North Greenland was part of the epicontinental Boreal Sea in Triassic time. The basin formed the western margin of the northernmost Atlantic elongated sea connecting southwards with basins along the conjugate Greenland—Norwegian margins. A multidisciplinary dataset including sedimentology, biostratigraphy, organic geochemistry and sedimentary provenance, allow to document its
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Constraining the diagenesis of the Puga cap carbonate from U–Pb in-situ dating of seafloor crystal fans, southern Amazonian craton, Brazil Terra Nova (IF 2.4) Pub Date : 2023-03-24 Davi F. de Carvalho, Afonso C. R. Nogueira, Moacir J. B. Macambira, Cristiano C. Lana, Renan F. dos Santos, Julia Guélard, Pierre Sansjofre
Cap carbonates overlying Marinoan (635 Ma) glacial deposits worldwide record extreme paleoceanographic changes that may have triggered the rise of macroscopic life. However, the lack of geochronological constraints on these successions hinders reconciling climate and environmental change. Their upper part is marked by anomalous aragonite precipitation associated with large transgression and oxygenation
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Interdependence between bacterial EPS and early grain coat development Terra Nova (IF 2.4) Pub Date : 2023-03-15 Dimitrios Charlaftis, Stuart J. Jones, Lars Grimm, Andreas Kappler
Bacteria are the most abundant forms of life we know on our planet, able to survive in a variety of habitats, that play an important role in mineral formation and transformation processes. Here, we present laboratory experiments in which unconsolidated quartz grains were seeded with Geobacter sulfurreducens cells and exposed to a mineral medium solution for 96 hours at temperatures of between 60°C