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Geomorphic provinces and regolith-landform evolution of the Capricorn Orogen, Western Australia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2021-01-21 R. L. Thorne; S. C. Spinks; R. R. Anand
Abstract This study characterises the variation in regolith-landform environments and associated regolith materials in the Capricorn Orogen of Western Australia. Four different geomorphic provinces were identified based on regolith-landform characteristics. The Crystalline Basement Province in the west of the region covers an area of ∼35 000 km2, thin lithosols dominate, and granitic tors are common
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Sequence stratigraphic and petrological analyses of the Cambrian oncoids exposed in the Liaoning Province, North China Platform Aust. J. Earth Sci. (IF 1.492) Pub Date : 2021-01-18 E. Z. Xiao; S. Jiang; T. Zafar; M. Riaz; K. Latif; E. Setoyama; H. Wang; H. Xin
Abstract The Cambrian Miaolingian Series strata are continuously exposed in the North China Platform and contain diverse sedimentary phenomena, including substantial with oncoid-rich units. Limestone samples from the Zhangxia Formation in the Sandaogou section were collected to characterise unique macroscale to microscale sedimentary characteristics of the marine carbonate oncoids. In the oncolitic
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Geology and geochronology of the Two-Thirty prospect, Northparkes district, NSW Aust. J. Earth Sci. (IF 1.492) Pub Date : 2021-01-17 T. J. Wells; David R. Cooke; M. J. Baker; L. Zhang; S. Meffre; J. Steadman; M. D. Norman; J. L. Hoye
Abstract The Northparkes district, central New South Wales, hosts several economic Cu–Au deposits associated with discrete, thin, porphyry intrusive complexes emplaced in the Late Ordovician during formation of the Macquarie Arc. The recently discovered Two-Thirty Cu–Au–(Mo) prospect is a mineralised magmatic–hydrothermal breccia complex that is hosted by the moderately east-dipping Goonumbla Volcanic
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Petrography of martite–goethite ore and implications for ore genesis, South Flank, Hamersley Province, Western Australia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2021-01-17 C. S. Perring
Abstract Martite–goethite (M–G) ores are characterised by the pseudomorphic textural replacement of gangue phases (carbonate, silicate and quartz) in the primary banded iron formation (BIF) by fine-grained goethite. This differentiates them petrographically from rocks enriched in Fe as a result of lateritic weathering and leaching of gangue. A preliminary petrographic study of martite–goethite mineralisation
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Correction Aust. J. Earth Sci. (IF 1.492) Pub Date : 2021-01-11
(2021). Correction. Australian Journal of Earth Sciences. Ahead of Print.
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Characteristics and formation mechanisms of Mesozoic compressional structures in the Huanghua Depression, Bohai Bay Basin, China Aust. J. Earth Sci. (IF 1.492) Pub Date : 2021-01-04 W. Li; F. Zhang; Y. Zhang; L. Fu; H. Li
Abstract The Huanghua Depression is a complex secondary tectonic unit in the Bohai Bay Basin of eastern China. This work analyses the geometric features and formation mechanisms of Mesozoic compressional structures developed within the Huanghua Depression. Compressional deformation has formed open-fold, single reverse or thrust faulting, duplex structures and imbricated structures that can be divided
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A geophysical investigation of the 2018 Lake Muir earthquake sequence: reactivated Precambrian structures controlling modern seismicity Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-12-16 S. Standen; M. Dentith; D. Clark
Abstract Seismicity in the intraplate southwest of Western Australia is poorly understood, despite evidence for potentially damaging earthquakes of magnitude > M6. Identifying stress-focusing geological structures near significant earthquake sequences assists in understanding why these earthquakes occur in seemingly random locations across a region of more than 250 000 km2. On 16 September 2018, an
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Geomechanical evaluation of a middle Cambrian unconventional oil and gas play in the southern Georgina Basin, northern Australia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-12-09 E. Tenthorey; B. Ayling
Abstract Middle Cambrian sediments in the southern Georgina Basin contain multiple organic-rich source rocks and have been suggested to be prospective for both conventional and unconventional hydrocarbons. We present new geomechanical data collected from the middle Cambrian Arthur Creek Formation and Thorntonia Limestone in four wells (Baldwin 1, MacIntyre 1, Owen 2, Todd 1) in the southern Georgia
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Agile management and long-term strategy in exploration: the ‘lucky’ discovery of the Sinclair Pollucite Deposit, Eastern Goldfields, Western Australia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-12-07 G. E. Batt; D. Crook; N. Brand; S. Kerr
Abstract Behind the inevitable headlines describing the ‘lucky discovery’ of the Sinclair Pollucite Deposit by Pioneer Resources in a drilling campaign targeting lithium mineralisation, the identification, delineation and development of this resource present a deeper and more substantial tale of fundamental mineral exploration strategy and agile management. A window of opportunity provided by booming
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Uranium in animals, vegetables and minerals: landscape geochemical and biogeochemical expressions of the Four Mile West sedimentary uranium deposit, South Australia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-09-23 S. M. Hill; S. B. Hore; V. J. Normington
Abstract The sediment-hosted uranium deposit at Four Mile West is buried by 130–150 m of sediments yet has a landscape as well as a surficial geochemical and biogeochemical expression of the mineral system. The landscape expression includes exposure of stratigraphy with now-oxidised redox overprinting (including ‘roll-fronts’) equivalent to those in the buried mineralisation. The landscape also includes
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Linking geoheritage sites: Geotourism and a prospective Geotrail in the Flinders Ranges World Heritage Nomination area, South Australia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-10-08 I. D. Lewis
Abstract The Flinders Ranges in the north and Mount Lofty Ranges in the south form a continuous highland chain extending ∼1000 km in eastern South Australia. This region corresponds to outcropping rocks of the Neoproterozoic to Cambrian Adelaide Rift Complex. The semi-arid ranges of the north with their historic mining heritage and the agriculture and vineyards of the south are heavily promoted as
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Pursuing World Heritage for the Flinders Ranges: a personal reflection in memory of Dr Graeme Worboys AM Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-10-28 Jason Irving
(2020). Pursuing World Heritage for the Flinders Ranges: a personal reflection in memory of Dr Graeme Worboys AM. Australian Journal of Earth Sciences: Vol. 67, Special issue: The Flinders Ranges: dawn of life cycles and influences set in an area of outstanding regional geological evolution: Cretaceous and younger, pp. 1211-1212.
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Element enrichment/depletion during faulting in shale-rich surface exposures of the 2008 Wenchuan earthquake (Mw 7.9) and implications for coseismic temperature Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-11-30 Y. Y. Wang; X. Q. Gao; S. J. Li; S. Y. Wang; D. Y. Shi; W. B. Shen
Abstract The coseismic frictional temperature is increasingly recognised as an important factor for the transformation mechanism in shallow crustal faulting. We report changes in the mineralogical and geochemical compositions across the fault zone in the Shaba (SB) exposure of the 2008 Wenchuan earthquake (Mw 7.9), which contained the maximum value of vertical displacement and cut through shale-rich
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Cenozoic volcanism, tectonics and mineralisation of Woodlark Island (Muyuw), Eastern Papua Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-11-22 I. D. Lindley
Abstract Cenozoic geology of Woodlark Island was influenced by events prior to the onset of continental rifting at ca 8 Ma and the slightly later commencement of seafloor spreading in the eastern Woodlark Basin between ca 6 and 3.6 Ma. The embryonic Woodlark Island consisted of latest Paleocene(?)–Eocene shallow marine, deep-water shelf and turbidite deposits (Loluai Formation) and small submarine
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Age and geochemistry of the Boucaut Volcanics in the Neoproterozoic Adelaide Rift Complex, South Australia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-11-18 S. E. Armistead; A. S. Collins; S. Buckman; R. Atkins
Abstract The Adelaide Rift Complex in South Australia records the break-up of Rodinia at a time of great climatic and biological evolution. The Boucaut Volcanics within the Neoproterozoic Adelaide Rift Complex of the Adelaide Superbasin lie at the base of the Burra Group, marking the boundary between the Burra Group and underlying Callanna Group. Despite their significance as one of the few volcanic
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Correlation of the lithostratigraphic facies relationships and depositional environments of the uppermost Silurian through Lower Devonian strata across the central Darling Basin, western New South Wales, SE Australia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-11-18 M. Kh. Khalifa; K. J. Mills
Abstract This paper is focused on the detailed lithostratigraphic facies characterisation of the paleo-environments of the uppermost Silurian through Lower Devonian Winduck Interval strata from the Bancannia South 1, Pondie Range 1 and Booligal Creek 1 and 2 wells, across the central Darling Basin of western New South Wales. Based on data from both wireline logs and drill cores and cuttings, an interpretation
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In situ S isotope analysis and source tracing of pyrite from lacustrine hydrothermal sedimentary rocks: the Chang 7-3 sub-member, Triassic Yanchang Formation, Ordos Basin Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-11-04 J. Y. You; Y. Q. Liu; S. S. Song; D. W. Zhou; Y. Y. Yang
Abstract The Ordos Basin developed a large depression-type lake basin in the Late Triassic. Here, we report on pyrites from lacustrine hydrothermal sedimentary rocks that were found at the bottom of a black shale layer from the Chang 7-3 sub-member of the Triassic Yanchang Formation in Tongchuan and Yaoqu and Well Z9 sections, on the southern margin of the Ordos Basin. Observations of field outcrops
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The transition from the Thomson Orogen to the North Australian Craton from seismic data Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-10-29 B. L. N. Kennett; S. Liang
Abstract The transition between the North Australian Craton and the Thomson Orogen in the area south of the Mount Isa terrane lies under cover and is a critical element in interpretation of the nature of the Tasmanides. The location of the boundary between these domains is controlled by potential field results; the gravity and magnetic signatures are most sensitive to shallow structure, and so there
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Geochemical discrimination of igneous zircon in the Gawler Craton, South Australia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-10-25 A. Brotodewo; C. Tiddy; D. Zivak; A. Fabris; D. Giles
Abstract Zircon from spatially and temporally distinct igneous rock units across the Gawler Craton, Australia, show subtle differences in trace and rare earth element ratios. These igneous suites range in composition from granite, rhyolite to gabbro and originate from the ca 2450 Ma Sleaford Complex, the ca 1850 Ma Donington Suite, the ca 1633–1608 Ma St Peter Suite, the ca 1595–1587 Ma Gawler Range
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Airborne hyperspectral characterisation of hydrothermal alteration in a regolith-dominated terrain, southern Gawler Ranges, South Australia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-10-18 A. S. Caruso; K. D. Clarke; C. J. Tiddy; M. M. Lewis
Abstract Key alteration minerals associated with epithermal and porphyry Cu–Au mineralisation have been successfully identified using HyMap airborne hyperspectral imagery in a regolith-dominated terrain in the southern Gawler Ranges, South Australia. Alteration assemblages were mapped using Spectral Feature Fitting, a spectral matching algorithm, identifying the spatial distribution of localised advanced
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A review of historical earthquakes in Queensland utilising the Trove Newspaper Archive as a primary source Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-10-11 D. Rubenach; J. Daniell; P. Dirks; J. Wegner
Abstract Earthquakes are relatively rare in Queensland. Nevertheless, since European settlement, most parts of the state’s east coast have felt the impacts of several moderate to high-magnitude events. Knowledge of seismic activity in Queensland is limited owing to sparse historical seismograph coverage, and the relatively short period (ca 1825 onwards) for which records are available. Previously published
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Two centuries of water-level records at Lake George, NSW Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-09-30 M. A. Short; R. S. Norman; B. Pillans; P. de Deckker; R. Usback; B. N. Opdyke; T. R. Ransley; S. Gray; D. C. McPhail
Abstract The year 2020 marked the 200th anniversary of European settlers first encountering the ‘noble expanse of water’ of Lake George in New South Wales. Since 1820, unofficial observations and official measurements of the lake’s water-level have been recorded almost continuously by various individuals, research teams, government departments and private companies. The lake’s recent hydrographic history
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Zebra rock and other Ediacaran paleosols from Western Australia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-09-30 G. J. Retallack
Abstract Zebra rock is an ornamental stone from the early Ediacaran, Ranford Formation, around and in Lake Argyle, south of Kununurra, Western Australia. It has been regarded as a marine clay, liquid crystal, groundwater alteration, unconformity paleosol or product of acid sulfate weathering. This study supports the latter hypothesis and finds modern analogues for its distinctive red banding in mottling
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Correction Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-09-27
(2020). Correction. Australian Journal of Earth Sciences. Ahead of Print.
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Ferruginous banding in Sydney sandstone Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-09-23 R. H. Vernon
Spectacular ferruginous (goethite-rich) banding is a common feature of Triassic sandstone in the Sydney Basin, southeast Australia. The banding is of two broad types: (1) intersecting sets (implying water composition in which goethite is stable) and (2) trough-like sets that truncate and obliterate previously formed banding (implying water composition destabilising goethite, probably owing to increased
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Source-to-sink system for peat accumulation in marginal basins of the South China Sea with the Qiongdongnan Basin as an example Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-09-20 Z.-X. Li; Y. Li; D.-D. Wang; P.-L. Wang; G.-C. Zhang; H.-Y. Liu; Y. Liu; X.-J. Li; G.-Z. Song
In the coal-bearing deposits of the Qiongdongnan Basin in the South China Sea, coal seams are for the most part extremely thin, typically less than 0.5 m. Coal streaks are commonly observed but are not concentrated. In addition, the ash content of the coal components is very high, indicating that the geological conditions of peat accumulation and coal formation were very unstable. For these reasons
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Age and origin of the Cumberland (Inner Sydney) Basin of southeast Australia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-09-17 S. J. Gale
The Cumberland Basin is a structural and topographic low within the sedimentary Sydney Basin of southeast Australia. To the west, the Blue Mountains Plateau was uplifted along the north–south Lapstone Structural Complex after around 90 Ma, with uplift largely completed by middle Miocene to Pliocene times. To the north, upwarping of the Hornsby Plateau preceded the major phase of movement along the
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The Norfolk Ridge seamounts: Eocene–Miocene volcanoes near Zealandia’s rifted continental margin Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-09-03 N. Mortimer; M. Patriat; P. B. Gans; A. Agranier; G. Chazot; J. Collot; M. P. Crundwell; P. M. J. Durance; H. J. Campbell; S. Etienne
New age and geochemical data are used to investigate the origin of a ∼670 km-long line of eight seamount volcanoes along the western side of the Norfolk Ridge between New Caledonia and New Zealand. Altered lavas and limestones were dredged from three volcanoes during the 2015 Volcanic Evolution of South Pacific Arcs cruise of N/O l’Atalante, so a total of four, including the northernmost and southernmost
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Dating the Acraman asteroid impact, South Australia: the case for deep drilling the ‘hot shock’ zone of the central uplift Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-09-03 G. E. Williams; P. W. Schmidt
The deeply eroded Acraman structure in the Mesoproterozoic Gawler Range Volcanics, Gawler Craton, South Australia, ranks among the world’s largest known impact structures, with a transient crater ∼40 km in diameter and a ∼90 km-diameter collapse crater. An impact age of ca 590 Ma is suggested by Rb–Sr shale dating of Ediacaran strata hosting a related ejecta band of volcanic fragments in the Adelaide
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U–Pb geochronology reveals evidence of a Late Devonian hydrothermal event, and protracted hydrothermal–epithermal system, within the Mount Painter Inlier, northern Flinders Ranges, South Australia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-08-19 S. B. Hore; S. M. Hill; A. Reid; B. Wade; N. F. Alley; D. R. Mason
Abstract The Mount Gee Sinter and the Radium Ridge Breccia within the Mount Painter Inlier, South Australia, preserve evidence of a hydrothermal event peaking during the Late Devonian (ca 365 Ma). Prior to this study, limited data relating to this event were available, but our results of 846 LA-ICPMS U–Pb monazite analyses indicate the timing of this hydrothermal event. The dominant monazite population
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Assessment of magmatic fertility using pXRF on altered rocks from the Ordovician Macquarie Arc, New South Wales Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-08-03 T. J. Wells; S. Meffre; David R. Cooke; J. Steadman; J. L. Hoye
This research presents a new method for assessing magmatic fertility using the portable X-ray fluorescence spectrometer (pXRF) in altered rocks from porphyry terranes. A study of Northparkes and global Cu--Au porphyries highlighted low Zr and Y trends associated with mineralising intrusions. Zircon saturation occurs at low Zr concentrations owing to low-temperature crystallisation depressed by high
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Diachroneity in the closure of the eastern Tethys Seaway: evidence from the cessation of marine sedimentation in northern Pakistan Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-07-12 B. Wadood; S. Khan; A. Khan; M. W. Khan; Y. Liu; H. Li; S. Ahmad; A. Khan
The biostratigraphic information from the last remnants of the Tethys Seaway in northern Pakistan was used to date the cessation of marine sedimentation as a result of the closure of the eastern Tethys Seaway and to give a minimum time for the India–Asia collision. The current detailed biostratigraphic investigations of the Eocene Kohat Formation in the Kohat Basin divulged that the rock unit in the
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Stratigraphic constraints on the Lower Cretaceous Orallo Formation, southeastern Queensland: U–Pb dating of bentonite and palynostratigraphy of associated strata Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-07-09 J. J. Cooling; J. L. Crowley; J. L. McKellar; J. S. Esterle; R. S. Nicoll; V. Bianchi
This study presents two chemical abrasion-thermal ionisation mass spectrometry (CA-TIMS) U–Pb zircon ages from tuffs as well as palynostratigraphic results from the embracing sedimentary succession of the Orallo Formation, Surat Basin, Queensland. Samples were taken from two Geological Survey of Queensland (GSQ) stratigraphic holes, GSQ DRD 26 and GSQ Roma 2. Palynological results assign the upper
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Detrital zircon age studies of Haast Schist in western Otago and Marlborough, New Zealand: constraints on their protolith age, terrane ancestry and Au–W mineralisation Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-07-06 C. J. Adams; H. J. Campbell; W. L. Griffin
Detrital zircon U–Pb ages are reported from the Haast Schist in western Otago and Marlborough, South Island, New Zealand. The majority are from the Aspiring Lithological Association in Otago, which intervenes between Caples Terrane and Rakaia Terrane protoliths. These indicate provenances similar to those in established Jurassic and Late Triassic sandstones of the Waipapa Composite Terrane in the North
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Warrumbungle Volcano: facies architecture and evolution of a complex shield volcano Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-07-04 K. F. Bull; A. L. Troedson; S. Bodorkos; P. L. Blevin; M. C. Bruce; K. Waltenberg
Abstract We present a new geological map of Warrumbungle Volcano created from volcanic facies field mapping, new geophysical, geochemical and geochronological data as well as data from previous studies. Field mapping and petrography defined 19 volcanic and two mixed volcanic--sedimentary facies. Facies identification and distribution in conjunction with geochemical analyses indicate an early shield-forming
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Geological setting of exceptional geological features of the Flinders Ranges Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-06-24 W. M. Cowley
The Flinders Ranges in South Australia mainly comprise folded Neoproterozoic to Cambrian sedimentary rocks of the Adelaide Geosyncline, with local inliers of its Paleo–Mesoproterozoic igneous and metamorphic basement. A widely varied range of exceptional geological features is displayed in the rocks of the ranges and forms the basis of a proposal for recognition as a UNESCO World Heritage Serial Property
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Diverse provenance of the Lower Cretaceous sediments of the Eromanga Basin, South Australia: constraints on basin evolution Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-06-17 E. Baudet; C. Tiddy; D. Giles; S. Hill; G. Gordon
This study presents new geochemical and mineralogical data collected on 13 drill holes across the South Australian part of the Eromanga Basin, with a focus on the Lower Cretaceous Cadna-owie Formation, Bulldog Shale, Coorikiana Sandstone and Oodnadatta Formation. Mineralogical and geochemical data are used to determine the provenance of the sediments along with the paleoenvironments at the time of
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Multi-disciplinary ore deposit exploration in Sonqor, northwest Iran Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-06-10 S. Niroomand; D. Poreh; A. Kananian
Multi-disciplinary exploration methods are used to explore for possible ore deposits in the Sonqor area, Iran, which lies within the Sanandaj-Sirjan Zone, and contains significant iron, copper and gold mineralisation. Hydrothermal alteration was mapped using field, remotely sensed, geophysical and geochemical data as well as Landsat-8 Operational Land Imager, Landsat Enhanced Thematic Mapper plus,
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Post-orogenic structural style and reactivation in the northern Bowen Basin, Eastern Australia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-06-10 A. Babaahmadi; P. Brooks; M. Grant
The northern Bowen Basin in eastern Australia was affected by the middle Permian–Late Triassic Hunter--Bowen Orogeny, but the effect of the post-orogenic deformation events is less well understood. 2D seismic surveys and field observations were utilised to the east of Moranbah to understand structural style and reactivation in the northern Bowen Basin. Large-scale faults include the Daunia and New
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Intermittent subduction of the Paleo-Tethys Ocean in the middle–late Permian: evidence from the mafic–intermediate intrusive rocks in the East Kunlun Orogenic Belt Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-06-10 J. Sun; Y. Qian; Y. Li; H. Li; S. Tian; F. Sun
In this study, we investigate the geochronology, geochemistry, zircon Lu–Hf isotopes and Sr–Nd isotopes of mafic–intermediate intrusive rocks in the Naxiguole area of the East Kunlun Orogenic Belt (EKOB), northwest China. Zircon U–Pb dating yields formation ages of 254.8 ± 1.2 Ma for gabbros and 251.9 ± 1.3 Ma for gabbrodiorites, suggesting that the mafic–intermediate intrusive rocks were formed in
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Evaluation of favourable hot dry rock areas in the east of the Yishu fault zone in China Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-06-10 Q. Deng; A. Jiang; Z. Tong; H. Lin; Z. Gao; X. Sun; M. Nie
Hot dry rock (HDR) geothermal resources have great development potential and prospects, owing to their wide distribution and high thermal storage temperature. HDR resources are abundant in China, but their exploration and exploitation remain in the early stages. The Yishu fault zone in Shandong Province in eastern China is in a high-temperature geothermal zone of the Pacific Rim. Three craters and
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Assessment of shale gas potential of the lower Permian transitional Shanxi-Taiyuan shales in the southern North China Basin Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-05-28 P. Li; J. C. Zhang; X. Tang; Z. P. Huo; Z. Li; K. Y. Luo; Z. M. Li
The geological research and exploration evaluation of marine–continental transitional shale gas are lagging behind the rapid development of marine and continental shale-gas resources in China. To investigate the shale-gas potential of the lower Permian Shanxi and Taiyuan formations in the southern North China Basin, a series of measurements on representative core samples were conducted to characterise
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Facies analysis and palynology of upper Miocene to Pliocene sediments exposed at Timika–Tembagapura section, Papua, Indonesia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-05-27 R. Fakhruddin; T. Ramli; D. Fadli; D. Kurniadi
This study reports on the recent sedimentological and palynological analysis of the rock unit outcropping at the road between Timika and Tembagapura from KM 73 to KM 92, Papua, Indonesia. The unit has been previously regarded as being late Proterozoic to Permian in age. Sedimentary facies analysis suggests a non-channelised deep-lacustrine slump and debris-flow dominated environment consists of delta
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Sulfur isotopic characteristics of the Zhaxikang Sb–Pb–Zn–Ag deposit in southern Tibet Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-05-25 D. Wang; Y. Zheng; R. Mathur; H. Ren
The Zhaxikang Sb–Pb–Zn–Ag deposit is the only super-large deposit in the North Himalayan Metallogenic Belt, but its genesis is debated. Genetic models include hot springs, magmatic-hydrothermal fluids and sedimentary exhalative overprinted by hydrothermal fluids. Here, we present sulfur isotopic data to constrain the genetic models for this deposit. The δ34SV-CDT values of sulfides in the first pulse
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Subduction erosion: contributions of footwall and hanging wall to serpentinite mélange; field, geochemical and radiochronological evidence from the Eocene HP-LT belt of New Caledonia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-05-20 D. Cluzel
Slivers of mixed and metamorphosed ultramafic, mafic and sedimentary rocks crop out within the Eocene high pressure-low temperature metamorphic complex of northern New Caledonia. These units consist of: (1) slices of the serpentinite sole of Peridotite Nappe (upper plate), which characteristically contain fragmented supra-subduction dykes; (2) Intermediate Mélange units composed of elements of the
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Precise U–Pb baddeleyite dating of the Derim Derim Dolerite, McArthur Basin, Northern Territory: old and new SHRIMP and ID-TIMS constraints Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-05-18 S. Bodorkos; J. L. Crowley; J. C. Claoué-Long; J. R. Anderson; C. W. Magee Jr
Abstract The Mesoproterozoic Roper Group of the McArthur Basin has excellent petroleum potential, but exploration has been hampered by poor constraints on its post-depositional history that has compromised understanding of the tectonostratigraphic evolution of the basin. The Derim Derim Dolerite occupies an important position in the event chronology of the McArthur Basin, having intruded the Roper
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Using amphibolite chemistry to assist structural and stratigraphic interpretation at Broken Hill, Australia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-05-12 B. P. J. Stevens
Multiple samples taken across the strike of conformable syn-depositional amphibolite (meta-dolerite) bodies in the Willyama Supergroup, Broken Hill, showed that all exhibit chemical variation, mostly consistent with igneous fractionation. The fractionation trends are characterised by very significant reduction in MgO, Ni and Cr from base to top of individual sills, increase in Zr, and less regular
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Unravelling the D1 event: evidence for early granite-up, greenstone-down tectonics in the Eastern Goldfields, Western Australia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-05-06 S. A. Jones; K. F. Cassidy; B. K. Davis
The early tectonic history of the Eastern Goldfields Terrane (EGT) is poorly understood, but in places ca 2800 Ma mafic–ultramafic sequences are conformably overlain by ca 2720–2670 Ma sequences (e.g. Leonora and Laverton districts), suggesting minimal early deformation. The first significant angular unconformities occur at the base of the ca 2670–2655 Ma late basins and indicate that deformation was
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Jurassic uplift and erosion of the northeast Queensland continental margin: evidence from (U–Th)/He thermochronology combined with U–Pb detrital zircon age spectra Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-02-10 Y. Cheng; C. N. Todd; R. A. Henderson; M. Danišík; F. Sahlström; Z. Chang; I. Corral
The Jurassic–Cretaceous Great Artesian Basin is the most extensive, and largest volume, sedimentary feature of continental Australia. The source of its mud-dominated Cretaceous infill is attributed largely to contemporary magmatism along the continental margin to the east, but the source of its Jurassic infill, dominated by quartz sandstone, remains unconstrained. This paper investigates the question
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Mineral distribution and provenance of heavy mineral sands (zircon, ilmenite, rutile) deposits from the NW Murray Basin, far western NSW, Australia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-01-30 P. Poon; I. T. Graham; E. A. C. Liepa; D. R. Cohen; I. J. Pringle; D. A. Burkett; K. Privat
There is significant economic interest in the Murray Basin of southeastern Australia as it is proving to be a major heavy mineral sands (HMS) province that will be one of Australia’s major source for production of rutile, zircon and ilmenite. The distribution and provenance of HMS resources in the Murray Basin is poorly understood because of its huge size, limited exploration and the complex depositional
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Paleomagnetism of the Carboniferous Gresford Block, Tamworth Belt, southern New England Orogen: minor counter-clockwise rotation of a primary arc segment Aust. J. Earth Sci. (IF 1.492) Pub Date : 2019-11-10 C. Klootwijk
Four oroclinal structures have been identified from structural, magnetic and gravity trends across a Carboniferous continental arc, forearc basin [Tamworth Belt (TB)] and conjugate accretionary complex in the southern New England Orogen (SNEO) of eastern Australia. None of the structures has yet been confirmed conclusively by paleomagnetism as oroclinal. Ignimbrites are common within the forearc basin
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Granite suites: a problematic concept? Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-01-30 J. D. Clemens; G. N. Phillips
In Australian stratigraphic nomenclature, the concept of granitic rock suites has been in formal use for over a decade. The basis for this suite classification of granitic rocks is inconsistent and, in eastern Australian usage, unsound on several levels. We also note that the approach used in Western Australia is different. Granitic intrusions are probably not truly amenable to any strict, comprehensive
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Two belts of HTLP sub-regional metamorphism in the New England Orogen, eastern Australia: occurrence and characteristics exemplified by the Wongwibinda Metamorphic Complex Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-01-27 K. Jessop; N. R. Daczko; S. Piazolo
Two north–south-trending belts of high-temperature–low-pressure (HTLP) sub-regional metamorphism have been identified in the New England Orogen of eastern Australia. Metamorphic complexes in the ∼1300 km long Early-Permian Inland belt have ages ca 300–290 Ma, and those of the ∼400 km long Mid-Permian Coastal belt ca 275–270 Ma. These periods correspond to the beginning and end of an extended (early–mid
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Metamorphism in the New England Orogen, eastern Australia: a review Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-02-02 K. Jessop; N. R. Daczko; S. Piazolo
This paper summarises current knowledge on metamorphism within the entire New England Orogen (NEO) of eastern Australia. Rocks recording metamorphic assemblages characteristic of each of the three metamorphic facies series (high, medium and low P/T) have been identified within the orogen. These include high P/T blueschists and eclogites, mid P/T orogenic metamorphism and low P/T contact aureoles and
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Generating pseudo-capillary pressure curves from nuclear magnetic resonance (NMR) data: a case study from the Cooper Basin, Australia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-04-23 M. E. Gray; R. Daniel; J. Kaldi; D. Kulikowski
This study evaluates the accuracy of generating pseudo-capillary pressure curves from laboratory nuclear magnetic resonance (NMR) analysis and NMR wireline log data by comparing threshold pressures and curve characteristics to rock-derived mercury injection capillary pressure (MICP) analysis. Accurate production of pseudo-capillary pressure curves from NMR data could negate or reduce the need for expensive
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The stratigraphic significance of early Cambrian (Series 2, Stage 4) trilobites from the Smith Bay Shale near Freestone Creek, Kangaroo Island Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-04-23 J. B. Jago; C. J. Bentley; J. R. Paterson; J. D. Holmes; T. R. Lin; X. W. Sun
The fossiliferous lower Cambrian (Series 2) successions along the north coast of Kangaroo Island, South Australia—known collectively as the Kangaroo Island Group—can be divided into two main areas: a western succession located between Snelling Beach and Smith Bay, which comprises the Mt McDonnell Formation (base), Stokes Bay Sandstone and Smith Bay Shale; and an eastern succession that extends from
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Sedimentary environment and geological significance of the Upper Devonian Wutong Formation in Northern Yangtze Plateau, China Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-04-22 J. Gao; D-W Lv; H-Y Liu
There is an ongoing debate about the evolution and geological significance of sediments deposited during the Upper Devonian period in the Wutong Formation on the northern margin of Yangtze Plate. Although the deposition of the Wutong Formation is reported to have coincided with the period of global sea-level changes, the sedimentary record has not been clearly interpreted. We utilise the lithofacies
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Coeval basin formation, plutonism and metamorphism in the Northern Tasmanides: extensional Cambro-Ordovician tectonism of the Charters Towers Province Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-04-20 R. A. Henderson; C. L. Fergusson; I. W. Withnall
The Charters Towers Province, of the northern Thomson Orogen, records conversion from a Neoproterozoic passive margin to a Cambrian active margin, as characteristic of the Tasmanides. The passive margin succession includes a thick metasedimentary unit derived from Mesoproterozoic rocks. The Cambrian active margin is represented by upper Cambrian–Lower Ordovician (500–460 Ma) basinal development (Seventy
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Top-of-holes sensing techniques: developments within Deep Exploration Technologies Cooperative Research Centre Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-04-16 Y. A. Uvarova; S. Tassios; N. Francis; M. LeGras; J. S. Cleverley; A. Baensch
In this paper, we summarise advancements in top-of-hole sensing achieved within the Deep Exploration Technologies Cooperative Research Centre (DET CRC). It was demonstrated that the drill fines, which were previously discarded, show high potential to act as a representative sample media of the lithologies intersected by the drill hole and can be successfully used for analysis in real time. The Lab-at-Rig®
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Early Cretaceous glacial environment and paleosurface evolution within the Mount Painter Inlier, northern Flinders Ranges, South Australia Aust. J. Earth Sci. (IF 1.492) Pub Date : 2020-04-15 S. B. Hore; S. M. Hill; N. F. Alley
Abstract Sediments comprising the Radium Ridge Breccia, a stratigraphic unit recognised within the Mesoproterozoic Mount Painter Inlier, are now re-interpreted as Lower Cretaceous (previously interpreted to be Paleozoic) periglacial deposits with associated glacial and pro-glacial facies that extend into adjacent Eromanga Basin sediments. The interpretation is based on distinctive periglacial, glacial
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