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Fertile, alkalic intrusions, Karari–Whirling Dervish gold deposit, Yilgarn Craton, Western Australia Aust. J. Earth Sci. (IF 1.2) Pub Date : 2024-03-18 W. K. Witt, M. P. Roberts, S. G. Hagemann, C. Fisher
Some Archean and Phanerozoic gold deposits demonstrate a close spatial relationship with alkalic intrusions, although the genetic connotations of this association are contentious. Only a few of the...
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P–T conditions of metamorphic and hydrothermal events at Tick Hill Gold Deposit, Mount Isa, Queensland, Australia Aust. J. Earth Sci. (IF 1.2) Pub Date : 2024-03-17 T. X. Le, P. H. G. M. Dirks, I. V. Sanislav, J. M. Huizenga, H. A. Cocker, G. T. T. Nguyen
Tick Hill Gold Deposit is a unique gold mineralisation style in the Mary Kathleen Fold Belt in the Mount Isa Inlier. The gold at Tick Hill is generally pure without silver and was formed during two...
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Detrital or reset? 40Ar/39Ar dating of mica from the Lower Jurassic Precipice Sandstone and Evergreen Formation in the Surat Basin Aust. J. Earth Sci. (IF 1.2) Pub Date : 2024-03-14 T. Crossingham, K. Sobczak, A. D. La Croix, J. Esterle, H. Dalton, P. Hayes
The U–Pb detrital zircon record of the Surat Basin, an important part of the Great Australian Superbasin, has already revealed important insights about sediment source terranes. However, owing to t...
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Tectono-stratigraphic evolution in the Paleocene Lishui Sag, East China Sea Shelf Basin Aust. J. Earth Sci. (IF 1.2) Pub Date : 2024-03-11 Z. Zhu, L. Qi, H. Chen, J. Li, Y. Zhang, J. Qin, Y. Zhao, C. Ni
The tectonic evolution of the Lishui Sag in the East China Sea Shelf Basin significantly influences its sequence stratigraphy. By integrating seismic reflections, well logs and core data, this stud...
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Platinum-group-element minerals (‘osmiridium’) from Waratah Bay, Victoria, Australia, and a review of other reported Victorian occurrences Aust. J. Earth Sci. (IF 1.2) Pub Date : 2024-03-05 W. D. Birch
Minerals consisting of the platinum-group elements iridium, osmium and ruthenium (IPGE) are widely dispersed in alluvial deposits derived from ultramafic igneous complexes originating in ophiolite ...
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The Woolamai Granite of Phillip Island: S-, I- or A-type, stock or batholith? Aust. J. Earth Sci. (IF 1.2) Pub Date : 2024-02-22 J. D. Clemens, W. D. Birch
The Woolamai Granite forms the rugged southeastern cape on Phillip Island in Victoria. Another small exposure off the coast, at Pyramid Rock, to the west, suggests that the pluton has batholithic p...
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Mid-Jurassic volcanism at Bokhara River and insights into metasomatism in the lithospheric mantle of the Thomson Orogen, eastern Australia Aust. J. Earth Sci. (IF 1.2) Pub Date : 2024-02-22 J. Shea, S. Foley, H. Dalton, A. Lanati, D. Phillips
Eastern Australia is covered by extensive, thick regolith, which obfuscates much of its basement geology, making geological sampling difficult. The Bokhara River diatremes erupted through the Thoms...
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Mesoproterozoic age for andalusite in the lower Rocky Cape Group, northwest Tasmania Aust. J. Earth Sci. (IF 1.2) Pub Date : 2024-02-21 G. V. Cumming, R. F. Berry, R. S. Bottrill, S. E. Armistead, J. L. Everard, D. J. Bombardeiri, K. Goemann, S. Meffre
New U–Th–Pb chemical data from both electron probe microanalysis and U–Pb laser ablation-inductively coupled plasma mass spectrometry on monazite inclusions in giant andalusite porphyroblasts indic...
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Characteristics and controlling factors of the unconformity-related carbonate reservoir: a case study from Sinian Shuiquan Formation, Tarim Basin, northwestern China Aust. J. Earth Sci. (IF 1.2) Pub Date : 2024-02-21 Y. Cheng, J. Liu, Q. Meng, Y. Yang
Deep-buried marine carbonate reservoirs in the Tarim Basin present challenges for exploration. A regional unconformity in dolomite at the top surface of the Shuiquan Formation makes the carbonate r...
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Evidence for probable temporal and thermal trends among Devonian granitic magmas in central Victoria, and the composition of the Selwyn Block Aust. J. Earth Sci. (IF 1.2) Pub Date : 2024-02-14 J. D. Clemens
This study provides new constraints on the causes of the chemical and isotopic variability in the central Victorian, Devonian, silicic, magmatic rocks and relates these to crustal architecture in t...
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Provenance of the Copi North heavy mineral sands deposit, Murray Basin, Australia, based on the geochronology and geochemistry of detrital zircon, rutile and monazite Aust. J. Earth Sci. (IF 1.2) Pub Date : 2024-02-11 S. Chalmers, D. Zivak, C. Spandler, S. Randle, J. Walsh
The Murray Basin hosts one of the world’s largest strandplain systems and has enormous potential for heavy mineral sand resources of titanium, zircon and rare earth elements. Further discovery of h...
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Paleomagnetism of the Acraman–Bunyeroo meteorite impact ejecta zone in the South Flinders Ranges region, South Australia Aust. J. Earth Sci. (IF 1.2) Pub Date : 2024-02-01 P. W. Schmidt, G. E. Williams
Published in Australian Journal of Earth Sciences: An International Geoscience Journal of the Geological Society of Australia (Vol. 71, No. 3, 2024)
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Assessment of two grainsize methods for peat sediments and their paleoenvironmental significance: the Yueliangwan Peatland in northeast Asia Aust. J. Earth Sci. (IF 1.2) Pub Date : 2024-02-01 L. Wang, M. M. Zhang, Z. J. Bu, S. S. Liu
Grainsize is an important indicator in paleoenvironmental research. Over the past few decades, different pretreatment methods have been proposed for grainsize determination of peat sediments. Asses...
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Formation of the Lawn Hill Impact Structure Aust. J. Earth Sci. (IF 1.2) Pub Date : 2024-01-28 T. Lees, D. O’Donohue
The Ordovician-aged Lawn Hill Impact Structure is perhaps unique among documented craters, in that it is largely filled with slumped, allochthonous Cambrian carbonates partly fluidised by the impac...
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A new discovery of 423.6 Ma Hongbaoshan gabbro in the Beishan area, NW China, and its geological significance Aust. J. Earth Sci. (IF 1.2) Pub Date : 2024-01-20 Y. G. Fu
Published in Australian Journal of Earth Sciences: An International Geoscience Journal of the Geological Society of Australia (Ahead of Print, 2024)
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Basin provenance and its control on mineralisation within the Early Devonian Cobar Basin, western Lachlan Orogen, eastern Australia Aust. J. Earth Sci. (IF 1.2) Pub Date : 2024-01-20 B. Yang, R. Offler, J. A. Fitzherbert, C. Folkes, R. Dwyer, C. Clark
The Cobar Basin, in central New South Wales, is an Early Devonian extensional basin that formed in the western Lachlan Orogen. The basin was filled with shallow- to deep-water sequences of the Coba...
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Allanite geochronology in the Mount Isa Inlier Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-12-21 A. D. Burnham, R. Chandler, Y. Amelin, J. Mavrogenes
New allanite geochronology is presented for four mineral deposits in the Mount Isa Inlier (SWAN, Mary Kathleen, Koppany and Elaine Dorothy). The data indicate the occurrence of multiple phases of a...
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Geology of the Mutis Complex, Miomaffo, West Timor Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-12-21 R. Berry, K. Goemann, L. Danyushevsky, E. Lounejeva
Mesozoic forearc assemblages are widespread across Indonesia, and these are also exposed in the overthrust terranes on Timor. The oldest rocks in the allochthonous Mutis Complex, West Timor are Mes...
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Aspidella and water escape structures from the ca 850 Ma (Tonian) Heavitree Formation, Amadeus Basin, Central Australia Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-12-18 P. S. Plummer, J. D. Gorter
The mid-Tonian-aged Heavitree Formation, the basal unit of the Amadeus Basin succession, has long been believed to be devoid of metazoan fossils. Since a recent review of isolated occurrences of pu...
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Outcrop to petrography scale and new age constraint of the Jatisamit Mélange in the Luk Ulo area, Central Java, Indonesia Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-12-06 M. Z. Tuakia, Rendy, W. D. Santoso, E. Puswanto, F. S. Yuwono, B. Sapiie, A. Dianto
To resolve the formation of the Luk Ulo Mélange in the Karangsambung area of Central Java, the matrix-dominated Jatisamit Mélange, which is a member of the Luk Ulo Mélange, was examined. Outcrop an...
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The Tasmanian Tyennan Domain–a structural synthesis and review with tectonic and dynamic implications for continental margin subduction and exhumation Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-12-06 David Ross Gray, M. J. Vicary, A. W. McNeill
The Tyennan Domain of western Tasmania is a structurally emplaced, complexly deformed lithotectonic sheet (allochthon). It comprises stacked, isoclinally folded slabs of allochthonous high-grade sc...
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Shoshonitic pluton and an associated base-metal deposit in the Tarom–Hashtjin metallogenic zone, NW Iran: implication for tectono-magmatic evolution and metallogenic considerations Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-12-04 M. Afshari, Gh. Nabatian, M. Honarmand, M. Ebrahimi, X-H. Li
Petrological, geochemical and zircon U–Pb and Hf isotope studies were carried out on the Hajseyran pluton, along the Tarom–Hashtjin metallogenic zone, as part of the Alborz–Azerbaijan magmatic belt...
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Discussion of Yule, C.T.G., Daniell, J., Edwards, D.S., Rollet, N. & Roberts, E.M. (2023). Reconciling the onshore/offshore stratigraphy of the Canning Basin and implications for petroleum prospectivity. Australian Journal of Earth Sciences, 70(5), 691–715 Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-11-27 A. J. Mory
Published in Australian Journal of Earth Sciences: An International Geoscience Journal of the Geological Society of Australia (Vol. 70, No. 8, 2023)
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Reply to Discussion of Yule, C. T. G., Daniell, J., Edwards, D. S., Rollet, N., & Roberts, E. M. (2023). Reconciling the onshore/offshore stratigraphy of the Canning Basin and implications for petroleum prospectivity. Australian Journal of Earth Sciences, 70(5), 691–715 Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-11-27 C. T. G. Yule, J. Daniell, D. S. Edwards, N. Rollet, E. M. Roberts
Published in Australian Journal of Earth Sciences: An International Geoscience Journal of the Geological Society of Australia (Vol. 70, No. 8, 2023)
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Paleogene carbonate ramp development in the Kohat Basin of northwestern Pakistan Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-11-29 S. Ahmad, D. Kroon, J. J. G. Reijmer, S. Khan, O. S. Hersi, B. Wadood
A series of well-exposed Paleogene sedimentary successions in the Kohat Basin of northwestern Pakistan (western Himalayas), are used to document the development of Paleogene sedimentary sequence de...
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Subsurface high-grading potential in Coal Seam Gas in eastern Australia Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-11-19 A. J. W. Everts, L. D. Alessio, C. J. Connell
A case study from eastern Australia is used to demonstrate methods for subsurface high-grading and development-concept optimisation in Coal Seam Gas resource plays. We discuss two aspects of subsur...
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Tsunami or storm? A high-level coastal boulder field on the southern tip of Eyre Peninsula, South Australia Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-11-02 R. P. Bourman, C. V. Murray-Wallace, D. Panda, S. Buckman, D. Banerjee, D. D. Ryan, L. T. White
A high-level coastal boulder field at Whalers Way, southern Eyre Peninsula, South Australia, occurs at elevations of 20–30 m above present sea-level on a gently seaward-sloping, karst-weathered cal...
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Geodynamic evolution in the post-collisional stage of the East Kunlun Orogenic Belt: constraints from the Late Triassic intermediate–felsic igneous rocks Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-10-23 A-K. Zhang, S-Y. He, Y. Zhang, J-L. Sun, Y. Qian
The Late Triassic igneous rocks associated with post-collision are widely distributed in the East Kunlun Orogenic Belt (EKOB), but their specific dynamic mechanism and evolutional process are still...
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A revised Proterozoic tectono-stratigraphy of the South Nicholson region, Northern Territory, Australia—insights from SHRIMP U–Pb detrital zircon geochronology Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-10-19 C. J. Carson, N. Kositcin, J. R. Anderson, P. A. Henson
New SHRIMP U–Pb detrital zircon geochronology on Mesoproterozoic and Paleoproterozoic siliciclastic rocks from the South Nicholson region, in concert with recently acquired complementary regional g...
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The critical role of deformation-assisted melt migration in the formation of oceanic core complexes Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-10-09 R. L. Gardner, N. R. Daczko, S. Piazolo
Oceanic core complexes provide an accessible window into deep processes occurring at slow and ultra-slow-spreading mid-ocean ridges. We analyse samples from IODP ocean drilling of core complexes at...
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How thick is the Strathbogie Complex? Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-09-13 D. H. Moore, R. J. Armit
The Strathbogie Complex is a large granitic body in north central Victoria. Previous detailed mapping of part of its western and southern boundary suggested that the body was relatively thin, proba...
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Lithium isotope composition of Ediacaran dolostones from the Nuccaleena and Doushantuo formations Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-08-23 H. L. Taylor, A. Dosseto, J. Farkas, A. Kingston, A. Lorrey, B. Shen
The end of the Cryogenian glaciations undoubtedly affected the chemistry of the Neoproterozoic oceans, with potential consequences for the evolution of life; the duration and extent of this influen...
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The use of structural geology in the mineral exploration industry Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-08-13 B. E. Hobbs
Published in Australian Journal of Earth Sciences: An International Geoscience Journal of the Geological Society of Australia (Vol. 70, No. 7, 2023)
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Variability of syn-rift geometry in Pearl River Mouth Basin, China: implications for faulting patterns in two-phase rift basins Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-08-10 G. R. Peng, P. Liu, B. S. Ma, J. W. Ge
Abstract Recent studies of two-phase non-coaxial analogue experiments and natural rifts suggest that the pre-existing faults that form in the first-phase rift could strongly influence the fault development during a subsequent phase of extension. However, related models from natural examples are still lacking. Here we compare the fault geometry and evolution with different pre-existing fault arrays
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Petrogenesis of the Hoy lava field, a long-lived continental mafic volcanic province in eastern Australia Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-08-09 T. J. Crossingham, T. Ubide, P. M. Vasconcelos, K. M. Knesel
Small-scale continental basaltic fields can erupt with little warning and bring deep undegassed magmas to the surface rapidly. To explore the lifetime, petrogenesis and plumbing system architecture...
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Late Quaternary history of the Gumants catchment, Papua New Guinea Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-08-07 R. Blong
Abstract The Gumants River, rising on the eastern flank of the Mount Hagen stratovolcano, forms part of the headwater catchment of the Wahgi River in the central highlands of Papua New Guinea. The late Quaternary history of the catchment was shaped by a massive debris avalanche with an estimated volume >15 km3 that most likely occurred 400 ± 100 ka. The Upper Gumants River, which occupies about one-quarter
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Formation of Cu–Au porphyry deposits: hydraulic quartz veins, magmatic processes and constraints from chlorine Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-08-03 G. N. Phillips, J. R. Vearncombe, J. D. Clemens, A. Day, A. F. M. Kisters, B. P. Von der Heyden
Abstract Copper–gold porphyry deposits are the world’s main source of copper and a significant source of gold. They consist of vein networks and their surrounding alteration zones. Commonly the deposits are centred on narrow intrusions (stocks), but calling these deposits ‘porphyries’ is unjustified because the name carries little descriptive or genetic value. Extensional veins were formed by hydraulic
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The origin of mafic–ultramafic rocks and felsic plutons along the Clarke River suture zone: implications for porphyry exploration in the northern Tasmanides Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-07-27 A. Edgar, I. Sanislav, P. Dirks
The Clarke River Fault in northeast Queensland records an early Paleozoic history of subduction, accretion and continental suturing. Samples of mafic–ultramafic rocks collected proximal to the Clar...
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Calcareous-nannofossil biostratigraphy of the Miocene Fatha Formation at the Miryas section, Qaradagh Mountain Series, Sulaimaniyah, Kurdistan Region, Iraq Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-07-23 S. O. A. Kharajiany
The middle Miocene Fatha Formation is a prominent cap rock for hydrocarbon accumulations in Iraq’s oil fields. It is widely distributed in the Low Folded Zone but less common in the High Folded Zon...
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Late Holocene drying of Port Phillip Bay: archaeological and cultural perspectives Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-07-20 D. Frankel, D. C. Thomas, R. Kurpiel, C. Spry, J. Tumney, L. Becerra-Valdivia, Bunurong Land Council Aboriginal Corporation
Abstract Evidence from bay floor channelling, seismic surveys and core dating has been used to suggest that Port Phillip Bay dried out for a period between about 2800 and 1000 cal. yr BP as sandbars blocked it off from the sea. This model is now supported by the examination of radiocarbon ages from archaeological excavations of Aboriginal shell middens on the shoreline of the Mornington Peninsula on
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An alternative to the fault-valve model Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-07-17 B. E. Hobbs, A. Ord
Abstract This paper proposes a mechanism called the mode-switching model that is presented as an alternative to the fault-valve model. This mechanism is relevant to open-flow, low-porosity, fluid-saturated systems deforming by pressure solution creep. As opposed to most constitutive models discussed in the geological literature, the yield envelope is capped at high normal stresses, as demonstrated
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The isotope geochemistry of host rocks of the late Archean Guandi and Banshigou banded iron formations, southern Jilin Province: temporal and tectonic significance Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-07-13 J-L. Liu, F-Y. Sun, Y-H Zhou
Abstract The Guandi and Banshigou iron deposits of southern Jilin Province, China, are Algoma-type banded iron formations (BIFs) located in the Eastern Block of the North China Craton (NCC). LA–ICP–MS U–Pb dating shows the magmatic zircons in plagioclase amphibolite from the Guandi BIF (PA–GD) and plagioclase hornblende gneiss from the Banshigou BIF (PHG–BSG) were crystallised at 2556 ± 17 Ma and 2545 ± 27 Ma
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Sedimentary characteristics and controlling factors of a Pliocene shelf-edge delta in the Papuan Basin Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-07-13 Y. Zhu, J. Liu, H. Wang, G. Hong, H. Dong, Z. Chen
Abstract The Pliocene shelf-edge delta (SED) in the Papuan Basin was formed by deposition of the Pliocene Orubadi Formation. On the basis of a comprehensive analysis of seismic, wireline and mud logging, and paleontological data, the stratigraphic framework, depositional system and controlling factors on the SED development were established. The Orubadi Formation includes a parallel unconformity. Internally
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Strong tides during Cryogenian glaciations: tidal rhythmites from early and late Cryogenian glacial successions and interglacial beds, South Australia Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-06-28 G. E. Williams
Abstract Vertically accreted, cyclic tidal rhythmites—laminated, fine-grained sandstones, siltstones and mudstones—occur in the late Cryogenian glaciogenic Elatina Formation (ca 635 Ma) and early Cryogenian Sturt Formation (ca 660 Ma) in the South Flinders Ranges region of the Adelaide Rift Complex within the Adelaide Superbasin, and in Cryogenian strata from Nicholson 2 drill hole in the eastern Officer
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Zircon age distributions and implied tectonic settings of early Cambrian to Early Devonian sedimentation in western and central Victoria Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-06-28 J. D. Clemens
Abstract Age distributions among the detrital zircon populations in western and central Victorian Paleozoic metasedimentary rocks suggest that most were deposited in Andean-type back-arc environments, with variable proportions of arc and continental sediment sources. Notable exceptions are the upper Cambrian Knowsley East Shale and the Silurian(?) sample of ‘Glen Creek Lithic Sandstone’, which both
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Middle–Upper Ordovician conodonts from the Gunningbland area in central New South Wales with implications for regional correlations Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-06-22 Y. Y. Zhen, I. G. Percival, P. M. Smith
Abstract This study documents Middle to Late Ordovician conodont faunas primarily from the Billabong Creek Formation exposed in the Gunningbland area located west of Parkes and northwest of Forbes in central New South Wales. Forty-four identifiable conodont species recovered from 105 limestone samples in this area form the basis of the most complete biostratigraphic succession in shallow-water facies
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Towards quantifying uncertainties in geological models for mineral resource estimation through outside-in deposit-scale structural geological analysis Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-06-19 R. J. Reid, E. J. Cowan
Abstract Mineral Resource downgrades can be prevented by integrating better structural geological interpretations into project evaluations. Geological modelling for Mineral Resource estimation is presented as a systematic process of structural geological analysis at the deposit-scale using drill-sampled grade data. The initial step in this process is to use Maximum Intensity Projection (MIP) rendering
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Function and status of structural geology in the Resource industry Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-06-12 J. R. Vearncombe
Abstract Basic, nuts and bolts structural geology is the unheralded success story central to brownfields exploration that in Australia, and globally, has grown manyfold mineral deposits beyond the start-of-mine Reserve. Since the last (2012) meeting on applied structural geology and Resources, the topic has changed dramatically. Now, structural geology is practised daily and in house by most exploration
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Dinosaur and tree-line invasion of southeastern Australia during Cretaceous greenhouse spikes Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-05-31 G. J. Retallack
Abstract The paleosol record of the Early Cretaceous Wonthaggi and Eumeralla formations of Victoria reveals a suite of non-calcareous Histosols and Ultisols, as well as stump casts, indicative of humid temperate ecosystems. At some stratigraphic levels, frigid temperatures are indicated by clastic dykes (ice wedges), load casts of mud (periglacial convolutions), and coal-mantled stone rolls (aapamires)
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Characterisation of the tensile performance of bonding agents for the restoration of heritage dimension stone from southeast Australia Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-05-25 B. Jones, B. Sainsbury
Abstract Through this research, we measure the direct tensile strength of three important southeast Australian heritage dimension stones and compare the results with published values. The three stones are Sydney Sandstone, Victorian Bluestone and South Australian Black Granite. This information is crucial for stone masons when they are selecting and cutting stone for construction projects, as they
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Orogens and detritus: unravelling the Mesoproterozoic tectonic geography of northern Australia through coupled detrital thermo- and geo-chronometers Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-05-25 B. Yang, A. S. Collins, M. L. Blades, F. Jourdan
Abstract This study presents detrital muscovite 40Ar/39Ar data from the Mesoproterozoic Roper Group and overlying informally named successions, in the Beetaloo Sub-basin, northern Australia. Detrital muscovite chronology reveals tectono-thermal processes within source regions and provides new constraints on the basin provenance, revising previous interpretations based on detrital zircon data. Detrital
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A Pb isotope model for the Proterozoic of northern Australia with a focus on the McArthur Basin Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-05-25 G. R. Carr, G. J. Denton, M. J. Korsch, J. M. Parr, L. A. Wyborn, S-S Sun
Abstract The Pb isotopic composition of mineral exploration samples can be used to help determine their metallogenic association and hence to assess prospectivity in geological provinces where there is an established Pb isotope database. We have developed such a database, available online, and models that relate Pb isotopic signatures to known metallogenic events in Proterozoic terrains in northern
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Triaxial stress and failure modes in hydrothermal mineral systems Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-05-25 T. G. Blenkinsop
Abstract Rock mechanics experiments show that the magnitude of the intermediate principal stress significantly affects rock failure. Since triaxial stress states (no principal stress is zero) are ubiquitous in the crust, and polyaxial axial states (all three principal stresses are different) are general, the magnitude of the intermediate principal stress should have an important effect on hydrothermal
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Geochemical characteristics and structural setting of lithium–caesium–tantalum pegmatites of the Dorchap Dyke Swarm, northeast Victoria, Australia Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-05-25 B. R. Hines, D. Turnbull, L. Ashworth, S. McKnight
Abstract The Dorchap Dyke Swarm hosts the first recorded occurrence of lithium–caesium–tantalum (LCT) pegmatites in Victoria, Australia. Syn-orogenic emplacement of pegmatite dykes occurred along a northwest-trending shear system during the Benambran Orogeny. Pegmatites are derived from fractionated melt associated with the Mount Wills Granite, which is an S-type, peraluminous granite originating from
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The growth and size of orogenic gold systems: probability and dynamical behaviour Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-05-17 A. Ord, B. E. Hobbs
Abstract Every nonlinear system grows by increments, and the final probability distributions for components of that system emerge from an amalgamation of these increments. The resulting probability distribution depends on the constraints imposed on each increment by the physical and chemical processes that produce the system. Hence there is the potential that the observed probability distribution can
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Lithogeochemical and sulfide trace-element systematics across the Permian–Triassic boundary, Perth Basin, Western Australia: constraints on the shallow marine environment during the end-Permian mass extinction Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-05-10 E. Lounejeva, J. A. Steadman, R. R. Large, K. Grice, P. Olin, I. Belousov
Abstract Sedimentary pyrite trace-element composition is an established proxy for determining paleo-ocean geochemistry and atmospheric oxygen concentrations through deep time. However, its applicability over shorter time-scales (i.e. <20 Ma) is not well known. To test this, we targeted fine-grained pyrite in the Hovea Member of the Kockatea Shale (Perth Basin, Western Australia), which encompasses
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The early Ediacaran Brachina sequence, Flinders Ranges, South Australia: its age, formation and plate tectonic setting Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-05-08 P. S. Plummer
Abstract Throughout the Flinders Ranges of South Australia, the red bed Brachina sequence comprises the lower of two regressive, coarsening-upward successions that together constitute the Ediacaran-aged Wilpena Group. Detailed examination of the Brachina sequence has identified evidence of ice-rafting, supporting the contention that frigid climatic conditions continued well after cessation of the Marinoan
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Gold placer characteristics in marine sediments of Bayah, West Java, Indonesia Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-05-08 H. Kurnio, Y. Dahlan, J. Kanily
Abstract Placer gold deposits in marine sediments in Indonesian waters, especially in Bayah southwest of Java Island, Banten Province, have many characteristics. In Bayah coastal waters, gold mostly accumulates in very fine sands and is associated with magnetic minerals. Elsewhere, coarser sand and gravel sediments tend to have higher Au contents. Gold exploitation in marine sediments has begun with
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Israelite Plain, southwestern Australia, a siliciclastic, late Quaternary Coorong analogue, without dolomite Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-04-27 N. P. James, J. D. A. Clarke
Abstract The Israelite Plain, a narrow terrace at the western edge of the Great Australian Bight, is characterised by a series of schizohaline, ephemeral lakes leeward of a marginal marine eolianite dune complex that has many similarities to the Coorong Coastal Plain (CCP). The late Pleistocene and Holocene sediments are a mixture of dominantly quartzose sand and lesser carbonate components. Paleolagoon
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Reconciling the onshore/offshore stratigraphy of the Canning Basin and implications for petroleum prospectivity Aust. J. Earth Sci. (IF 1.2) Pub Date : 2023-04-13 C. T. G. Yule, J. Daniell, D. S. Edwards, N. Rollet, E. M. Roberts
Abstract The Canning Basin is a prospective hydrocarbon frontier basin and is unusual for having limited offshore seismic and well data in comparison with its onshore extent. In this study, seismic mapping was conducted to better resolve the continuity of 13 key stratigraphic units from onshore to offshore to delineate prospective offshore hydrocarbon-bearing units, and better understand the distribution