Continuous convergence along the paleo-Pacific margin of Australia during the Early Paleozoic: Insights from the Running River Metamorphics, NE Queensland

Dirks, H.; Sanislav, Ioan V.; Sharib, A. S. A. A. Abu

doi:10.1016/j.lithos.2021.106343

Cited by 7 publications

(14 citation statements)

References 56 publications

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“…The quartzite, due to its close association with the amphibolite and the lack of any other clastic sediments, was interpreted to represent metamorphosed pelagic sediments (Fig. 6) (24), a premise supported by the Mn-rich composition of garnets from the quartzite, as is characteristic of other examples of subducted oceanic sediments metamorphosed to UHP (25,54). UHP metamorphism within Mn-rich garnet grains further strengthens the interpretation that the amphibolite and the quartzite represented remnant oceanic crust (24) and suggests active subduction and obduction of oceanic crust along the Clarke River Fault at ~472 Ma (Fig.…”

Section: Wilson Cycle Style Tectonics In the Terra Australis Orogenmentioning

confidence: 99%

“…The Ordovician Running River Metamorphics ( Fig. 2 ) are a suite of strongly deformed, amphibolite-facies basement rocks, belonging to the Charters Towers Province and positioned along the Clarke River Fault ( 17 , 24 ). They comprise amphibolite, felsic gneiss, quartzite, migmatite, rare lenses of ultramafic rocks, and the intrusive Falls Creek Tonalite.…”

Section: Introductionmentioning

confidence: 99%

“…They comprise amphibolite, felsic gneiss, quartzite, migmatite, rare lenses of ultramafic rocks, and the intrusive Falls Creek Tonalite. Dirks et al ( 24 ) interpreted the amphibolite as obducted basaltic material, initially formed within an intra-oceanic plate setting, and the ultramafic rocks as lenses of ophiolitic material emplaced during accretion. The amphibolites are faulted against basement felsic gneiss (formerly S-type granite) ( 24 ).…”

Section: Introductionmentioning

confidence: 99%

“…Dirks et al ( 24 ) interpreted the amphibolite as obducted basaltic material, initially formed within an intra-oceanic plate setting, and the ultramafic rocks as lenses of ophiolitic material emplaced during accretion. The amphibolites are faulted against basement felsic gneiss (formerly S-type granite) ( 24 ). Lenses of quartzite, which commonly outcrop as rafts along intrusive margins, have maximum depositional ages of ~472 million years old (Ma) ( 24 ) and are spatially associated with the allochthonous blocks of amphibolite.…”

Section: Introductionmentioning

confidence: 99%

“…The amphibolites are faulted against basement felsic gneiss (formerly S-type granite) ( 24 ). Lenses of quartzite, which commonly outcrop as rafts along intrusive margins, have maximum depositional ages of ~472 million years old (Ma) ( 24 ) and are spatially associated with the allochthonous blocks of amphibolite. The whole sequence has been intruded by the postmetamorphic, 456-Ma Falls Creek Tonalite ( 24 ).…”

Section: Introductionmentioning

confidence: 99%

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Metamorphic diamond from the northeastern margin of Gondwana: Paradigm shifting implications for one of Earth’s largest orogens

et al. 2022

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We describe the first occurrence of diamond-facies ultrahigh pressure metamorphism along the Gondwana-Pacific margin of the Terra Australis Orogen. Metamorphic garnet grains from Ordovician metasediments along the Clarke River Fault in northeastern Queensland contain inclusions of diamond and quartz after coesite, as well as exsolution lamellae of rutile, apatite, amphibole, and silica. These features constrain minimum pressure-temperature conditions to >3.5 gigapascals and ~860°C, although peak pressure conditions may have exceeded 5 gigapascals. On the basis of these data, we interpret the Clarke River Fault to represent a Paleozoic suture zone and at least parts of the Terra Australis Orogen to have formed through classic Wilson cycle processes. The growth of the Terra Australis Orogen during the Paleozoic is largely attributed to accretionary style tectonics. These previously unknown findings indicate that the Terra Australis Orogen was not just a simple accretionary style orogen but rather a complex system with multiple tectonic styles operating in tandem including collisional tectonics.

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Section: Wilson Cycle Style Tectonics In the Terra Australis Orogenmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Metamorphic diamond from the northeastern margin of Gondwana: Paradigm shifting implications for one of Earth’s largest orogens

et al. 2022

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Detrital Zircons From Lower Palaeozoic Metamorphic Complexes and Silurian–Devonian Strata in the South Kitakami Belt, Northeast Japan: Implications for the Northern Extension of the Terra Australis Orogen in Northeast Gondwana

Suzuki,

Kurihara,

Hara

et al. 2024

Geological Journal

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To reconstruct the detailed location of proto‐Japan around northeastern Gondwana during the early Palaeozoic, this article presents detrital zircon U–Pb age spectra for lower Palaeozoic metamorphic complexes and Silurian–Devonian strata from the western margin of the South Kitakami belt in northeast Japan. Psammitic and siliceous schists have youngest age peaks ranging from the Ordovician (479–458 Ma) to early Silurian (ca. 439 Ma). Sandstones have youngest age peaks varying from the early Silurian (ca. 435 Ma) to Late Devonian (370–360 Ma). The U–Pb age spectra exhibit major peaks at 510–500, 480–470, and 450–440 Ma. Excluding the Upper Devonian sandstones, significant age peaks occur at 650–550 and 1300–900 Ma. These data can be interpreted as a Pacific Gondwana signature, indicating a tectonic association with the Terra Australis Orogen that developed along the northeastern Gondwanan margin and Paleo‐Pacific Ocean, extending from eastern Australia (i.e., the Thomson, Lachlan, and Delamerian orogens) to Antarctica (i.e., the Ross Orogen). In northeast Asia, the Pacific Gondwana detrital zircons and 480–470 Ma zircons occur in the Bainaimiao arc belt along the northern margin of the North China Craton and in the Jiangyu continental arc in the Jilin area. The magmatic arcs of proto‐Japan and these regions were part of the Terra Australis Orogen during the Ordovician–early Silurian. A decrease in the proportion of Pacific Gondwana detrital zircons in Upper Devonian strata may be due to multistage trench retreat, such as that recognized in the Tasmanides in eastern Australia, which corresponds to the northern Terra Australis Orogen.

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Genesis of copper mineralization in the polymetallic tin deposits from the Herberton Mineral Field, Queensland, Australia

Kumar,

Sanislav,

Martin

et al. 2023

Miner Deposita

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The Herberton Mineral Field hosts multiple small-scale, polymetallic Sn-Cu and Sn-Zn deposits. The Baal Gammon and Isabel polymetallic deposits in the Herberton Mineral Field contain early Sn that is overprinted by sulfides. At Baal Gammon, the sulfide overprinting is Cu-In-rich, whereas Isabel is a Zn-Pb-In-rich system. These deposits are hosted in the meta-sedimentary rocks of the Hodgkinson Formation and the porphyry dikes and volcanic rocks of the Kennedy Igneous Association. Primary Sn in these deposits occurs as cassiterite, which was altered to stannite during sulfide mineralization. The sulfide ores from Baal Gammon consist of chalcopyrite, pyrrhotite, and minor sphalerite, and sphalerite, galena, and minor chalcopyrite are observed at Isabel. Chalcopyrite from Baal Gammon contains on average 609 ppm Ag, 1194 ppm In, and 1410 ppm Sn, whereas chalcopyrite from the Isabel deposit contains on average 2302 ppm Ag, 725 ppm In, and 1042 ppm Sn. Sulfur isotope (δ34S) measurements of in-situ chalcopyrite-pyrrhotite mineral pairs show limited variation and low values that are indicative of a magmatic sulfur source with limited interaction with sulfur from connate and meteoric fluids during mineralization. The chalcopyrite and pyrrhotite δ34S values at the Baal Gammon deposit vary between 0.99–1.91‰ and 1.35–2.48‰, respectively. The δ34S values at the Isabel deposit vary between 0.91–1.45‰ for chalcopyrite and 1.12–2.11‰ for pyrrhotite. The trace element composition of major sulfides and sulfur isotopes of chalcopyrite and pyrrhotite combined with thermodynamic modeling indicates that the mineralizing fluids at the Baal Gammon and Isabel deposits have an igneous source, where the metals were transported as metal-chloride complexes at low pH (< 5) and below ~ 300 °C. The source of these sulfide-rich mineralizing fluids is most likely derived from the magmatic activity associated with the emplacement of the Slaughter Yard Creek Volcanics during a period of crustal thinning between 300 and 280 Ma.

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Continuous convergence along the paleo-Pacific margin of Australia during the Early Paleozoic: Insights from the Running River Metamorphics, NE Queensland

Cited by 7 publications

References 56 publications

Metamorphic diamond from the northeastern margin of Gondwana: Paradigm shifting implications for one of Earth’s largest orogens

Metamorphic diamond from the northeastern margin of Gondwana: Paradigm shifting implications for one of Earth’s largest orogens

Detrital Zircons From Lower Palaeozoic Metamorphic Complexes and Silurian–Devonian Strata in the South Kitakami Belt, Northeast Japan: Implications for the Northern Extension of the Terra Australis Orogen in Northeast Gondwana

Genesis of copper mineralization in the polymetallic tin deposits from the Herberton Mineral Field, Queensland, Australia

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