Detrital zircon geochronology of the Speewah Group, Kimberley region, Western Australia: evidence for intracratonic development of the Paleoproterozoic Speewah Basin

Ramsay, R.R.; Eves, A.E.; Wingate, Michael T.D.; Fiorentini, Marco L.; Batt, Geoffrey; Rogers, KayLeigh; Gwalani, L.G.; Martin, Sarah K.

doi:10.1080/08120099.2017.1294618

Cited by 7 publications

(9 citation statements)

References 22 publications

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“…(°N) Plong. (°E) A 95 (°) Age (Ma) Reference North Australian Craton Elgee-Pentecost Formations EP 5.4 31.8 3.4 1803–1793 45 , 77 , 78 Lakeview dolerite LD −9.5 131.1 17.4 1147–1135 79 Alcurra dykes and sills ADS 2.8 80.4 8.8 1087–1066 55 Johnny’s Creek Member (Bitter Springs Formation) JC 15.8 83.0 13.5 780–760 56 Walsh Tillite Cap Dolomite WTD 21.5 102.4 13.7 750–700 80 West Australian + Mawson cratons Hamersley Overprint 2 HP2 8.0 338.0 5.0 ~1800 81 Bunger Hills dykes* BHD −11.9 145.5 20.3 1134–1131 This study Bangemall Basin sills BBS 33.8 95.0 8.3 1076–1066 61 Mundine Well dykes MDS 45.3 135.4 4.1 758–752 82 * Rotated to West Australia Craton using the Euler pole 7 at 1.3°N, 37.7°E, rotation = 30.3° . …”

Section: Discussionmentioning

confidence: 99%

First Precambrian palaeomagnetic data from the Mawson Craton (East Antarctica) and tectonic implications

Liu

Pisarevsky

et al. 2018

Sci Rep

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A pilot palaeomagnetic study was conducted on the recently dated with in situ SHRIMP U-Pb method at 1134 ± 9 Ma (U-Pb, zircon and baddeleyite) Bunger Hills dykes of the Mawson Craton (East Antarctica). Of the six dykes sampled, three revealed meaningful results providing the first well-dated Mesoproterozoic palaeopole at 40.5°S, 150.1°E (A95 = 20°) for the Mawson Craton. Discordance between this new pole and two roughly coeval poles from Dronning Maud Land and Coats Land (East Antarctica) demonstrates that these two terranes were not rigidly connected to the Mawson Craton ca. 1134 Ma. Comparison between the new pole and that of the broadly coeval Lakeview dolerite from the North Australian Craton supports the putative ~40° late Neoproterozoic relative rotation between the North Australian Craton and the combined South and West Australian cratons. A mean ca. 1134 Ma pole for the Proto-Australia Craton is calculated by combining our new pole and that of the Lakeview dolerite after restoring the 40° intracontinental rotation. A comparison of this mean pole with the roughly coeval Abitibi dykes pole from Laurentia confirms that the SWEAT reconstruction of Australia and Laurentia was not viable for ca. 1134 Ma.

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Section: Discussionmentioning

confidence: 99%

First Precambrian palaeomagnetic data from the Mawson Craton (East Antarctica) and tectonic implications

Liu

Pisarevsky

et al. 2018

Sci Rep

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“…In the Kimberley region, predominantly siliciclastic metasedimentary rocks of the Speewah Group that host the composite Hart Dolerite sill in this study unconformably overlie the Western Zone of the Lamboo Province. The youngest detrital zircon age component in the Speewah Group from a sample in the Speewah Dome is dated at 1814 ± 10 Ma, and includes a youngest zircon at 1803 ± 12 Ma (1σ) (Ramsay et al, 2017). The youngest SHRIMP U-Pb zircon ages indicate that sedimentation post-dated the Halls Creek Orogeny and implies that the Speewah Basin developed in an intracratonic setting during the later stages of the amalgamation of crustal blocks that formed the northern parts of the Australian continent.…”

Section: Regional Significance Of the Hart-carson Lipmentioning

confidence: 96%

“…The Speewah Group overlies the Western Zone, and contains detrital zircons with a dominant ca. 1860 Ma age component that reflects derivation from the Paperbark Supersuite (Hollis et al, 2014;Ramsay et al, 2017). Zircons in rhyodacitic volcaniclastic beds within the Valentine Siltstone in the middle of the Speewah Group are dated at 1835 ± 3 Ma (Table 1; Sheppard et al, 2012).…”

Section: Regional Geological Settingmentioning

confidence: 99%

“…This age was first correlated with the early stages of the Halls Creek Orogeny and interpreted as an indicator of synvolcanic deposition on the foreland of a back-arc basin (Page and Sun, 1994;Sheppard et al, 2012;Tyler et al, 2012). More recently, detrital zircons from the Tunganary Formation, near the base of the Speewah Group, yielded a detrital zircon age component at 1814 ± 10 Ma, including a youngest zircon at 1803 ± 12 Ma (Table 1; Ramsay et al, 2017). This ca.…”

Section: Regional Geological Settingmentioning

confidence: 99%

“…This ca. 1814 Ma component represents detritus from rocks that crystallised during the later stages of the Halls Creek Orogeny and indicates that the Speewah Group was deposited over the Western Zone of the Lamboo Province in an intracratonic setting after accretion of the Kimberley Craton to the North Australian Craton (Ramsay et al, 2017).…”

Section: Regional Geological Settingmentioning

confidence: 99%

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Geology and geochronology of the Paleoproterozoic Hart Dolerite, Western Australia

Ramsay

Eves

Denyszyn

et al. 2019

Precambrian Research

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The Hart Dolerite is the intrusive component of the Hart-Carson Large Igneous Province, which extends over an area of >160,000 km 2 in the Speewah and Kimberley Basins in the western part of the North Australian Craton. In the core of the Speewah Dome, a ca. 500 m thick composite sill of Hart Dolerite comprising four discrete gabbroic units and two later-stage dyke and sill units of potassic granophyre ,all intruded into metasedimentary rocks of the Speewah Group, which have a maximum depositional age of 1814 ± 10 Ma. Cross-cutting relationships between the intrusive units indicate a younging-upwards sequence. The gabbros locally contain platinumgroup element enrichment and vanadiferous titanomagnetite mineralisation. New ID-TIMS U-Pb geochronology of baddeleyite from gabbro units in the Speewah Dome yield upper-intercept ages (all 2σ) of 1792.7 ± 1.3 Ma and 1791.7 ± 4.1 Ma, complemented by a SHRIMP age of 1792.1 ± 5.9 Ma (2σ) for baddeleyite in a latestage pigeonite vein in Hart Dolerite 120 km south of the Speewah Dome. These results are consistent with regional historical data from late-stage potassic granohyres and a model of rapid emplacement of the Hart Dolerite at 1792.6 ± 1.2 Ma in an intracratonic extensional setting within a few million years of the recently revised maximum age of sedimentation at ca. 1814 Ma. In a global setting, the period around ca. 1793 Ma reports a number of Large Igneous Provinces indicating continental extension, high heat-flow in the mantle and the large-scale generation of mafic melts.

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Non-carbonate Caves: Boulder, Fissure, Piping and Sea

Smith

2023

Cave and Karst Systems of the World

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Detrital zircon geochronology of the Speewah Group, Kimberley region, Western Australia: evidence for intracratonic development of the Paleoproterozoic Speewah Basin

Cited by 7 publications

References 22 publications

First Precambrian palaeomagnetic data from the Mawson Craton (East Antarctica) and tectonic implications

First Precambrian palaeomagnetic data from the Mawson Craton (East Antarctica) and tectonic implications

Geology and geochronology of the Paleoproterozoic Hart Dolerite, Western Australia

Non-carbonate Caves: Boulder, Fissure, Piping and Sea

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