A tale of two basins? Stratigraphy and detrital zircon provenance of the Palaeoproterozoic Turee Creek and Horseshoe basins of Western Australia

Bryan Krapež, Stefan G. Müller, Ian R. Fletcher, Birger Rasmussen

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The 2445–2010 Ma tectonic evolution of the southwestern Pilbara Craton is recorded by two depositional basins, but considering the time span involved it is pertinent to question whether only two are preserved and others have vanished. The first, the Turee Creek Basin, developed conformably on an ∼2450 Ma back-arc volcanic province, and was closed long before ∼2208 Ma. It was a retroarc basin sited in front of a magmatic fold-thrust belt on the southwestern margin of the craton. Its folded strata were intruded by ∼2208 Ma dolerite sills that are the preserved rock record of a large igneous province. The basin and dolerites were deformed by the N-verging ∼2195–2145 Ma Ophthalmia Fold-Thrust Belt. The second, the Horseshoe Basin, formed at ≤2050 Ma, unconformably truncating folded strata of the Turee Creek Basin and the ∼2208 Ma dolerites, and was closed prior to intrusion of ∼2008 Ma dolerite dykes. It was an intracontinental rift basin sited on the inverted fold-thrust belt. Detrital zircon age-spectra for the basins have poor fit to the zircon age-spectrum of the Pilbara, and differ significantly in their youngest modes. The youngest mode for the Turee Creek Basin is ∼2442 Ma, whereas the youngest mode for the Horseshoe Basin decreases upwards from ∼2276 Ma to ∼2206 Ma. Although differing in youngest detrital zircon age-modes, zircon age-spectra of the basins are otherwise similar, and broadly match the Glenburgh Terrane on the southwestern margin of the craton. While Turee Creek sediments were derived from the southwest, Horseshoe sediments were derived from the north and northeast. This conundrum is resolved by the Ophthalmia Fold-Thrust Belt, which tectonically loaded the craton to the north and northeast to form a now-vanished Ophthalmia foreland basin that derived sediment from the south and southwest, thereby emplacing zircon with an exotic age-spectrum on the North Pilbara. Inversion of tectonic elements occurred during formation of the Horseshoe Basin, with the fold-thrust belt subsiding beneath the rift while the foreland basin was uplifted. Recycling of the foreland basin inverted its detrital zircon age-spectrum, explaining why the youngest detrital zircon age-mode of the Horseshoe Basin decreases in age upwards.�© 2017 Elsevier B.V

Original languageEnglish
Pages (from-to)67-90
Number of pages24
JournalPrecambrian Research
Volume294
DOIs
Publication statusPublished - 1 Jun 2017
Externally publishedYes

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Stratigraphy
provenance
zircon
stratigraphy
basin
Sediments
diabase
Tectonics
thrust
craton
fold
foreland basin
creek
Recycling
sediment
Rocks
large igneous province
tectonic evolution
sill
island arc

Cite this

@article{fcdb21ea9e9f44b4bf07b727cfd7d5a8,
title = "A tale of two basins? Stratigraphy and detrital zircon provenance of the Palaeoproterozoic Turee Creek and Horseshoe basins of Western Australia",
abstract = "The 2445–2010 Ma tectonic evolution of the southwestern Pilbara Craton is recorded by two depositional basins, but considering the time span involved it is pertinent to question whether only two are preserved and others have vanished. The first, the Turee Creek Basin, developed conformably on an ∼2450 Ma back-arc volcanic province, and was closed long before ∼2208 Ma. It was a retroarc basin sited in front of a magmatic fold-thrust belt on the southwestern margin of the craton. Its folded strata were intruded by ∼2208 Ma dolerite sills that are the preserved rock record of a large igneous province. The basin and dolerites were deformed by the N-verging ∼2195–2145 Ma Ophthalmia Fold-Thrust Belt. The second, the Horseshoe Basin, formed at ≤2050 Ma, unconformably truncating folded strata of the Turee Creek Basin and the ∼2208 Ma dolerites, and was closed prior to intrusion of ∼2008 Ma dolerite dykes. It was an intracontinental rift basin sited on the inverted fold-thrust belt. Detrital zircon age-spectra for the basins have poor fit to the zircon age-spectrum of the Pilbara, and differ significantly in their youngest modes. The youngest mode for the Turee Creek Basin is ∼2442 Ma, whereas the youngest mode for the Horseshoe Basin decreases upwards from ∼2276 Ma to ∼2206 Ma. Although differing in youngest detrital zircon age-modes, zircon age-spectra of the basins are otherwise similar, and broadly match the Glenburgh Terrane on the southwestern margin of the craton. While Turee Creek sediments were derived from the southwest, Horseshoe sediments were derived from the north and northeast. This conundrum is resolved by the Ophthalmia Fold-Thrust Belt, which tectonically loaded the craton to the north and northeast to form a now-vanished Ophthalmia foreland basin that derived sediment from the south and southwest, thereby emplacing zircon with an exotic age-spectrum on the North Pilbara. Inversion of tectonic elements occurred during formation of the Horseshoe Basin, with the fold-thrust belt subsiding beneath the rift while the foreland basin was uplifted. Recycling of the foreland basin inverted its detrital zircon age-spectrum, explaining why the youngest detrital zircon age-mode of the Horseshoe Basin decreases in age upwards.�{\circledC} 2017 Elsevier B.V",
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author = "Bryan Krapež and M{\"u}ller, {Stefan G.} and Fletcher, {Ian R.} and Birger Rasmussen",
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A tale of two basins? Stratigraphy and detrital zircon provenance of the Palaeoproterozoic Turee Creek and Horseshoe basins of Western Australia. / Krapež, Bryan; Müller, Stefan G.; Fletcher, Ian R.; Rasmussen, Birger.

In: Precambrian Research, Vol. 294, 01.06.2017, p. 67-90.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A tale of two basins? Stratigraphy and detrital zircon provenance of the Palaeoproterozoic Turee Creek and Horseshoe basins of Western Australia

AU - Krapež, Bryan

AU - Müller, Stefan G.

AU - Fletcher, Ian R.

AU - Rasmussen, Birger

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AB - The 2445–2010 Ma tectonic evolution of the southwestern Pilbara Craton is recorded by two depositional basins, but considering the time span involved it is pertinent to question whether only two are preserved and others have vanished. The first, the Turee Creek Basin, developed conformably on an ∼2450 Ma back-arc volcanic province, and was closed long before ∼2208 Ma. It was a retroarc basin sited in front of a magmatic fold-thrust belt on the southwestern margin of the craton. Its folded strata were intruded by ∼2208 Ma dolerite sills that are the preserved rock record of a large igneous province. The basin and dolerites were deformed by the N-verging ∼2195–2145 Ma Ophthalmia Fold-Thrust Belt. The second, the Horseshoe Basin, formed at ≤2050 Ma, unconformably truncating folded strata of the Turee Creek Basin and the ∼2208 Ma dolerites, and was closed prior to intrusion of ∼2008 Ma dolerite dykes. It was an intracontinental rift basin sited on the inverted fold-thrust belt. Detrital zircon age-spectra for the basins have poor fit to the zircon age-spectrum of the Pilbara, and differ significantly in their youngest modes. The youngest mode for the Turee Creek Basin is ∼2442 Ma, whereas the youngest mode for the Horseshoe Basin decreases upwards from ∼2276 Ma to ∼2206 Ma. Although differing in youngest detrital zircon age-modes, zircon age-spectra of the basins are otherwise similar, and broadly match the Glenburgh Terrane on the southwestern margin of the craton. While Turee Creek sediments were derived from the southwest, Horseshoe sediments were derived from the north and northeast. This conundrum is resolved by the Ophthalmia Fold-Thrust Belt, which tectonically loaded the craton to the north and northeast to form a now-vanished Ophthalmia foreland basin that derived sediment from the south and southwest, thereby emplacing zircon with an exotic age-spectrum on the North Pilbara. Inversion of tectonic elements occurred during formation of the Horseshoe Basin, with the fold-thrust belt subsiding beneath the rift while the foreland basin was uplifted. Recycling of the foreland basin inverted its detrital zircon age-spectrum, explaining why the youngest detrital zircon age-mode of the Horseshoe Basin decreases in age upwards.�© 2017 Elsevier B.V

KW - Beasley River Quartzite

KW - Paleoproterozoic

KW - Stratigraphy

KW - Turee Creek Group

KW - Western Australia

KW - Zircon provenance

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ER -