SHRIMP U-Pb isotopic results, GSWA Harvey 1, Western Australia

This Record contains nine detrital zircon U-Pb geochronological datasets (outlined in Table 1.1) obtained via Sensitive High-Resolution Ion Microprobe (SHRIMP) from nine sedimentary samples obtained from the Geological Survey of Western Australia (GSWA) Harvey 1 well. Analysis was supported by the GSWA and Royalties for Regions Exploration Incentive Scheme (EIS). GSWA Harvey 1 was drilled in the southern onshore Perth Basin, Western Australia, on the ‘Harvey Ridge’ structural feature (Millar and Reeve, 2014). The aim of the study was to provide insights into the potential provenance of sedimentary rocks of the southern Perth Basin.

This record provides detailed results for each sample individually, including a description of the target mineral for geochronology, the relevant analytical data and a brief geochronological interpretation.

The Leederville Formation sample has a 238U/206Pb maximum depositional age of 134 ± 3 Ma (2σ), which is consistent with the Early Cretaceous (Hauterivian–Aptian), biostratigraphically determined depositional age.

Three Eneabba Formation samples yield individual 238U/206Pb maximum depositional ages, from shallowest to deepest, of 514 ± 15 Ma (2σ), 515 ± 11 Ma (2σ), and 505 ± 23 Ma (2σ), respectively. These ages are considerably older than the biostratigraphically determined Early Jurassic depositional age.

Four Lesueur Sandstone samples yield individual 238U/206Pb maximum depositional ages, from shallowest to deepest, of 517 ± 14 Ma (2σ), 527 ± 9 Ma (2σ), 513 ± 24 Ma (95% confidence), and 513 ± 14 Ma (2σ), respectively. These ages are considerably older than the biostratigraphically determined Late Triassic depositional age.

The single Sabina Sandstone sample has a 238U/206Pb maximum depositional age of 537 ± 9 Ma (2σ), which is considerably older than the biostratigraphically determined Early Triassic depositional age.

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Date (Creation)
2015-01-01T00:00:00
Date (Publication)
2017-12-13T22:38:04
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Geoscience Australia Persistent Identifier/http://pid.geoscience.gov.au/dataset/82980

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Digital Object Identifier/http://dx.doi.org/10.11636/Record.2017.020

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Lewis, C.J.

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Commonwealth of Australia (Geoscience Australia)
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Government of Western Australia (Department of Mines and Petroleum)
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Commonwealth of Australia (Geoscience Australia)

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2018-11-01T00:00:00
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Lewis, C.J.

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2018-04-20T05:50:47
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2015-02-05T00:00:00

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