U-Pb (CA-TIMS) zircon geochronology of the late permian of Australia: Constraining the time scale between two major extinctions

Steven W Denyszyn; Roland Mundil; Ian Metcalfe

doi:10.1016/j.gca.2010.04.029

Abstract

The Bowen and Sydney Basins make up a ca. 600 km long, NNW-trending series of basins in eastern Australia, filled with terrestrial sediments of late Paleozoic to early Mesozoic age. The basins are also important sedimentary archives of evolutionary events in eastern Gondwana during times that are characterized by two major extinctions (end Middle Permian and Permian-Triassic extinctions). We present new U-Pb (CA-TIMS) zircon ages for several tuffs interbedded within the sediments, with the purpose of creating a time scale of the Upper Permian as recorded in eastern Australia that allows correlations with different parts of the world. Currently, these correlations mostly depend on carbon-isotope records as well as biostratigraphy and lithostratigraphy that are deemed unsuitable for constructing high-resolution chronostratigraphic framework in absence of robust and precise radio-isotopic ages. The existing SHRIMP U-Pb ages on zircon have been shown to be compromised by inaccuracy and low precision when compared to what is achievable with the CA-TIMS method.

Original language	English
Pages	A223-A223
DOIs	https://doi.org/10.1016/j.gca.2010.04.029
Publication status	Published - 2010
Event	Goldschmidt 2010: Earth, Energy, and the Environment - Knoxville, United States of America Duration: 13 Jun 2010 → 18 Jun 2010

Conference

Conference	Goldschmidt 2010: Earth, Energy, and the Environment
City	Knoxville, United States of America
Period	13/06/10 → 18/06/10

Keywords

Isotope Geochemistry

Access to Document

10.1016/j.gca.2010.04.029

https://hdl.handle.net/1959.11/8418

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Cite this

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title = "U-Pb (CA-TIMS) zircon geochronology of the late permian of Australia: Constraining the time scale between two major extinctions",

abstract = "The Bowen and Sydney Basins make up a ca. 600 km long, NNW-trending series of basins in eastern Australia, filled with terrestrial sediments of late Paleozoic to early Mesozoic age. The basins are also important sedimentary archives of evolutionary events in eastern Gondwana during times that are characterized by two major extinctions (end Middle Permian and Permian-Triassic extinctions). We present new U-Pb (CA-TIMS) zircon ages for several tuffs interbedded within the sediments, with the purpose of creating a time scale of the Upper Permian as recorded in eastern Australia that allows correlations with different parts of the world. Currently, these correlations mostly depend on carbon-isotope records as well as biostratigraphy and lithostratigraphy that are deemed unsuitable for constructing high-resolution chronostratigraphic framework in absence of robust and precise radio-isotopic ages. The existing SHRIMP U-Pb ages on zircon have been shown to be compromised by inaccuracy and low precision when compared to what is achievable with the CA-TIMS method.",

keywords = "Isotope Geochemistry",

author = "Denyszyn, \{Steven W\} and Roland Mundil and Ian Metcalfe",

year = "2010",

doi = "10.1016/j.gca.2010.04.029",

language = "English",

pages = "A223--A223",

note = "Goldschmidt 2010: Earth, Energy, and the Environment ; Conference date: 13-06-2010 Through 18-06-2010",

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TY - CONF

T1 - U-Pb (CA-TIMS) zircon geochronology of the late permian of Australia

T2 - Goldschmidt 2010: Earth, Energy, and the Environment

AU - Denyszyn, Steven W

AU - Mundil, Roland

AU - Metcalfe, Ian

PY - 2010

Y1 - 2010

N2 - The Bowen and Sydney Basins make up a ca. 600 km long, NNW-trending series of basins in eastern Australia, filled with terrestrial sediments of late Paleozoic to early Mesozoic age. The basins are also important sedimentary archives of evolutionary events in eastern Gondwana during times that are characterized by two major extinctions (end Middle Permian and Permian-Triassic extinctions). We present new U-Pb (CA-TIMS) zircon ages for several tuffs interbedded within the sediments, with the purpose of creating a time scale of the Upper Permian as recorded in eastern Australia that allows correlations with different parts of the world. Currently, these correlations mostly depend on carbon-isotope records as well as biostratigraphy and lithostratigraphy that are deemed unsuitable for constructing high-resolution chronostratigraphic framework in absence of robust and precise radio-isotopic ages. The existing SHRIMP U-Pb ages on zircon have been shown to be compromised by inaccuracy and low precision when compared to what is achievable with the CA-TIMS method.

AB - The Bowen and Sydney Basins make up a ca. 600 km long, NNW-trending series of basins in eastern Australia, filled with terrestrial sediments of late Paleozoic to early Mesozoic age. The basins are also important sedimentary archives of evolutionary events in eastern Gondwana during times that are characterized by two major extinctions (end Middle Permian and Permian-Triassic extinctions). We present new U-Pb (CA-TIMS) zircon ages for several tuffs interbedded within the sediments, with the purpose of creating a time scale of the Upper Permian as recorded in eastern Australia that allows correlations with different parts of the world. Currently, these correlations mostly depend on carbon-isotope records as well as biostratigraphy and lithostratigraphy that are deemed unsuitable for constructing high-resolution chronostratigraphic framework in absence of robust and precise radio-isotopic ages. The existing SHRIMP U-Pb ages on zircon have been shown to be compromised by inaccuracy and low precision when compared to what is achievable with the CA-TIMS method.

KW - Isotope Geochemistry

UR - http://www.goldschmidt2010.org/abstracts/view

U2 - 10.1016/j.gca.2010.04.029

DO - 10.1016/j.gca.2010.04.029

M3 - Abstract

SP - A223-A223

Y2 - 13 June 2010 through 18 June 2010

ER -