Adams et al 2021. Detrital zircon provenance of Permian to Triassic Gondwana sequences, Zealandia and eastern Australia. Supplemental Files SF1 and SF2
Permian Parapara Group and Triassic Topfer Formation are small clastic sedimentary outliers that rest on Cambrian to Devonian basement terranes in the Western Province of South Island, New Zealand. Four new detrital zircon U-Pb age datasets from sandstones in these outliers and four from age-equival...
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| Format: | Dataset |
| Language: | unknown |
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2021
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| Online Access: | https://doi.org/10.6084/m9.figshare.14889078.v1 |
| Summary: | Permian Parapara Group and Triassic Topfer Formation are small clastic sedimentary outliers that rest on Cambrian to Devonian basement terranes in the Western Province of South Island, New Zealand. Four new detrital zircon U-Pb age datasets from sandstones in these outliers and four from age-equivalent eastern Australian sandstones reveal age and provenance information about former Gondwana intracontinental basins. Youngest significant zircon age populations of 264±6, 261±2 Ma (Parapara Group) and 215±2 Ma (Topfer Formation) match fossil ages and indicate broadly syn-depositional igneous activity. The provenance of the igneous detritus was probably the nearby Median Batholith and/or its volcanic equivalents. Zircons in a third Parapara sandstone are mainly Cambrian and Precambrian in age and represent a separate petrofacies with a local Western Province basement terrane provenance. Intra-basin provenance switching between Gondwana margin arc and older basement sources is now documented from Zealandia’s Gondwana basin sequences as well as those from Australia and Antarctica. |
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