The Permian-Triassic boundary in wesT ausTralia: evidence from The bonaP ar Te and nor Thern Per Th basins— exPlora Tion imPlica Tions

作者: Eni Australia , Gorter John

DOI:

关键词: PermianOil shaleUnconformityHoveaStage (stratigraphy)PaleontologyStructural basinSedimentary basinGeologyEarly Triassic

摘要: Several sedimentary basins in west Australia contain petroleum reservoirs of Late Permian or older age that are overlain by thick shaly sequences (400–2,000 m) have been assigned an Early Triassic age. The the base shales has been, and continues to be, contentious with strata being variously ascribed latest (Changhsingian Stage) wholly within earliest (Induan Stage). In Perth Basin Permian-Triassic boundary appears be located somewhere Hovea Member Kockatea Shale. Bonaparte Basin, would appear either uppermost Penguin Formation at between Mairmull formations. uncertainty placement relates interpretation sedimentological, biostratigraphic geochemical record individual sections basins. Major problems relate recognition, even presence unconformities, complications related

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