Initiation of Jurassic Ferrar Group Magmatism in North Victoria Land, Antarctica: - stratigraphic age, composition and depositional environment of volcaniclastic and epiclastic sediments of the Exposure Hill and Section Peak Formation, Beacon Supergroup

该项目的重点是对南极洲北维多利亚地Ferrar群洪水玄武岩省的结晶基底和183 Ma老柯克帕特里克熔岩流之间的晚三叠世至早侏罗世时期的表生岩和火山岩进行岩石学、古动物学、古植物学和沉积学调查。第二份进展报告（附后）中总结的结果表明，在岩性单位、地层顺序、生物地层标志和岩浆-湿沉积物相互作用方面有几项新发现。应继续进行沉积学和岩相学研究，以确定表层和火山岩单元的垂直和横向相变化特征，并记录碎屑的来源以及沉积环境的时空发展。古生物学数据可以允许解决所识别的沉积物地层的生物地层年龄。植物群、动物群的生物相分析和含油气层序的岩相分析为沉积环境的解释提供了依据。岩相学和化学调查以及放射性年龄的测定，特别是新确定的谢弗峰组的流纹岩凝灰岩，将允许澄清各种爆炸和喷出的火成岩单位之间的成岩关系。

The project focusses on the petrological, palaeozoological, palaeobotanical and sedimentological investigation of epi- and volcaniclastic rocks of Late Triassic to Lower Jurassic age enclosed between the crystalline basement and the 183 Ma old Kirkpatrick Lava Flows of the Ferrar Group Flood Basalt Province in North Victoria Land, Antarctica. The results summarized in the second progress report (attached) indicate several new findings with respect to lithologic units, stratigraphic order, biostratigraphic markers, and magma-wet sediment interaction. Sedimentological and petrographic studies shall be continued to characterize the vertical and lateral facies variations of the epi- and volcaniclastic units and to document the provenance of the clasts as well as the spatial and temporal development of the depositional environments. The paleontological data may allow to address a biostratigraphic age to the sediment formations identified. Biofacies analyses of floras and faunas together with lithofacies analysis of fossiliferous sequences will provide the data for the interpretation of depositional environments. Petrographic and chemical investigations as well as determinations of radiometric ages especially of the rhyolitic tuffs of the newly identified Shafer Peak Formation will allow to clarify the petrogenetic relationship between the various explosive and effusive igneous units.