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

南极洲北维多利亚地区侏罗纪费拉尔群岩浆作用的起始： - 暴露山和段峰组、灯塔超群的火山碎屑和碎屑沉积物的地层年龄、成分和沉积环境

• 批准号: 5456743
• 负责人: Professor Dr. Reinhard Gaupp
• 金额: --
• 依托单位: Institut für Geowissenschaften
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5456743?language=en
• 关键词: Initiation; Jurassic; Ferrar; Group; Magmatism

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.

该项目的重点是对南极洲北维多利亚地费拉尔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封闭的晚三叠世至下侏罗世的表层和火山碎屑岩进行岩石学、古动物学、古植物学和沉积学调查。第二份进度报告（附后）中总结的结果表明了有关岩性单元、地层顺序、生物地层标记和岩浆-湿沉积物相互作用的一些新发现。应继续进行沉积学和岩相研究，以表征表层和火山碎屑单元的垂直和横向相变化，并记录碎屑的来源以及沉积环境的时空发展。古生物学数据可以确定所识别的沉积物地层的生物地层年龄。动植物群的生物相分析以及含化石序列的岩相分析将为沉积环境的解释提供数据。岩相学和化学研究以及辐射年龄的测定，特别是新发现的谢弗峰地层的流纹质凝灰岩的测定，将有助于澄清各种爆炸性和喷发性火成岩单元之间的岩石成因关系。