Jurassic Ferrar Tholeiites: Time of Emplacement, Cause of Young Ages, and Tectonic Implications

侏罗纪费拉拉斑玄武岩：侵位时间、年轻成因及构造意义

• 批准号: 9022603
• 负责人: David Elliot
• 金额: $ 18.86万
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-07-01 至 1995-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9022603&HistoricalAwards=false
• 关键词: Jurassic; Ferrar; Tholeiites; Time; Emplacement

This award supports the study of rocks of Jurassic age (Ferrar Group) which cap the Gondwana sedimentary sequence in Antarctica and are interpreted to be a manifestation of the thermal processes associated with supercontinent breakup. Correlative magmatism is recorded in Australia and southern Africa. The age of crystalization of all these igneous rocks is not well established because of the difficulties in age determination of tholeiites and altered silicic rocks. Recent work on feldspar separates suggests that at least the Ferrar lavas may be older that currently accepted. The results will have implications for: (1) petrogenesis of the Ferrar rocks; (2) age relations of Ferrar magmatic along the Transantarctic Mountains; (3) temporal and spatial relations between magmatic events across southern Africa-Antarctica-Australia associated with Gondwana breakup; (4) the tectonic history of the Transantarctic Mountains.

该奖项支持对侏罗纪时代岩石的研究 （Ferrar Group），覆盖冈瓦纳沉积序列 在南极洲，被解释为是一种表现， 与超大陆有关的热过程 分手。 相关的岩浆活动记录在澳大利亚， 南部非洲. 所有这些的结晶时代 火成岩并没有很好地建立起来，因为 拉斑玄武岩和蚀变岩年龄测定的困难 岩石。 最近对长石分离物的研究表明， 至少费拉尔熔岩可能比现在更古老 接纳的话 研究结果将对以下方面产生影响： (1)费拉岩的岩石成因;（2） 沿着横贯南极山脉的费拉尔岩浆岩; 岩浆事件的时空关系 穿越南部非洲-南极洲-澳大利亚 冈瓦纳断裂;（4） 横贯南极山脉。