Collaborative Research: Constraints on Mesoproterozoic Supercontinent Assembly and Plate Dynamics: Studies on the 1.1 Ga Umkondo Large Igneous Province in Southern Africa

合作研究：中元古代超大陆组装和板块动力学的约束：南部非洲1.1 Ga Umkondo大型火成岩省的研究

• 批准号: 9909269
• 负责人: Richard Hanson
• 金额: $ 16.69万
• 依托单位: Texas Christian University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-01-15 至 2003-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9909269&HistoricalAwards=false
• 关键词: Collaborative; Research; Constraints; Mesoproterozoic; Supercontinent

9909269 Hanson9909854 GoseSupercontinent assembly and dispersal throughout geologic time represent a fundamental theme in earth history. The Phanerozoic assembly and dispersal of Gondwana and Pangea has been extensively studied but was preceded by an earlier supercontinent, Rodinia, which began to assemble at 1300 Ma, possibly incorporating most or all continental crust by 1000 Ma and began to disperse at 750 Ma. This project focuses on a key element in both the Rodinian and Gondwanan supercontinents which involves a large-scale, poorly understood 1.1. Ga within plate igneous province in the Kalahari craton. One interpretation is that the igneous province, and possible correlatives in Antarctica and Laurentia, originated from a large-scale mantle thermal anomaly or plume near one of the main sites of plate convergence during Rodinia assembly. This project will gather geochronological, paleomagnetic and geochemical data required to test the hypothesis that the Umkondo and Laurentian provinces are expressions of a single large-scale magmatic event. Results will help paleogeographic reconstructions of the neoproterzoic and has implications for formation of large igneous provinces in relation to supercontinent evolution in general.

9909269 HANSON9909854 GOSESUPERCONTINED集会和分散地质时代是地球历史上的基本主题。 冈瓦纳和Pangea的Phanerozoic组装和分散已经进行了广泛的研究，但在较早的超大陆Rodinia之前，它开始在1300 MA组装，可能由1000 MA掺入大多数或所有大陆壳，并开始分散在750 MA。 该项目着重于罗丹尼亚人和冈瓦南超强的关键因素，涉及一个大规模的，鲜为人知的1.1。在卡拉哈里·克拉顿（Kalahari Craton）的火成岩省内GA。 一种解释是，南极和劳伦蒂亚的火成岩省以及可能的相关性源自罗迪尼亚装配过程中板块收敛的主要位置之一，源自大规模的地幔热异常或羽状物。 该项目将收集需要测试umkondo和Laurentian省是一个大规模岩浆事件的表达的假设所需的人工类学，古磁和地球化学数据。 结果将有助于对新元植物的古地理重建，并对大型火成岩省的形成与超大陆进化有关。