The Ellsworth Mountains Terrane: Its Origin and Accretion to East Antarctica

埃尔斯沃斯山脉地体：其起源和东南极洲的增生

• 批准号: 9220395
• 负责人: Margaret Rees
• 金额: $ 32.9万
• 依托单位: University of Nevada Las Vegas
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-06-01 至 1998-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9220395&HistoricalAwards=false
• 关键词: Ellsworth; Mountains; Terrane; Its; Origin

This award supports an integrated stratigraphic, paleontologic, structural, geochemical, and geochronological study of the Ellsworth Mountains. The purpose of this work is to determine the depositional and tectonic history of this region during late Proterozoic and Paleozoic time. The Ellsworth-Whitmore Mountains block is an important tectonic element within the collage of continental crustal blocks of West Antarctica. This investigation will be accomplished by careful geological mapping and sample collecting for purposes of microstructural kinematic analysis, trace and rare-earth geochemical analysis, and geochronological work. The project will use 40Ar/39Ar and U/Pb isotopic dating methods to define the absolute timing of events. This work will help to constrain tectonic models for an important region of West Antarctica. In particular, a proper understanding of this block is key to evaluating hypotheses about the formation or breakup of supercontinents, such as Rodinia in the Neoproterozoic or Gondwana in the Paleozoic.

该奖项支持综合地层学，古生物学， 构造、地球化学和年代学研究 埃尔斯沃思山脉 这项工作的目的是确定 晚白垩世晚期的沉积和构造历史 元古代和古生代。 埃尔斯沃-惠特莫尔山脉 地块是拼贴构造中的重要构造单元， 南极洲西部的大陆地壳块体。 这次调查 将通过仔细的地质测绘和采样 为了微观结构运动学分析的目的而收集， 微量、稀土元素地球化学分析和年代学 工作 该项目将使用40 Ar/39 Ar和U/Pb同位素测年 方法来定义事件的绝对计时。 这项工作将 有助于约束西部重要地区的构造模型 南极洲 特别是，正确理解这个块是 评估关于形成或分裂的假说的关键 超大陆，例如新元古代的罗迪尼亚大陆或冈瓦纳大陆 在古生代。