Geologic Studies in the Shackleton Range Coats Land, and Dronning Maud Land, East Antarctica: A North American Connection

南极洲东部沙克尔顿山脉科茨地和德隆宁莫德地的地质研究：与北美的联系

• 批准号: 9117996
• 负责人: Ian Dalziel
• 金额: $ 66.96万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-06-01 至 1998-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9117996&HistoricalAwards=false
• 关键词: Geologic; Studies; Shackleton; Range; Coats

It has been suggested that the Pacific margins of the East Antarctic and North American Precambrian cratons were formerly juxtaposed, and that they drifted apart to initiate the Pacific Ocean during the fragmentation of a Neoproterozoic supercontinent. The most critical and immediate testable evidence put forward in support of this hypothesis is the apparent continuation of the northwestern boundary of the Grenville orogen of the North American craton, the Grenville front, into East Antarctica at the head of the Weddell Sea between the Shackleton Range and Coasts Land, an area seldom visited and never studied in detail by American geologists. This award supports an initial test of the hypothesis, a geologic, geochemical, geochronometric, and paleomagnetic study of the Antarctic rocks in question, in order to compare them with those adjacent to the Grenville front in the southwestern United States. The work will include detailed stratigraphic study of the only undisturbed Neoproterozoic sedimentary sequence in the Antarctic continent.

有人认为，东太平洋边缘 南极和北美的前寒武纪化石 他们互相倾轧，互相倾轧， 新元古代断裂时期的太平洋 超级大陆 最关键和最直接的测试 支持这一假设的证据是 西北边界的明显延续 北美克拉通的格伦维尔造山带，格伦维尔 在南极洲东部威德尔海的顶端 在沙克尔顿山脉和海岸地带之间， 美国地质学家从未详细研究过。 该奖项支持对假设的初步测试， 地质、地球化学、地质年代学和古地磁学 研究南极洲的岩石，以比较 他们与那些毗邻格伦维尔前线的人在一起。 美国西南部。 工作将包括详细的 唯一未受干扰的新元古代地层研究 南极大陆的沉积序列。