Was Laurentia the "Southeast Pacific Continent?"

劳伦西亚是“东南太平洋大陆”吗？

• 批准号: 9418236
• 负责人: Ian Dalziel
• 金额: $ 19.99万
• 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: 1995
• 资助国家: 美国
• 起止时间: 1995-02-01 至 1999-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9418236&HistoricalAwards=false
• 关键词: Was; Laurentia; Southeast; Pacific; Continent

9418236 Dalziel A recent hypothesis that the proto-Appalachian margin of Laurentia rifted from the proto-Andean Margin of South america at the end of the Precambrian, and that the Appalachian and Andean orogens were initially a single mountain system resulting from Paleozoic Laurentia-Gondwana interaction, has many far reaching implications. This project will test this hypothesis principally by geologic and geochronologic study of poorly known but critical basement rocks of the Andean Cordillera in northernmost Chile and a paleomagnetic study of Cambrian, Ordovician, and Silurian Strata of the northwest Argentine Precordillera. Results should increase understanding of the origin and development of the Pacific margin of South America in addition to testing the SWEAT hypothesis.

9418236 Dalziel最近的假设是，Laurentia的原始Appalachian边缘从前寒武纪结束时从南美的原始边缘裂开了，而阿巴拉契亚和安第斯Orogens最初是一个单一的山山系统，这是许多古生代Laurentia-laurentia-gondwana Interaction造成的。 该项目将主要通过地质和地球文学研究来检验这一假设，该假设是对安第斯山脉中最北部智利的安第斯山脉科迪拉尔（Andean Cordillera）的鲜为人知但至关重要的地下室岩石，以及对西北阿根廷阿根廷precordillera的寒武纪，奥多利亚人和志留纪地层的古磁研究。 除了检验汗水假设外，结果还应增加对南美太平洋边缘的起源和发展的理解。