Where in the Siluro-Devonian World was Gondwana?

冈瓦纳大陆位于鲶罗-泥盆纪世界的哪个位置？

• 批准号: 9316414
• 负责人: Robert Butler
• 金额: $ 14.44万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-04-01 至 1997-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9316414&HistoricalAwards=false
• 关键词: Where; Siluro; Devonian; World; was

9316414 Butler Reference paleomagnetic pole positions from cratonic masses are required for reconstruction of past plate positions. Recently acquired data suggests that the paleozoic apparent polar wander path for Gondwana includes a large Mid-Paleozoic loop but the existence of this loop is controversial and the geometry of the path is undetermined. Attendant uncertainties in global positions and motions of Gondwana hamper interpretations of which Paleozoic orogenic events resulted from continent-continent collision; limit the ability to understand paleogeographic origins and subsequent motion history of accreted terranes; and even compromise modeling of climate change during earth history. This project addresses this situation and involves a paleomagnetic investigation of the cratonal mid-Paleozoic sequence of the eastern cordillera in Bolivia. Successful results will help resolve uncertainty in the reference apparent polar wander path for Gondwana. ***

要重建过去的板块位置，需要来自克拉通块体的9316414巴特勒参考古地磁极位置。最近获得的数据表明，冈瓦那的古生代视极移路径包括一个很大的中古生代环路，但这个环路的存在是有争议的，而且路径的几何形状尚不确定。随之而来的冈瓦那全球位置和运动的不确定性阻碍了对哪些古生代造山事件是大陆-大陆碰撞造成的解释；限制了理解增生地体的古地理起源和随后运动历史的能力；甚至损害了对地球历史期间气候变化的模拟。该项目解决了这一问题，并涉及对玻利维亚东部考迪拉的克拉通中古生代克拉通序列进行古地磁调查。成功的结果将有助于解决冈瓦那参考视极地漂移路径的不确定性。***