Paleomagnetism of the Dwyka Series

Dwyka 系列的古地磁学

• 批准号: 9725386
• 负责人: Neil Opdyke
• 金额: --
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-01-01 至 1999-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9725386&HistoricalAwards=false
• 关键词: Paleomagnetism; Dwyka; Series

9725386 Opdyke During the late Paleozoic most of the southern hemisphere continents were joined into a "supercontinent" called Gondwana , that subsequently collided with Europe and Asia to form Pangea, which itself dispursed during the Mesozoic. During the late Carboniferous, Gondwana was still a coherent block, therefore all paleomagnetic poles from rocks of this age should align if the age and magnetic data are robust and the reconstruction of the paleogeography is covert. Recently determined late Carboniferous poles in Australia do not match poles from the same aged sediments in Africa that were determined 30 years ago. This project will restudy these rocks to determine if the age and magnetism data re in error, or if the plate reconstructions of Gondwana are in error. Results are expected to clarify and resolve this perplexing mis-match in these poles, which will read to a more robust reconstruction of Gondwana.

在古生代晚期，南半球的大部分大陆合并成一个叫做冈瓦纳的“超大陆”，随后与欧洲和亚洲碰撞形成泛大陆，在中生代解体。在晚石炭世时期，冈瓦纳仍然是一个相干块体，因此，如果年龄和磁资料可靠，古地理重建不明显，那么该时代岩石的古磁极应该是对齐的。最近在澳大利亚确定的晚石炭纪极点与30年前在非洲确定的同一年代沉积物的极点不匹配。该项目将重新研究这些岩石，以确定年龄和磁性数据是否有误，或者冈瓦纳板块重建是否有误。结果有望澄清和解决这些两极的令人困惑的不匹配，这将有助于更有力地重建冈瓦纳。