Collaborative Research: Geology and U-Pb Geochronology of West Laurentian Piercing Points: Database for Rodinia Restorations and Cordilleran Miogeocline Evolution

在Rodinia超大陆分裂后，沿着Laurentia西缘截断了几个前寒武纪的岩石构造组合，但目前的数据过于稀疏，无法明确地确定匹配的大陆块体，西伯利亚地台、南极洲和澳大利亚可能是匹配的。该项目旨在加强美国西北部选定地点的地质年代学、岩石学和构造数据，以缩小可能的匹配范围。结合现有的和新的来自其他大陆块体的类似数据，这些结果有望澄清Rodinia的性质以及大陆分裂后Rodinia碎片的后续演化。

0107088 Chamberlain0107024 Sears0107107 DoughtyUpon the breakup of the supercontinent Rodinia, several Precambrian lithotectonic assemblages were truncated along the western margin of Laurentia, but present data are too sparse to unambiguously identify the matching continental blocks, and the Siberian platform, Antarctica and Australia are possible matches. This project is aimed at strengthening the geochronologic, petrographic and structural data for selected sites in northwest US in order to narrow the possible matches. Results, combined with existing and new similar data from other continental blocks are expected to clarify the nature of Rodinia and the subsequent evolution of the fragments of Rodinia after continental breakup.