Paleomagnetic Tests of the Vendian-Cambrian True Polar Wander Hypotheses

9814608 Kirschvink最近对全球古地磁数据库的文迪安和寒武纪时间（6亿至5亿年前）的综合导致了一种挑衅性的假设，即真正的极移（TPW）可能发生在这段时间内，以30厘米/年的持续速度-远远超过过去2亿年的速度。 对保存完好的文德-寒武纪岩石进行仔细的古地磁分析，可以为TPW假说提供直接的检验。 该项目将在澳大利亚、魁北克和西伯利亚的适当地质构造中进行这种分析。 这些结果，无论是验证或反驳TPW假说，将有重要的影响，全球地球动力学，以及提高周围的寒武纪动物生命的“爆炸”的构造环境的理解。

9814608Kirschvink Recent syntheses of the global paleomagnetic database for Vendian and Cambrian time (600-500 million years ago) have led to provocative hypotheses that true polar wander (TPW) may have occurred during that interval, at sustained rates of 30 cm/yr--far exceeding those of the last 200 million years. Careful paleomagnetic analyses of well preserved Vendian-Cambrian rocks can provide direct tests of the TPW hypotheses. This project will conduct such analyses among suitable geological formations in Australia, Quebec, and Siberia. The results, whether verifying or disproving the TPW hypotheses, will have important implications for global geodynamics, as well as for improving understanding of the tectonic environment surrounding the Cambrian "explosion" of animal life.