Paleolatitudes of the Pacific Plate in the Cretaceous: Comparative Paleomagnetic Investigation on ODP and DSDP Basaltic Cores

PI将调查太平洋板块现有的DSDP和ODP型玄武岩岩芯，以更新这些岩芯的白垩纪古地磁数据。安通爪哇高原玄武岩岩心的最新结果表明，它们与太平洋其他地区的玄武岩岩心是一致的，但又不同。这可能是因为许多太平洋钻孔的短玄武岩岩芯测量得很差，或者根本没有测量到，而PI建议进行新的测量。此外，许多较早的研究是在20多年前进行的，使用的方法不像今天的方法那么详细和有区别。PI将研究来自ODP1184、807、800、802、303-304、289、462、164、166、167、169和170个站点的玄武岩岩芯。如果这些岩心能在大范围内提供一致的结果，那么这项研究将大大有助于澄清关于古地磁行为的各种假说的许多困惑。

The PI will investigate existing DSDP and ODP basalt cores from the Pacific Plate to update the Cretaceous paleomagnetic data from these cores. Recent results from basalt cores from the Ontong Java Plateau show them to be consistent but discrepant from basalt cores from other Pacific locations. This may be because short basalt cores from many Pacific boreholes have been measured poorly or not at all, and the PI proposes to make new measurements. In addition, many older studies are over two decade ago using less detailed and discriminating methodologies than those available today. The PI will study basalt cores from ODP/DSDP Sites 1184, 807, 800, 802, 303-304, 289, 462, 164, 166, 167, 169 and 170. If these cores can provide consistent results over a broad area, then the study will go a long way to clearing up a much of confusion about various hypotheses about paleomagnetic behavior.