Multidisciplinary Studies of the High Arctic Strand Fiord Large Igneous Province

tardunoopp -0241033这是一项基于首席研究员之前的研究成果的更新资助，该研究主要集中在埃尔斯米尔岛北部的几个盆地中保存的晚白垩世火山岩和沉积岩，这些盆地在空间上与斯特兰峡湾大火成岩省（LIP）相关。初步数据表明，这些玄武岩是在33R或更年轻的极性反转时期形成的，不到8300万年前。因此，这些岩石提供了一个理想的机会，可以进一步研究地磁场的演变（通过比较白垩纪正极超时期间和更年轻的高纬度熔岩喷发记录），并了解斯特兰德峡湾LIP的地球动力学意义（特别是关于羽流和非羽流形成模型）。与这些岩石相关的浅海到陆地沉积物也是保存气候敏感化石的理想场所，他们希望继续研究这些化石。建议的工作将支持一名博士生和本科生。每个野外季节通常有四到六名本科生参加野外工作。这些学生中的许多人将继续在实验室分析样本，作为独立研究项目的一部分和作为本科毕业论文的一部分。

ABSTRACT TardunoOPP-0241033This is a renewal grant based on the Principal Investigator's previous findings which focused on Late Cretaceous volcanic and sedimentary rocks, preserved in several basins on north Ellesmere Island that are spatially associated with the Strand Fiord Large Igneous Province (LIP). Preliminary data demonstrate that the basalts were emplaced during reversed polarity chron 33R or younger, less than 83 million years ago. Hence, these rocks provide an ideal opportunity to further examine the evolution of the geomagnetic field (through comparisons of high latitude records from lavas erupted during and younger than the Cretaceous Normal Polarity Superchron), and to understand the geodynamic significance of the Strand Fiord LIP (especially with respect to plume and nonplume models of formation). The shallow marine to terrestrial sediments associated with these rocks is also ideal for preserving climatically sensitivefossils, which they hope to continue to investigate. The proposed work will support a PhD student and undergraduate students. Four to six undergraduates per field season typically take part in the field work. Many of these students will continue analyses of samples in the laboratory as part of independent study projects and as part of undergraduate senior theses.