Detailed Petrological and Geochemical Studies of Abyssal Peridotites

该提案要求资金支持海洋钻探计划从Hess Deep （Leg 147）和Kame断裂带以南的中大西洋山脊（Leg 153）回收的深海橄榄岩的详细岩石学和地球化学研究。在每个钻腿上都回收了大量的深海橄榄岩层。船上科学家的研究构成了本研究的框架，我们建议研究以下关键问题：(1)深海橄榄岩中计算出的全岩纳索含量是否确实高于熔融和熔融渗透模型所预测的？(2)斜辉石和棘石在深海橄榄岩中的局部分布模式是什么？(3)这些深海橄榄岩中斜辉石、脊辉石、正辉石和橄榄石的微量元素和恍惚元素丰度如何？这些微量元素和微量元素在洋中脊中存在怎样的相关性？(5)是否有可能更精确地量化熔体与岩石的相互作用，比如从赫斯深中得到的特别完善的例子？

This proposal requests funds to support detailed petrological and geochemical studies of abyssal peridotites recovered by the Ocean Drilling Program from the Hess Deep (Leg 147) and the Mid-Atlantic Ridge, south of the Kame Fracture Zone (Leg 153). Extensive abyssal peridotite suites recovered on each drilling leg. Studies by shipboard scientists form the framewrok for this study in which we propose to investigate the following key questions: (1) Are the calculated whole-rock NaxO contents inabyssal peridotites conclsively higher than melting and melt percolation models predict? (2) What are the localized distribution patterns of clinopyroxenes and spinals in abyssal peridotites? (3) What are the minor element and trance element abundances of clinopyroxene, spinal, orthopyroxene, and olivine in these abyssal periootites? What correlations exist in these minor and trace elements at mid-ocean ridges? (5) Is it possible to more accurately quantify melt-rock interactions, such as the particularly well developed examples from the Hess Deep?