Detailed Petrological and Geochemical Studies of Abyssal Peridotites

该提案要求提供资金，以支持对大洋钻探计划从赫斯深海（第147段）和Kame断裂带以南的大西洋中脊（第153段）采集的深海橄榄岩进行详细的岩石学和地球化学研究。 在每个钻柱上回收了大量的深海橄榄岩套。 本研究的主要内容是：（1）深海橄榄岩全岩NaxO含量计算值是否普遍高于熔融和熔体渗流模型的预测值？ (2)深海橄榄岩中单斜辉石和尖晶石的局部分布模式是什么？ (3)这些深海橄榄岩中单斜辉石、尖晶石、斜方辉石和橄榄石的微量元素和微量元素丰度是多少？ 大洋中脊的这些微量元素和微量元素之间存在什么样的相关性？ (5)有没有可能更精确地量化熔体-岩石的相互作用，比如赫斯深海中特别发达的例子？

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?