Geochemical and Petrological Nature of Volcanism in the Equatorial Atlantic

这是一个继续分析从靠近赤道的中大西洋海脊回收的样品的项目。分析将侧重于对已经分析过铅的同一样品进行微量元素分析和锶和钕同位素分析。数据应深入了解剪切(冷点)和热点对玄武岩的地球化学和岩石学的影响。大洋地壳岩石成因的一个基本问题是了解其化学成分和矿物学的多样性。地幔热柱(热点)和断裂带(冷点)等构造效应被认为起到了作用。席林博士对存在这些影响的部分洋壳中的岩石进行的分析，应该有助于揭示岩浆多样性这一重要问题。

This is a project to continue analyses of samples recovered from the Mid Atlantic Ridge near the equator. Analyses will focus on trace element analyses and Sr and Nd isotopes on the same samples already analyzed for Pb. Data should provide insight into effects of shear (cold spot) and hot spots on the geochemistry and petrology of basalts. %%% A fundamental problem in the petrogenesis of oceanic crustal rocks is understanding the diversity of chemical composition and mineralogy. Tectonic effects such as mantle plumes (hot spots) and fracture zones (cold spots) are thought to play a role. Dr. Schilling's analyses of rocks from parts of the oceanic crust where these effects are present should shed light on the important problem of magmatic diversity.