Petrochemical Study of Mantle and Lower Crustal Xenoliths Found in the Patagonian Plateau Lavas of Southernmost South America

这是对来自南美洲最南端巴塔哥尼亚高原熔岩的七个不同区域露头的捕虏体进行的岩石化学研究。这些地点的捕虏体包括各种地幔来源的类型。这将提供六个地点的第一批分析数据，并从第七个地点扩展先前公布的捕虏体结果。这项研究的目的是澄清在安第斯类型的大洋-大陆会聚的板块边界环境中的岩浆成因以及大陆岩石圈的性质和演化。将利用全岩和组成矿物的主量元素、痕量元素和同位素分析来估计捕虏体的平衡条件，以便建立南美洲大陆岩石圈不同区域的岩性和热剖面。

This is a petrochemical study of xenoliths which have been collected from seven regionally distinct outcrops of Patagonian plateau lavas of southernmost South America. Xenoliths from these sites include a variety of mantle-derived types. This will provide the first analytical data from six of the sites, as well as extend the previously published results of xenoliths from the seventh. The goal of the study is to clearify aspects of magmagenesis and the nature and evolution of continental lithosphere in an Andean- type oceanic-continental convergent plate-boundary environment. Major and trace element and isotopic analysis of whole-rock and constituent minerals will be used to estimate the conditions of equilibration of the xenoloths so that lithologic and thermal cross-sections through different regions of the southern South American continental lithosphere can be constructed.