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

南美洲最南端巴塔哥尼亚高原熔岩中发现的地幔和下地壳捕虏体的石油化学研究

• 批准号: 8803958
• 负责人: Charles Stern
• 金额: $ 5.6万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-07-01 至 1991-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8803958&HistoricalAwards=false
• 关键词: Petrochemical; Study; Mantle; Lower; Crustal

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.

这是一个捕虏体的岩石化学研究， 从巴塔哥尼亚的七个不同区域的露头中收集到的 南美洲最南端的高原熔岩。 包体 这些地点包括各种幔源类型。 这将 提供其中六个地点的第一批分析数据， 作为扩展以前发表的结果捕虏体从 第七名。 这项研究的目的是澄清岩浆作用的各个方面， 安第斯山脉大陆岩石圈的性质和演化 型洋-陆汇聚型板块边界环境。 全岩常量、微量元素及同位素分析， 成分矿物将被用来估计的条件 捕虏体的平衡， 南部不同地区的横截面 美国大陆岩石圈的构造。