Sources and Cycling of Sulfur in Subduction Zones: The Geochemistry of Sulfur in the Mariana Island Arc, Trench andTrough

俯冲带中硫的来源和循环：马里亚纳岛弧、海沟和海槽中硫的地球化学

• 批准号: 8816878
• 负责人: Jeffrey Alt
• 金额: $ 4.83万
• 依托单位: Washington University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-01-15 至 1989-10-25
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8816878&HistoricalAwards=false
• 关键词: Sources; Cycling; Sulfur; Subduction; Zones

This is a project to determine the sulfide petrology, sulfur contents, and sulfur isotopic compositions of well documented fresh submarine glasses and rocks form the Mariana Arc and back arc trough. The goal is to evaluate the sources and sinks of sulfur in these rocks in order to investigate role of subducted oceanic lithosphere and hydrothermally altered fore arc rocks in the generation of back arc basin magmas. These data will also be useful for understanding the sources of sulfur in massive sulfide ore deposits formed in back arc settings. %%% A primary goal in petrogenesis is to understand the source materials of magmas that are produced in various settings. One important setting in the ocean crust is the back arc basin. Back arc basin magmas are thought to be derived from mixing of two different mantle sources. Because the suggested sources have different sulfur isotopic compositions, their analysis in the rocks from the Mariana Arc and back arc trough will provide fundamental new data to help sort out the sources of back arc basin magmas. A study of the sulfide petrology will help to determine the fate of sulfur in back arc basin magmas.

这是一个项目，以确定硫化物岩石学，硫 含量和硫同位素组成 新鲜的海底玻璃和岩石形成了马里亚纳弧和背部 弧槽 目标是评估 硫在这些岩石中，以研究俯冲的作用 大洋岩石圈和热液蚀变弧前岩石 弧后盆地岩浆的生成。这些数据也将 有助于了解块状硫化物中硫的来源 矿床形成于弧后环境。 %%% 岩石成因的一个主要目标是了解其来源 在不同环境中产生的岩浆的物质。 一 弧后盆地是大洋地壳的重要背景。 回来 弧盆岩浆被认为是来自于两种物质的混合， 不同的地幔来源。 因为建议的来源有 不同硫同位素组成， 马里亚纳弧和弧后槽的岩石将提供 基本的新数据，以帮助整理的来源，回弧 盆地岩浆硫化物岩石学的研究将有助于 决定弧后盆地岩浆中硫的命运。