Collaborative Research: Petrology, Geochemistry, and Age ofAccreted Oceanic Crust in the Northern California Coast Ranges

合作研究：北加州海岸山脉的岩石学、地球化学和增生洋壳的年龄

• 批准号: 9018721
• 负责人: John Shervais
• 金额: $ 7.6万
• 依托单位: University of South Carolina at Columbia
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-02-15 至 1993-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9018721&HistoricalAwards=false
• 关键词: Collaborative; Research; Petrology; Geochemistry; Age

The principal investigator, in collaboration with David Kimbrough and Barry Hanan at San Diego State University, will continue his study of the northern Coast Range ophiolite in California. Field relations, uranium-lead and argon-argon dating techniques, petrology, and geochemistry will be used in the Elder Creek area to constrain the origin and time of intrusion of several different magma series, the relationships between each magma series and between plutonic and extrusive suites, and the tectonic history of this ophiolite in relation to other adjacent units. The same techniques will be employed in the Stonyford area to understand its age, origin, and tectonic history. The research will shed new light on the geologic history of this complex plate boundary.

首席研究员将与圣地亚哥州立大学的David Kimbrough和Barry Hanan合作，继续对加州北部海岸山脉的蛇绿岩进行研究。利用野外关系、铀铅测年、氩氩测年技术、岩石学和地球化学等方法，对Elder Creek地区几个不同岩浆系列的起源和侵入时间、各岩浆系列之间的关系、深部岩浆套件和挤压岩浆套件之间的关系进行了研究。并将该蛇绿岩的构造历史与其他相邻单元进行对比。同样的技术将被用于斯通福德地区，以了解它的年龄、起源和构造历史。这项研究将为这一复杂板块边界的地质历史提供新的线索。