RUI: Origin of the Yreka Terrane and the Provenance of Sonomia

RUI：怀里卡地体的起源和索诺米亚的起源

• 批准号: 9417954
• 负责人: Timothy Wallin
• 金额: $ 9.11万
• 依托单位: University of Nevada Las Vegas
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-01-01 至 1997-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9417954&HistoricalAwards=false
• 关键词: RUI; Origin; Yreka; Terrane; Provenance; RUI; Origin; Yreka; Terrane; Provenance

9417954 Wallin The Klamath Mountains have been in their present position since the Permian, however there is considerable controversy about their origin in pre-permian times. Essentially, two hypothesis are current - that theses lower Paleozoic rocks were part of a microplate (Sonomia) that was accreted during Permo-Triassic time or that the Paleozoic euqeoclinal rocks in California (Klamaths) are tectonostragraphically equivalent to coeval rocks in Nevada. This project will utilize the spatial distribution of the age range of Zircons eroded from precambrian rocks along the pacific margin, and the age range of detrital zircons in several formations in the eastern Klamaths to discriminate between these models. Additionally, the work is expected to elucidate the age, provenance and tectonic significance of lower paleozoic siliclastic rocks (Yreka terrane) in the eastern Klamaths.

9417954瓦林（Wallin）自二叠纪以来，克拉马斯山脉一直处于目前的地位，但是关于他们在珀米亚时代的起源有很大的争议。从本质上讲，两个假设是最新的 - 较低的古生代岩石是近三叠纪时间或加利福尼亚州古生代的Euqeoclinal岩石（Klamaths）在碳酸三叠纪期间积聚的微板岩（SONOMIA）的一部分。 该项目将利用从太平洋边缘沿前寒武纪岩石侵蚀的锆石的年龄范围的空间分布，以及东部克拉马斯东部几个地层中的碎屑锆石的年龄范围，以区分这些模型。 此外，预计这项工作将阐明东部克拉马斯的下古生代硅质岩石（Yreka Terrane）的年龄，出处和构造意义。