Truncation of Antler and Sonoma Orogenic Belts: Tectonic Significance of Prebatholithic Structural Breaks, Eastern Sierra Nevada, California

鹿角和索诺玛造山带的截断：加利福尼亚州内华达山脉东部的石器时代前结构断裂的构造意义

• 批准号: 8707312
• 负责人: Richard Schweickert
• 金额: $ 10.5万
• 依托单位: Board of Regents, NSHE, obo University of Nevada, Reno
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-07-15 至 1989-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8707312&HistoricalAwards=false
• 关键词: Truncation; Antler; Sonoma; Orogenic; Belts

The Sierra Nevada batholith in eastern California may conceal major sinistral or dextral faults that truncate older structural trends. Within the batholith are several pendants of metamorphic rocks that extend across several intrabatholithic breaks inferred from strontium isotopic data. This project will examine these rocks to determine their structure, stratigraphy and U-Pb geochronology in order to test whether there are structural breaks that coincide with the isotopic changes in the batholith. Results will bear on major problems in the reconstruction of the southwestern United States during the Mesozoic.

位于加州东部的内华达州山脉可能隐藏着 截断旧构造趋势的左旋或右旋断层。 在岩基内有几个变质岩的悬垂物， 延伸穿过几处岩基内断裂 同位素数据 该项目将检查这些岩石，以确定其 构造、地层学和U-Pb年代学，以检验 存在着与同位素变化相一致的结构断裂， 岩基 结果将影响到主要问题， 中生代美国西南部的重建。