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Shoo Fly Complex: Continuing Research on the Most Extensive Belt of Lower Paleozoic Rocks in California

Shoo Fly Complex：对加州最广泛的下古生界岩石带的持续研究

基本信息

批准号：
8902382
负责人：
Gary Girty
金额：
$ 3.33万
依托单位：
San Diego State University Foundation
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：
1989-06-01 至 1991-11-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=8902382&HistoricalAwards=false
关键词：
Shoo Fly Complex Continuing Research

项目摘要

The Shoo Fly Complex, northern Sierra Nevada, California has been subdivided into, from structurally lowest to structurally highest, (1) the Lang-Halsted sequence, (2) the Duncan Peak chert, (3) the Culbertson Lake allochthon and (4) the Sierra City melange. Northeast-dipping thrust faults bound each structural slice, and stratigraphic patterns in the Culbertson Lake allochthon suggest that at least parts of the Shoo Fly Complex form an imbricate structure that formed in a Paleozoic accretionary complex. If this hypothesis is correct and can be expanded to include other units in the Shoo Fly Complex, then each fault-bounded slice contains information about how the accretionary complex evolved. We will undertake a two-year program to investigate the age(s) of chert units throughout the Shoo Fly Complex, and the stratigraphic, petrologic, sedimentologic, and structural characteristics of the Lang- Halsted sequence. Data generated by work proposed here will allow for a comprehensive terrane analysis of a complete cross- sectional portion of the Shoo Fly Complex, and will add significantly to our understanding of the most extensive belt of lower Paleozoic rocks in California. The results could have a major impact on the distribution of aboriginal North American crust and exotic or suspect crustal elements.

位于加州内华达州北方谢拉的Shoo Fly综合体从结构上最低层到结构上最高峰，（1）Lang-Halsted序列，（2）邓肯峰硅质岩，（3）卡伯特森湖外来岩和（4）塞拉城美琅脂北东向的逆冲断层将每个构造卡伯特森湖的切片和地层模式外来体表明至少部分的Shoo Fly复合体形成了一个古生代的叠瓦状构造增生杂岩如果这个假设是正确的，扩大到包括其他单位在Shoo Fly复杂，然后每个有故障边界的切片包含关于加积复合体演化。我们将开展为期两年的计划调查的年龄（S）的燧石单位在整个 Shoo Fly复合体，以及地层，岩石，沉积学和构造特征，霍尔斯特德序列此处提出的工作产生的数据将允许对一个完整的交叉进行全面的分析， Shoo Fly Complex的一部分，并将添加这对我们了解地球上最大的位于加州的下古生代岩石。结果可能会有一个对北美原住民的分布产生了重大影响地壳和外来或可疑的地壳元素。