COLLABORATIVE RESEARCH: Tectonic Origin and Development of an Isotopically Mixed Crustal Boundary Zone: The Proterozoic Mojave-Yavapai Boundary, Southwestern U.S.

合作研究：同位素混合地壳边界带的构造起源和发展：美国西南部元古代莫哈韦-亚瓦派边界

• 批准号: 9418521
• 负责人: Ernest Duebendorfer
• 金额: $ 8.08万
• 依托单位: Northern Arizona University
• 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 1999-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9418521&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Tectonic; Origin; Development

9418521 Duebendorfer The assembly of cratons involves formation of crustal-scale boundaries as disparate crustal blocks collide and amalogmate. Understanding of these boundaries in younger rocks is aided by relatively shallow levels of exposure and relatively clear lithologic and temporal differences. However, aspects of precambrian terrane boundaries remain problematic due in part to deep levels of exposure and reliance an isotopic data for terrane discrimination. This collaborative project will employ a variety of techniques and study one Precambrian boundary (Mojave and Yavapai) in considerable detail, with the goal of formulating a tectonic model for development of the zone that honors all geologic constraints. Results will lead to increased understanding of crustal boundaries in deeply eroded ancient accreted terranes.

9418521迪本多夫克拉通的组装涉及在不同的地壳块体碰撞和混合时形成地壳尺度的边界。相对较浅的暴露水平和相对明显的岩性和时间差异有助于理解年轻岩石中的这些边界。然而，前寒武纪地体边界的一些方面仍然存在问题，部分原因是暴露程度很深，对地体的依赖程度很高，而且人们对地体区分的同位素数据缺乏了解。这一合作项目将采用多种技术，对一条前寒武纪界线(莫哈韦和雅瓦派)进行相当详细的研究，目的是为该地区的开发制定一个符合所有地质限制的构造模型。这一结果将有助于加深对受深度侵蚀的古吸积地体中地壳边界的了解。