Crustal Reflection Profiling Across the Oldest Archean Crust and Crustal Sutures, West Greenland: Processing and Interpretation

格陵兰岛西部最古老的太古代地壳和地壳缝合线的地壳反射剖面：处理和解释

• 批准号: 9023847
• 负责人: Scott Smithson
• 金额: $ 4万
• 依托单位: University of Wyoming
• 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: 1991-03-15 至 1992-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9023847&HistoricalAwards=false
• 关键词: Crustal; Reflection; Profiling; Across; Oldest

The Archean rock of West Greenland represent some of the best-exposed, best-studied, oldest rocks known and thus constitute a prime target for crustal reflection studies. Interpretation of crustal reflection data has attained its greatest success where "deep" seismic data was correlated with surface geology. The Archean of West Greenland is thus an excellent geophysical target because of its exposure and age that allows the study of early crustal processes. This award supports the interpretation of a recently completed gravity study in the area and a combined gravity and magnetic investigation. The research is a cooperative project between Norwegian, Danish, and U.S. scientists. Problems being addressed by this research include: 1) continuation of the deformation zone to depth, 2) crustal shortening and mode of deformation, 3) role of volatiles in the deep crust, 4) change in Moho depth, 5) Archean crustal development, and 6) nature of deep crust under granulities.

西格陵兰岛的太古宙岩石代表了一些已知的暴露最好、研究最深入、最古老的岩石，因此构成了地壳反射研究的主要目标。地壳反射数据的解释取得了最大的成功，“深部”地震数据与地表地质相关联。因此，西格陵兰岛的太古宙是一个极好的地球物理目标，因为它的暴露和年龄允许研究早期地壳过程。这项裁决支持对最近在该地区完成的重力研究和重磁联合调查的解释。这项研究是挪威、丹麦和美国科学家的合作项目。本研究涉及的问题包括：1)变形带向深部的延续，2)地壳缩短和变形方式，3)挥发分在地壳深部的作用，4)莫霍面深度的变化，5)太古代地壳发育，6)深部地壳在粒度下的性质。