Seismic study of mantle deformation and melt extraction during continental breakup in the ENAM primary site

GSTDTAP

项目编号	1551717
	Seismic study of mantle deformation and melt extraction during continental breakup in the ENAM primary site
	Harm Van Avendonk
主持机构	University of Texas at Austin
项目开始年	2016
	2016-04-01
项目结束日期	2018-03-31
资助机构	US-NSF
项目类别	Standard Grant
项目经费	234419(USD)
国家	美国
语种	英语
英文摘要	Continental drift between the eastern United States and northwest Africa about 180 million years ago was a key event in Earth's plate tectonic history. The mechanical and volcanic processes that shaped the continental margins of the eastern U.S. left a record of volcanic crust and deep sedimentary rocks beneath the coastal plain, and offshore in the Atlantic Ocean. This project will examine the deep structure of the passive margin and provide a better understanding of the early tectonic evolution, heat flow, and sediment accumulation along the east coast of the United States. Understanding the geologic history will improve our knowledge of natural resources and ancient submarine landslides that affected the continental slope. The project supports the training of a graduate student. Specifically, the researcher and graduate student will investigate the deep structure and origin of the Blake Spur Magnetic Anomaly, which lies offshore the eastern United States. Seismic data collected during the Eastern North American Margin community experiment will be used to image the crust and upper mantle beneath this magnetic anomaly. A preliminary inspection of the seismic data suggests that seismic waves here can travel through the mantle with a speed that is higher parallel to the magnetic anomaly than perpendicular to it. This form of seismic anisotropy can be used to test whether mantle melt infiltration or stretching of the mantle rock created the rock fabric of the rifted margin.
来源学科分类	Geosciences - Ocean Sciences
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/69315
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Harm Van Avendonk.Seismic study of mantle deformation and melt extraction during continental breakup in the ENAM primary site.2016.