THE SHALLOW ATTENUATION STRUCTURE OF THE FAST-SPREADING EAST PACIFIC RISE NEAR 9-DEGREES-30'N

被引：30

作者：

CHRISTESON, GL

WILCOCK, WSD

PURDY, GM

机构：

[1] WOODS HOLE OCEANOG INST,DEPT GEOL & GEOPHYS,WOODS HOLE,MA 02543

[2] UNIV WASHINGTON,SCH OCEANOG,SEATTLE,WA 98195

来源：

GEOPHYSICAL RESEARCH LETTERS | 1994年 / 21卷 / 05期

关键词：

D O I：

10.1029/94GL00189

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Direct measurements of Q values in the shallow crust are difficult to obtain due to the lack of energy turning in this region. We analyze a unique data set consisting of seven refraction experiments carried out with both the source and receiver near the seafloor. This experimental geometry allows us to resolve the shallow compressional wave attenuation structure of young crust at the East Pacific Rise. All models depict a low-Q layer 2A (apparent Q=11-22), and several models resolve a layer 2B with a much higher Q (apparent Q >70). This structure is consistent with a layer 2A composed of extrusives overlying a layer 2B composed of sheeted dikes.

引用

页码：321 / 324

页数：4

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