Foundering lithosphere imaged beneath the Southern Sierra Nevada, California, USA

被引：113

作者：

Boyd, OS ^{[1
]}

Jones, CH ^{[1
]}

Sheehan, AF ^{[1
]}

机构：

[1] Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA

来源：

SCIENCE | 2004年 / 305卷 / 5684期

关键词：

D O I：

10.1126/science.1099181

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 [理学]; 0710 [生物学]; 09 [农学];

摘要：

Seismic tomography reveals garnet-rich crust and mantle lithosphere descending into the upper mantle beneath the southeastern Sierra Nevada. The descending lithosphere consists of two layers: an iron-rich eclogite above a magnesium-rich garnet peridotite. These results place descending eclogite above and east of high P wave speed material previously imaged beneath the southern Great Valley, suggesting a previously unsuspected coherence in the lithospheric removal process.

引用

页码：660 / 662

页数：3

共 31 条

[1]

UPPER MANTLE ANELASTICITY AND TECTONIC EVOLUTION OF THE WESTERN UNITED-STATES FROM SURFACE-WAVE ATTENUATION [J].