Majoritic garnets in Hawaiian xenoliths: preliminary results

被引：35

作者：

Keshav, S ^{[1
]}

Sen, G ^{[1
]}

机构：

[1] Florida Int Univ, Dept Earth Sci, Miami, FL 33199 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2001年 / 28卷 / 18期

关键词：

D O I：

10.1029/2001GL012950

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

In this report we present chemical, textural, and spectroscopic information on some mantle garnets from Oahu, Hawaii that have recorded the pyroxene double left right arrow garnet transformation. Their textural and compositional characteristics indicate a high pressure origin, consistent with a depth range of 180-270 km, which is much deeper than previously thought (< 100 km). One eclogitic xenolith is particularly interesting because its textural and compositional characteristics suggest an origin in the deep upper mantle or the transition zone.

引用

页码：3509 / 3512

页数：4

共 27 条

[1] PYROXENE-GARNET SOLID-SOLUTION EQUILIBRIA IN SYSTEMS MG4S14012-MG3AL2S13O12 AND FE4S14O12-FE3AL2S13O12 AT HIGH-PRESSURES AND TEMPERATURES [J].