OXYGEN ISOTOPE ZONING IN GARNET

被引：54

作者：

CHAMBERLAIN, CP

CONRAD, ME

机构：

[1] Department of Earth Sciences, Dartmouth College, Hanover

来源：

SCIENCE | 1991年 / 254卷 / 5030期

关键词：

D O I：

10.1126/science.254.5030.403

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 ; 0710 ; 09 ;

摘要：

Oxygen isotope zoning was examined within garnet with the use of the stable isotope laser probe. Four metamorphic garnets from the regional metamorphic terrane in Vermont and the skarn deposit at Carr Fork, Utah, were examined and were found to be concentrically zoned in delta-O-18 values. The largest variations in delta-O-18 values were observed in the regional metamorphic garnets, where delta-O-18 values change by 3 per mil from core to rim. These oxygen isotope zoning profiles reflect the changes in the delta-O-18 values of the rocks during garnet growth, which are caused by infiltration of fluids and by dehydration reactions during metamorphism.

引用

页码：403 / 406

页数：4

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