Recharge in volcanic systems: Evidence from isotope profiles of phenocrysts

被引：210

作者：

Davidson, JP

Tepley, FJ

机构：

[1] Dept. of Earth and Space Sciences, University of California, Los Angeles

来源：

SCIENCE | 1997年 / 275卷 / 5301期

关键词：

D O I：

10.1126/science.275.5301.826

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：

Strontium isotope ratios measured from core to rim across plagioclase feldspar crystals can be used to monitor changes in the isotope composition of the magma from which they grew. In samples from three magma systems from convergent margin volcanoes, sudden changes in major element composition, petrographic features, and strontium isotope composition were found to correspond to discrete magmatic events, most likely repeated recharge of more mafic magma with lower ratios of strontium-87 to strontium-86 into a crustally contaminated magma.

引用

页码：826 / 829

页数：4

共 32 条

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[2]

CASHMAN KV, 1990, REV MINERAL, V24, P259

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