WATER ON MARS - CLUES FROM DEUTERIUM/HYDROGEN AND WATER CONTENTS OF HYDROUS PHASES IN SNC METEORITES

被引：207

作者：

WATSON, LL ^{[1
]}

HUTCHEON, ID ^{[1
]}

EPSTEIN, S ^{[1
]}

STOLPER, EM ^{[1
]}

机构：

[1] CALTECH, CHARLES ARMS LAB, LUNAT ASYLUM, PASADENA, CA 91125 USA

来源：

SCIENCE | 1994年 / 265卷 / 5168期

关键词：

D O I：

10.1126/science.265.5168.86

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：

Ion microprobe studies of hydrous amphibole, biotite, and apatite in shergottite-nakhlite-chassignite (SNC) meteorites, probable igneous rocks from Mars, indicate high deuterium/ hydrogen (D/H) ratios relative to terrestrial values. The amphiboles contain roughly one-tenth as much water as expected, suggesting that SNC magmas were less hydrous than previously proposed. The high but variable D/H values of these minerals are best explained by postcrystallization D enrichment of initially D-poor phases by martian crustal fluids with near atmospheric D/H (about five times the terrestrial value). These igneous phases do not directly reflect the D/H ratios of martian ''magmatic'' water but provide evidence for a D-enriched martian crustal water reservoir.

引用

页码：86 / 90

页数：5

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