Evidence for primordial water in Earth's deep mantle

被引：178

作者：

Hallis, Lydia J. ^{[1
,2
]}

Huss, Gary R. ^{[1
,2
]}

Nagashima, Kazuhide ^{[2
]}

Taylor, G. Jeffrey ^{[1
,2
]}

Halldorsson, Saemundur A. ^{[3
]}

Hilion, David R. ^{[3
]}

Mottl, Michael J. ^{[4
]}

Meech, Karen J. ^{[1
,5
]}

机构：

[1] Univ Hawaii, NASA Astrobiol Inst, Inst Astron, Honolulu, HI 96822 USA

[2] Univ Hawaii, Hawaii Inst Geophys & Planetol, Honolulu, HI 96822 USA

[3] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA

[4] Univ Hawaii, Dept Oceanog, Honolulu, HI 96822 USA

[5] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA

来源：

SCIENCE | 2015年 / 350卷 / 6262期

基金：

美国国家航空航天局;

关键词：

OXYGEN-ISOTOPE VARIATIONS; NOBLE-GASES; HE-3/HE-4; RATIOS; DEPLETED MANTLE; MAGMA OCEAN; MELT; ICELAND; SYSTEMATICS; INCLUSIONS; SEAWATER;

D O I：

10.1126/science.aac4834

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：

The hydrogen-isotope [deuterium/hydrogen (D/H)] ratio of Earth can be used to constrain the origin of its water. However, the most accessible reservoir, Earth's oceans, may no longer represent the original (primordial) D/H ratio, owing to changes caused by water cycling between the surface and the interior. Thus, a reservoir completely isolated from surface processes is required to define Earth's original D/H signature. Here we present data for Baffin Island and Icelandic lavas, which suggest that the deep mantle has a low D/H ratio (delta D more negative than -218 per mil). Such strongly negative values indicate the existence of a component within Earth's interior that inherited its D/H ratio directly from the protosolar nebula.

引用

页码：795 / 797

页数：3

共 40 条

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