Early accretion of water in the inner solar system from a carbonaceous chondrite-like source

被引：106

作者：

Sarafian, Adam R. ^{[1
]}

Nielsen, Sune G. ^{[1
]}

Marschall, Horst R. ^{[1
,2
,3
]}

McCubbin, Francis M. ^{[4
]}

Monteleone, Brian D. ^{[1
]}

机构：

[1] Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA

[2] Amer Museum Nat Hist, Dept Earth & Planetary Sci, New York, NY 10024 USA

[3] Univ Bristol, Sch Earth Sci, Bristol BS8 1RJ, Avon, England

[4] Univ New Mexico, Inst Meteorit, Albuquerque, NM 87131 USA

来源：

SCIENCE | 2014年 / 346卷 / 6209期

基金：

美国安德鲁·梅隆基金会; 美国国家科学基金会;

关键词：

U-PB; HYDROGEN; DELIVERY; HISTORY; SURFACE; ZIRCONS; ORIGIN; OXYGEN; VESTA;

D O I：

10.1126/science.1256717

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：

Determining the origin of water and the timing of its accretion within the inner solar system is important for understanding the dynamics of planet formation. The timing of water accretion to the inner solar system also has implications for how and when life emerged on Earth. We report in situ measurements of the hydrogen isotopic composition of the mineral apatite in eucrite meteorites, whose parent body is the main-belt asteroid 4 Vesta. These measurements sample one of the oldest hydrogen reservoirs in the solar system and show that Vesta contains the same hydrogen isotopic composition as that of carbonaceous chondrites. Taking into account the old ages of eucrite meteorites and their similarity to Earth's isotopic ratios of hydrogen, carbon, and nitrogen, we demonstrate that these volatiles could have been added early to Earth, rather than gained during a late accretion event.

引用

页码：623 / 626

页数：4

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