An inner solar system origin of volatile elements in Mars

被引：19

作者：

Kleine, Thorsten ^{[1
,2
]}

Steller, Theodor ^{[2
]}

Burkhardt, Christoph ^{[1
,2
]}

Nimmo, Francis ^{[3
]}

机构：

[1] Max Planck Inst Solar Syst Res, Justus von Liebig Weg 3, D-37077 Gottingen, Germany

[2] Inst Planetol, Wilhelm Klemm Str 10, D-48149 Munster, Germany

[3] Univ Calif Santa Cruz, Dept Earth & Planetary Sci, Santa Cruz, CA 95064 USA

来源：

ICARUS | 2023年 / 397卷

基金：

欧洲研究理事会;

关键词：

Nucleosynthetic isotope anomalies; Planet formation; Mars; Volatile elements; CORE FORMATION; ACCRETION; WATER; EARTH; MODEL; ASTEROIDS;

D O I：

10.1016/j.icarus.2023.115519

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The origin of volatile elements in Mars and whether these elements derive from the inner or outer solar system is unclear. Here we show that Mars exhibits nucleosynthetic zinc (Zn) isotope anomalies similar to those of non-carbonaceous (NC) but distinct from carbonaceous (CC) meteorites. Like for non-volatile elements, Mars' Zn isotope composition is intermediate between those of enstatite and ordinary chondrites, demonstrating that Mars acquired volatile elements predominantly from its inner solar system building blocks. The Zn isotope data limit the contribution of CI chondrite-like material to Mars to 4% by mass at most and show that Mars accreted less CC material than Earth. The origin of these disparate CC fractions is unclear, but can place constraints on how and when CC-type material was delivered to the inner solar system.

引用

页数：6

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