Noble gases and nitrogen in Tissint reveal he composition of the Mars atmosphere

被引：15
|
作者：
Avice, G. [1 ,2 ]
Bekaert, D., V [1 ]
Aoudjehane, H. Chennaoui [3 ]
Marty, B. [1 ]
机构：
[1] Univ Lorraine, CRPG CNRS, 15 Rue Notre Dame Pauvres, F-54500 Vandoeuvre Les Nancy, France
[2] CALTECH, Div Geol & Planetary Sci, 1200 E Calif Blvd, Pasadena, CA 91125 USA
[3] Hassan II Univ Casablanca, Fac Sci Ain Chock, GAIA Lab, Km 8 Route Jadida, Casablanca 20150, Morocco
来源：
GEOCHEMICAL PERSPECTIVES LETTERS | 2018年 / 6卷
基金：
欧洲研究理事会;
关键词：
ISOTOPIC COMPOSITION; MARTIAN ATMOSPHERE; SNC METEORITES; TRAPPED GASES; EARTHS MANTLE; SHERGOTTITES; ORIGIN; SIGNATURES; XENON; COMPONENTS;
D O I：
10.7185/geochemlet.1802
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Comparative planetology is crucial to unravel the origin and evolution of volatile elements on terrestrial planets. We report precise measurements of the elemental and isotopic composition of nitrogen and noble gases in the Martian meteorite Tissint. Ar-N-2 correlations confirm discrepancies between results from Viking and Martian meteorites and those from the Mars Science Laboratory (MSL) mission. The Martian atmospheric Ar-10/Ar-36 ratio is estimated to be 1714 +/- 170 (1 sigma), lower than the value determined by Viking but in agreement with, and with higher precision than, data from MSL. We confirm a solar wind-like origin for Martian Kr and Xe. Excesses on light Kr isotopes are lower than those measured by MSL. Cosmogenic excesses in the Xe isotopic spectrum could have been produced in space during exposure of the fissint parent body to cosmic rays.
引用
收藏
页码：11 / 16
页数：6
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