Sulfur chemistry with time-varying oxygen abundance during Solar System formation

被引:89
作者
Pasek, MA
Milsom, JA
Ciesla, FJ
Lauretta, DS
Sharp, CM
Lunine, JI
机构
[1] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA
[2] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA
[3] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA
[4] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA
基金
美国国家航空航天局;
关键词
solar nebulae; meteorites; cosmochemistry; Jupiter;
D O I
10.1016/j.icarus.2004.10.012
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Chemical models of solar nebula chemistry are presented which show the influence of progressive water depletion from the inner solar nebula. The main focus of this work is the equilibrium distribution of S resulting from this process. Under canonical solar nebula conditions, H2S is the dominant S-bearing species in the gas phase and troilite (FeS) is the primary reservoir for S after condensation. As water vapor diffuses out to its condensation front, the equilibrium distribution of S changes significantly. With the removal of water vapor, SiS becomes the most abundant S-bearing gas and MgS and CaS compete with Fes as the main sulfide reservoir. These results allow us to argue that some of the minerals in the enstatite chondrites formed through the heterogeneities associated with the nebular ice condensation front, and that the sulfur abundance in Jupiter reflects a depletion in H2S that is the result of inner nebula sulfur chemistry under varying oxygen abundance. (c) 2004 Elsevier Inc. All rights reserved.
引用
收藏
页码:1 / 14
页数:14
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