Sulphur isotope effects in the dissociation and evaporation of troilite: A possible mechanism for 34S enrichment in lunar soils☆
Sulphur isotope effects in the dissociation and evaporation of troilite: A possible mechanism for 34S enrichment in lunar soils☆
复制标题
硫同位素对硫陨石解离和蒸发的影响：月壤中 34S 富集的可能机制☆
DOI：
10.1016/0016-7037(80)90248-3
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发表时间：
1980
影响因子：
5
通讯作者：
C. Rees
中科院分区：
文献类型：
--
作者：
C. E. McEwinct;H. Thode;C. Rees
陨硫铁的分解和蒸发。在真空中加热到熔点，是同位素选择性的。硫铁矿分解产物中元素硫的34S32S比值比未分解产物低13.0‰，蒸发产物中元素硫的34S32S比值比残留产物低5.4‰。这两个过程同时发生，反应过程中的同位素变化与分支反应的同位素变化雅阁，在分支反应中，未反应的材料保持同位素良好混合，如在瑞利蒸馏过程中。在考虑月球土壤中硫的重同位素富集时，必须将这种同位素选择性与其他月球表面过程中的同位素选择性一起沿着考虑。
Both the dissociation and evaporation of troilite. heated to its melting point in vacuo, are isotopically selective. The elemental sulphur from the dissociation of troilite has a 34 S 32 S ratio which is 13.0‰ less than that of the undissociated material while the 34 S 32 S ratio in evaporated troilite is 5.4‰ less than that of the residual material. The two processes occur simultaneously and the isotopic variations during the course of the reaction are in accord with those for a branched reaction where the unreacted material remains isotopically well-mixed, as in a Rayleigh distillation process. This isotopic selectivity must be taken into account, along with that in other lunar surface processes, when considering the heavy isotope enrichment of sulphur in lunar soils.