Rare gases in the chondrite pantar
Rare gases in the chondrite pantar
复制标题
球粒陨石pantar中的稀有气体
DOI：
10.1029/jz067i005p02017
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发表时间：
1962
影响因子：
--
通讯作者：
J. H. Reynolds
中科院分区：
文献类型：
--
作者：
C. Merrihue;R. Pepin;J. H. Reynolds
球粒陨石Pantar的Ne和He测量得到证实，测量范围扩大到包括Ar和Xe。这颗陨石的轻相是大多数陨石的典型特征，其放射性He/sup 4/和Ar/sup 40/以及宇宙成因He/sup 3/，氖和氩。在暗相，不透明的矿物在球粒外面，富含原始稀有气体。原始氙，表现出一般的同位素异常相同的碳质玄武岩中发现的，发生在这两个阶段，但在黑暗的阶段是12倍更丰富。来自I/sup 129/衰变的放射性核素I/sup 129/在这两个阶段都有发生，但在暗阶段的丰度要高出53倍。原始气体光谱类似于其他陨石的He/Ne和Ar/Ar比率。在Ar/Ne和Ne/sup 20/Ne/sup 22/比值上，它类似于Pesyanoe，属于可以松散地描述为富含气体的岩石的宇宙群。（auth）
Ne and He stadies for the chondrite Pantar were confirmed, and measurements were extended to include Ar and Xe. The light phase of this meteorite is typical of most chondrites in its content of radiogenic He/sup 4/ and Ar/sup 40/ and cosmogenic He/sup 3/, neon, and argon. The dark phase, in which opaque minerals outiine the chondrules, is rich in primordial rare gases. Primordial xenon, exhibiting general isotopic anomalies identical to those found in carbonaceous chondrites, occurs in both phases but is 12 times more abundant in the dark phase. Radiogenic Xe/sup 129/ from I/sup 129/ decay occurs in both phases but is 53 times more abundant in the dark phase. The primordial gas spectrum resembles other meteorites in its He/Ne and Xe/Ar ratios. In its Ar/Ne and Ne/sup 20/Ne/sup 22/ ratios it resembles Pesyanoe and belongs to what can be loosely described as a cosmic group of gas-rich stones. (auth)