Pyroxene-spinel intergrowths in lunar and terrestrial pyroxenes
Pyroxene-spinel intergrowths in lunar and terrestrial pyroxenes
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月球和陆地辉石中的辉石-尖晶石共生体
DOI：
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发表时间：
1976
期刊：
影响因子：
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通讯作者：
S. Ghose
中科院分区：
文献类型：
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作者：
F. Okamura;I. S. Mccallum;J. Stroh;S. Ghose
本文描述了来自月球20号的鸽岩、来自阿波罗16号斜长岩67075的辉长岩和来自墨西哥San Quintin火山场的尖晶石-辉长岩结核中的正辉长石的取向共生。利用Mo K α辐射，拍摄了精心挑选的小单晶。提出了一种脱溶机制，即氧框架保持完整，而尖晶石核是由原非化学量辉石的间隙和四面体位置的阳离子迁移形成的。
The paper describes the oriented intergrowth of spinel and pyroxene in a pigeonite from Luna 20, an augite from Apollo 16 anorthosite 67075, and an orthopyroxene from a spinel lherzolite nodule from the San Quintin volcanic field, Mexico. Using Mo K alpha radiation, photographs were taken of small, hand-picked single-crystals. A mechanism of exsolution is suggested in which the oxygen framework remains intact and spinel nuclei are formed by the migration of cations from interstitial sites and tetrahedral sites in the original non-stoichiometric pyroxene.