DIAMOND FROM THE DABIE-SHAN METAMORPHIC ROCKS AND ITS IMPLICATION FOR TECTONIC SETTING
DIAMOND FROM THE DABIE-SHAN METAMORPHIC ROCKS AND ITS IMPLICATION FOR TECTONIC SETTING
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DOI：
10.1126/science.256.5053.80
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发表时间：
1992-04-03
期刊：
影响因子：
56.9
通讯作者：
JIANG, LL
中科院分区：
文献类型：
--
作者：
XU, ST;OKAY, AI;JIANG, LL
金刚石产于中国东部安徽大别山超高压变质岩中。含金刚石岩石包括榴辉岩、石榴辉石岩和硬玉岩类。钻石赋存于柯石英和翡翠的矿物组合中。大别山的钻石和含钻石岩石被解释为早中生代扬子大陆板块俯冲基底超高压变质作用的产物，温度大于4.0千兆帕，温度高于900℃。这一解释是基于岩石单元的分布、钻石的稳定场以及表明岩石的地壳成因的同位素数据。大多数钻石以自面体包裹体的形式出现在石榴石中，直径为10至60微米，但也有一些直径高达700微米。
Diamond occurs in ultrahigh pressure metamorphic rocks from Dabie Shan, Anhui Province, eastern China. Diamond-bearing rocks include eclogite, garnet-pyroxenite, and jadeitite. Diamond occurs in a mineral assemblage with coesite and jadeite. The diamonds and diamondiferous rocks of Dabie Shan are interpreted to be the products of ultrahigh pressure metamorphism in the underthrust basement of the Yangtze continental plate during the early Mesozoic, at greater than 4.0 gigapascals and 900-degrees-C. This interpretation is based on the distribution of rock units, the stability field of diamond, and isotopic data indicating a crustal origin for the rocks. Most diamonds occur as euhedral inclusions in garnets and are 10 to 60 micrometers across, although some are up to 700 micrometers across.