中国地质Issue(5)：1471-1482,12.
西藏雅鲁藏布江缝合带东波地幔橄榄岩中金刚石的发现及地质意义
Diamond discovered from the Dongbo mantle peridotite in the Yarlung Zangbo suture zone, Tibet
摘要
Abstract
This paper reports the discovery of unusual mantle mineral group in the mantle peridotites of Dongbo ophiolite, which lies in the western part of the Yarlung Zangbo suture zone. The Dongbo ophiolite consists mainly of harzburgite, with a small amount of lherzolite and dunite, pyroxenite and gabbro dikes cutting across the harzburgite. Geochemical characteristics suggest that the Dongbo mantle peridotite was derived from mid-ocean ridge (MOR) but modified in a suprasubduction zone (SSZ) environment. Some grains of diamond and other unusual minerals, such as moissanite, were recovered by standard mineral separation techniques from a 693 kg sample of harzburgite. The presence of diamond, native Cr, Au, Fe, Si and Cu, together with the moissanite, indicates a strong reducing environment. The authors also found a lot of alloys, oxides, sulfides, silicates, fluoride and some other materials. These mineral assemblages recovered from the Dongbo harzburgite are very similar to those of Luobusa and Purang harzburgite, which gives evidence to the ophiolite-type diamond.关键词
金刚石/地幔橄榄岩/东波/雅鲁藏布江缝合带/西藏Key words
diamond/mantle peridotite/Dongbo/Yarlung Zangbo suture zone/Tibet分类
天文与地球科学引用本文复制引用
徐向珍,杨经绥,巴登珠,张仲明,熊发挥,李源..西藏雅鲁藏布江缝合带东波地幔橄榄岩中金刚石的发现及地质意义[J].中国地质,2015,(5):1471-1482,12.基金项目
国家行业专项（SinoProbe-05-02）、自然科学基金重点项目NSFC（40930313）、自然科学基金创新群体项目NSFC（40921001）、自然科学青年基金项目NSFC（41202036）和中国地质调查局工作项目（12120115027201）联合资助。 （）
