现代地质2016，Vol.30Issue(2)：294-302,340,10.
西藏日喀则地区雅鲁藏布蛇绿岩地球化学特征及其源区性质
Study on the Geochemistry and Source Characteristics of the Yalung Zangpo Ophiolite in Xigaze,Tibet
摘要
Abstract
Ophiolite from Xigaze is one of well-outcropped rocks in the Yalung Zangpo ophiolite,southern Ti-bet.Elemental and Sr-Nd isotopic compositions of the basaltic rocks from Bainang ophiolite in Xigaze were studied in this paper.The rocks are calc alkalic series,with low TiO2 (0.6% -1 .1 %),high MgO(6.6% -8.7%),Al2 O3 (1 5.3% -1 6.0%)and LOI(2.8% -4.6%).The primitive mantle-normalized multi-element pattern of basaltic rocks is similar to that of the normal Mid-Ocean Ridge Basalt(N-MORB)with the characteris-tics of island arc,which suggests that the rocks are related to subduction processes.The geochemical character-istics of Sr-Nd reflect that mantle source of Bainang ophiolite is a little enriched MORB mantle.The geochemi-cal characteristics of Tethyan Ocean are similar to those of the Indian sub-oceanic mantle,which further con-firms that the Indian sub-oceanic mantle is inherited from the Tethyan Ocean geochemical domain.关键词
白朗蛇绿岩/地球化学特征/源区性质/雅鲁藏布蛇绿岩/西藏Key words
Bainang ophiolite/geochemical characteristic/source characteristic/Yalung Zangpo ophiolite/Tibet分类
天文与地球科学引用本文复制引用
李文霞,赵志丹,朱弟成,刘栋,莫宣学,路远发..西藏日喀则地区雅鲁藏布蛇绿岩地球化学特征及其源区性质[J].现代地质,2016,30(2):294-302,340,10.基金项目
国家重点基础研究发展规划项目（2015CB452604）；国家自然科学基金项目（41273044，41225006）；中国地质调查局综合研究项目（1212011121260）；长江大学博士启动基金项目（801240010117）；长江大学青年基金项目（2015cqn23）。 （）
