广西龙胜地区非构造侵位的蛇绿岩  

OPHIOLITE OF NON-TECTONIC INTRUSION IN LONGSHENG, GUANGXI

作　　者：张桂林[1] 梁金城[1] 何振培[2] 廖忠直 

机构地区：[1]桂林工学院资源工程系,桂林541004 [2]广西地质矿产局第一地质队,桂林541100

出　　处：《大地构造与成矿学》1997年第2期137-144,共8页Geotectonica et Metallogenia

摘　　要：广西龙胜地区的蛇绿岩并非是构造侵位于元古界丹洲群中的异地洋壳碎片，而是早期岩浆侵位的基性超基性岩席在原地遭受变形分解作用的透镜体型产物。岩石地球化学分析表明，龙胜蛇绿岩既不同于洋壳型蛇绿岩,又有别于岛弧型蛇绿岩，龙胜也不存在所谓的洋壳型和岛弧型两种蛇绿岩共存的现象。龙胜蛇绿岩是一种非构造侵位的另一种类型的蛇绿岩。The ophiolite hosted in Danzhou Group of Proterozoic Erathem is not broken oceanic crust induced by tectonic intrusion but the result of lensoid type deformation partitioning of early basic and ultrabasic sheet in Longsheng, Guangxi. Geochemical study shows that Longsheng ophiolite is different from both oceanic and arc type ophiolites. The so-called coexistence of oceanic and arc ophiolites has also been denied.

关 键 词：非构造侵位 蛇绿岩 变形分解作用 透镜体 龙胜 广西 

分 类 号：P588.1[天文地球—岩石学]