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.
出处
《大地构造与成矿学》
EI
CAS
CSCD
1997年第2期137-144,共8页
Geotectonica et Metallogenia
关键词
非构造侵位
蛇绿岩
变形分解作用
透镜体
龙胜
广西
non-tectonic intrusion, ophiolite, deformation partitioning, lensoid,Longsheng, Guangxi
