Petrology and Geochemistry Features of theMetamorphic Volcanic Rocks in Mianxian Lueyang Suture Zone,South Qinling
南秦岭勉县—略阳结合带变质火山岩岩石地球化学特征

Keywords: Metamorphic volcanic rocks,Mid,ocean ridge setting,Island arc setting,South Qinling
变质火山岩,洋脊环境,岛弧环境,南秦岭

Full-Text   Cite this paper   Add to My Lib

Abstract:

勉县－略阳结合带变质火山岩以基性和中基性岩石为主体，见有少量英安质火山岩。可区分为两种岩石－构造组合类型：一类为低钾高钛、轻稀土亏损的拉斑玄武岩，Ｔｉ／Ｖ、Ｔｈ／Ｔａ、Ｔｈ／Ｙｂ、Ｔａ／Ｙｂ表明其应属于ＭＯＲＢ型玄武岩；另一类为岛弧火山岩组合，以钙碱性安山岩类为主体，并有少量岛弧拉斑玄武岩类。

Full-Text