东秦岭灵山岩体岩石谱系单位类埃达克质花岗岩及其成因和构造环境意义  

The lithodemic units of adakite-like granite on genetic Types and tectonic settings for the Lingshan Pluton, East Qinling

作　　者：赖群生 樊中玲[1] 易志强[1] 邵世威 张跃[1] 杨涛[1] 

机构地区：[1]河南省地质矿产勘查开发局第一地质勘查院,郑州450000

出　　处：《华南地质与矿产》2016年第1期21-33,共13页Geology and Mineral Resources of South China

基　　金：河南省2009年度地质勘查基金矿调项目:河南省境内游河幅;长台关半幅;浉河港幅;信阳市幅;五里店半幅;谭家河幅;李家寨幅;涩港幅;蔡家河幅;大新店幅;宣化店幅1︰5万矿产地质调查

摘　　要：灵山岩体地处东秦岭造山带的南秦岭构造带的桐(柏)-商(城)断裂两侧。根据内部接触关系和结构等方面的差异,将灵山岩体划分为主侵入期四个单元和补充期三个独立单元。该花岗岩属高硅碱富钾贫钙低镁碱性系列,稀土元素总量较高且具右倾海鸥式配分模式,微量元素具富集大离子亲石元素K、Rb、Ba等和亏损高场强元素Zr、Hf、P、Ta、Nb、Ti等特点;是具有某些I型(类埃达克质)花岗岩地球化学特征的同熔性S型花岗岩,形成于弧-陆碰撞造山后(非造山)的拉张环境。Lingshan Pluton is located in two sides of the Tongbai-Shangcheng Fault, which is the south Qinlingmetamorphic belt of East Qinling orogenic belt. According to the internal contact relation and structure differences,Lingshan Rock stage divided into four main units as well as another three independent units. Lingshangranite show high silica- alkali, potassium-rich , low magnesium, poor calcium alkaline series. The high totalREE is rightward incline, and the features of trace elements are rich in large ion lithophile elements （K, Rb, Ba）.while the high field strength elements （Zr, Hf, P, Ta, Nb, Ti） are depleted. Lingshan granite is syntectic S-typewith the geochemical characteristics of I-type and adakite-like granite, which was formed in the arc-continentpost collision （anorogenesis） tensional environment.

关 键 词：岩石谱系单位 S型花岗岩 东秦岭 灵山岩体 类埃达克质花岗岩 

分 类 号：P588.121[天文地球—岩石学]