随枣北部桐柏杂岩表壳岩特征、成因及时代探讨  

Study on Characteristics,Genesis and Age of Supracrustal Rock of Tongbai Complex in the North of Suizhou-Zaoyang

作　　者：向祥辉 陈婕 陈以春 吴康生 但家军 张聪 Xiang Xianghui;Chen Jie;Chen Yichun;Wu Kangsheng;Dan Jiajun;Zhang Cong(Eighth Geological Brigade of Hubei Geological Bureau,Xiangyang,Hubei 441002)

机构地区：[1]湖北省地质局第八地质大队,湖北襄阳441002

出　　处：《资源环境与工程》2018年第4期515-522,共8页Resources Environment & Engineering

基　　金：随枣北部地区中生代花岗岩类演化与金钼铅锌成矿作用研究(项目编号:ETZ2017A05)

摘　　要：桐柏杂岩表壳岩(变质岩包体)是桐柏杂岩的重要组成部分,长期被认为其时代为太古代—中元古代,通过对其岩石地质特征、主要元素地球化学特征、稀土元素地球化学特征的系统分析和古生物资料的收集整理,认为桐柏杂岩表壳岩原岩主要有玄武岩、酸性火山岩、凝灰质沉积岩、钙质沉积岩,具双峰式火山—沉积岩建造特征,形成环境属大陆裂谷双峰式火山岩;其总体特征与随枣北部新元古代—古生代变质地层具有相似性,形成时代为新元古代南华纪—古生代。Supracrustal rock of Tongbai complex(metamorphic rock inclusion)is an important part of Tongbai complex,which has long been considered as the Archean-Mesoproterozoic strata.Based on the geological characteristics of rock,the main elements geochemistry,rare earth element geochemistry characteristics of the system analysis and paleontological data collection,it is considered watchcase rock of Tongbai complex is mainly include basalt,acidic volcanic rock,tuffaceous sedimentary rocks,sedimentary calcium,bi-model volcanic-sedimentary construction characteristics,forming continental rift bi-model volcanic.The formation age is similar to that of the neoproterozoic-Paleozoic metamorphic strata in the north of Suizhou-Zaoyang.

关 键 词：桐柏杂岩 表壳岩 岩石地质特征 地球化学特征 成因时代 随枣北部 

分 类 号：P588.3[天文地球—岩石学]