湖北梅川杂岩体的地球化学特征和构造背景  

GEOCHEMICAL SIGNATURE AND STRUCTUREAL SETTING OF THE MEICHUAN COMPLEX,HUBEI

作　　者：吴海权[1] 江来利[1] 

机构地区：[1]安徽省地质调查院,安徽合肥230001

出　　处：《安徽地质》2014年第3期161-165,175,共6页Geology of Anhui

基　　金：国土资源部地质大调查资助项目(200013000108)

摘　　要：湖北梅川杂岩体位于扬子地块与秦岭—大别造山带会聚带之东南麓,其从老到新可分为陶斯垴、南泉、杨铺、赤铜山、宋家埂、鹊儿坡、赵俊等7个单元,归并为梅川超单元。岩石地球化学分析研究表明,梅川杂岩体具I型花岗岩特征,为同源岩浆成分与结构演化序列。依据本次野外地质观测,并结合前人研究显示,该杂岩体形成于燕山期造山后的伸展环境。The Meichuan complex, Hubei lies ai the southeastern loot of the converging belt of the Yangtze landmass with the Qinling-Dabie orogen, is divided into 7 units from old to new as Taosinao, Nanquan, Yangpu, Chitongshan, Songjiageng, Queerpo and Zhaojun, all included in the Meichuan super-unit. Petro-geochemical analysis indicates that the complex has the feature of l-type granite, being of comagmatic composition and structural evolution series. Based on this field geological observation, combined with previous work result, the complex is thought to be formed in extensional environment after the Yanshanian orogen.

关 键 词：梅川杂岩体 岩石地球化学特征 构造背景 同源岩浆成分与结构演化序列 早白垩世 

分 类 号：P588.34[天文地球—岩石学] P548[天文地球—地质学]