宁远－道县地区玄武岩地球化学特征及其构造意义  

GEOCHEMISTRY AND STRUCTURAL SIGNIFICANCE OF BASALTS IN NINGYUAN AND DAOXIAN REGIONS

作　　者：吴有林[1] 林舸[1] 

机构地区：[1]中国科学院长沙大地构造研究所

出　　处：《大地构造与成矿学》1996年第3期262-266,共5页Geotectonica et Metallogenia

基　　金：国家自然科学基金

摘　　要：对湘南宁远、道县两地中生代玄武岩的岩石化学、微量元素及稀土元素等特征作了对比性分析．湘南中生代玄武岩既具裂谷特点又具陆缘活动带的特点．宁远保安地区熔浆发生源区比道县地区浅；前者还经历过一定程度的分异作用，局部熔融程度也高于后者．The authors have comparatively analysed the characteristics of petrochemistry,trace elements and REE of the Mesozoic basalts in Ningyuan and Daoxian regions,southern Hunan province.The basalts in southern Hunan province not only have characteristics of basalts in the rifts, but also have the properties of basalts in the active continental margins.The depth of origin of the basalts magma at Baoan,in Ningyuan county, is shallower than that at Huziyan, in Daoxian county,and the degree of partial melting of magma of the former is higher than that of the latter. The magma in Ninyuan has experienced differentiation to some extent.

关 键 词：地球化学 构造意义 玄武岩 

分 类 号：P588.145[天文地球—岩石学]