湖南省宁远──道县中生代玄武岩中辉长岩包体的岩石学初步研究  

A PETROLOGICAL STUDY ON THE GABBRO XENOLITHS FROM MESOZOIC BASALTS IN NINGYUAN-DAOXIAN,HUNAN

作　　者：郭锋[1] 吴有林[1] 范蔚茗[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1期38-45,共8页Geotectonica et Metallogenia

基　　金：国家自然科学基金;中科院院长基金

摘　　要：宁远－道县中生代玄武岩中辉长岩包体的岩石学、矿物学等特征表明辉长岩与寄主玄武岩分属不同系列岩石。辉长岩为偏碱性拉斑质玄武岩的分异结晶产物，类似于似层状基性侵入体。它代表了本区较早的基性岩浆熔融和侵位事件，可能是地洼活动阶段早期的一种深部岩石圈活动表现。Petrological and mineralogical characteristics of gabbro xenoliths from Mexozoic basalts in Ningyuan-Daoxian region, Hunan, show that they belong to different rock series. The basalt is similar to alkaline basalt of the intracontinental rift. while the gabbro xenolith shows that it is the differentiated product of tholeiitic lava, similar to that of layer-shaped basic pluton. The gabbro xenolith reveals an early intruaion of basic melt and the melting event is probably the earlier manifestation of deep lithosphere after the region bas come into diwa stage.

关 键 词：中生代 玄武岩 辉长岩包体 岩石学特征 

分 类 号：P588.145[天文地球—岩石学]