| 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 |
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| 引用本文： | 郭锋,吴有林.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[J].大地构造与成矿学,1996,20(1):38-45. |
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| 作者姓名： | 郭锋 吴有林 |
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| 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。
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| 关 键 词： | 中生代玄武岩，辉长岩包体，岩石学特征，地洼阶段，宁远－道县 |
A PETROLOGICAL STUDY ON THE GABBRO XENOLITHS FROM MESOZOIC BASALTS IN NINGYUAN-DAOXIAN,HUNAN |
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| Abstract: | 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. |
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| Keywords: | Mesozoic basalts gabbro xenoliths petrological characteristics diwa stage Ningyuan-Daoxian |
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