首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Petrography of lamprophyre dikes from nunataks south of Schirmacher,Central Dronning Maud Land, east Antarctica
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Petrography of lamprophyre dikes from nunataks south of Schirmacher,Central Dronning Maud Land, east Antarctica

机译:南极东部Dronning Maud Land中部Schirmacher以南努纳塔克人的岩墨岩岩壁学

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摘要

A number of lamprophyre dikes intrude the ortho- and pelitic gneisses of Central Dronning Maud Land (cDML) in East Antarctica. In the four nunataks-Baalsrudfjellet, Starheimtind, Sonstebynuten and Pevikhornet, the lamprophyres exhibit three distinct mineral assemblages, biotite-clinopyroxene, biotite-clinopyroxene-olivine and biotite-clinopyroxene-horn-blende. Ocelli are invariably feldspathic in composition (Type 2). Based on the mineral assemblage and composition of the ocelli, the dikes have been grouped under calc-alkaline lamprophyre clan.
机译:南极东部莫德兰中部(cDML)的正,片状片麻岩质岩浆岩大量侵入。在四个努纳塔克族人-巴尔斯鲁德·耶勒,Starheimtind,Sonstebynuten和Pevikhornet中,煌斑岩表现出三种截然不同的矿物组合,即黑云母—斜辉石,黑云母—斜辉石—橄榄石和黑云母—斜辉石—角闪石。卵母细胞在组成上总是长石型(2型)。根据小球藻的矿物组成和组成,将堤防归为钙碱性斜生灯族。

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