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来自维基百科,自由的百科全书
碱玄岩(英语:Tephrite)是一种火成岩,具有隐晶质至斑状质地,矿物通常富含似长石(白榴石或霞石)、斜长石和碱含量较少的长石。其常见副矿物为辉石(单斜辉石),但不存在石英和橄榄石。产地包括德国海德堡内卡雷尔茨附近汉贝格的白榴石/霞石碱玄岩[1]、意大利巴西利卡塔大区武尔图雷山(Monte Vulture)的响岩碱玄岩和纳米比亚的侵入性碱玄岩。
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