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作 者:李秉新[1]
机构地区:[1]长安大学地球科学与国土资源学院,陕西西安710054
出 处:《西安工程学院学报》2002年第2期33-37,共5页Journal of Xi'an Engineering University
基 金:.NULL.
摘 要: 矾山岩体为偏碱性超镁铁岩正长岩杂岩体,其中蕴藏有我国北方最大的岩浆型磷灰石矿床。杂岩体依侵入顺序可分为4期,第1期为层状偏碱性超镁铁质岩,第2期为似层状辉石正长岩,第3期为非层状辉石正长岩,第4期为正长岩脉。对杂岩体的岩石化学研究表明,岩体分异趋势由富铁镁质向富碱方向演化,与碱性玄武岩的演化方向一致。<Abstrcat> Fanshan intrusive body is made up of alkaline ultramafic rock-syenite in which there is the biggest magmatic apatite deposite in the north China. According to the intrusive sequence, the complex boby is classified into 4 stages among which the first stage is layered meta-alkaline ultramaric rock, the second stage is layerlike augite syenite, the third stage is unlayered augite syeniteanl and the fourth stage is syenite vein. Petrochemical researching of the complex body shows that it evolutied from rich mafic to rich alkaline,which is in accordance with the alkaline basalt.
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