摘要
熊耳群为玄武粗安岩-英安流纹岩组合,大红口组为粗面岩组合,属B类的过渡型拉斑玄武岩浆系列,具以太华群为岩浆房的壳幔混染型成因;秦岭群和宽坪群为变拉斑玄武岩建造,属A类拉斑玄武岩浆系列,具幔源型成因;二郎坪群和丹凤群属细碧岩-石英角斑岩建造,C类石英角斑岩浆系列与A类拉斑玄武岩浆系列共存,具壳幔双层混合型成因。
Xionger Group is characterized by the bimodal basaltic trachyandesite-rhyodacite association. The Da-hongkou formatin belongs to the trachyte association. Both of them are thought of as the trasitional tholeiitic magma series (series B),and are given a crust-mantle contaminating genetic model within the lower crustal magma chambers of the Archean Tainhua Group. The metavolcanic rocks of the Qinling group and the Kuan-ping group belong to metatholeiite formations . They are characterized by the mafic tholeiitic magma series (series A)with the mantle-derived magma genetic model. The metavolcanic rocks of the Erlangping group and the Danfeng group can be referred to as the spilite-quartz-keratophyre formations. They have both the mafic tholeiitic magma series (series A)and the quartz-keratophyre magma series (series C)with the crustmantle two-layer mixing genetic model.
关键词
火山岩
岩浆
东秦岭
地球化学
Volcanic formation, magma series, genetic models, the East Qinling Mountains
