伏牛山区花岗岩地质特征和成因探讨

GEOLOGICAS CHARACTERISTICS OF GRANETE IN FUNIUSHAN REGION AND ITS GENESIS

伏牛山地区存在着两种构造类型的花岗岩，一类呈块状构造，一类呈片麻状构造。块状构造花岗岩具岩性和结构上的双重演化趋势，不同岩性、不同结构的花岗岩类侵入体相对集中分布，构成至少８个复式深成岩体。片麻状花岗岩岩性相对单调，它以岩席楔入式侵入太华群围岩，是岩浆型而非混合型花岗岩。两类花岗岩在岩性变化范围、副矿物、岩石化学及微量元素等各方面都不相同，不存在任何演化关系，更不是后期构造作用异化而成的。它们是两个时期、两种源岩、两种机制下产生的两期侵入岩。

There are two granites having different structural styles in Funiushan Mt.region i .e .mas-.sive structural granite and gneissic structural granite,The massive structural granite has doubleevolution trend of lithology and struture, the intrusive body of different lithological and structuralgranitoid is relatively,concentrated distribution,which constituted eight mutiple plutonic mass atleast.The gneissic granite intruded the country rock of Taihua Group as sheet is not mixed gran-ite but magmatic granite,its lithology is simple relatively.These two types of granites are differ-ent in lithology,accessory mineral,petrochemistry and microelements,There is no evolution rela-tion between them,not formed in the later tectonic process,They are intrusive rocks of the two-peroid in different times,sources rocks and mechanisms.