洛宁花山岩体地球化学特征及成因的探讨

出露在河南省洛宁县境内的花山花岗岩复式岩体从早到晚依次划分为似斑状黑云母二长花岗岩，似斑状黑云母角闲石英二长岩，中细粒角闪黑云母二长花岗岩三个阶段。本文简要叙述了花山岩体各阶段岩石的地球化学特征，并结合已有基础地质、同位素资料，探讨了花山岩体的成因机制。结果表明，花山岩体属Ｉ型花岗岩类，为大陆板块内部的同熔型花岗岩，形成花山岩体的岩浆来源于混有地幔物质的太华群地层。

GEOCHEMICAL CHARACTERISTICS AND GENESIS OF HUASHAN GRANITE MASS

The emplacement of the Huashan granitic mass located in Luoning, Henan Province can be di-vided into three stages' chronologically: paraporphyritic biotite monzonitic granite, paraporphyritic biotite hornblende quartz monzonite and moderate-fine-grained hornblende biotite monzonitic gran-ite. In this paper the geocheinical characteristics of granitoid rocks of different stages in Huashan are summarized, and the petrogenesis of this granite mass is discussed based on the geology and isotope data.Studies show that the Huashan granitic mass is an I-type granitoid or an intraplate remeiting-type granite,and that its magmas were derived from the Taihua layer which was mixed with mantle material.