平顶山市中生代花岗岩特征及花岗石资源评价

THE CHARACTERISTICS OF MESOZOIC GRANITE IN PINGDINGSHAN CITY AND THE EVALUATION FOR GRANITE RESOURCES

平顶山市南部的中生代花岗岩是伴随华北地块南缘陆内碰撞作用就位的，主要岩石类型为二长花岗岩类，成因类型为Ｈｓ、Ｓ型，各序列起始岩浆的酸度从早到晚有增高趋势，铁族元素丰度偏高，显示该区地壳偏基性的特点，按照花岗石资源评价的标准提出四棵树序列晚期单元是本区花岗石资源最有远景的成矿单元。

The Mesozoic granites in the southern Pingdingshan to follow the intracontinental collision in south margin of North China crustal block have taken their places.The main rock types are monzonitic granitoid,the genetic types are Hs and S.The acidity of initial magmas of every sequence had the increasing tendency from the early to the late,with slightly high iron family element abundance,showed a bit basic feature of Earth crust in this region.According to the evaluation standard of granite resources,the late unit of Sikeshu sequence is proposed as the most prospective one for granite resources in this region.