中华山岩体的谱系单位划分及基本特征

CLASSIFYING THE HIERARCHICAL UNITS OF ZONGHUASHAN GRANITE BODY AND ITS BASIC CHARACTERISTICS

中华山岩体形成于中三叠世，可划分出大段、沙田、竹坡、光石岩、尖坡脚等5个单元。岩性均为黑云母二长花岗岩，但岩石结构、矿物成分、岩石化学成分、微量元素和稀土元素地球化学有明显差异和演化趋势，为一同源岩浆序列，经区域对比建立中华山超单元；花岗岩属壳源物质熔融型；岩体兼具主动和被动两种就位方式。

Zhonghuashan granite body formed during middle Triassic Period, and can be classified into 5 units—Daduan unit, Shatian unit, Zhupo unit, Guangshiyan unit and Jianpuojiao unit etc. All the units are composed with biotite-bearing admellite, but they are obviously varied in their texture of rocks, composition of minerals, chemical composition of rocks, the geochemical characteristics of trace elements and rare earth elements and their evolution trend etc. They belong to a magmatic series derived from a same source. We suggested to built the Zonghuashan supper unit after comparing with the regional geology, and the granite is melting-type derived from crustal, and the intrusive ways contain the initiative and the passive.