The granitic gneisses,the oldest pluton in Qinling complex,consist of Bi kf pl granulitites and Bi pl granulitites in which the mass fraction of SiO is higher and the Al O ,Na O,CaO,Ni,Co,Cr,Hf,Nb,Ta are lower.
The granitic gneisses,the oldest pluton in Qinling complex,consist of Bi kf pl granulitites and Bi pl granulitites in which the mass fraction of SiO is higher and the Al O ,Na O,CaO,Ni,Co,Cr,Hf,Nb,Ta are lower.
该片麻岩是目前秦岭杂岩中最古老的深成岩体，原岩岩性为（含斑）黑云母二长花岗岩，其地球化学特征是：SiO较高； AlO ，CaO，NaO大离子亲石元素及过渡性元素低；