�Ź���뱱��έ�ӻ����һ��ĵ���ѧ������ѧ��ȫ��������΢�����ʯHf ͬλ�ص���ϸ������ʾ: έ�ӻ����һ���������Ϊ���������ҡ����������ҡ�����--������Ҽ�������ʯӢ�����Һ�Ӣ�������ң���ͬ��ʯ����֮�������Ӵ���ϵ����ʯ���踻����Ϊ׼����--����������ʯ( A/CNK = 0. 97 �� 1. 03) ��ȫ��( K^₂O + Na^₂O) ����Ϊ6. 56% �� 9. 10%����ҪΪ�߼ظƼ���ϵ��I �ͻ����ҡ�ϡ����΢��Ԫ������ϣ�������LREE��Rb��Th��U��K��Hf����Կ���Nb��Ta��P��Ti��δEu ���еȳ̶ȸ��쳣�������쳣�������ȵ��ʯHf ͬλ�سɷ�( εHf ( t) = ( �� 6. 68 �� + 12. 13) ��TDM2 = 464 �� 1 657 Ma) �������ҽ�������Դ��������--��Ԫ�Ŵ�ʱ�ڴӿ������������Ļ����µؿ����ʣ��ֲ�ͬ���˸����ϵĵؿ����ʡ�

The analysis of geology��petrography��major and trace elements��zircon Hf isotop data of Weihe granites batholith in northern Zhangguangcai range shows that the batholith is composed mainly of granodiorite��adamellite�� orthoclase and aklali-feldspar granite with a few quartz diorite and tonalite�� Intrusive contact relationship has been recognized among different rock types�� Geochemical analysis shows that the granites are rich in silicon and potassium contents��belonging to quasi-aluminous and weakly peraluminous rocks ( A/CNK = 0. 97 �� 1. 03) �� The alkaline ( K₂O + Na₂O) is 6. 56% �� 9. 10% in contents��ascribed to high-K calc-alkaline series I-type granite�� Rare and trace earth elements of the granites are rich in LREE ��Rb��Th��U��K��Hf and depleted in Nb��Ta�� P��Ti�� Chondrite-normalized REE display moderate negative to slight positive Eu anomalies�� Variable zircon Hf isotope composition ( εHf ( t) = ( ��6. 68 ��+ 12. 13��TDM2 = 464 �� 1 675 Ma) shows that the magma origrinated from the basic crusts which accreted from depleted mantle during the Phanarozoic and Neoproterozoic��and assimilated older crust locally��