³��VMS пǦͭ������󴲲��ڽ�ɳ���������³��—����ţ����չ�ѹ�����У��������������͵Ļ�ɽ�����״����󴲣��京���λΪ˫��ʽ��ɽ��ϵ�е������ʻ�ɽ--������ϵ��ͨ���о��ÿ󴲵����ɿ�Ԫ�ء�˫��ʽ��ɽ�ҺͿ�ʯ��ϡ��Ԫ������������ɿ������Դ�������ɽ�Ҽ����컷�������о�������³�����������Zn --Pb --Cu �ͻ�ɽ�����״����󴲣��γ�����ײ��ɽ���ڱ�½��( ½Ե��) ��������չ���ɵ��ѹ���ػ���; ��ʯ�����ɿ�Ԫ�غ�������w ( Zn) /w ( Pb + Zn) ��ֵΪ0. 64�����ձ��ڿ���Ĵ��ȴ�󴲽�Ϊ�ӽ�; ΣREE Ϊ( 15. 99 �� 144. 43) × 10 �� 6��ƽ��73. 99 × 10 �� 6��LREE/ HREE Ϊ3. 59 �� 11. 40��ƽ��6. 30���ʵ��͵�LREE ������; δEu Ϊ0. 13 �� 0. 46��ƽ��0. 28��Eu ���쳣���ԣ�����������Ҽ�Ϊ���ơ������������ҿռ��ϵ����й�ϵ�Լ�����ѧ������һ���Ա������ɿ����Ԫ��Դ���·��ij�Ӣ����ϵ��

The Luchun VMS Zn --Pb --Cu polymetallic deposit situated in Luchun --Hongponiuchang rift basin in Jinshajiang tectonic zone��is a typical volcanogenic massive sulfide deposit in Sangjiang region��and the ore-bearing horizon is rhyolitic volcanic-sedimentary rocks of the bimodal volcanic rock series�� Through the studying of main metallogenic elements��the bimodal volcanic rocks and the REE characteristics of ores��the metallogenic metal source��ore-bearing volcanic rocks and tectonic environment have been discussed�� The results showed that the Luchun VMS polymetallic deposit belonged to Zn --Pb --Cu type volcanogenic massive sulfide deposit and occurred in rift basin setting which formed on the thin crust during post-collision orogeny�� The value of w ( Zn) / w ( Zn + Pb) averaging as 0. 64 is close to the Kuroko-type deposit of Japan and Gacun deposit of Sichun; and the ΣREE value ( 15. 99 �� 144. 43) × 10 �� 6 is averaging of 73. 99 × 10 �� 6��and the LREE / HREE value is 3. 59 �� 11. 40�� with a mean of 6. 30��which showed the typical LREE enrichment�� The δEu 0. 13 �� 0. 46 averaging as 0. 28��obvious in Eu negative anomaly��is similar to the rhyolites in ore district�� The close spatial relationship between rhyolites and ore bodies and the consistency of their geochemical characteristics indicates that the metallogenic metals source was the underlying felsic rocks��