������¹������ǽ������·��ֵ��ش�����󴲣�����ʽ�Ⱦ״��������ɽ���ڵĶ����������У������͵İ�������󴲡����߶�¹����󴲵Ļ��������� ��e--Os ͬλ�ز��Է����������ʾ: ������� ��e ����Ϊ 11. 896 ��15. 714 μg/g���󴲵ijɿ�������ԴΪ��᣻��Դ���Կ�ԴΪ��; ��e --Os ģʽ����Ϊ ( 180. 2 ��185. 9) Ma����Ȩƽ������Ϊ ( 183. 4 ± 2. 2) Ma��������µĸ���Χ�ҳ������䣬��ʾ�ɿ������ͬʱ�������ڳ��ң���¹������γ�����٪������ΪС�˰���—�Ź����ɿ����ɽ���ڴ��ģ����--�ҽ�--�ɿ��¼��IJ���ɿ����̫ƽ����ĸ����йء�

Luming molybdenum deposit is a newly discovered large-sized porphyry molybdenum deposit�� Mo- lybdenum orebodies mainly hosted in Early Yanshanian monzogranite as disseminated shape��belonging to porphyry molybdenum in type�� According to the analysis of molybdenite ��e --Os isotope from Luming molybdenum deposit��it shows that ��e content for molybdenum is range from 11. 896 to 15. 714 μg/g�� Ore-forming materials are derived from crust-mantle mixed source and mainly from crustal source�� The ��e--Os model age is 180. 2 ��185. 9 Ma and weighted average age is (183. 4 ±2. 2) Ma�� According to the latest diagenetic age from ore-hosting rock��it indi- cates that the metallogenetic age is the same as or slightly later than diagenetic age�� Luming molybdenum formed in Early Jurassic��as the product of Early Yanshanian large-scale tectonic-magma-metallogenic event in the Lesser Xing'an--Zhangguangcai ��ange metallogenic belt�� The metallogenesis is associated with the subduction of Paleo-Pa- cific��