DIVISION OF DERBUGAN METALLOGENIC PROVINCES AND BELTS OF NONFERROUS AND PRECIOUS METALS

The new concept of the "Derbugan metallogenic province" is proposed instead of the "Derbugan metallogenic belt".Derbugan metallogenic province refers to the zone between the Mongolian-Okhotsk and Derbugan fracture belts.It is composed of 3 metallogenic subprovinces with NE strike.Upper Heilongjiang(depression)Au and Cu metallogenic subprovince,with the major structural line of E-W strike,which lies in the northern part of the metallogenic province,can be subdivided into 3 metallogenic belts from north to south,i.e.,Enhehada-Ergenhe Au metallogenic belt,Longgouhe-Ershiyizhan Cu and Au metallogenic belt,and Aolaqi-Walagan Au metallogenic belt.Ergun(uplift)Pb,Zn,Ag,Au and Cu metallogenic subpro vince,which lies in the middle of the metallogenic province,can be subdi vided into 3 metallogenic belts from north to south,i.e.,Wuma-Badaoka Au(Cu)metallogenic belt,Jilalin-Fukeshan Cu and Au metallogenic belt,and Xiahulin-Xijinuo Pb,Zn,Ag and Au(Cu)metallogenic belt.The direction of the major structure line is NE trend.Kerulen(depression and uplift)Cu,Pb,Zn and Ag metallogenic subpro vince with structural developed in NW and NE trends,which lies in the southern part of the metallogenic province,can be subdivided into 3 metallogenic belts,i.e.,Wushan-Changsheng Cu(Pb,Zn)metallogenic belt trending NW,Eren-Jiawula Pb,Zn and Ag metallogenic belt and Badaguan-Heishantou Cu(Mo)metallogenic belt trending NE.There are about 55 mineral deposits proven in Derbugan metallogenic province,among which 10 are super large,13 large and 25 mediate in size.Most of the deposits occur in the regions of Choibalsan in Mongolia and Chita in Russia.