US EPA

523635 

Journal Article 

Porphyry copper-molybdenum ore association: Genesis, dimensions, and boundaries 

Sotnikov, VI 

2006 

47 

3 

355-363 

English 

The problem of the dimensions and boundaries of porphyry Cu-Mo ore association is discussed in terms of the genesis and occurrence of ore-forming porphyry magmatism, geochemistry and zoning of mineralization, and geologic and physicochemical conditions of ore-metasomatic processes. With regard to the common Cu-Mo composition of deposits ( though essentially copper and essentially molybdenum deposits were also considered) and their intimate relationship with granitoid porphyry intrusions ( of both deep-level basaltoid and shallow-depth genesis in a relatively open environment), all porphyry Cu-Mo deposits can be united into a single porphyry Cu-Mo association, which is subdivided into porphyry Cu, porphyry Mo-Cu, porphyry Cu-Mo, and porphyry Mo types. Defining the boundaries of ore association requires analysis of all products of a porphyry Cu-Mo ore-magmatic system with regard to the common zoning of produced mineralization: Fe-Mo( Cu) - Cu( Mo) Cu( Au) - Fe( Au) - Pb, Zn - Au(Ag). 

porphyry Cu-Mo ore association (dimensions and boundaries); mantle-crust interaction; mixing of different magmas; ar-40/ar-39 geochronology; magmatic systems; mo deposits; rb-sr; k-ar; cu; mineralization; rocks; belt; gold