MANTLE FLUID AND ITS ROLE IN GOLD ORE-FORMING PROCESS_TAKING JIAPIGOU GOLD FIELD FOR EXAMPLE

Mantle fluid is a system majorly composed of C-H-O,and riched in H,CO₂,CH₄,H₂S,H₂O and incompatible elements(K,P,Li,etc.)with some metallic oxides.The composition of the mantle fluid varies with depth,lithology and physical-chemical conditions.The mantle fluids are mainly derived from mantle plumes,MORB and arc areas.According to some research results of mantle fluid,the probable metallogenic modes and mechanisms of mantle fluid are summed,and the genetic relationship between the mantle fluid and the large gold deposit field is explained by some examples.