THE SUBVOLACANIC ROCKS AND GEOCHEMICAL FEATURES OF XIANGLUWANZI GOLD FIELD

The subvolcanic rocks distributed in Xiangluwanzi gold field was formed by the cryptoexplosion of granite magma when it went up along an east-west-striking brittle-ductile shear zone to the sallow layer of the earth's crust.Cryptoexplosive breccia and cryptofelsite was derived from comagmatic source, as the products of different phases of a certain magmanism.Temporally, spatially and genetically, the cryptoexplosive breccia and cryptofelsite was closely related to the forming of the gold deposit.Geochemistry features of rare earth elements, microelements and isotope show that metallogenic mass and hydrothermal was of the same source of the cryptoexplosive breccia and cryptofeliste.The diagenesis and mineragenesis are the products of different phases of the same magmatism.The existance of cryptoexplosive breccra and cryptofelsite in the east-west-striking brittle-ductile shear zone is an impontant sign for prospecting deposits in the area.