Characteristics Of Geochemistry And The Prospecting Of Tungsten Deposit In Shi-Mei-Shi Area, North Guangdong Province

North Guangdong province is located in Luoxiao fold belt of the Cathaysian plate , inside the subduction zone between the Eurasian plate and western Pacific plate, namely the western of Wuyi uplift, the middle part of Luoxiao fold belt. The area is part of metallogenic zone of eastern nanling mountain, one of the center areas where have the most Tungsten deposits, south china.The average of tungsten and its associated elements which come from the stream sediments of the area is extremely bigger than the area Clarke value. It indicates that tungsten and and its associated elements were enriched.The samples of stream sediments from Middle Cambrian strata, Lower and Middle Devonian strata, Upper and Middle Devonian strata and the third period of Early Yanshanian Granites.W, Mo, Bi have the strong relativity in the differents geological bodies, Mo and Bi are the best indicator elements for tungsten deposits.There are twenty-one anomalies have been determined, they are ten second anomalies and eleven third anomalies.The anomalies of Tungsten and its associated elements form the huge E-W anomalous belts which from Wubanqiao to Xuantang and the N-N-E anomalous belts which from Yuexia to Shanmudi.The two anomalous belts intersect at the Nanshankeng Tungsten deposits, the biggest Synthetical Anomalies was formed at the area of Nanshankeng-Shibikeng-Yuzihu. Nanshankeng is the best Prospecting Target in the workaround.All the anomalous belts are controlled by sedimentary formation, magma's activities and Fault.The 1﹕10 000 soil survey at Chuanfengao and Nanshankeng deposits are the check to the the stream sediments. The result of soil survey are mainly consistent, and the result has the very good guidable meaning.The huge E-W tectonic and N-E,N-N-E faults belt are the main factors to control the distribution of Shi-Mei-Shi area, North Guangdong, the intersection of the two tectonics is the best area for a future Tungsten deposit.The main mineralization types are quartz vein - fracture zones complex type, quartz vein- altered granite complex type, quartz vein type, skarn type and micro-disseminated type in lava five types.The Tungsten deposits of quartz vein - fracture zones complex type had been discovered a few years ago, as a new deposit type it being study now. The deposit exist in the fault system which is open comparatively. There isn't strong relations between Yanshanian Granites and this type. The metallogenic temperature of this deposit type is lower than other types, most of them are middle-lower deposits, and been controlled by E-W faults obviously.The analysis results of Geochemical and harvest of regional inventory and the inspect of deposits shows that there are three Tungsten Polymetallic Deposit belts ,they are E-W Liangyuan-Luoba Tungsten belt, E-W Yao-Shi-Mei Tungsten belt and N-N-E Yuexia-Shigushan-Shanmudi Tungsten belt.