| Gannan has long been known as world Tungsten center, and Nanling ’Tungsten-Tin metallogenic belt is very famous in the world. Chongyi-Dayu-Shangyou metallogenic belt locates in the east of Nanling, and in terms of tectonics, it is south Jiangxi-east Hunan depression of west Wuyi uplift of Cathaysia plate of subduction zone between Eurasian plate and west Pacific plate. Nevertheless, it is across the margin between Wuyi and Ganzhou-Chenzhou. In the past, here had been done plenty of studies, including the prediction of concealed ore body, the zonation for the primary halos of veinlet-type Tungsten-Tin deposit, the characteristic of vertical stratification of ore body, especially proposing "Five-Layer" metallogenic model of Tungsten deposit has been being applied internationally.The stratum of Sinian-Ordovician basal clastic rocks distributes widely in Chongyi-Dayu-Shangyou metallogenic belt. And the metallogenic belt shows the following characteristics. Elementarily, Ca is very rich while Na is a little poorer, and the background value of Tungsten-Tin is much higher, with the occurrence of wolframite. Tectonically, the net of EW and NNE structure is clear, and the ore-control law is obvious. In terms of magmatite, the activity of Yanshan magma of the Tungsten-Tin-rich metallogenic element is very strong, with the result of the rock development of Jiujiunao, Xihuashan, Piaotang, Hongtaoling, Tianmenshan, Zhangtiantang, Yingqian, which are the metallogenic original rocks of Tungsten-Tin deposit. Chongyi-Dayu-Shangyou tungsten-Tin deposit shapes out as belt, with the characteristic of isometry and equivalent depth between each two deposit, and it distributes so densely that it becomes one of the densest district of wolframite deposit in China.A new type of mineralized tungsten, called "the compound type of tattered belt and quartz vein" has been discovered in Niujiaowo mining area. The new type is close to tattered-alternation belt, with the similar strike, dip and dip angle, and the thickness of ore body, and accompanied or symbiotic with the constituent of Sn、Pb、Zn、Cu and Ag. The integrated value of the new deposit so high that a new conception has been proposed as the vicinity of ore body, even the contacting zone and tattered belt with ore body are advantageous in prospecting tungsten mine. Also, the metallogenic law and model of Niujiaowo、Laoanli、Jinyinan and Taoxikeng deposit have been summarized up and discussed respectively. The exploration of "the compound of tattered belt and quartz vein" has been done detailedly with the result of large addition of new resources and grasping the characteristic of mineralization. Tin ore body in Laoanli deposit has been confirmed as tattered type. The ore-control model of "right type-echelon" shear fracture and the "Three-layer" metallogenic model of the inner anomaly have been generalized respectively. And in Taoxikeng deposit, the ore-control model of "left type-knob" fracture has been proposed, even found the prospecting potential of "basement" under the "Five-layer". |
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