Wenshan Guanfang Skarn-type Tungsten Deposit Ore-controlling Structure

Guanfang scheelite deposit is located at osculant site between the South China Platform and the Yangtze Platform, NE side of Mengzi-Pingbian faults in the fold belt of the southeast of Yunnan,on the southwest mragin of Bozhushan arch-fold, it is a typical Postmagmatic,hypothermal-mesotheral and contact—metasomatie scheelite deposit.In the implementation of "the program of Resources exploration for Guanfang scheelite ore of Yunnan Province" in 2009,The granite contact zones and skarm had been revealed in the 22 drillings hole respectively. It has scheelite deposit in the skarms,and star-shaped in the rocks.Based on Predecessor's work, the author gathered geologic information,made field investigation, analyzed the relationship among the ore-forming conformation and stratum,it and magmatic rock,espeeially gave emphasis to the time—space relationship between ore—forming and structure in minefleld tectonic evolution history.What's more,not only metallogenetic rules were concluded,but also a new Ore—controlling model were brought forward in the paper on the basis of the studied on geological features of ore deposit and analyzesd on structural factors.Characteristics and mechanism of controlling ore structures are analyzed in the text: contact zone structure of granite and wall rock is important Metallogenic Tectonic factor. contact zone structure,Tuanshan anticline,Guanfang anticline and wall rock's cracks in the interlayer common constituted a Hydrothermal circulation. Tuanshan anticline,Guanfang anticline and wall rock's cracks in the interlayer is structure before mineralization.it is also structures as passage ways for ore fluid and ore-hosting structure. contact zone structure is structure in mineralization, is structures as passage ways for ore fluid and ore-hosting structure. form of scheelite ore body is controlled by contact zone shape. Faults of EW and NE direction is structure after mineralization,it destructed granite and mines.Tectonic evolution and Study on Mineralizational Structure System, forming and evolvement of controlling ore structures in the Guanfang orefield is concluded by a Model of ore-controlling structure...