Research On Structural Ore-controlling Characteristics And Mineralization Prediction Of Dazhuang Antimony Deposit In Kaiyuan City, Yunnan Provinc

Dazhuang antimony ore deposit is located in Southern China antimony ore belt which has good antimony metallogenic prospects in the area.In the Regional structure,the tectonic movement is frequent and fracture structure more development.It is located in east of Kaiyuan e type structural,the northwest of Dazhuang anticline and the Dazhuang fracture from the ore deposit.In this paper,based on the study of the regional metallogenic background,different natures of structurally mechanical properties with the instruction of the geologically mechanical ore field theory,and divides structural system and summarizes structural ore-controlling regularity.On the study of geochemical features in Dazhuang antimony ore deposit,the thesis also discusses the migration and the occurrence regularity of ore-forming elemens in space.Through the study of structure of mining area features and tectonic geochemical characteristics,it mainly has following several aspects of cognitions and conclusions:(1)After a field investigation found that the formation and distribution of the ore body is mainly controled by the structure.The ore body is mainly produced in fault fracture zone,which output with stratoid and lenticular,and relation closely with fault structure.(2)The formation of the deposit is controlled by the structure.the combination of different directions is four groups.The NW-trending fault,the main fracture in Dazhuang antimony ore deposit,dominates the whole ore deposits and ore bodies in space,having the function of conducting and hosting ore.The intersection of different fractures in mining area is beneficial to the precipitation,especially the intersection form NW to nearly EW,where rich thick ore often exists.(3)By the studies of the tectonic geochemistry,and test data of sample for cluster analysis and factor analysis,it further illustrates the formation of this deposit strictly under control of the direction of NW-treading fault.(4)According to geological and tectonic characteristics,combined with the study of tectonic geochemistry and main prospecting marks,determined three ore prospecting target area.To sum up,the deposit has the characteristics of multi-stage combined ore-controlling factors,the formation and distribution of ore body is mainly controlled by tectonic,the ore deposit belongs to sedimentary type deposit.