| West Qinling area is one of the important lead-zincdeposit in Gansu province,with high degree of geological research and prospecting work,and prospecting results are fruitful.But for now the predominant minerals and number of deposits do not comport with west Qinling area ore-forming geological background,and it has avery largeore-finding potential.Therefore,how to deepen the understanding of the metallogenic in west Qinling area has the practical significance to enhance the level of regional metallogenic regularity study and guide the mineral exploration and evaluation.This paper lays emphasis on the lead-zinc deposit in west Qinling area of the metallogenic background,geological characteristics,geophysical,geochemical,remote sensing data analysis and research,and draws the following conclusions:?According to contrastive analysis of geological characteristics,the main orebody shape,ore fabric,mineral composition,generation relationship of oxide ore and the original mineral between Daijiazhuang lead-zinc deposit and Xicheng orefield,it determines that the Daijiazhuang lead-zinc depositis sedimentary-regenerate dmodel.?Combined with the field geological work,it has been clear that the Daijiazhuang lead-zinc deposit occurs in the northwest of Xicheng basin Devonian system Longlinqiao group which contains fossils of clastic limestone and siliceous rocks.Devonian system is the main ore-bearing bed,and the minerals are mainly composed of oxidized ores.?On the basis of the characteristics of geophysical and geochemical anomalies in the area,it marks out three lead-zinc metallogenic prospective areas and nine lead-zinc mine prospecting target areas.Daijiazhuang lead-zinc deposit belongs to Chabu-changba lead-zinc mine prospective prediction area.?This paper makes a systematic analysis to Daijiazhuang lead-zinc deposit genesis characteristics,and thinks that the mining and peripheral areas have good oreprospects. |
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