Analyze On The Mineralization Of Wanquansi Silver-gold Deposit In Hebei Province

Wanquansi silver-gold deposit is located in mantle branch structure—get bogged down absolutely basin in the east of Zhangxuan, which genesis belong to the Epithermal lode silver-gold deposit. Mainly affected by the faults of the control,the ore show vein bodies and lens.Becoming the ore times is flexible later period of Yan Shan. In this paper, based on the geological survey in the past and collected previous research results,we pretreat. by a lot of outdoor field geological survey and indoor data analysis, in conjunction with the regional mineralization geological setting,geological characteristics,mineralization and metallogenic regularity,we can get some findings:1.In the region,we can use the mantle branch ore-controlling role in the mineralization. Judging from the regional law, we must note the center of the mantle branch-metamorphic zone, which about the copper gold mineralization. Gradual changed the external split to gold and silver ore separation, Superimposed volcano-Silver Zinc rift basin space zoning. We must observate the ring of the mantle branch and Favorable area for the construction of fault junctions.2. In the area, strong magmatic activity, complex structure, structural control are quite obvious.The north-northwest trending faults strictly control Veins. Silver-gold deposit mainly occurs on the andesite and dacite of J3b and J2h. Strata exposed is Q,J3b,J2h, old metamorphic rocks. Rock alterate and develop.3. In the plane, from the Zhang xuan mantle branch's cores to out,Payment for gold, silver and lead. Zone submits level zonation features,profile with the top lead, silver-gold lower zonation. In the vertical, with the current mining discovery,silver grade decreased with depth development, and gold grade of the tendency to increase with depth. The level and vertical branches are visible compound, reproduce pinch phenomenon.4. Based comprehensive analysis on S, Pb, C, H,O isotopic composition, it have shown that the ore-forming materials drive from the deep earth, and the ore-forming fluids are dominated by magmatic water, mixed with minor meteoric water in the process of mineralization through the study of sulfur, lead, hydrogen and oxygen isotope.5. In the mining areas, excepting No.Ⅰ,Ⅲ,Ⅴore veins which is important.We should note to find new ore body in noth of the middle of Luluwan.Because the main ore zone is located in the section. Controlling structures belong to No.III, V veins of another fracture zone east. Surface also has a very strong alteration, It should be noted prospecting,, maybe become a good new silver-gold, or gold and silver prospecting targets.