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Analysis On Regularity Of Ore-controlling Structure And Metallogenic Prognosis Of The Qianhe Gold Deposit In Henan

Posted on:2009-05-13Degree:MasterType:Thesis
Country:ChinaCandidate:F L MaoFull Text:PDF
GTID:2120360242484097Subject:Mineralogy, petrology, ore deposits
Abstract/Summary:PDF Full Text Request
The Qianhe gold deposit, which lies in Xiong'er Shan area in He'nan Province, is controlled strictly by the Machaoying fault. With outcrop of Heyu porphyritic granite rocks in the south, the gold deposit falls into structural altered rock type, and the gold-bearing strata is Jidanping Fm. and Majiahe Fm. of Xiong'er porphyritic andesite group. No gold deposits without fault structures, for gold deposits greatly dominated by regional fault. Through doing research from four aspects: the geological characteristics of both this area and the gold deposit, tectonic faults characteristics of ore-controlling role, trace element geochemistry and associated elements in fractural belt,this paper does some useful attempt to predict the deeper perspective of gold mine.In this paper, I research the characteristics of shear joint and the tectonic stress field this area, discuss the effect of nearly E-W strike trending sub-fracture F4 of Machaoying Fault Zone for gold deposit, research the Geo-characteristics of Shengou segment, zone the fractures and rocks in 78 and 83 exploring line in Shengou segment, statistical analyze the small fractures and the quartz vein in Shengou segment. Through this considerable work, we know that the large and deep regional faults–Machaoying fault are the ore -leading fracture, controlling the distribution of the gold deposit and mineralization zone; the secondary faults with nearly E-W strike?-F4 are the main ore-bearing structures, controlling the occurrence of ore bodies; The NE-SW compress at prime metallogenic epoch dominated the deposit ,this compress spreading the fracture with NEE strike and bettering for the gold, and contracting the fracture with NWW strike ,no bettering for the gold; Ore fracture in mineralization have experienced a period of "compression - extension" of the pulse, a "ductile- brittle" shear zone features mineralization model; the gold mineralization mainly in the extrusion Brittle stack stage. If the existence of large rock fragments, the gold mine exists on the possibility.Through Shengou segment of the F4 on the fault trace elements in the data processing and profiling, establish the original deposit structure of the halo of axial deposit with features and geochemical parameters of the axial changes, further establish the deposit structure overprinting halo model .The model is unusual elements reverse zone feature, namely that the head halo at the bottom with the sequence, the tail halo at the top with the sequence; Comprehensive analysis is the head halo of lower ore body overprinting on the tail halo of upper ore body. The model in the lower part of the head halo very strong, direct ore body side prognosis deep blind mine.By above study, 200m altitude is initial forecast for the next head of the ore body, and maybe deep mine there are blind in Shengou segment, and Shijialing region for prospecting area.
Keywords/Search Tags:Qianhe, Gold deposit, Faults, Tectono-geochemistry, Metallogenic Prognosis
PDF Full Text Request
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