| This paper is based on《The metallogenic rule research of Gold deposits in Jin Longshan,Shaanxi Province》and《The research of gold occurrence regularity, in Jin Longshan, zhen’anCounty, Shaanxi Province》to study the metallogenic rule research of Gold deposits in JinLongshan, Shaanxi Province.Gold mining area in Jin Longshan,located in Ding-Ma Hg-Sb ore belt, zhen(an)-xun(Yang) basin of the South Qin Ling, has deep research degree,but is weak in the study of oredeposit geochemical characteristics and metallogenic regularity, therefore,there is greatsignificance to choose to study geochemical characteristics and metallogenic regularity ofgold deposits in Jin Longshan.For analyzing geochemical characteristics of gold mining area in Jin Longshan,andstudying metallogenic regularity, the paper utilized the comprehensive research methods ofcombination of basic geological survey and geochemistry to study Ore deposit geologicalcharacteristics, Ore depositral characteristics, axial/vertical primary halo zoning, elementgeochemistry characteristic, tectonic geochemical characteristics, metallogenic fluidcharacteristics, The characters of the rare earth elements, elementary enrichment rules, Orebody distribution law. Following is the main achievements:1. Ore bodies are mainly existed in the Nan Yangshan and Yuan Gugou group, is mainlycontrolled by north east fracture,and then the north west fracture, Pyrite and arsenopyrite isthe main gold content mineral.2. The results of axial/vertical primary halo zoning in210ore body of Yaojian show thathydrothermal activity and denudation extent are differences in different location, leading todifferent depth ore of bodies buried. In the horizontal direction of Jin Longshan mining area,the denudation extent in east area is relatively smaller than west area, gold mineralizationshowed a trend of increase and there are Hg-Sb，Hg-Sb(-Au)，Au(-Hg)(-Sb)，Au in turn,fromthe east to west, and it concluded that east area has the potential to search for deep gold ore.3. Occurrence area of106ore body is delineated three abnormal area(Ⅰ、Ⅱ、 Ⅲ). orepotential in areaⅡis greater than areaⅠand area Ⅲ,and is the important area to furtherprospecting. 4. The analysis results of tectonic geochemical samples R type cluster show that thetemperature of gold depositralization is low. Hg and Sb ore may be an accompanyingdepositralization of gold, which obviously controlled by the structure.5. Metallogenic fluid characteristics show that from the main metallogenic period to late,Metallogenic fluid system was gradually moving from oxidation environment to reductiveenvironment, the temperature was gradually lower, with atmospheric precipitation intoMetallogenic fluid. Jin Longshan gold deposit is the sedimentary type deposit. Characteristicsof the rare earth elements suggest that wall rock provides material basis for depositralization.6. The significance for prospecting of gold deposit in Jin Longshan is compared with thesignificance for prospecting of Carlin-type gold deposits of China, the results found that theboth have the similar Ore-controlling structures, ore-bearing wall rock, the wall rockalteration, elements combination. Gold deposit in Jin Longshan is itially identified asCarlin-type gold deposit.Gold deposits in Jin Longshan whose ore-forming material came mainly from the NanYangshan and Yuan Gugou group, is mainly controlled by the north-east structures, andthen the north-west structures. Such as pyrite, arsenopyrite, limonite mineralizationalteration mineralization is closely associated with gold ore. altered rock bodies are related tohydrothermal activities, Element combination of metallogeny and metallogenic indicatorbelongs to low temperature elements combination. Gold deposits in Jin Longshan are formedunder the low temperature hydrothermal process. |
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