| Jiawu gold deposit is located in the northeastern Tibetan, and is located in the middle of the Germany–Zeku Indosinian copper, lead and gold mineralization belt. On the basis of previous work, it was found through the strategic geological survey and pre check work by the Armed Police Gold army. And it was considered that more exploration work can make a breakthrough for ore prospecting. But in the 2008~2011 years of exploration work, the effect of the exploration, the exploration pit and the borehole is not ideal. Therefore, there was a great challenge of prospecting prospect of the area. In this paper, on the basis of the full collection, collation and study of the previous information, combined field survey results, the tectonic geochemical characteristics of the area and the mine area of the gold deposit were studied. And the deep metallogenic potential of the mine was also analysised. It hope to provide the basis for the next step work deployment. The following results were obtained:(1) The results of regional 1:20 million geochemical studies show that: The lower Triassic Series Longwu River group(T1-2l) formation, Au, as, W, Sb, Hg, Bi and other elements is relative enrichment state and discrete degree is bigger, which indicates that the formation is looking for gold, tungsten, antimony, potential of the ore bearing strata unit. Elements in the region is divided to two groups of ore-forming elements in the low temperature and high temperature ore-forming elements, two groups of elements of a weak correlation, reflect the regional experience at least in low temperature and high temperature two metallogenic hydrothermal activity. Among them, temperature ore-forming elements and iron group elements associated with strong, reflecting medium temperature hydrothermal ore-forming activities and deep relationship with substance closely, also indicates the region with deep substance migration and activity, indicating that this area has the potential of the deep prospecting. Regional geochemical field of the elements characteristics show that the fracture region of geochemical field of the elements distribution has effects at the same time, it can be concluded that with Jiawu gold deposit is located in Tangnaihai and Hai, area development in low temperature, medium temperature ore-forming elements and iron group and a variety of combinations of elements, reflect the region has superimposed metallogenic thermal fluid phenomena, also indicates that the area has deep metallogenic potential.(2) The results of the geological features of the mine area show that: Mining area of the middle and lower Triassic long provided River formation of carbonaceous slate interbedded metamorphic sandstone T1-2l3 mineralization alteration of strong, the mining area of the main ore bearing strata. The output of the ore bodies of NW and EW was controlled by the fault, and the main ore controlling and ore breaking of the research area were controlled. Mine magmatite are mainly Indosinian granodiorite and granitic porphyry, are closely related to mineralization. Mining areas have been delineated 22 veins, mainly in the carbonaceous slate and silty slate layer between the transition zone, and the distribution of the veins and fracture of mining area with development direction.(3) The results of the research on geochemical anomaly characteristics of mine area show that: with my regional gold JW-3 comprehensive anomalies, Au, Ag, as, Hg, W, Sb in low-temperature ore-forming elements coincide better, anomaly consistence focus significantly, and Pb, Zn in temperature into mineral elements coincide, the concentration and low temperature mineral elements deviation, indicating the abnormal area at least in low temperature, medium temperature two metallogenic hydrothermal activity; in addition, in low-temperature ore-forming elements are secondary anomaly zoning characteristics, and temperature, high-temperature elements only with outer indicating a strong denudation extent of the abnormal area, deep due orebodies exist.(4) The results of the geochemical characteristics of the mine area indicate that: Mining fracture zone and quartz vein Au, Ag, as, Sb, Cu, CD, Zn, Pb elements relative enrichment and uneven distribution, fracture zone and quartz veins in these elements should be local enrichment mineralization body. Mining elements symbiotic combinations of features and regional similarity, indicating mine area at least low and medium temperature two hydrothermal activity and temperature ore-forming elements and deep relationship with substance closely reflect mining area are deep ore prospecting potential. Element in the mining structure and mineralization enrichment and variation characteristics and symbiotic combination characteristics similar to those with non mineralization like differences larger, indicating a metallogenic tectonic control is obvious; analysis of the mining area three geochemical profile shows, where fault developed places, the content of Au in rocks values are relatively large and multiple reached the maximum reflect fracture of the ore-forming elements migration and enrichment has obvious control effect. Wire lining method were calculated for each profile level with known mining early mineralization have been eroded, Qu such as ditch along the late hydrothermal activity has occurred mineralization, dragon Gou Gold Mine buried deep or late no gold deposit formation.(5) The deep mineralization potential of the mine showed that: Symbiosis with Jiawu gold deposit in the area where the element composition and element geochemical field distribution of regional geochemical characteristics, and mine exploration abnormality, paragenetic assemblage, tectonic geochemistry, geochemical characteristics in the mining area are reflected in the area with deep ore potential; mining area have been with hydrothermal boiling phenomenon of hydrothermal breccia, and stringer stockwork ore, application of deep metallogenic theories, deep mining area have layered large ore bodies are possible. |
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