Metallogenic Condition And Prospecting Target Of Polymetalic Deposit In The Xinxing Forest Farm, Hailin,heilongjiang

The study area is located in the south of the Xiaoxing'anling– Zhangguangcailing polymetallic belt. The Tectonic position is the Paleo-Asian tectonic of Tianshan -Xing'an orogenic group of ancient Chinese land mass of Jilin Heilongjing mosaic block , which is put together with the east and west two block of the Heilongjiang province . It is experienced a number of rifting and put together, structural - magmatic activity is well developed, gold and polymetallic mineralization concentrated output. The research of the Hailin mineral mineralization and evaluation of regional ore potential is important to improve the economic competitiveness of mineral resources .The strata exposed in the region is mainly the Upper Proterozoic Zhangguangcai group (Pt32zh), the Cambrian Qianshan Group (∈1q), the Permian Hongshan Group (P2h), Permian– Triassic Wudaoling group (P2-T1w), and the Triassic Fengshantun Group (T3f). Large area of distribution of intrusive rocks in the region, and mainly is Zhangguangcailing intrusive rocks, the late Indo-intrusive rocks. Controlled by regional tectonic evolution, the local faults including the North East, North West, South and east-west trending faults, and these with the regional north-south fault Mudanjiang lithosphere, the North East - North and South to the Founder - long close set lithospheric fracture, are The latter's low-order times or derived structures. New Forest area folds to the main north-south anticline to the complex and space was "S"-type distribution.The region has been found iron, polymetallic, copper point 10 . The project mainly related to the Sandaoguan multi-metal deposit, Hailin (Jiapigou) copper deposit, Lishugou multi-metal deposit, Qinglongmiao and Moshishan and other multi-metal ore deposits (points) a detailed work on the geology of the deposit characteristics, mineralization, exploration was discussed.The Xinxing areas of emerging characteristics of the ore-forming fluid system. The Qinglongmiao and the Moshishan copper-polymetallic ore-bearing quartz veins, granodiorite microscopic fluid inclusions in the petrographic study of selected representative inclusions in Lin Kan THMS-600-type cold bench temperature, select the Typical Raman spectra of inclusions composition analysis completed. The results show that Moshishan polymetallic deposit ore-forming fluids are NaCl-H2O-CO2 system types, more with the presence of CO2 inclusions that may come from its ore-forming melt hydrothermal magmatic differentiation. Forming the overall change in temperature 205.9℃~ 297.6℃in between, is the scope of mesothermal mineralization; forming pressure of 75 ~ 110 MPa, reflecting the depth of mineralization formed in the middle. The genesis of deposit is magma-related hydrothermal type. The Qinglongmiao and copper bearing quartz veins granodiorite rocks the native British particles with strong comparable fluid inclusions, containing three-phase and gas-liquid two-phase CO2 inclusions are the main types of fluid inclusions, ore-forming fluids with heterogeneity, forming pressure of 90~141MPa, reflecting the depth of mineralization characteristics of medium depth.The Hailin polymetallic deposits in emerging forest area affected by the formation of the first belt Zhangguangcailing evolution of control, followed by the ore-bearing strata, Mesozoic granitic magmatism and control faults, which constitute the region forming the geological conditions. The results of the regional stream sediment by the statistics can see as elements in the group have a certain concentration, Fengshantun, indicating magmatic activity with; As, Sb, Pb, Zn, Ag formation in the Qianshan was significantly enrichment, and has a larger coefficient of variation, suggesting that its contribution to the formation of main ore (ore-forming environment and provide the ore sources); new group has an important control on the role of Cu mineralization. After a new forest areas in different periods Hailin magmatic ore-controlling characteristics of that granitic magmatism Qianshan control of deposit, formation and distribution of mineralization, the mineralization in this area constitute a dominant factor. The gold and silver mineralization, copper and zinc of mineralization of the environment is controlled by the same period of the product of different mineralization itself to form a sino-temperature hydrothermal fluid and then warm in the magmatic epithermal hydrothermal metallogenic series.It is based on summary and study conditions and accumulation in the ore, the use of effective means to predict the mineralization to determine the exploration direction. According to the results of exploration and synthesis of research results, and further prospecting targets delineated three: the Lishugou target, the Sandaoguan target is the best deposit of Pb, Zn. There is possible to o find Mo, Cu in the Moshishan and its periphery . In addition, all known polymetallic deposits (points) deep and external, should also strengthen the deployment of exploration to find new mineral or ore bodies.