Analysis On The Prospecting Potentiality And Ore-forming Geological Conditions In Tieli Area Mo(Cu) Deposit, Heilongjiang Province

Tieli area is located in the central south of the Yichun-Yanshou magma–structure belt which geostructure position is situated in the Songnen–Zhangguangcailing block and the Jiamusi–Xingkai block collisional belt. Its special tectonic setting and related activities of the intermediate-acid magmatic rocks provided conditions for the formation of molybdenum, copper, lead-zinc, gold and high-grade iron deposit in the study area.Luming in the area molybdenum-copper deposit is a super large deposit which was recent discovered and investigated in recent years, the aspects of ore body was in the adamellite and the granite-porphyry, which belongs to the type of porphyry ore deposit. Cuiling in the area molybdenum-copper deposit was small, and it has the similar characteristics to those of Luming molybdenum-copper deposit, which is also belongs to the type of porphyry ore deposit. Studies on the granitic magmatic rock (monzonite, granite-porphyry) have shown the results that its generally belongs to the aluminium-oversaturated, high potassium calc-alkaline series I type granite. Based on the characteristics of major element, REE, trace element, isotope and regional geology, we believe that these molybdenum-copper deposits have been formed in a pull apart environment of the later syn-collision tectonic period. According to the measure of the age, The dateing of the La-ICP-MS zircon U-Pb indicates that these rock mass have been formed in the age of 174.0~178.3 Ma, and that belonged to the early period of mesozoic Yanshan Movement.The exposed granite-porphyry of the northeastern study area has obvious differences with the fine porphyritic monzonitic-orthoclase granites of the south, and the former is associated with acidic volcanic rock, but the later has controlled the element anomalies such as Mo, Cu, Ag, Bi, Pb, As, Zn, etc. And also controlled the distribution of the molybdenum-copper deposit and molybdenum copperore occurrences in the regional. The research shows indicates that the metallogenic adamellite, adamellite and granite-porphyry have obvious geophysical field characteristics of high magnetic, high resistance and low polarization, and the molybdenum-copper mineralized and developed in the section with apparent polarizability(1.5%±)and apparent resistivity (1500—2000?·m)in low,which is anastomosis with the world typical porphyry Mo(Cu) ore deposit. Based on the studies mentioned above and combined with the deposit geological characteristics of the existed deposit and ore occurrences in the study area, we made comprehensive analysis and information extraction on geological, geophysical and geochemistry, then summarized the metallogenic regularity in the metallogenic belt,and delineated thFrom existing research, we think that Tieli area has a good prospect in the explorion of Mo(Cu),W and Au, possiblely become an important mineral resource base for Mo(Cu), W, Au and nonferrous metals in the northeast China. From now on, We should made pay attention to the protection of the forest ecological environment, when we launching the mineral resources exploration and exploitation and promot the harmonious development between man and the nature and the human beings'sustainable development.