【作者】 张苏江；

【导师】 杨言辰；

【作者基本信息】 吉林大学 ， 矿产普查与勘探， 2009， 硕士

【摘要】 铁力地区位于伊春—延寿成矿带中部,西以逊克-铁力-尚志断裂为界,东临佳木斯地块。鹿鸣钼矿床是近年来新发现和正在勘查的Mo、Cu多金属矿床,矿床矿体产出于二长花岗岩、花岗斑岩岩体中,辉钼矿、黄铜矿等金属矿物呈浸染状、细脉浸染状赋存于蚀变二长岩(局部过渡为花岗斑岩)中,总体属于重要的斑岩型矿床,矿床规模达超大型(资源总量达60万吨);翠岭钼矿位于鹿鸣西侧3km,矿床矿体产出于花岗斑岩岩体中,矿床规模为小型。对区内钼铜矿床成矿地质条件与地质、地球物理、地球化学标志等研究表明,本区成矿地质条件优越,找矿标志明显,具备较好的找矿潜力。本文从成矿地质背景分析入手,深入研究矿床地质特征、地球化学特征、成矿地质条件及其控矿机制,准确厘定了成矿岩体的形成时代,确定了该地区MoCu矿床的成因,建立成矿模式;根据成矿地质条件与地质、地球物理、地球化学测量结果研究,确定找矿标志,指明该区的找矿方向,确定后续找矿工作的预测靶区,研究成果对本地区的开展类似研究工作与部属钼铜多金属矿产勘查工作有重要指导意义。更多还原

【Abstract】 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.更多还原