黑龙江省下嘎来奥伊河上游铅锌多金属矿床地质特征与成因研究

发布时间：2018-07-01 10:22

本文选题：下嘎来奥伊河上游 + 铅锌多金属矿　；参考：《吉林大学》2017年硕士论文

【摘要】：下嘎来奥伊河上游铅锌多金属矿所处区域位于位于额尔古纳地块南缘与大兴安岭火山岩带北缘相交部位的西段。研究区内主要出露地层有中元古界兴华渡口岩群、上元古界下寒武统的倭勒根岩群,侵入岩为早寒武纪中细粒花岗岩、中—中细粒花岗闪长岩,以及早白垩纪中细粒花岗岩、闪长岩,花岗斑岩以及部分二长花岗岩、斜长花岗岩等。矿区的赋矿层位主要是倭勒根岩群吉祥沟岩组的大理岩及大理岩与侵入岩的接触带,在接触带及大理岩中由岩浆及其气液作用形成的接触交代变质岩是矿区的主要赋矿层位。矽卡岩是矿区的主要赋矿岩。岩石中发育较多绿帘石化、绿泥石化、硅化、部分发育碳酸盐化、绢云母化、褐铁矿化、黄铁矿化。次闪石化、阳起石化,与角岩、变质板岩、矽卡岩关系密切,常见次闪石化、阳起石化。矿区内构造主要表现为褶皱、糜棱岩化带、火山构造、断裂,其中褶皱由东向西存在:东部的背型褶皱,中部的向、背型复式褶皱以及西部的背型褶皱,其中复式褶皱为主矿区的控矿构造。下唣来奥伊河上游铅锌多金属矿在预查、普查之后,开展了地质、物探、化探的综合找矿勘查,共投入槽探31959m3钻探23170.27m及各种采样化验测试工作。经勘探共圈定了铁矿体22条,铅锌矿体32条,钼矿体14条,矿体最小长25m,最大长300m。铅+锌品位6.03%,平均厚度5-7.79m,矿石类型为磁铁矿石、铅锌矿石、钼矿石。经可选性试验,铁矿石为易选矿石,铁精矿品位67.4%,铁回收率85.85%;铅精矿品位62.25%,回收率92.76%;锌精矿品位50.58%,回收率91.93%;可同时综合回收硫、银,属易选矿石。本文对之前预查、普查工作的总结并针对本次工作加以分析,并综合区域地质矿产背景、成矿地质条件、地球化学和地球物理等方面的特征,总结了下嘎来奥伊河上游铅锌多金属矿床形成的地质特征,并进一步对矿床的成因类型、成矿条件进行了探讨、总结,为下一步具体工作提供指导意见。
[Abstract]:The Pb-Zn polymetallic deposit in the upper reaches of the Lower Galleo River is located in the western section of the southern margin of the Erguna block and the northern margin of the Daxing'anling volcanic belt. The main outcrops in the study area are the Xinghua Dukou Group of the Middle Proterozoic and the Wulergen Group of the Lower Cambrian of the Upper Proterozoic. The intrusive rocks are the early Cambrian medium fine granodiorite, the medium to medium granodiorite, and the early Cretaceous medium fine granites. Diorite, granitic porphyry, and part of monzogranite, plagioclase granite, etc. The ore-bearing strata are mainly marble of Jixianggou formation and contact zone between marble and intrusive rock. Contact metamorphic rocks formed by magma and its gas-liquid in contact zone are the main ore-bearing strata of the mining area. Skarn is the main ore-bearing rock in the mining area. There are more green curtain fossilization, green mud fossilization, silicification, partial carbonization, sericite, limonite and pyrite in the rocks. Secondary diorite, actinolite, is closely related to hornstone, metamorphic slate and skarn. The main structures in the mining area are fold, mylonization zone, volcanic structure and fault, in which the fold exists from east to west: the back fold in the east, the direction in the middle, the compound fold in the west, and the back fold in the west. Among them, the ore-controlling structure of the compound fold is the main ore area. After preliminary investigation and general investigation of lead and zinc polymetallic ore deposits in the upper reaches of the Xiolaihe River, comprehensive prospecting of geology, geophysical prospecting and geochemical exploration has been carried out, and a total of 23170.27m 31959m3 drilling and various sampling and testing work have been carried out. A total of 22 iron ore bodies, 32 lead and zinc ore bodies and 14 molybdenum ore bodies have been delineated through exploration, with a minimum length of 25 m and a maximum length of 300 m. The grade of lead and zinc is 6.03 and the average thickness is 5-7.79m.The ore types are magnetite, lead-zinc ore and molybdenum ore. The ore is easy to be separated, the grade of iron concentrate is 67.4, the recovery rate of iron is 85.85; the grade of lead concentrate is 62.25, the recovery rate is 92.76cm; the grade of zinc concentrate is 50.58 and the recovery rate is 91.93; the recovery of sulfur and silver is easy to be separated at the same time. In this paper, we summarize and analyze the previous investigation and survey work, and synthesize the regional geological and mineral background, metallogenic geological conditions, geochemistry and geophysics, etc. The geological characteristics of the Pb-Zn polymetallic deposits in the upper reaches of Lower Kalaioi River are summarized, and the genetic types and metallogenic conditions of the deposits are discussed.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.2

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