黑龙江省穆棱市双桥子地区金矿成矿预测

发布时间：2018-06-06 08:12

本文选题：金及多金属矿床 + 地质特征　；参考：《吉林大学》2015年硕士论文

【摘要】：双桥子地区位于黑龙江省穆棱市东南约50km,地处太平岭金、铜多金属成矿带的北段。大地构造位置处于太平岭隆起与老黑山断陷两大构造单元的衔接部位,金厂-绥阳断裂带的北端,研究区出露地层主要有上元古界黄松群阎王殿组,古生界二叠系下统平阳镇组、双桥子组,中生界三叠系上统罗圈站组和侏罗系下统绥芬河组以及新生界第三系中新统船底山组。侵入岩从晚二叠世-晚白垩世均有分布,以燕山期花岗岩、花岗闪长岩、二长花岗岩为主,且对区内金、铜多金属成矿有重要控制作用。研究区金及多金属矿床、矿点较多,主要有金厂金矿、八号硐角砾岩筒型金矿、半截沟、松树砬子金矿、绥阳西崴子金银矿点、孔雀台金锌矿点、陆角岭金矿点、洋灰洞子铜矿等。由于区内的特殊地层、构造环境及相关的岩浆活动,为本区金、铜多金属矿床的形成提供了有利的条件。研究区内发育的矿床主要是陆角岭金矿床和洋灰洞子铜钼多金属矿床,本文以陆角岭金矿床为典型矿床。该矿床位于研究区的东南部,地处1:5万水系沉积物测量Hs 4号异常内。矿区内出露的地层为上元古界黄松群阎王殿组(Pt3yn)和三叠系上统罗圈站组(T3l);侵入岩为晚三叠-早侏罗世花岗闪长岩(T3J1γδ)、早白垩世二长花岗岩(K1ηγ)以及后期细粒闪长岩脉、石英脉等;构造以北东向断裂为主,北西向断裂次之。矿区内共圈定出4条矿化蚀变破碎带I-IV,在该带中分别发现2条金工业矿体、1条铅锌工业矿体、6条金非工业矿体、1条铅锌银非工业矿体、12条金矿化体、1条铅锌矿化体,矿床成因类型推断为变质~热液型金矿。根据区域1:5万水系沉积物测量成果,对比陆角岭金矿床和洋灰洞子铜钼多金属矿床的成矿特征,在研究区圈定成矿预测区2处,预测区的成矿地质特征与邻区的陆角岭金矿床类比,成矿地质条件相同,同样是寻找金多金属矿的有利地段。根据各预测区的成矿地质背景、次生晕异常特征、高磁异常特征和激电异常情况对其找矿潜力进行了评价。研究认为双桥子地区的金多金属成矿预测区(I区和II区)内出露地层主要是上元古界黄松群阎王殿组地层为区内的主要含矿层,受北东向断裂构造控制明显,晚二叠世花岗闪长岩的侵入为本区矿化蚀变提供了热源,形成一条硅化、黄铁矿化、泥化(高岭土化)带,并发现有多处土壤异常和物探异常分布在阎王殿组地层中。通过对研究区和陆角岭矿床地质条件和找矿标志的研究结果表明,两区同处在1:5万水系沉积物异常内,并有相似的地层、构造、侵入岩条件和物化探异常。所以研究区具有较好的进一步找矿潜力,具有寻找金多金属矿床的良好前景,是寻找变质~热液型金矿床的有望地段。
[Abstract]:Shuangqiao area is located about 50 km southeast of Muling City, Heilongjiang Province, and is located in the northern section of the Taiping Gold and Copper Polymetallic metallogenic Belt. The tectonic position is located at the junction of the two tectonic units of the Taiping Ridge uplift and the Laoheishan fault depression, and the northern end of the Jinchang-Suiyang fault zone. The exposed strata in the study area are mainly the Yan-wangdian formation of the Huangsong Group of the Upper Proterozoic. Paleozoic Lower Permian Pingyangzhen formation, Shuangqiao formation, Mesozoic Triassic Upper Permian Luoquan Station formation, Jurassic Lower Series Suifenhe formation and Cenozoic Tertiary Miocene Chuandieshan formation. The intrusive rocks were distributed from the late Permian to the late Cretaceous, with the Yanshanian granite, granodiorite and monzomorphic granodiorite as the main ones, and they played an important role in controlling the gold and copper polymetallic mineralization in the area. There are many gold and polymetallic deposits in the study area, including the Jinchang gold deposit, the No.8 Dongdong breccia tube gold deposit, the Tongjiaogou gold deposit, the Songshulazi gold deposit, the Suiyang Xiweizi gold-silver deposit, the Kongcantai gold-zinc deposit, the Lujiaoling gold deposit, Yanglidongzi Copper Mine, etc. Because of the special strata, tectonic environment and related magmatic activities, the formation of gold and copper polymetallic deposits in this area is favorable. The deposits developed in the study area are mainly Lujiaoling gold deposit and Yangzhitongzi copper-molybdenum polymetallic deposit. The Lujiaoling gold deposit is a typical deposit in this paper. The deposit is located in the southeast of the study area. The strata exposed in the mining area are the Upper Proterozoic Huangsong Group Yanwangdian formation (Pt3ynn) and the Triassic Upper Permian Luoquan Station formation (T _ 3lhe), the intrusive rocks are the late Triassic-early Jurassic granodiorite (T _ 3J _ 1 纬未), the early Cretaceous granodiorite K _ (1 畏纬) and the late fine-grained diorite and quartz veins. The main fault is N E trending fault, followed by N W trending fault. A total of 4 mineralization altered and broken zones I-IVwere delineated in the mining area. In this zone, 2 gold industrial bodies, 1 lead and zinc industrial ore bodies, 1 lead, zinc and silver non industrial ore bodies, 1 lead zinc orebody, 1 lead zinc ore body, 1 lead zinc ore body, The genetic types of the deposits are deduced to be metamorphic-hydrothermal gold deposits. Based on the results of regional sediment survey of 1: 50 000 water system, the metallogenic characteristics of Lujiaoling gold deposit and Yangshidongzi copper-molybdenum polymetallic deposit are compared, and 2 metallogenic prediction areas are delineated in the study area. The metallogenic geological characteristics of the prediction area are similar to those of the Lujiaoling gold deposit in the adjacent area. The metallogenic geological conditions are the same, and the metallogenic geological conditions are also favorable for the prospecting of gold polymetallic deposits. According to the metallogenic geological background, the characteristics of secondary halo anomaly, high magnetic anomaly and induced electric anomaly, the prospecting potential is evaluated. It is considered that the exposed strata in the gold polymetallic metallogenic prediction areas of Shuangqiao area are mainly the strata of the Upper Proterozoic Huangsong Group Yanwangdian formation, which are obviously controlled by the NNE fault structure. The intrusion of granodiorite from late Permian provides a heat source for mineralization alteration in this area, forming a silicification, pyrite, mud (kaolin) zone, and it is found that there are many soil anomalies and geophysical anomalies distributed in the strata of Yanwangdian formation. The results of the study on geological conditions and ore-prospecting indicators of the study area and Lujiaoling deposit show that the two areas are both located within the sediment anomaly of 1: 50 000 water system and have similar stratigraphic, structural, intrusive rock conditions and geophysical and geochemical anomalies. Therefore, the study area has a good potential for further prospecting, a good prospect for prospecting for gold polymetallic deposits, and is a promising area for the prospecting of metamorphic ~ hydrothermal gold deposits.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.51

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