黑龙江省大兴安岭地区雄关林场铜钼多金属矿成矿预测

发布时间：2018-02-17 02:02

  本文关键词： 大兴安岭成矿带 铜钼多金属矿 成矿规律 成矿预测　出处：《吉林大学》2015年硕士论文　论文类型：学位论文

【摘要】：研究区地处大兴安岭松和义有色金属成矿带，区内出露地层主要为新元古界-下寒武统倭勒根岩群大网子组，该组是一套为一套浅变质的中基（酸）性火山岩夹细碎屑岩沉积建造，岩浆岩主要是晚三叠世-早侏罗世中粗粒二长花岗岩，零星分布花岗斑岩、英安岩及闪长玢岩等。区内北东向构造控制了矿（化）及蚀变带的空间展布。 研究区出露铜钼多金属矿体53条，其中矿体12条（主要矿体包括：钼矿体6条、铜钼矿体2条、锌矿体1条）、矿化体41条。矿体总厚度26.92m，矿化体总厚度86.68m。矿（化）体在空间上总体呈北东-南西走向，，倾向南东，倾角在30°~40°之间，矿体深部沿产状延深较稳定，厚度变化不大。 研究认为区内铜钼多金属矿成矿主要受大网子组地层、北东向构造及二长花岗岩综合控制。大网子组地层中的黄铁绢英岩是矿（化）体的主要赋矿层位。本区火山活动频繁，晚三叠世二长花岗岩为本区铜钼金属的富集提供了热源和物源。 确立了研究区的找矿标志：①地质标志：具有绿泥石化、绿帘石化-石英绢云母化-石英钾长石化-黄铁矿化等典型交代型面状蚀变晕，在火山-构造岩浆活动的中心区域找寻中酸性侵入岩有关的斑岩型铜钼矿床。②地球化学标志：找寻地球化学组合异常套合较好、异常范围较大的土壤地球化学异常区，如Hs-5号异常。③地球物理标志：矿（化）体发育地段的地球物理特征属中阻高激化区域，如本区的ηa-01号异常。 通过综合研究与找矿标志的总结，确定本区是找寻斑岩型铜钼矿的有利地段，在地球化学铜钼铅锌异常套合较好地段，开展槽探、钻探工作。利用槽探对组合异常Ht-10号异常进行了地表揭露，见矿效果较好，本区是以后地质工作的重点区域，具有较好的找矿前景。通过地球物理方法圈定激电异常一处（ηa-01）,该处异常属中阻高激化，该异常范围大，形态规整，是找寻斑岩型铜钼矿的有利地段。
[Abstract]:The research area is located in the Song and Yi non - ferrous metal metallogenic belt of Da Hinggan Mountains . The exposed strata in the area are mainly the new Proterozoic - Lower Cambrian Bonbonite Group , which is a set of shallow metamorphic medium - base ( acid ) volcanic rocks with fine clastic sedimentary formation . The magmatic rock is mainly the coarse - grained dilong granite , sporadic distributed granodiorite , dacite and diorite porphyrite in the Late Triassic - Early Jurassic . The north - east structure of the area controls the spatial distribution of ore ( mineralization ) and alteration zone . There are 53 ore bodies exposed to Cu - Mo polymetallic ore bodies in the study area . Among them , 12 ore bodies ( including 6 molybdenum ore bodies , 2 copper - molybdenum ore bodies , 1 zinc orebodies ) and 41 mineralized bodies . The total thickness of ore bodies is 26.92m , the total thickness of mineralization is 86.68m . The mineral ( geochemical ) bodies are generally in the north - south - west direction in the space , with the dip angle between 30 掳 and 40 掳 , and the depth of the orebody is stable and the thickness is not large . It is considered that the copper - molybdenum polymetallic ore deposits in the area are mainly controlled by the formation of the macroreticular formation , the north - east structure and the dilong granite . The yellow - iron serrocks in the formation of the macroreticular formation are the main ore - bearing stratum of the ore ( geochemical ) body . The volcanic activity in this area is frequent , and the late Triassic - long granite provides the heat source and the matter source for the enrichment of the copper - molybdenum metal in the region . The prospecting mark of the research area is established : 鈶

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