本文關(guān)鍵詞： 大興安嶺成礦帶 銅鉬多金屬礦 成礦規(guī)律 成礦預(yù)測　出處：《吉林大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：研究區(qū)地處大興安嶺松和義有色金屬成礦帶，區(qū)內(nèi)出露地層主要為新元古界-下寒武統(tǒng)倭勒根巖群大網(wǎng)子組，該組是一套為一套淺變質(zhì)的中基（酸）性火山巖夾細(xì)碎屑巖沉積建造，巖漿巖主要是晚三疊世-早侏羅世中粗粒二長花崗巖，零星分布花崗斑巖、英安巖及閃長玢巖等。區(qū)內(nèi)北東向構(gòu)造控制了礦（化）及蝕變帶的空間展布。 研究區(qū)出露銅鉬多金屬礦體53條，其中礦體12條（主要礦體包括：鉬礦體6條、銅鉬礦體2條、鋅礦體1條）、礦化體41條。礦體總厚度26.92m，礦化體總厚度86.68m。礦（化）體在空間上總體呈北東-南西走向，，傾向南東，傾角在30°~40°之間，礦體深部沿產(chǎn)狀延深較穩(wěn)定，厚度變化不大。 研究認(rèn)為區(qū)內(nèi)銅鉬多金屬礦成礦主要受大網(wǎng)子組地層、北東向構(gòu)造及二長花崗巖綜合控制。大網(wǎng)子組地層中的黃鐵絹英巖是礦（化）體的主要賦礦層位。本區(qū)火山活動(dòng)頻繁，晚三疊世二長花崗巖為本區(qū)銅鉬金屬的富集提供了熱源和物源。 確立了研究區(qū)的找礦標(biāo)志：①地質(zhì)標(biāo)志：具有綠泥石化、綠簾石化-石英絹云母化-石英鉀長石化-黃鐵礦化等典型交代型面狀蝕變暈，在火山-構(gòu)造巖漿活動(dòng)的中心區(qū)域找尋中酸性侵入巖有關(guān)的斑巖型銅鉬礦床。②地球化學(xué)標(biāo)志：找尋地球化學(xué)組合異常套合較好、異常范圍較大的土壤地球化學(xué)異常區(qū)，如Hs-5號異常。③地球物理標(biāo)志：礦（化）體發(fā)育地段的地球物理特征屬中阻高激化區(qū)域，如本區(qū)的ηa-01號異常。 通過綜合研究與找礦標(biāo)志的總結(jié)，確定本區(qū)是找尋斑巖型銅鉬礦的有利地段，在地球化學(xué)銅鉬鉛鋅異常套合較好地段，開展槽探、鉆探工作。利用槽探對組合異常Ht-10號異常進(jìn)行了地表揭露，見礦效果較好，本區(qū)是以后地質(zhì)工作的重點(diǎn)區(qū)域，具有較好的找礦前景。通過地球物理方法圈定激電異常一處（ηa-01）,該處異常屬中阻高激化，該異常范圍大，形態(tài)規(guī)整，是找尋斑巖型銅鉬礦的有利地段。
[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 擄 and 40 擄 , 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

本文編號：1516961