本文選題：銅鈷礦床 + 地質(zhì)特征��； 參考：《成都理工大學(xué)》2017年碩士論文

【摘要】：本文依托四川地礦局四0二地質(zhì)隊(duì)“剛果(金)加丹加省KIMPE銅鈷礦床地質(zhì)詳查”項(xiàng)目為支撐,在深入總結(jié)與分析大量前人已有資料的基礎(chǔ)上,對(duì)該礦床的成礦地質(zhì)特征進(jìn)行了詳細(xì)研究。通過(guò)對(duì)與成礦密切相關(guān)的常微量元素、石英礦物包裹體、硫同位素、硅酸鹽氧同位素及氫氧同位素的特征進(jìn)行分析與對(duì)比,探討了該礦床成因,取得了如下的成果和認(rèn)識(shí):(1)KIMPE銅鈷礦床位于加丹加弧形成礦帶上,大地構(gòu)造位置處于盧菲蓮(Lufilian)弧形構(gòu)造帶外部褶皺推覆帶東部。(2)礦體主要賦存于羅安群礦山組中段(R2.2)砂質(zhì)白云巖中及構(gòu)造角礫巖中,少量賦存于頂?shù)装逄假|(zhì)板巖裂隙中。礦區(qū)主要構(gòu)造為KIMPE斷裂,控制了礦床的空間定位與該條銅鈷礦帶分布。銅鈷礦帶的內(nèi)部結(jié)構(gòu)均由砂質(zhì)白云巖、角礫巖及碳質(zhì)板巖組成,圍巖蝕變以硅化、白云石化與銅鈷礦化關(guān)系最密切。(3)銅鈷礦體的礦石礦物主要為孔雀石、水鈷礦、斑銅礦、輝銅礦、黃銅礦、硫鈷礦、硫銅鈷礦、黃鐵礦等,脈石礦物以石英、白云石、滑石、絹云母等為主。礦石以它形粒狀結(jié)構(gòu)、包含結(jié)構(gòu)、粒狀結(jié)構(gòu)、交代溶蝕結(jié)構(gòu)、分叉結(jié)構(gòu)為主,以角礫狀、浸染狀、塊狀構(gòu)造為主。礦石自然類型為以金屬硫化物型為主,次為氧化型銅鈷礦石,礦石工業(yè)類型屬白云巖型銅鈷礦石。根據(jù)成礦地質(zhì)作用的先后關(guān)系,KIMPE銅鈷礦床分為沉積階段、熱液改造階段、表生富集階段三個(gè)成礦階段。(4)成礦作用以熱液充填為主。羅安群為初始礦源層,形成于距今880Ma~750Ma年間。后期盧菲蓮(Lufilian)運(yùn)動(dòng)期間的構(gòu)造變質(zhì)作用對(duì)礦床進(jìn)行了熱液改造,造成銅鈷礦化的疊加和局部富集。當(dāng)?shù)爻渑娴慕涤炅俊鄬蛹捌淦扑閹Я己玫耐杆�、適宜的溫度以及巨大的時(shí)間跨度,使得礦床的次生氧化作用強(qiáng)烈。礦床成因類型屬于與地層、斷層關(guān)系密切的沉積-熱液改造型銅鈷礦床。上述成果和認(rèn)識(shí),對(duì)加丹加地區(qū)今后銅鈷礦床的找礦和預(yù)測(cè)工作具有重要的指導(dǎo)意義,對(duì)其它地區(qū)銅鈷礦的找礦與勘查工作也具有新的啟迪作用。
[Abstract]:Based on the project of "detailed geological investigation of KIMPE copper and cobalt deposit in KIMPE" of Sichuan Geology and Mining Bureau, based on the deep summary and analysis of a large number of existing data, The metallogenic geological characteristics of the deposit are studied in detail. Through the analysis and comparison of the characteristics of trace elements, quartz mineral inclusions, sulfur isotopes, silicate oxygen isotopes and hydrogen and oxygen isotopes closely related to mineralization, the genesis of the deposit is discussed. The following results and understandings have been obtained: the 1 ~ (-1) KIMPE copper-cobalt deposit is located in the Katanga arc metallogenic belt. The geotectonic position is located in the eastern fold nappe belt of the Lufilian arc structural belt.) the orebody mainly occurs in the middle part of the Luan Group mine formation, in the sand dolomite and in the tectonic breccia, and in the fissure of the carbonaceous slate in the roof and floor. The main structure of the ore area is the KIMPE fault, which controls the spatial location of the deposit and the distribution of the copper and cobalt ore belt. The internal structure of copper-cobalt ore belt is composed of sandy dolomite, breccia and carbonaceous slate, and the alteration of surrounding rock is silicification. The ore minerals of dolomitization and copper-cobalt orebody are mainly malachite, water-cobalt ore and porphyry ore. Chalcopyrite, sulfur-cobalt ore, copper-cobalt ore, pyrite, etc., gangue minerals to quartz, dolomite, talc, sericite and so on. The ore is characterized by its granular structure, including structure, granular structure, metasomatic dissolution structure, bifurcation structure, breccia structure, disseminated structure and block structure. The natural ore type is mainly metal sulphide type, the second is oxidized copper-cobalt ore, and the ore industry type is dolomite copper-cobalt ore type. The KIMPE copper-cobalt deposit is divided into sedimentary stage, hydrothermal reformation stage and supergenetic enrichment stage according to the relation of ore-forming geological processes. The ore-forming process is mainly filled with hydrothermal solution. Luoan Group is an initial source bed formed during the 880Ma~750Ma period. The tectonic metamorphism during the late Lufilian movement resulted in the superposition and local enrichment of copper and cobalt mineralization. Local abundant rainfall, good permeability of fault and its broken zone, suitable temperature and huge time span make the secondary oxidation of ore deposit strong. The genetic type of the deposit belongs to the sedimentary-hydrothermal reformed copper-cobalt deposit which is closely related to strata and faults. The above results and understandings have important guiding significance for the prospecting and prediction of copper and cobalt deposits in Katanga area, and also have a new enlightening role for the prospecting and exploration of copper and cobalt deposits in other areas.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P618.2

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