本文選題：六九銅礦　切入點：成礦地質特征　出處：《石家莊經(jīng)濟學院》2015年碩士論文　論文類型：學位論文

【摘要】：本文以黑龍江省龍江縣六九銅銀礦床為研究對象,依托“黑龍江省龍江縣后六九山地區(qū)銅金礦詳查”項目,運用野外大比例尺地質填圖、物化探異常特征分析、槽探、淺井、鉆探等野外工作方法及室內巖、礦光薄片鑒定,系統(tǒng)研究了成礦區(qū)內地層、構造、巖漿巖的分布、規(guī)模、產(chǎn)狀等成礦地質條件,在此基礎上,重點對六九銅銀礦床的控礦構造、含礦巖系特征、礦體與侵入巖的關系、礦石礦物組成及礦石結構構造、圍巖蝕變特征進行深入的研究,查明了六九銅銀礦床的成礦地質特征及礦化標志。通過研究工作,獲得了以下主要結論。1.六九銅銀礦床位于松遼盆地西緣北北東向早白堊世中性—酸性火山巖帶內,區(qū)內斷裂構造為巖漿活動提供了空間和動力。研究表明：區(qū)內華力西晚期和中燕山晚期巖漿巖分布廣泛,其中中燕山晚期花崗斑巖是本區(qū)銅礦的主要成礦母巖,對成礦作用起著控制作用。2.六九銅銀礦區(qū)位于后六九-前六九山北西向斷裂帶與西六九山-前六九山東西向斷裂帶的交會處,即前六九山火山機構的南部。礦床受基底東西向斷裂破碎帶與火山隱爆角礫巖帶的復合構造部位控制,礦體產(chǎn)于該火山隱爆角礫巖中。3.礦區(qū)圍巖蝕變較強,該蝕變帶主要發(fā)育于隱爆角礫巖中,規(guī)模也與隱爆角礫巖相當。主要蝕變?yōu)楣杌�、絹云母�?礦化為黃銅礦化、黃鐵礦化、褐鐵礦化等。4.六九銅銀礦礦床的化探異常由Au、Ag、Cu、Pb、Zn、Mo六種元素的單元素異常組成,該異常呈北東向不規(guī)則狀展布,異常套合緊密,強度高,規(guī)模大。當化探異常與激電異常吻合時,可作為直接找礦標志。5.礦體主要產(chǎn)在隱爆角礫巖中,呈不規(guī)則脈狀、透鏡狀產(chǎn)出。礦石礦物主要為黃鐵礦、黃銅礦、閃鋅礦,礦石結構主要為他形粒狀結構、固溶體分離結構、包含結構以及由充填作用形成的脈狀結構等,礦石的構造主要為塊狀構造、浸染狀構造和角礫狀構造。6.根據(jù)成礦地質條件、礦體產(chǎn)出特征、控礦構造、圍巖蝕變等特征,初步認為本礦床為中低溫熱液充填型銅銀礦床,成礦時代為中燕山晚期。
[Abstract]:Taking the Liujiu copper and silver deposit in Longjiang County, Heilongjiang Province as the research object and relying on the project of "detailed investigation of copper and gold deposits in Houliujiushan area, Longjiang County, Heilongjiang Province", this paper applies field large-scale geological mapping, geophysical and geochemical exploration anomaly analysis, trough exploration, shallow wells, etc. On the basis of field working methods such as drilling and identification of indoor rocks and thin sections of ore deposits, the distribution, scale and occurrence of ore-forming geological conditions such as the interior layers, structures, magmatic rocks, etc., the ore-controlling structures of the Liujiu copper and silver deposit are emphasized. The characteristics of ore-bearing rock series, the relationship between ore bodies and intrusive rocks, the mineral composition and structure of ores, and the alteration characteristics of surrounding rock are studied in depth, and the ore-forming geological characteristics and mineralization marks of Liujiu copper silver deposit are found out. The main conclusions are as follows: 1.The Liujiu Cu-Ag deposit is located in the early Cretaceous Neutral-acid volcanic rock belt in the west margin of Songliao Basin. The fault tectonics in the area provide space and power for magmatic activity. The study shows that magmatic rocks are widely distributed in the late Variscan and the late Middle Yanshanian, in which granitic porphyry is the main ore-forming parent rock of copper deposits in this area. The ore-forming process is controlled by .2.69-Cu-Ag ore area, which is located at the intersection of the NW fault zone of the Houliu-Qiujiushan fault zone and the east-west fault zone of the west Liujiushan-QianLiujiushan fault zone. The ore deposit is controlled by the composite structural position of the fault fracture zone of the east west direction of the basement and the volcanic cryptoexplosive breccia zone, and the orebody occurs in the volcanic cryptoexplosive breccia. 3. The wall rock of the mining area is altered strongly. The alteration zone is mainly developed in crypto-explosive breccia and its scale is similar to that of crypto-explosive breccia. The main alteration is silicification sericite mineralization chalcopyrite and pyrite. The geochemical anomaly of Liujiu Cu-Ag deposit is composed of the single element anomaly of six elements of Au-Ag-Ag-Cu-PbPb-Zn-Mo. The anomaly distributes irregularly from north to east, and the anomalous casing is tight, the intensity is high, and the scale is large. When the geochemical anomaly coincides with the anomalous ionization, the geochemical anomaly is in good agreement with the induced electric anomaly. The ore body mainly occurs in cryptoexplosive breccia with irregular veins and lenticular appearance. The ore minerals are mainly pyrite, chalcopyrite, sphalerite, and the ore structure is mainly heteromorphic granular structure and solid solution separation structure, the ore is mainly composed of pyrite, chalcopyrite and sphalerite, and the ore body is mainly composed of pyrite, chalcopyrite and sphalerite. Including structure and vein structure formed by filling, ore structure mainly consists of block structure, disseminated structure and breccia structure .6.According to ore-forming geological conditions, orebody production characteristics, ore-controlling structure, wall rock alteration and so on, It is preliminarily considered that the deposit is of middle and low temperature hydrothermal filling copper silver deposit, and the metallogenic age is the late Yanshanian period.
【學位授予單位】：石家莊經(jīng)濟學院
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.41;P618.52

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