發(fā)布時間：2018-06-04 05:13

  本文選題：銅廠溝鉬銅礦 + 矽卡巖　； 參考：《成都理工大學(xué)》2015年碩士論文

【摘要】：研究區(qū)云南省香格里拉縣銅廠溝鉬銅礦,大地構(gòu)造位置在青藏高原東南部的“三江”地區(qū)蜂腰地帶與歐亞板塊和岡瓦納板塊的交接處、特提斯-喜馬拉雅構(gòu)造域的東緣。區(qū)域上位于揚(yáng)子板塊與義敦島弧、松潘板塊的交接部位,是甘孜-理塘縫合帶的組成部分,具體位置在義敦島弧最南端即中甸弧。研究區(qū)內(nèi)二疊系、三疊系地層較發(fā)育,礦區(qū)分布地層主要為二疊系上統(tǒng)峨眉山玄武巖組(P3e),三疊系中統(tǒng)北衙組(T2b)及少量第四系更新統(tǒng)(Qp)、全新統(tǒng)(Qh)。分屬揚(yáng)子地層區(qū)麗江-金平地層分區(qū)的鳴音地層小區(qū)、中咱-石鼓地層小區(qū),其中三疊系北衙組是重要的含礦層。礦區(qū)為一軸向?yàn)楸睎|-南西向的背斜構(gòu)造,縱貫礦區(qū)中部,由于受后期斷裂破壞,致使背斜出露殘缺不全。礦區(qū)主干斷裂(F1)屬拉巴-銅廠-馬家埡口斷裂的一段,該斷裂沿背斜軸部通過,并控制了礦區(qū)內(nèi)巖漿巖的分布及斑巖型鉬礦體產(chǎn)狀;另一主斷裂為F2斷裂,控制了礦區(qū)矽卡巖型銅鉬礦的產(chǎn)狀;礦區(qū)內(nèi)有四條次級斷裂,主要有近東西向、北西-南東向兩組。礦區(qū)巖漿巖發(fā)育,巖漿巖主要以玄武巖為主,分布于峨眉山玄武巖組(P3e)內(nèi),侵入巖主要沿F1斷裂分布,呈小型巖株、巖脈、巖枝等零星出露,巖性主要為花崗閃長斑巖(γδπ),石英閃長玢巖(δομ),次為輝綠玢巖(βμ)。其中花崗閃長斑巖、石英閃長玢巖與鉬銅礦密切相關(guān)。礦區(qū)內(nèi)KT1礦體主要賦存于矽卡巖中,礦床工業(yè)類型為矽卡巖型,成因類型為接觸交代型銅鉬礦床。KT11礦體主要賦存于花崗閃長斑巖及其接觸帶附近的玄武巖中,礦床工業(yè)類型為斑巖型,成因類型為熱液型鉬礦床。礦區(qū)有用金屬元素以鉬、銅為主,伴生少量銀,礦床規(guī)模為中型鉬銅礦。本文通過對礦床時空分布、構(gòu)造裂隙、巖漿活動、地球化學(xué)、地球物理等的初步研究,與區(qū)域內(nèi)其他燕山期礦床對比,總結(jié)此類礦床的初步成礦規(guī)律。據(jù)礦區(qū)地球物理、地球化學(xué)成果推測,M1該磁異常強(qiáng)度不高,規(guī)模不大,但成礦地質(zhì)條件好,且有1:5萬化探Cu異常(含量大于1000×10-6),具找含銅矽卡巖礦意義;M2由于磁異常有一定規(guī)模,且1:5萬化探Cu異常已達(dá)一級含量,其西側(cè)T2b1與P3e呈斷層接觸,成礦條件良好,值得進(jìn)一步開展地質(zhì)查證;M7在磁異常西北有一1:5萬化探Cu異常(含量為1074×10-6)達(dá)一級異常含量,該磁異常具進(jìn)一步找礦意義,若沿磁異常北東方向與F1斷裂匯合處打坑道掘進(jìn),有機(jī)會見礦。礦區(qū)內(nèi)構(gòu)造豐富,在構(gòu)造密集區(qū)可能會形成深部礦藏;該地區(qū)的巖漿巖與成礦關(guān)系密切,現(xiàn)已發(fā)現(xiàn)的KT11便是位于花椒坪中部的花崗閃長斑巖侵入體與峨眉山玄武巖組的玄武巖接觸部位;北衙組的灰?guī)r在靠近花崗閃長斑巖體有矽卡巖化帶,鑒于矽卡巖型礦床特點(diǎn),在該部位可能繼續(xù)成礦。結(jié)合礦區(qū)已知工程驗(yàn)證結(jié)果、礦床成礦規(guī)律等要素,本文定位預(yù)測了礦區(qū)礦體。
[Abstract]:The tectonic position of Tongchanggou molybdenum copper deposit in Shangri-La County, Yunnan Province is located at the junction of the Beitao belt and Eurasian plate and Gondwana plate in the "Sanjiang" area in the southeast of the Qinghai-Xizang Plateau, and the eastern margin of the Tethys Himalayan tectonic domain. The area is located at the junction of Yangzi plate and Yidun island arc, Songpan plate, which is part of Ganzi-Litang suture zone, and is located at the southernmost tip of Yidun Island Arc, namely Zhongdian Arc. In the study area, the Permian and Triassic strata are relatively developed, and the distribution strata of the mining area are mainly P3eP3ehe of the Upper Permian Emeishan basalt formation, T2b of the Miocene Beiya formation of the Triassic system and a few of the Quaternary Pleistocene series Qphe, and the new formation of QHU. It belongs to the Ming Yin stratigraphic district of Lijiang-Jinping stratigraphic zone and the Zhongzan-Shigu formation of Yangzi stratigraphic area, in which the Triassic Beiya formation is an important ore-bearing formation. The mining area is an anticline structure with an axial direction of NSE-NW, which runs through the middle of the mining area and is damaged by late faults, resulting in the anticline outcropping and incomplete. The main fault of the mine belongs to the section of Laba-Tongchang-Majiayakou fault, which passes along the back inclined axis and controls the distribution of magmatic rocks and the occurrence of porphyry molybdenum ore bodies in the mining area, and the other main fault is the F2 fault. The occurrence of skarn type copper-molybdenum deposit is controlled, and there are four secondary faults in the ore area, mainly in the near east-west direction and the NW-SE direction. Magmatic rocks are developed in the mining area. The magmatic rocks are mainly basalt, distributed in Emeishan basalt formation (P3e), and intrusive rocks are mainly distributed along F1 faults, showing small rock plants, veins and branches, etc. The lithology is mainly composed of granodiorite porphyry (緯 未 蟺), quartz diorite porphyrite (未 -0 渭), and the second order is phospho-porphyrite (尾 渭). Among them, granodiorite porphyry, quartz diorite porphyrite are closely related to molybdenum copper deposit. The KT1 orebody mainly occurs in skarn, the industrial type of ore deposit is skarn type, and the genetic type is contact metasomatic copper-molybdenum deposit. KT11 orebody mainly occurs in granodiorite porphyry and basalt near its contact zone. The industrial type of deposit is porphyry type and the genetic type is hydrothermal type molybdenum deposit. The useful metal elements in the ore area are mainly molybdenum and copper, accompanied by a small amount of silver, and the scale of the deposit is medium molybdenum copper deposit. In this paper, the preliminary metallogenic regularity of this kind of deposit is summarized by comparing it with other Yanshanian deposits in the region through the preliminary study of space-time distribution, tectonic fissure, magmatic activity, geochemistry, geophysics and so on. According to the geophysical and geochemical results of the mining area, it can be inferred that the magnetic anomaly intensity is not high and the scale is not large, but the ore-forming geological conditions are good, and there are 1: 50 million geochemical prospecting Cu anomalies (content > 1000 脳 10 ~ (-6), which has the significance of finding copper-bearing skarn ore. Due to the magnetic anomaly, M _ 2 has a certain scale. Moreover, the 1: 50 000 geochemical Cu anomaly has reached the first order content, the west side of which is in fault contact with P3e, and the metallogenic conditions are good. It is worth further geological investigation to verify that there is a 1: 50 000 geochemical Cu anomaly (1074 脳 10 ~ (-6) in the northwest of the magnetic anomaly. The magnetic anomaly has the significance of further prospecting. If the excavation is made along the junction of the magnetic anomaly north to east and the F1 fault, there is a chance to see the ore. There are abundant structures in the mining area, and deep mineral deposits may be formed in the tectonically concentrated areas, where magmatic rocks are closely related to mineralization. The discovered KT11 is the contact site between granodiorite intrusions and Emeishan basalts in the middle of Zuzhiuping, and the limestone of Beiya formation has skarn belt near granodiorite, in view of the characteristics of skarn deposits. Mineralization may continue at this site. Combined with known engineering verification results and metallogenic rules of ore deposits, the orebodies are predicted in this paper.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.41;P618.65

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本文編號：1976104