本文選題：西藏 + 拿若銅礦床��； 參考：《成都理工大學(xué)》2015年碩士論文

【摘要】：西藏拿若銅礦床位于羌塘-三江復(fù)合地體板片南緣,班公湖-怒江縫合帶的北側(cè),是班怒成礦帶多龍礦集區(qū)的重要礦床。拿若銅礦床前人研究多集中在成礦年代學(xué)、流體包裹體、礦石、礦化蝕變、成礦元素、物化探異常等方面,地質(zhì)特征研究極少。而礦體地質(zhì)特征又是地質(zhì)特征的核心部分,是成礦作用、控礦構(gòu)造、成礦結(jié)構(gòu)面、礦床類型、找礦方向等判定的最基本約束,是進一步解決勘察方向、增加儲量的重要依據(jù)。筆者在全面收集拿若銅礦床相關(guān)研究與勘查成果資料的基礎(chǔ)上,根據(jù)野外考察獲得的礦區(qū)構(gòu)造格架、變形樣式組合,控礦構(gòu)造、結(jié)構(gòu)面系統(tǒng)的認(rèn)識;相關(guān)地質(zhì)體的形成規(guī)律,充分考慮相鄰探礦工程對地質(zhì)體圈連的約束,運用平面幾何學(xué)、立體幾何原理,對礦(化)體等地質(zhì)特征進行立體解析、統(tǒng)計分析,取得如下認(rèn)識:(1)拿若礦體位于鐵格隆山推覆構(gòu)造扇北扇體的前部帶,變形組合樣式為系列“Z”型從屬褶皺構(gòu)成的同斜-斜歪褶皺沖斷系;(2)拿若銅礦床成巖、成礦均受推覆構(gòu)造前部帶褶皺系控制;成礦結(jié)構(gòu)面為南傾的軸面節(jié)理、層面及層間剪切節(jié)理;(3)巖漿、成礦流體均有自南部深處向北部淺處運移的趨勢,在淺部均具指狀突進特點;(4)成巖、成礦均發(fā)生于變形后,成礦晚于巖漿侵位,巖體及圍巖均可容礦,巖體并非全巖礦化。綜合以上認(rèn)識,推斷拿若礦區(qū)的礦床成因類型大致屬于與淺成-超淺成中酸性斑巖體有關(guān)的熱液礦床。結(jié)合工程控制情況,在礦區(qū)深部仍有找礦潛力,西南部隱爆角礫巖邊部未得到工程控制,在該區(qū)繼續(xù)尋找與隱爆相關(guān)的礦體具有較大潛力。
[Abstract]:The Nauro copper deposit in Tibet is located in the southern margin of the Qiangtang-Sanjiang composite terrane and the northern side of the Bangong Lake-Nujiang suture zone. It is an important deposit in the Dulong ore concentration area of the Banwucheng belt. Previous studies of Naoruo copper deposit mainly focus on metallogenic chronology, fluid inclusions, ores, mineralization alteration, ore-forming elements, geophysical and geochemical anomalies and so on. The geological characteristics of orebodies are the core of geological features, which are the most basic constraints for the determination of ore-forming processes, ore-controlling structures, ore-forming structural planes, ore deposit types and ore-prospecting directions, which are the important basis for further solving the prospecting direction and increasing reserves. On the basis of collecting the related research and exploration results of Nauro copper deposit in an all-round way, the author based on the structural framework, deformation pattern combination, ore-controlling structure and structural plane system of the mining area obtained from field investigation, and the formation law of related geological bodies, Taking fully into account the constraints of adjacent prospecting projects on the contiguity of geological bodies, using the theory of plane geometry and solid geometry, the geological characteristics of ore (chemical) bodies are analyzed in three-dimensional and statistical analysis. The results are as follows: (1) the Naoro orebody is located in the front zone of the northern fan of the Tiegelong mountain nappe, and the deformation and combination style is a series of "Z" type subordinate folds, the synclinal-oblique fold thrust system Jianguo 2) of the Naoluo copper deposit, The ore-forming is controlled by the fold system in the front zone of nappe structure, the ore-forming structure plane is axial joint of southward inclination, the layer and interlaminar shear joint is 3) magma, and the ore-forming fluid is moving from the southern depth to the northern shallow place, and the ore-forming fluid has the tendency of moving from the deep in the south to the shallow place in the north. In the shallow part, there are finger protrusions. The ore-forming occurs after deformation, the mineralization is later than the magma emplacement, the rock mass and the surrounding rock can hold the ore, and the rock mass is not the whole rock mineralization. Based on the above understanding, it is inferred that the genetic types of the Naolo ore deposit are mainly hydrothermal deposits related to the epigenetic and ultra-superficial intermediate-acid porphyry bodies. Combined with the engineering control situation, there is still prospecting potential in the deep part of the mining area, while the edge of the crypto-explosive breccia in the southwest is not controlled by engineering, and it has great potential to continue to search for the orebody related to the hidden explosion in this area.
【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

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本文編號：1925709