本文選題：天寶山組 + 錫礦�。� 參考：《成都理工大學(xué)》2017年碩士論文

【摘要】：岔河唐家灣錫礦床位于揚子地臺西緣,安寧河斷裂帶東側(cè),區(qū)內(nèi)地層主要是由一套淺海至濱海相冒地槽火山沉積巖組成。會理地區(qū)經(jīng)歷了晉寧—澄江期大規(guī)模、高頻率的基性、酸性巖漿活動和成礦作用,巖漿活動帶來了豐富的錫、鐵、銅等成礦物質(zhì),具備良好的成礦地質(zhì)條件。通過野外地質(zhì)填圖、實測剖面、編錄鉆孔,采樣分析,對礦區(qū)地質(zhì)特征和礦床特征進行詳細研究,取得以下認(rèn)識:(1)賦礦地層為天寶山組第二段,地層中變質(zhì)砂巖、大理巖與黑云母花崗巖的外接觸帶是礦床產(chǎn)出的有利部位。礦體賦存于不同巖性層的界面間,呈似層狀、透鏡狀產(chǎn)出。黑云母花崗巖具富堿、鉀,貧鎂、鈣的特征,指示巖石屬于過鋁質(zhì)、富鉀鈣堿性—鉀玄武巖系列。黑云母花崗巖主量元素和稀土元素特征揭示花崗巖的成巖物質(zhì)主要來源于上地殼重熔的泥巖,形成環(huán)境為板內(nèi)環(huán)境。(2)岔河復(fù)背斜及區(qū)內(nèi)發(fā)育的次級近EN向背斜,為礦床提供了有利的賦礦空間。不同巖性的層間滑動面、斷層破碎帶等構(gòu)造薄弱帶,為含礦熱液的流動及成礦物質(zhì)沉淀,提供了有利條件。礦體形成后,斷層對礦體有一定破壞作用。(3)礦石的結(jié)構(gòu)構(gòu)造復(fù)雜,礦石中礦物組成變化較大,具分帶性,在內(nèi)接觸帶為簡單矽卡巖礦物組合,外接觸帶為復(fù)雜矽卡巖礦物組合。分析數(shù)據(jù)表明,錫礦品位0.3~0.8%,銅礦品位0.2~1.0%,錫、銅品位變化較大。礦石中伴生有鋅、鎢、銀等有益組分,可綜合利用。礦床成礦物質(zhì)來源于黑云母花崗巖體、天寶山組第二段地層、變質(zhì)輝綠巖,結(jié)合野外地質(zhì)調(diào)查,認(rèn)為黑云母花崗巖體分布廣、規(guī)模大,為礦床主要的成礦物質(zhì)來源。(4)在肖家火地、何家屋基一帶淺部有大量花崗巖體,這些地方的花崗巖與天寶山組地層的外接觸帶,是今后主要的找礦方向。何家屋基一帶,背斜構(gòu)造較為發(fā)育,已發(fā)現(xiàn)少量礦化點,初選為找礦靶區(qū)。
[Abstract]:The Chahe Tangjiawan tin deposit is located on the western margin of the Yangtze platform and on the east side of the Anning River fault zone. The strata in the area are mainly composed of a set of volcanic sedimentary rocks from shallow sea to coastal facies. The Huili area experienced large scale, high frequency basic, acid magmatic activity and mineralization in Jinning Chengjiang period. Magmatic activity brought abundant tin, iron, copper and other minerals, and had good metallogenic geological conditions. Through field geological mapping, measured section, cataloguing and drilling, sampling and analysis, the geological characteristics and deposit characteristics of the mining area are studied in detail. The following conclusions are obtained: the ore-bearing strata are the second stage of Tianbaoshan formation, and the metamorphic sandstone in the strata. The outer contact zone between marble and biotite granite is a favorable place for ore deposit. The orebody occurs between the interfaces of different lithologic layers and appears as laminar and lenticular. The biotite granite is characterized by alkali, potassium, poor magnesium and calcium, indicating that the rocks belong to peraluminous, K-rich calc-alkaline-potassium basalt series. The characteristics of major elements and rare earth elements of biotite granites reveal that the diagenetic material of the granite is mainly derived from the mudstone remelted in the upper crust, and the forming environment is the intraplate environment. 2) the Chahe complex anticline and the secondary en anticline developed in the area. It provides favorable ore-hosting space for the deposit. Structural weak zones such as interlaminar sliding surfaces and fault fracture zones of different lithologic properties provide favorable conditions for the flow of ore-bearing hydrothermal fluids and the precipitation of ore-forming materials. After the formation of the orebody, the fault has a certain destructive effect on the orebody. The structure and structure of the ore are complicated, the mineral composition of the ore changes greatly and the ore is zoned. The inner contact zone is a simple skarn mineral assemblage, and the outer contact zone is a complex skarn mineral association. The results show that the grade of tin ore is 0.30.80, the grade of copper is 0.21.0, and the grade of tin and copper varies greatly. The ore is accompanied by zinc, tungsten, silver and other beneficial components, which can be comprehensively utilized. The ore-forming material originates from the biotite granite body, the second member of Tianbaoshan formation, metamorphic diabase. Combined with the field geological investigation, it is considered that the biotite granite body is widely distributed and has a large scale. There are a large number of granite bodies in the shallow part of Hejiawuji area in Xiaojiahuodi. The outer contact zone between the granite and the Tianbaoshan formation is the main prospecting direction in the future. In the area of Hejiaowuji, anticline structure is relatively developed, a few mineralization points have been found, and the primary selection is the prospecting target 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】：2017
【分類號】：P618.2

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