本文選題：礦化類型　切入點(diǎn)：礦床成因　出處：《昆明理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：易門銅廠礦區(qū)地處揚(yáng)子陸塊西南緣康滇地軸南段的南北向易門斷裂與綠汁江斷裂夾持的地塊中,礦床產(chǎn)于中元古代易門斷陷盆地內(nèi)。銅廠礦床及其周圍的一系列銅礦床(點(diǎn)),構(gòu)成我國著名的銅礦成礦區(qū)之一—易門銅礦帶。銅廠礦床是易門銅礦帶中的Cu品位較低的大型礦床,也是易門銅礦帶東礦帶中的一個(gè)代表性礦床。本文通過詳細(xì)的礦床地質(zhì)調(diào)查研究,在查明礦區(qū)銅礦(化)體的相互穿切關(guān)系及其時(shí)空分布關(guān)系的基礎(chǔ)上,對(duì)不同類型礦石樣品開展系統(tǒng)的C、O、S、Pb同位素地球化學(xué)分析測(cè)試研究。結(jié)果表明：礦區(qū)存在兩種不同的銅礦化類型,其中,沉積-成巖型(銅廠式)銅礦,層控特征明顯,主要產(chǎn)于落雪組二段白云巖中,主要礦石礦物為斑銅礦,具“同生”礦床地質(zhì)特征；熱液脈狀型(大尖山式)銅礦穿層明顯,形成于晉寧-澄江運(yùn)動(dòng)的造山期,可見于因民組,落雪組,鵝頭廠組中,主要由黃銅礦—方解石(重晶石)脈組成,部分地段為黃銅礦—石英脈,具“后生”礦床特征；同位素組成指示,銅廠式層狀銅礦體的成礦物質(zhì)源自礦區(qū)含礦層及附近碳酸鹽地層,屬典型的沉積-成巖成因;大尖山式脈狀礦成礦流體與幔源或深部巖漿活動(dòng)有關(guān),為殼-�；旌狭黧w,成礦流體為中低溫、中低鹽度的熱液；礦床形成的壓力與深度都較小,為低壓環(huán)境下的淺成礦,屬典型的巖漿熱液成因。本文指出,易門銅廠礦床為沉積-成巖+深源熱液疊加成因的多因復(fù)成礦床,建立了該礦床的成礦模式。在空間上,兩種礦化類型組成不同的礦化組合類型區(qū),沉積-成巖型礦化區(qū)主要分布在15線以南區(qū)段及16-15線西部層狀礦體延深區(qū)。熱液脈狀礦化區(qū)主要分布于大尖山-銅廠30號(hào)勘探線區(qū)段及小馬山礦段。沉積-成巖型礦化與熱液脈狀礦化顯著疊加組合區(qū)主要位于30-15號(hào)勘探線。三種礦化組合類型區(qū)成礦特征和礦體產(chǎn)出特點(diǎn)完全不同。根據(jù)成礦規(guī)律的認(rèn)識(shí),本文提出“層狀礦-層脈疊加礦-脈狀礦三位一體”的找礦新思路,并按礦化組合類型區(qū)的不同,針對(duì)性地提出綜合找礦工程部署的總體原則,作為實(shí)現(xiàn)“貧中找富”的目標(biāo)基本思路。
[Abstract]:The Yimen Tongchang mining area is located in the block of the southern section of the Kangdian axis in the southwestern margin of the Yangtze block, which is gripped by the north-south Yimen fault and the Luzhujiang fault. The deposit occurs in the middle Proterozoic Yimen fault basin. The Tongchang deposit and a series of copper deposits around it form one of the famous copper ore deposits in China, the Yimen copper ore belt. Tongchang deposit is the copper grade in the Yimen copper ore belt. Lower large deposits, It is also a representative deposit in the east ore belt of Yimen Copper Mine Belt. Based on the detailed geological investigation and study of ore deposit, the interpenetrating shear relation of copper ore body and its spatial and temporal distribution are investigated in this paper. The isotopic geochemical analysis and study of different types of ore samples have been carried out systematically. The results show that there are two different types of copper deposits in the ore area, among which the sedimentary diagenetic type (Tongchang type) copper deposit has obvious stratabound characteristics. Mainly occurring in the dolomite of the second member of the Luoxue formation, the main ore mineral is the placenta copper deposit, which has the geological characteristics of the "syngenic" deposit, and the hydrothermal vein type (Daganshan type) copper deposit is obvious in the ore-forming period of the Jinning Chengjiang movement, which can be seen in the Yinmin formation. The Luoxue formation and the Yetouchang formation are mainly composed of chalcopyrite calcite (barite) veins, some of which are chalcopyrite quartz veins with the characteristics of "epigenetic" deposits, indicating isotopic composition, The ore-forming material of the Tongchang type layered copper deposit originates from the ore-bearing strata of the ore area and the carbonate strata nearby, and belongs to the typical sedimental-diagenetic genesis, and the ore-forming fluid of the Dadianshan type vein type is related to the mantle-derived or deep magmatic activity and belongs to the crust-mantle mixed fluid. The ore-forming fluid is hydrothermal with medium and low temperature and low salinity, and the formation pressure and depth of the deposit are small, which is a typical magmatic hydrothermal origin in the low pressure environment. The Yimen Tongchang deposit is a sedimentary diagenetic deep-source hydrothermal superimposed polygenetic complex deposit. The metallogenic model of the deposit has been established. In space, the two types of mineralization consist of different mineralization assemblage types. The sedimental-diagenetic mineralization area is mainly distributed in the south section of Line 15 and the extended area of stratiform orebody in the west of Line 16-15. The hydrothermal vein mineralization area is mainly distributed in the section of exploration line 30 of Dajianshan-Tongchang Mine and the Xiaomashan Mine. Type type mineralization and hydrothermal vein mineralization are mainly located in the prospecting line No. 30-15. The metallogenic characteristics and orebody production characteristics of the three types of mineralized assemblages are completely different. In this paper, a new idea of "stratified ore-vein superposition ore-vein ore-vein ore trinity" is put forward, and the general principles of comprehensive prospecting engineering deployment are put forward according to the different types of mineralization assemblages. As the basic idea of realizing the goal of "looking for the rich among the poor".
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.41

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