本文選題：大寶山礦區(qū) + 斑巖型鉬礦床��； 參考：《中國地質(zhì)科學(xué)院》2015年碩士論文

【摘要】：廣東大寶山銅鉬多金屬礦床是我國南嶺地區(qū)重要的多金屬硫化物礦床之一,近年來,隨著全國危機(jī)礦山接替資源找礦項(xiàng)目不斷深入,國家及礦山部門逐步加大了對礦區(qū)深部及外圍找礦工作的投入,取得的豐碩的研究成果。本文在查閱前人研究資料的基礎(chǔ)上,發(fā)現(xiàn)其中仍存在一定的遺漏,前人尚未對礦區(qū)內(nèi)的主要控礦構(gòu)造特征和圍巖蝕變與礦化和礦體之間的空間關(guān)系進(jìn)行細(xì)致厘定。因此,本文選用“廣東大寶山鉬多金屬礦床構(gòu)造蝕變調(diào)查與找礦預(yù)測”為題,來對前人研究進(jìn)行簡單補(bǔ)充,并為后期的科研和生產(chǎn)提供重要的參考價(jià)值。 在礦區(qū)內(nèi)2條總長約1.6km的構(gòu)造-蝕變-巖相實(shí)測剖面基礎(chǔ)上,系統(tǒng)開展了巖相及巖石學(xué)研究,建立相應(yīng)的蝕變礦物組合,并以此為填圖單元修編了面積約為3km2的“大寶山礦區(qū)構(gòu)造蝕變巖相圖”。同時(shí)結(jié)合構(gòu)造演化與巖漿活動(dòng)關(guān)系,進(jìn)一步探討了大寶山礦區(qū)深部及外圍的找礦預(yù)測研究。論文取得以下主要成果及進(jìn)展： 1、從斷裂構(gòu)造控礦入手,通過詳細(xì)的構(gòu)造特征觀察,認(rèn)為大寶山礦區(qū)似層狀銅多金屬硫化物礦床賦礦斷裂以北北西向斷裂帶為主,從構(gòu)造動(dòng)演化特征,解釋控礦構(gòu)造形式、性質(zhì)以及疊加復(fù)合對成礦的控制,較系統(tǒng)地研究各類控礦構(gòu)造特征。 2、在大寶山銅鉬多金屬礦床“灰?guī)r(泥質(zhì)灰?guī)r、泥質(zhì)粉砂巖)層位+燕山期的花崗質(zhì)巖漿+NNW向斷裂破碎帶”的“三位一體”及蝕變帶的四維控礦條件下,解釋了夕卡巖型銅多金屬硫化物礦床產(chǎn)出有利因素。 3、通過實(shí)測礦區(qū)內(nèi)2條典型地質(zhì)剖面,對剖面中不同類型蝕變巖進(jìn)行巖石學(xué)、礦物學(xué)研究,從巖石的礦物組成及結(jié)構(gòu)構(gòu)造等角度,厘定了礦區(qū)南北采場發(fā)育的礦化蝕變帶。系統(tǒng)提出不同類型蝕變帶的野外劃分標(biāo)志,包括各蝕變巖的顏色、結(jié)構(gòu)、構(gòu)造、產(chǎn)狀和礦物組合特征等。以此為基礎(chǔ)修編了大寶山礦區(qū)1：5000大比例尺構(gòu)造蝕變巖相圖。 4、建立了由礦化中心向外以“透閃石一陽起石矽卡巖帶→透輝石矽卡巖帶→弱矽卡巖化帶→硅化帶或大理巖化帶”為找礦標(biāo)志的蝕變分帶模型。指導(dǎo)礦區(qū)深部找礦預(yù)測工作。 5.首選白面山地區(qū)作為大寶山礦田內(nèi)重要找礦遠(yuǎn)景區(qū),完成該地區(qū)1：5000大比例尺構(gòu)造-蝕變-礦化-巖相填圖,在此過程中建立起白面山找礦預(yù)測區(qū)的找礦標(biāo)志,從而確認(rèn)在該地區(qū)榕樹下一帶深部可能存在中-低溫夕卡巖型鉛、鋅、銀多金屬礦床。
[Abstract]:The Dabaoshan copper-molybdenum polymetallic deposit in Guangdong is one of the important polymetallic sulfide deposits in Nanling area of China. The state and the mining department have gradually increased the investment in the deep and peripheral prospecting work of the mining area, and obtained fruitful research results. On the basis of consulting the previous research data, it is found that there are still some omissions, and the main ore-controlling structure characteristics and the spatial relationship between the wall rock alteration and mineralization and orebody have not been determined in detail. Therefore, this paper selects "structural alteration investigation and Prospecting Prediction of the Molybdenum Polymetallic Deposit in Dabaoshan, Guangdong Province" as the title, to make a simple supplement to the previous research, and to provide important reference value for the later scientific research and production. Based on two 1.6km tectonic-alteration lithofacies profiles in the mining area, lithofacies and petrology are systematically studied, and the corresponding altered mineral assemblages are established. The structural alteration lithofacies map of Dabaoshan mining area with an area of about 3km2 has been compiled by using this method as a mapping unit. Combined with the relationship between tectonic evolution and magmatic activity, the ore-prospecting prediction in the deep and outer parts of Dabaoshan mining area is further discussed. The main achievements and progress in this paper are as follows: 1. Starting from the ore-control of fault structures and observing the detailed structural characteristics, it is considered that the NW fault zone of the ore-bearing deposits in the Dabaoshan copper polymetallic sulphide deposit is the main one. From the characteristics of tectonic dynamic evolution, explanation of ore-controlling structure form, property and superimposed composite control on metallogeny, the characteristics of various ore-controlling structures are systematically studied. 2. In the Dabaoshan copper-molybdenum polymetallic deposit, "limestone" (argillaceous limestone), The "Trinity" of the Yanshanian granitic magma NNW fracture zone and the four dimensional ore-controlling condition of the altered zone are studied in this paper. The favorable factors for the occurrence of skarn copper polymetallic sulphide deposits are explained. 3. The petrology and mineralogy of different types of altered rocks in the profile are studied by measuring two typical geological sections in the mining area. According to the mineral composition and structural structure of rocks, the mineralized alteration zones developed in the north and south stope of the mining area are determined. The field classification marks of different types of altered zones are proposed systematically, including the color, structure, occurrence and mineral assemblage characteristics of each altered rock. Based on this, a 1: 5000 scale structural altered lithofacies map of Dabaoshan mining area was compiled. 4. The weakly skarn belt of diopside skarn belt with "tremolite-actinite skarn belt" from the mineralization center was established The alteration zoning model of the silicification zone or marble belt "is the ore-prospecting marker." Guide the deep prospecting and prediction work in mining area. 5. The first choice of Baimianshan area as an important ore prospecting area in the Dabaoshan Orefield is to complete the mapping of 1: 5000 large scale tectonics, alteration, mineralization and lithofacies in this area. In the process, the prospecting criteria of the prospecting and predicting area of Baimanshan are established. It is confirmed that there may be skarn type lead, zinc and silver polymetallic deposits in the deep part of Yaoshuxia area.
【學(xué)位授予單位】：中國地質(zhì)科學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.2

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本文編號：2050715