本文關(guān)鍵詞：會理縣秀水河釩鈦磁鐵礦床地質(zhì)特征及成礦規(guī)律研究　出處：《西南科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 釩鈦磁鐵礦 韻律特征 成礦規(guī)律 秀水河

【摘要】：秀水河釩鈦磁鐵礦床位于紅格礦田南東段,通過對區(qū)域地質(zhì)、礦區(qū)地質(zhì)、礦床地質(zhì)及礦石特征進(jìn)行了敘述,重點(diǎn)研究了巖(礦)體韻律特征,初步總結(jié)成礦規(guī)律。得到了以下幾點(diǎn)認(rèn)識:秀水河含礦巖體屬弱堿—堿質(zhì)、貧鈣—亞鈣、低鋁質(zhì)的鐵質(zhì)、鐵鎂質(zhì)基性—超基性巖,與紅格巖體極其相似;其在成巖期與紅格巖體屬同一大巖體,后期構(gòu)造破壞和巖漿裹切分割使其與母體分離,形成現(xiàn)在相對獨(dú)立的基性—超基性巖體。秀水河巖體的形成時代稍早于峨眉山玄武巖,但二者均屬晚二疊世產(chǎn)物,可能是巖漿演化中同源異相的產(chǎn)物。成礦物質(zhì)來源應(yīng)該是幔源富含F(xiàn)e、Ti的玄武巖漿。巖體的每個含礦層從底部到頂部,礦石結(jié)構(gòu)呈現(xiàn)出粒狀鑲嵌結(jié)構(gòu)—海綿隕鐵結(jié)構(gòu)—嵌晶結(jié)構(gòu)—填隙結(jié)構(gòu)的總體趨勢,構(gòu)造總體為致密塊狀—浸染狀的趨勢,二者體現(xiàn)出一定的相關(guān)性;礦物成分上,鐵鈦氧化物、磁黃鐵礦及橄欖石含量逐漸減少,而黃鐵礦及長石、輝石則逐漸增多;礦石化學(xué)成分與結(jié)構(gòu)構(gòu)造、礦物成分及含量之間存在一致的韻律性變化特征;而且釩鈦磁鐵礦體主要富集在每個含礦層的中下部。致密塊狀、稠密浸染狀礦石中鐵鈦氧化物比脈石礦物先結(jié)晶,而稀疏、星散浸染狀礦石中硅酸鹽礦物先結(jié)晶,因此不能將礦床簡單的劃為早期或晚期巖漿礦床。秀水河釩鈦磁鐵礦由巖漿多旋回、多期次脈動侵入形成,既存在深源分異,又存在就地結(jié)晶分異,應(yīng)屬多成因復(fù)成礦床。攀西地區(qū)含釩鈦磁鐵礦的基性—超基性巖體與峨眉山玄武巖、堿性巖構(gòu)成“三位一體”,三者共生是找礦的一個重要方向,另外需重視韻律特征良好的輝長巖—輝石巖—橄輝巖組合及碳酸鹽出露地區(qū),配合物化探手段,開展找礦工作。
[Abstract]:Xiushuihe vanadium titanomagnetite deposit is located in the south section of Hongge ore field. Through the description of regional geology, mining area geology, deposit geology and ore characteristics, the rhythmic characteristics of rock (ore) body are studied emphatically. This paper summarizes the metallogenic law and obtains the following conclusions: Xiushuihe ore-bearing rock body is weak alkali-alkali, poor in calcium and calcium, low in aluminous iron, ferromagnesis-ultrabasic rock, very similar to Hongge rock body; It belongs to the same large rock mass as the Hongge rock during diagenetic period, and is separated from the parent body by late structural failure and magmatic shearing segmentation. The Xiushuihe pluton was formed earlier than the Emeishan basalt, but both of them were the product of the late Permian. It may be the product of homologous facies in magmatic evolution. The source of the ore-forming material should be the basaltic magma which is rich in Fe and Ti in the mantle. Each ore-bearing bed of the rock body is from the bottom to the top. The ore structure shows the general trend of granular mosaic structure, spongy meteorite structure, embedded crystal structure and interstitial structure. In mineral composition, the contents of iron and titanium oxide, pyrrhotite and olivine decrease gradually, while pyrite and feldspar and pyroxene increase gradually. There is a consistent rhythmic variation between the chemical composition and structure, mineral composition and content of the ore. Moreover, the vanadium titanomagnetite is mainly concentrated in the middle and lower part of each ore-bearing layer. The silicate minerals in the dispersed disseminated ore are crystallized first, so it is not easy to classify the deposit as an early or late magmatic deposit. Xiushuihe vanadium titanomagnetite is formed by magmatic polycycle and multi-period pulsation. There is not only deep source differentiation, but also local crystallization differentiation. The basic-ultrabasic rock body of vanadium bearing titanomagnetite and the Emeishan basalt in Panxi area are composed of "trinity". Their symbiosis is an important direction of ore prospecting. In addition, attention should be paid to the diabase, pyroxenite-olivine assemblage with good rhythmic characteristics and carbonate outcrop areas, and to carry out the prospecting work by means of geochemical exploration of complexes.
【學(xué)位授予單位】：西南科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P612

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