【摘要】：百靈山地區(qū)隸屬新疆鄯善縣,區(qū)內(nèi)規(guī)模較大的鐵礦有鐵嶺、紅云灘、赤龍峰和百靈山鐵礦。它們大多發(fā)現(xiàn)于20世紀(jì)60~70年代的“鐵礦會(huì)戰(zhàn)”。在成因上,主要有兩種認(rèn)識(shí),一為巖漿熱液型;二為海相火山噴發(fā)沉積型(新疆地礦局第一地質(zhì)大隊(duì),1978;祁志明等,1985;歷小鈞等,1999;張紅英,2000)。本論文在前人研究的基礎(chǔ)上,對百靈山鐵礦進(jìn)行了詳細(xì)的野外調(diào)研和室內(nèi)綜合分析,重點(diǎn)研究了礦床地質(zhì)特征、礦物學(xué)和地球化學(xué)特征,揭示了百靈山鐵礦的成礦構(gòu)造背景、成礦物質(zhì)來源以及礦床成因等問題,并得到以下認(rèn)識(shí):1、百靈山鐵礦礦體主要以層狀、似層狀和透鏡狀賦存于底坎爾組第一巖性段和第二巖性段,礦石類型主要有塊狀、條帶狀、以及少量浸染狀,并且鐵礦明顯受斷裂的控制,圍巖與礦體之間具有清楚的接觸界線,這指示了此類礦石可能是鐵礦漿直接貫入圍巖中形成的。2、百靈山磁鐵礦在Ti O2-AL2O3-(MgO+MnO)圖解中主要落在了交代熱液型鐵礦區(qū)域,成礦溫度在300℃-400℃之間,具有明顯的熱液交代型成礦特點(diǎn)。3、百靈山鐵礦中δ34S值為0.4‰-1.68‰之間,平均值為1.0425‰,δ18O(SMOW)值在1.4‰~2.3‰之間,均指示出正常幔源的特征,表明百靈山礦床中的磁鐵礦為原始巖漿產(chǎn)物。4、百靈山磁鐵礦的總稀土元素含量較低,分配模式為輕稀土相對富集、重稀土相對虧損的右傾型,總體上表明輕重稀土之間發(fā)生了明顯的分異作用;百靈山磁鐵礦的δEu的變化范圍為0.22-1.89,平均值0.695,δCe為0.74-0.9,整體顯示較弱的負(fù)δEu異常,略負(fù)δCe異常,表明該區(qū)域鐵礦成礦環(huán)境為還原環(huán)境,具有較深的成礦物質(zhì)來源,可能為下地殼或上地幔。綜上所述:百靈山鐵礦為巖漿-熱液復(fù)合型鐵礦。
[Abstract]:The Bailingshan area belongs to Shanshan County, Xinjiang. The large iron ore deposits in the region are Tieling, Hongyun Tan, Chilong Feng and Bailing Mountain Iron Ore. Most of them were found in the iron ore battle of the 1960s and 1970s. In terms of genesis, there are mainly two kinds of understanding, one is magmatic hydrothermal type, the other is marine volcanic eruption sedimentary type (No. 1 Geological Group of Xinjiang Geology and Mining Bureau, 1978; Qi Zhiming et al., 1985; Li Xiaojun et al., 1999; Zhang Hongying, 2000). On the basis of previous studies, this paper makes a detailed field investigation and laboratory comprehensive analysis of Bailing Shan Iron Mine, focuses on the geological characteristics, mineralogical and geochemical characteristics of the deposit, and reveals the metallogenic tectonic background of Bailingshan Iron Mine. The source of the ore-forming material and the genesis of the ore deposit are discussed as follows: 1. The ore bodies of Bailingshan Iron Mine are mainly stratiform, bedded and lenticular in the first and second lithologic member of the Dikaner formation, and the ore types are mainly massive. Strip shape, and a small amount of soaking, and the iron ore is obviously controlled by the fault, and there is a clear contact line between the surrounding rock and the orebody, which indicates that the iron ore may be formed by the iron ore slurry penetrating directly into the surrounding rock. In the diagram of Ti O2-AL2O3- (MgO MnO), Bailingshan magnetite is mainly located in the metasomatic hydrothermal ore deposit area, and the ore-forming temperature is between 300 鈩，

本文編號：2352862