新疆东天山百灵山铁矿地质特征及其成因探究
发布时间：2018-11-24 07:50
【摘要】：百灵山地区隶属新疆鄯善县,区内规模较大的铁矿有铁岭、红云滩、赤龙峰和百灵山铁矿。它们大多发现于20世纪60~70年代的“铁矿会战”。在成因上,主要有两种认识,一为岩浆热液型;二为海相火山喷发沉积型(新疆地矿局第一地质大队,1978;祁志明等,1985;历小钧等,1999;张红英,2000)。本论文在前人研究的基础上,对百灵山铁矿进行了详细的野外调研和室内综合分析,重点研究了矿床地质特征、矿物学和地球化学特征,揭示了百灵山铁矿的成矿构造背景、成矿物质来源以及矿床成因等问题,并得到以下认识:1、百灵山铁矿矿体主要以层状、似层状和透镜状赋存于底坎尔组第一岩性段和第二岩性段,矿石类型主要有块状、条带状、以及少量浸染状,并且铁矿明显受断裂的控制,围岩与矿体之间具有清楚的接触界线,这指示了此类矿石可能是铁矿浆直接贯入围岩中形成的。2、百灵山磁铁矿在Ti O2-AL2O3-(MgO+MnO)图解中主要落在了交代热液型铁矿区域,成矿温度在300℃-400℃之间,具有明显的热液交代型成矿特点。3、百灵山铁矿中δ34S值为0.4‰-1.68‰之间,平均值为1.0425‰,δ18O(SMOW)值在1.4‰~2.3‰之间,均指示出正常幔源的特征,表明百灵山矿床中的磁铁矿为原始岩浆产物。4、百灵山磁铁矿的总稀土元素含量较低,分配模式为轻稀土相对富集、重稀土相对亏损的右倾型,总体上表明轻重稀土之间发生了明显的分异作用;百灵山磁铁矿的δEu的变化范围为0.22-1.89,平均值0.695,δCe为0.74-0.9,整体显示较弱的负δEu异常,略负δCe异常,表明该区域铁矿成矿环境为还原环境,具有较深的成矿物质来源,可能为下地壳或上地幔。综上所述:百灵山铁矿为岩浆-热液复合型铁矿。
[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，
本文编号：2352862
[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，
本文编号：2352862
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