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宁夏中南部铁矿地质特征及成矿规律探讨
引用本文:仲佳鑫,李欢,孙雨,张锐. 宁夏中南部铁矿地质特征及成矿规律探讨[J]. 地质与勘探, 2012, 48(5): 922-931
作者姓名:仲佳鑫  李欢  孙雨  张锐
作者单位:1. 宁夏国土资源调查监测院,宁夏银川,750004
2. 宁夏遥感测绘勘查院,宁夏银川,750021
3. 核工业北京地质研究院遥感信息与图像分析技术国家级重点实验室,北京,100029
4. 成都理工大学地球科学学院,四川成都,610059
基金项目:宁夏回族自治区探矿权采矿权使用费和价款项目“宁南弧形构造带演化与找矿前景研究项目”资助(项目编码:011)
摘    要:宁夏中南部主要包括中卫市和固原市,该区属香山一卫宁北山一固原铜、金、铁、铅锌多金属成矿带,也是宁夏重要的金属矿产矿集区。研究区大地构造位于北祁连褶皱系走廊过渡带东段。铁矿床类型主要有中低温热液充填交代型和地表浅部氧化淋滤型;含矿层位主要为下石炭统前黑山组、臭牛沟组以及上石炭统土坡组,其沉积建造主要为粉砂岩一泥岩建造、石英砂岩建造、碳酸盐岩建造;矿体主要沿断裂分布,呈脉状、透镜状和似层状;具有原生矿石和氧化矿石两种矿石类型。成矿物质主要来源于地层;褶皱和断裂构造为成矿流体提供了有利的运移通道和淀积空间,从而对矿体的空间展布起到了控制作用;岩浆热液和围岩蚀变对成矿物质的聚集以及重新分配、改造起到了重要的作用。

关 键 词:铁矿床  地质特征  成矿规律  宁夏中南部

Geological Characteristics and Mineralization Regularities of Iron Deposits in Central-Southern Ningxia
ZHONG Jia-xin,LI Huan,SUN Yu,ZHANG Rui. Geological Characteristics and Mineralization Regularities of Iron Deposits in Central-Southern Ningxia[J]. Geology and Prospecting, 2012, 48(5): 922-931
Authors:ZHONG Jia-xin  LI Huan  SUN Yu  ZHANG Rui
Affiliation:1. Ningxia Institute of Survey and Monitoring of Land and Resources, Yinchuan, Ningxia 750004; 2. NingXia Institute of Remote Sensing and Mapping Exploration, Yinchuan, Ningxia 750021; 3. National Key Laboratory of Remote Sensing Information and Image Analysis Technology, Beijing Research Institute of Uranium Geology,Beijing 100029; 4. College of Earth Science, Chengdu University of Technology, Chengdu, Sichuan 610059)
Abstract:Central-southern Ningxia includes Zhongwei and Guyuan cities, which is a part of the Xiangshan-Weiningbeishan-Guyuan Cu-Au-Fe-Pb-Zn polymetallic ore belt, and is also an important metal deposit concentration area. It is located in the eastern section of the North Qilian fold belt. The iron ore deposits are dominated by low-middle temperature hydrothermal metasomatic and shallow oxidative leaching ones. The orebodies mainly occurred in the lower Carboniferous Qianheishan and Chouniugou Formations and the upper Carboniferous Tupo Formation. The sedimentary formations are mainly siltstone-shale, quartz sandstone and carbonate Formations. The ore bodies are distributed along the fractures, and display vein, lenticular and bedded textures. The ores can be classified into the primary and oxidized ores. The ore-forming materials are originated from the strata. The folds and faults provided favorable fluid migration channels and deposition space, and thus controlled the spatial distribution of the ore bodies .The magmatic-hydrothermal fluid and wall rock alteration played an important role in the accumulation, redistribution and reformation of the ore-forming materials.
Keywords:iron deposit  ore-controlling factors  metallogenesis  central-southern Ningxia
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