投稿时间：2024-09-02
修订日期：2025-07-07
网络发布日期：2025-08-26
中文摘要:富铁矿是中国最紧缺的大宗金属矿产资源之一。冀东地区是中国沉积变质型铁矿的第二大产区，目前查明的富铁矿资源量接近大型规模。文章通过对冀东5个主要成矿区带典型矿床铁物相特征和富铁矿床地质特征研究，发现富铁矿体分布受后期断裂控制明显；富铁矿石一般产出于厚大贫铁矿层中，富铁矿体与顶底板贫铁矿呈相对渐变关系，特别是杏山和马城铁矿富铁矿石一般分布在厚大准富铁矿(w（TFe）=40%~45%)层中，司家营铁矿有独立产出的富铁矿体分布；富铁矿石和贫铁矿石脉石矿物种类基本一致，最大区别就是富铁矿石相对贫铁矿石低硅富铁。富铁矿石可明显分为2类，一类平均w（SiO2）为17.04%~34.46%；另一类平均w（SiO2）为5.64%~7.09%，且低硅富矿分布在高硅富矿中，以高硅富铁矿为主。结合前人的研究成果，笔者提出冀东富铁矿的成因是原生沉积时相对较富，并进一步通过变质期后碱性热液叠加导致去硅富铁形成富铁矿，故笔者认为滦县司家营铁矿南区仍有较大富铁矿找矿潜力。
Abstract:High-grade iron ore is one of the most important bulk metal minerals in China. The eastern Hebei Province is the second largest cluster of BIF-hosted magnetite iron deposits in China, the currently identified high-grade iron ore resources approach large-scale deposits. On the basis of studying the ferrum phases and geological chara-cteristics of typical deposits in five main metallogenic belts in eastern Hebei Province, this paper shows that the distribution of the high-grade iron deposits are obviously controlled by the late-stage faults. High-grade iron deposits are mainly produced within the large, thick, and low-grade iron ore beds, and have a gradual transition relationship with low-grade iron ore beds at the hanging wall and footwall, especially the Xingshan iron deposit and Macheng iron deposit, where high-grade iron ores are usually distributed within the large and thick sub-high-grade iron beds with TFe 40%～45%; standing alone high-grade iron orebodies were identified in the Sijiaying iron deposit. The gangue minerals are generally similar in the high-grade iron ores and the low-grade iron ores, the greatest difference between them is that the high-grade iron ores have lower Si and higher Fe contents than the low-grade iron ores. The high-grade iron ores can be divided into two groups, one of which the average SiO2contents are in the range of 17.04%~34.46%, while the other is of 5.64%~7.09%. The high-grade iron ores with lower Si are mainly distributed in high-grade iron ores with higher Si which predominates the orebody. In combination with previous studies, this paper puts forward that the iron is more abundant in the process of primary sediments, and further enriched by the superposition of alkaline hydrothermal fluids after the metamorphic stages which resulted in leaching Si and concentrating Fe. According to the geological and physical data, this paper also analyzes the further ore-prospecting directions of high-grade iron ores, and proposes that attention should be paid to the south of the Sijiaying iron deposit in the Luanxian area.
keywords:BIF-hosted iron deposit high-grade iron ore genesis type prospecting progress eastern Hebei Province
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基金项目:本文得到河北省地矿局地质科技项目（编号：13000023P0069B410214D、13000025P003294103437）联合资助
引用文本：
崔伟,张招崇,董国明,崔丽男,曹瑞明.2025.冀东沉积变质型富铁矿床成矿特征及远景分析[J].矿床地质,44(4):869~887CUI Wei,ZHANG ZhaoChong,DONG GuoMing,CUI LiNan,CAO RuiMing.2025.Metallogenic characteristics and prospectivity of BIF-hosted high-grade iron deposits in eastern Hebei Province[J].Mineral Deposits44(4):869~887
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