地学前缘 ›› 2026, Vol. 33 ›› Issue (5): 260-270.DOI: 10.13745/j.esf.sf.2026.1.33

• “富铁矿成矿与勘查技术”专栏 • 上一篇    下一篇

山东省禹城市叠道富铁矿床的发现及找矿意义

沈立军1,2(), 王怀洪1, 张招崇2, 周明磊1, 朱裕振1,*(), 吕云鹤1, 刘雪1, 孙超1, 张文艳1   

  1. 1 山东省煤田地质规划勘察研究院, 山东 济南 250104
    2 中国地质大学(北京) 地质过程与成矿预测全国重点实验室, 北京 100083
  • 收稿日期:2025-11-05 修回日期:2026-01-05 出版日期:2026-09-25 发布日期:2026-07-07
  • 通信作者: *朱裕振(1985—),男,正高级工程师,主要从事地质与地球物理勘查及研究工作。E-mail: 277628696@qq.com
  • 作者简介:沈立军(1988—),男,博士研究生,主要从事地质矿产勘查及矿床学研究工作。E-mail: sdmtslj@163.com
  • 基金资助:
    国家重点研发计划项目(2022YFC2903705);山东省自然科学基金项目(ZR2022QD073);自然资源部2024年度部省合作项目(2024ZRBSHZ132);山东省煤田地质局科研专项(MTDZKY-2024-02);山东省省级地质勘查项目(鲁勘字(2022)25号)

Discovery and prospecting significance of Diedao high-grade skarn iron deposit in Yucheng City, Shandong Province

SHEN Lijun1,2(), WANG Huaihong1, ZHANG Zhaochong2, ZHOU Minglei1, ZHU Yuzhen1,*(), LÜ Yunhe1, LIU Xue1, SUN Chao1, ZHANG Wenyan1   

  1. 1 Shandong Provincial Research Institute of Coal Geology Planning and Exploration, Jinan 250104, China
    2 State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China
  • Received:2025-11-05 Revised:2026-01-05 Online:2026-09-25 Published:2026-07-07

摘要:

叠道富铁矿床位于华北板块鲁西隆起西北缘,是2023年新发现的夕卡岩型富铁矿床。矿床内富磁铁矿体呈似层状赋存于岩体与石炭系—二叠系接触带附近的含煤地层内,矿体与围岩接触较为截然;矿石矿物以磁铁矿为主,成矿元素集中,全铁含量约55%,Cu、Co等含量较低,Co与S含量显示较好的一致性。围岩蚀变以角岩化为主,夕卡岩化次之;为典型的“禹城式”夕卡岩型富铁矿床。成矿岩体为富镁、贫铁、贫钛、富钠过铝质岩石,钠长石化发育,蚀变过程中析出部分铁可能参与成矿;岩体较高的侵入层位促进了含矿热液的异地迁移富集成矿。该矿床为低缓磁异常内局部次级异常找矿成果,二维地震或广域电磁约束重磁反演,可有效识别矿致异常和岩体凸起异常,提高找矿成功率。异常东南及东部可能存在矿体剥蚀区,西侧具有较大的找矿空间。

关键词: 富铁矿, 夕卡岩, 禹城式, 找矿方法, 叠道矿床

Abstract:

The Diedao iron deposit, newly discovered in 2023, is located on the northwestern margin of the Luxi Uplift, North China Craton. It is a high-grade skarn-type iron deposit. The high-grade iron orebodies exhibit sharp contacts with the surrounding rocks and are stratified within the coal-bearing strata adjacent to the contact zone between the intrusive rock mass and the Carboniferous-Permian strata. The ore has a total iron content of approximately 55% and is dominated by magnetite. The mineralization is predominantly iron, with notably low concentrations of Cu, Co, and other elements. Cobalt and sulfur show consistent variation trends. The characteristics of the ore bodies identify it as a typical “Yucheng-type” high-grade skarn iron deposit. The ore-forming intrusive rocks are peraluminous and characterized by high Mg and Na but low Fe and Ti contents. Strong albitization is widespread in the adjacent rock mass, and this alteration process may have contributed some iron to the mineralization. The relatively high emplacement level of the intrusion facilitated the long-distance migration and subsequent mineralization of the ore-bearing hydrothermal fluids. The deposit is associated with a secondary, low-amplitude, and gentle magnetic anomaly. Integrated geophysical exploration, combining gravity and magnetic profile inversion with either 2D seismic or wide-field electromagnetic methods, can effectively distinguish magnetic anomalies caused by ore bodies and intrusive rock mass protrusions, thereby improving prospecting success rates. While the orebodies in the southeastern and eastern parts of the Diedao anomaly may have been eroded, the western area offers broader prospecting potential.

Key words: high-grade iron ore, skarn, Yucheng-Type, method of prospecting, Diedao deposit

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