吉林大学学报(地球科学版) ›› 2019, Vol. 49 ›› Issue (4): 982-991.doi: 10.13278/j.cnki.jjuese.20180063

• 地质与资源 • 上一篇    下一篇

鲁西齐河地区铁矿控矿特征及找矿标志

郝兴中1,2, 杨毅恒3, 李英平1, 高华丽1, 陈磊1   

  1. 1. 山东省地质调查院, 济南 250014;
    2. 中国地质大学地球科学与资源学院, 北京 100083;
    3. 北京信息科技大学理学院, 北京 100192
  • 收稿日期:2018-03-17 出版日期:2019-07-26 发布日期:2019-07-26
  • 通讯作者: 杨毅恒(1958-),男,教授,博士生导师,主要从事矿产资源数据解析和矿产资源评价工作,E-mail:Yiheng623@163.com E-mail:Yiheng623@163.com
  • 作者简介:郝兴中(1980-),男,高级工程师,博士,主要从事矿产资源评价、地球物理应用、成矿规律研究与预测工作,E-mail:57820696@qq.com
  • 基金资助:
    中国地质调查局地质调查项目（DD2016005223，DD20190166）

Ore-Controlling Characteristics and Prospecting Criteria of Iron Deposits in Qihe Area of Western Shandong

Hao Xingzhong1,2, Yang Yiheng3, Li Yingping1, Gao Huali1, Chen Lei1   

  1. 1. Shandong Institute of Geological Survey, Jinan 250014, China;
    2. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;
    3. School of Applied Sciences, Beijing Information Science and Technology University, Beijing 100192, China
  • Received:2018-03-17 Online:2019-07-26 Published:2019-07-26
  • Supported by:
    Supported by Geological Survey Project of China Geological Survey (DD2016005223, DD20190166)

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摘要： 山东省齐河县境内发育有矽卡岩型铁矿，近年来该区铁矿勘查和研究工作取得了较大进展。本文通过对研究区内铁矿勘查研究成果进行统计分析，旨在对其控矿特征和找矿标志进行探讨来促进该区铁矿找矿工作。研究区内铁矿控矿地层为奥陶纪碳酸盐岩和石炭纪-二叠纪碎屑岩地层，成矿地质体为燕山晚期中基性侵入岩体；铁矿体主要赋存于地层和岩体的接触带处，且在碳酸盐岩、碎屑岩地层中和侵入岩体中也赋存有部分铁矿体。区内铁矿体赋存类型多样，其中以接触带赋存式为主，且含有断裂充填式、层间充填式、裂隙贯入式、捕虏体构造式等。铁矿体形态复杂，呈层状、似层状、囊状、透镜状等；矿床典型蚀变分带特征为闪长岩带-蚀变闪长岩带-内矽卡岩带-铁矿体-外矽卡岩带-大理岩化带-灰岩带。该区成矿作用以接触扩散交代作用、接触渗滤交代作用为主，此外还有富矿热液充填作用等。研究区内铁矿找矿标志主要包括地层标志（奥陶纪碳酸盐岩和石炭纪-二叠纪碎屑岩地层）、岩体标志（中基性侵入岩体，且发育有钠长石化的蚀变闪长岩）、构造标志（地层与岩体接触带、构造交汇部位、层间滑脱部位、脆性裂隙部位等）、围岩蚀变标志（磁铁矿化、矽卡岩化、钠长石化、蛇纹石化、金云母化等与成矿关系密切）、地球物理标志（明显的高值磁异常和化极磁异常部位、重力异常梯度带和高-低电阻转换带）。在今后铁矿勘查过程中，需要在综合研究该区控矿特征的基础上，可利用多种找矿标志进行相互配合、互为补充和综合研究，以期达到预期勘查效果。

关键词: 鲁西, 齐河, 矽卡岩型, 铁矿, 成矿地质体, 找矿标志

Abstract: There are skarn iron deposits in Qihe County, Shandong Province. In recent years, a great progress has been made in iron ore exploration and research work in the study area. In order to promote the iron ore exploration in this area, the authors discussed the ore-controlling characteristics and prospecting criteria through statistical analysis of the iron ore exploration and research results in this area. The iron ore-controlling strata are the strata of the Ordovician carbonate rocks and Carboniferous-Permian clastic rocks. The ore-forming geological bodies are the medium-basic intrusive rocks in Late Yanshanian, and the iron ore bodies occur mainly in the contact zone of strata and rock mass, and also in some carbonate strata or the intrusive rocks. The occurrence types of iron ore are various, of which the contact belt is the main type, also including the types of fracture filling, interlayer filling, fissure penetration and xenoliths, etc. The ore bodies are complex in shape, such as layered, cystic, and lenticular. The typical alteration zoning is characterized by diorite-altered diorite-inner skarn-iron ore-outer skarn belt-marble belt-limestone. The mineralization is mainly composed of contact diffusion metasomatism and contact permeation metasomatism, including also some rich ore hydrothermal filling, etc. In this area, the iron ore prospecting criteria mainly include stratigraphic marks (Ordovician carbonate rocks and Carboniferous-Permian clastic rocks strata), intrusive rock marks (medium-basic intrusive rock mass with albitized alteration diorite), structure marks (contact zones between strata and rock mass, structure intersections, interlayer slips, brittle fractures), wall-rock alteration marks (magnetization, skarnization, albitization, serpentinization, phlogopization, etc.), and geophysical marks (obvious high value magnetic anomaly and polarization magnetic anomaly, gradient zone of gravity anomaly, high-low resistivity conversion zone). In iron ore exploration in the future, based on the comprehensive study of the ore-controlling characteristics in this area, a variety of prospecting indicators should be used to cooperate and complement each other so as to achieve the desired exploration goal.

Key words: western Shandong Province, Qihe, skarn, iron ore, ore-forming geological body, prospecting criteria

中图分类号: 

  • P618.31
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