山东省齐河—禹城地区矽卡岩型铁矿成矿预测
投稿时间:2019-11-08  修订日期:2020-01-03  点此下载全文
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郝兴中 山东省地质调查院 57820696@qq.com 
基金项目:本文由中国地质调查局全国重要矿集区找矿预测项目(编号:DD2016005223)和重要锡、锰等矿集区矿产地质调查(编号:DD20190166)和山东省自然资源厅(鲁勘字2019-1)项目联合资助。
中文摘要:山东省德州市齐河—禹城深覆盖区发育有明显的航磁异常和重力异常;近年来地勘单位对该区地球物理异常进行综合研究认为该区具有良好的矽卡岩型铁矿成矿地质条件。通过系统的异常查证工作,在研究区深部揭露了多处矽卡岩型铁矿床,从而找矿工作取得了重大突破,同时科研工作也取得了较大进展。本文旨在通过综合分析区内勘查研究成果进行成矿预测,以期指导区内今后矽卡岩型铁矿勘查工作。勘查工作表明研究区内铁矿体总体表现为“地层、侵入岩和构造”三者联合控矿的特征,即铁矿体赋存于奥陶纪(及石炭纪—二叠纪)地层中、燕山晚期闪长岩体中、奥陶纪(及石炭纪—二叠纪)地层和侵入岩体接触带处附近;通过分析该区赋矿地层、成矿地质体及控矿构造等主要控矿因素,并在对比区内重磁异常和铁矿体相关性的基础上,建立了研究区矽卡岩型铁矿综合找矿预测模型。在对该区地质矿产特征、重力场特征、磁场特征等方面综合分析的基础上进行了成矿预测工作,圈定了李屯、潘店、大张3个Ⅰ级铁矿找矿靶区和薛官屯Ⅲ级铁矿找矿靶区。同时,进一步圈定了李楼西、石庄、郭店村、丁寺东南、大张村、朱庄南共6个最小预测区,本次成矿预测研究工作为今后区内矽卡岩型铁矿找矿工作指明了方向。
中文关键词:齐河—禹城  矽卡岩型铁矿  重力异常  磁异常  成矿预测
 
Metallogenic Prognosis of Skarn-Type Iron Ore in Qihe-Yucheng Area, Shandong Province
Abstract:Abstract: There are obvious aeromagnetic and gravity anomalies in Qihe-Yucheng deep coverage area of Dezhou City, Shandong Province. In recent years, the geological exploration units have made a comprehensive study of the geophysical anomalies in the area, and it is showed that this area has good ore-forming geological conditions of skarn-type iron ore. With the systematic anomaly verification, several skarn-type iron deposits have been exposed in the deep part of the study area, which has made a great breakthrough in the prospecting work and made great progresses in scientific research. The purpose of this paper is to make metallogenic prediction through comprehensive analysis of the results of exploration and research in the area, so as to guide the exploration work of skarn-type iron ore in the future. The exploration work shows that the iron ore bodies in the study area are generally characterized combined ore-controlling by "strata, intrusive rocks and structures", that is, the iron ore bodies occur in the Ordovician (Carboniferous, Permian) strata, the diorite bodies in the late Yanshanian, in the near contact zone between Ordovician (Carboniferous, Permian) strata and intrusive rock bodies. The paper established the comprehensive ore prospecting prediction model of skarn-type iron ore in the study area, based on the analysis of the key ore-controlling factors such as ore-bearing strata, ore-forming geological bodies and ore-controlling structures, and the correlation among the gravity, magnetic anomalies and iron ore bodies. Based on the comprehensive analysis of the geological and mineral characteristics, gravity field characteristics and magnetic field characteristics of the area, the metallogenic prediction work is carried out, and this study delineates three I degree iron ore prospecting target areas of Litun, Pandian and Dazhang and Xueguantun Ⅲ degree iron ore prospecting target area. At the same time, this paper further delineated 6 minimum prediction areas, including western Lilou, Shizhuang, Guodian village, southeast Dingsi, Dazhang village, southern Zhuzhuang minimum prediction areas. This metallogenic prediction research work points out the direction for the prospecting of skarn-type iron ore in the future.
keywords:Qihe-Yucheng  Skarn-type iron ore  gravity anomaly  magnetic anomaly  metallogenic prognosis
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