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。
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 this area,and it is shown that this area has good ore-forming geological conditions for forming skarn-type iron ore deposits.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 this area,so as to guide the exploration work of skarn-type iron ore deposits in the future.The exploration work shows that the iron orebodies in the study area are generally characterized by combined ore-controlling role of“strata,intrusive rocks and structures”,that is,the iron orebodies occur in the Ordovician(Carboniferous,Permian)strata,the diorite bodies of the late Yanshanian period,and near the contact zone between Ordovician(Carboniferous,Permian)strata and intrusive rock bodies.The authors established a comprehensive ore prospecting prediction model for skarn-type iron ore deposits 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 as well as the correlation between the gravity,magnetic anomalies and iron orebodies.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 was carried out,and three Grade I iron ore prospecting target areas of Litun,Pandian and Dazhang as well Grade III Xueguantun target area were delineated.At the same time,six minimum prediction areas were delineated,which included western Lilou,Shizhuang,Guodian Village,southeast Dingsi,Dazhang Village,and southern Zhuzhuang.This metallogenic prediction research work points out the direction for the prospecting of skarn-type iron ore deposits in the future.
作者
郝兴中
郑金明
刘伟
王润生
王巧云
张贵丽
HAO Xing-zhong;ZHENG Jin-ming;LIU Wei;WANG Run-sheng;WANG Qiao-yun;ZHANG Gui-li(Shandong Institute of Geological Survey,Jinan,Shandong 250014;School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083;Northwest Institute of Nuclear Technology,Xi’an,Shaanxi 710024;Shandong Institute of Geophysical&Geochemical Exploration,Jinan,Shandong 250013)
出处
《地球学报》
EI
CAS
CSCD
北大核心
2020年第2期293-302,共10页
Acta Geoscientica Sinica
基金
中国地质调查局全国重要矿集区找矿预测项目(编号:DD2016005223)
重要锡、锰等矿集区矿产地质调查项目(编号:DD20190166)
山东省自然资源厅项目(编号:鲁勘字2019-1)联合资助。
关键词
齐河—禹城
矽卡岩型铁矿
重力异常
磁异常
成矿预测
Qihe–Yucheng
skarn-type iron ore deposit
gravity anomaly
magnetic anomaly
metallogenic prognosis
作者简介
第一作者:郝兴中,男,1980年生。博士,正高级工程师。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。
