山东德州地区矽卡岩型铁矿找矿方法研究

Prospecting methods of skarn type iron deposit in Dezhou area,Shandong Province

近年来,在山东省德州市东南部深覆盖区的矽卡岩型铁矿勘查工作取得了突破,发现了潘店、李屯、大张铁矿床,矿体厚度1. 57~97. 45 m,矿石品位为TFe 51. 82%~56. 75%、m Fe 47. 20%~51. 70%。本次研究通过总结区内勘查经验及对比找矿方法,探讨研究区铁矿找矿方法的适用性和有效性,旨在指导今后在类似地区矽卡岩型铁矿勘查工作。研究区勘查工作表明,"系统收集分析资料—面积性基岩地质编图—面积性物探测量—重点区综合物探剖面测量—成矿有利地段异常查证—铁矿资源潜力评价及综合研究工作"的勘查流程在研究区矽卡岩型铁矿勘查工作中效果显著。研究区找矿过程中"地质—磁法—重力—电法—地震—钻探—测井—综合研究"等找矿方法效果明显。在今后勘查工作要重视大比例尺高精度航空磁法测量、大比例尺"重磁电震"等综合物探剖面等手段的应用;同时要不断优化勘查方案,以深入推进类似地区铁矿勘查工作。

In recent years,the exploration breakthrough( Discovery of Pandian,Litun and Dazhang iron deposits) of skarn type iron has been made in the deep covering area in the southeast of Dezhou city,Shandong province. The ore body thickness range is 1.57-97.45 m,the ore grade is TFe 51.82%-56.75%,m Fe 47.20%-51.70%. By summarizing the exploration experience and comparative prospecting methods,this study discusses the applicability and effectiveness of iron prospecting methods in the study area,aiming to guide the exploration work of skarn type iron in similar areas in the future. The previous exploration work in the study area shows that the exploration process of "Systematic collection and analysis of data-Areal bedrock geological mapping-Areal geophysical survey-Comprehensive geophysical profile survey in key areas-Anomaly verification in ore-forming favorable areas-Potential evaluation and comprehensive research of iron ore resources"has a significant effect on the exploration work of skarn iron deposit in the study area. In the process of prospecting in the study area,"Geological,Magnetic,Gravity,Electrical,Seismic,Drilling,Logging,Comprehensive study"and other prospecting methods have obvious effect. In the future exploration work,it should be paid attention to the application of large-scale high-precision aeromagnetic survey,large-scale comprehensive geophysical profiles of "gravity,magnetic,electric,seismic,etc". At the same time,it is necessary to optimize the exploration scheme so as to further promote the iron ore exploration in similar areas.