| 李延康,牛志国,高利锁,田金龙,赵金霞.高精度磁测在河北长凝铁矿增储中的应用研究[J].矿产勘查,2026,17(7):1219-1230 |
| 高精度磁测在河北长凝铁矿增储中的应用研究 |
| Application research of high-precision magnetic measure ment in enhancing storage of Changning iron mine in Hebei Province |
| 投稿时间：2025-02-10 |
| DOI：10.20008/j.kckc.202607009 |
| 中文关键词: 长凝铁矿 高精度磁法测量 磁异常 化极 人机交互 2.5D正反演 |
| 英文关键词: Changning iron mine high-precision magnetic method measurement magnetic anomaly polariza-tion human-machine interaction 2.5D forward inversion |
| 基金项目:本文受河北省地质勘查基金项目“河北省滦南县长凝铁(金)矿普查(2023续作)项目(13000023P00F2D410297N)，冀自然资勘[2023]056”资助。 |
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| 中文摘要: |
| 河北省长凝铁矿位于冀东有名的司家营—马城—长凝铁矿成矿带上，以往开展过多期勘查工作，矿区覆盖厚，矿体埋藏深，矿区中部已有多个工程控制矿体，但Ⅱ号主矿体延走向南北两侧钻孔均未见到矿体，增储遇到瓶颈。本研究从平面上分析了矿区航磁和地磁异常特征，对地面高精度磁测数据处理解译，圈定了成矿远景区；继而在剖面上进行了磁异常正反演及矿体推断；布置实施 3个钻孔均见到深部厚大矿体，与推断高度一致，探获铁矿资源量近 6400万 t，实现了找矿突破。研究表明:厚覆盖区铁矿平面上通过磁异常处理(化极-延拓-小波变换等)与解译，可圈定找矿远景区；剖面上利用相邻剖面、已知钻孔做为模型和约束条件，可有效减少多解性，提高见矿率；铁矿在磁负异常区采用化极(Za)曲线拟合推断矿体是可行的。研究成果为矿区后续增储工作部署提供了重要依据，对厚覆盖区铁矿勘查提供了可借鉴的方法。 |
| 英文摘要: |
| The Changning iron mine in Hebei Province is located on the famous Sijiaying-Macheng-Changning iron mine metallogenic belt in eastern Hebei Province. Multiple exploration works have been carried outin the past, and the mining area has thick coverage and deep burial of the ore body. There are already multiple proj-ects controlling the ore body in the central part of the mining area, but no ore body has been found in the drillingholes on both sides of the extension of the II main ore body, which has encountered bottlenecks in increasing stor-age. This study analyzed the characteristics of aeromagnetic and geomagnetic anomalies in the mining area from a planar perspective, processed and interpreted high-precision magnetic survey data on the ground, and delineatedthe prospective areas for mineralization; subsequently, magnetic anomaly inversion and ore body inference were con-ducted on the profile; three boreholes were arranged and implemented, all of which revealed thick and large ore bod-ies in the deep part, consistent with the inferred height. Nearly 64 million tons of iron ore resources were discovered,achieving a breakthrough in mineral exploration. Research has shown that in thick coverage areas, magneticanomaly processing (polarization extension wavelet transform, etc.) and interpretation can be used to delineate pros-pecting areas on the iron ore plane; using adjacent profiles and known boreholes as models and constraints on theprofile can effectively reduce a mbiguity and improve the ore occurrence rate; it is feasible to use polarization (Za)curve fitting to infer the ore body in the magnetic negative anomaly area of iron ore. The research results provide im-portant basis for the deployment of subsequent storage work in the mining area, and offer a reference method for ironore exploration in thick coverage areas. |
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