| 郭威,刘朋,高建明,黄帅,祝玉函,马存飞,韩长城.山东省平邑地区刘家庄北岭金矿地球物理找矿预测[J].矿产勘查,2025,16(9):2128-2138 |
| 山东省平邑地区刘家庄北岭金矿地球物理找矿预测 |
| Geophysical prospecting prediction of gold mine in Beiling area of Liujiazhuang, Pingyi County, Shandong Province |
| 投稿时间：2023-11-08 |
| DOI：10.20008/j.kckc.202509006 |
| 中文关键词: 刘家庄北岭 金矿 磁法勘探 可控源音频大地电磁 找矿预测 |
| 英文关键词: Beiling area of Liujiazhuang gold mine magnetic prospecting CSAMT prospecting prediction |
| 基金项目:本文受山东能源科研项目(NMKJ2024C01ZB)资助。 |
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| 中文摘要: |
| 山东省平邑县刘家庄北岭地区金矿位于燕甘断裂带西侧、铜石杂岩体中南部，金矿成矿背景与区内中生代中偏碱性次火山杂岩体关系密切，区域内已发现评价有东大湾、磨坊沟等多处小型金矿床，表明该研究区具有良好的金矿成矿地质条件和资源潜力。针对研究区金矿化类型复杂多样且找矿方向不明确的问题，本文采用航空磁法、地面高精度磁法和可控源音频大地电磁法(CSAMT)，查明了研究区隐伏岩体和岩脉的分布，以及主要断层的产状。结果表明:研究区磁异常特征明显，可利用磁异常识别岩体和构造，根据地磁异常识别出 21条东西、北西西向异常带；断层在 CSAMT法反演的电阻率断面图上响应明显，用于研究区断层解释，其中 F-10断层在研究区内延伸约 800 m，L02线和 L05线中断层两侧岩石相对破碎，L03线中断层两侧岩石相对完整，整体向北东方向倾伏，倾角大于 50°，向深部延伸约 400 m，而 F-2断层在研究区内延伸约 1000 m，倾向北东，倾角大于 50°，向深部延伸超 600 m。通过上述研究，在研究区内预测出 1个隐爆角砾岩筒型金矿找矿远景区和 2个层状微裂隙浸染型金矿找矿远景区，为下一步找矿工作提供了地质依据。 |
| 英文摘要: |
| The gold mine in the Beiling area of Liujiazhuang, Pingyi County, Shandong Province is located onthe west of the Yangan fault zone and the south-central part of the Tongshicomposite pluton, and the metallogenicbackground of gold mine is closely related to the Mesozoic medium-alkaline subvolcanic composite pluton in thearea. Several small gold deposits, such as Dongdawan and Mofanggou, have been discovered and evaluated in the re-gion, indicating that the area possesses favorable geological conditions and resource potential for gold mineraliza-tion. To address the issues of the problems of complex and diverse gold mineralization types and unclear prospectingdirection in the study area, this paper adopts the aeromagnetic method, the ground high-precision magnetic method,and the controlled-source audio-geomagnetic method (CSAMT) to ascertain the distribution of the concealed intru-sive bodies and dikes in the study area, as well as the orientation of the major faults. The results showed that: themagnetic anomaly characteristics in the study area were obvious, which allowing for the identification of the intru-sive bodies and structures. Based on the geomagnetic anomalies, 21 east-west and north-west-west trending anoma-lous zones have been identified; the faults have obvious responses on the resistivity section maps inverted by theCSAMT method, which were used for the interpretation of the faults in the study area, specifically, the Fault F-10extends for about 800 m, and the rocks on the both sides of the faults in the lines of L02 and L05 are relatively frag-mented. The rocks on both sides of the L03 line are relatively intact. The faultas a whole dips in the north-east di-rection, with a dip angle of more than 50°, and extends to the depth of approximately 400 m, while the Fault F-2 ex-tends approximately 1,000 m, with a dip direction of north-east, with a dip angle of more than 50°, and extends tothe depth of more than 600 m. Through the aforementioned research, one hidden explosion breccia pipe-type goldprospecting zone and two stratiform microfracture-disseminated gold prospecting zoneswere predicted in the studyarea. It provides a geological basis for further prospecting work. |
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