| 朱琳,赵丛,高俊宝,张伟,张翔.低阻覆盖条件下航空瞬变电磁、航磁数据有效信息提取技术应用研究——以新疆维权地区多金属矿为例[J].矿产勘查,2025,16(4):834-845 |
| 低阻覆盖条件下航空瞬变电磁、航磁数据有效信息提取技术应用研究——以新疆维权地区多金属矿为例 |
| Research on effective information extraction technology of airborne transient electromagnetic and aeromagnetic data under low-resistivity cover conditions: A case study of polymetallic mines in the Weiquan area, Xinjiang |
| 投稿时间：2023-06-23 |
| DOI：10.20008/j.kckc.202504014 |
| 中文关键词: 航空瞬变电磁 航磁 一维反演 磁化强度矢量反演 Fraser滤波 |
| 英文关键词: airborne transient electromagnetic aeromagnetic 1D inversion magnetization vector inversion Fraser filtering |
| 基金项目:本文受黑龙江省基金项目黑龙江省大兴安岭成矿带航电方法试验项目(KCZX-YCCZ-2015032)资助。 |
|
| 摘要点击次数: 1990 |
| 全文下载次数: 1538 |
| 中文摘要: |
| 航空瞬变电磁法在低阻体探测方面的优势使其成为多金属矿产资源勘查的重要技术手段，但超浅层低阻覆盖层的存在使得其探测深度和分辨率大幅降低。在新疆维权银铜矿区及周边区域开展航空瞬变电磁、航磁测量中，浅地表盐碱滩形成的低阻覆盖层形成了强烈的电磁响应信号，导致晚期资料的信噪比低或被淹没，使得常用的时间常数(TAU)和电阻率深度成像(RDI)计算结果反映了盐碱滩的分布特征，对区内已知矿床的异常反映不甚明显，探测深度和效果大打折扣。本文利用航空瞬变电磁法一维反演、磁化强度矢量反演和 Fraser滤波等数据处理技术对研究区数据进行再处理，深入挖掘有效的异常信息，经综合分析，对已知矿床异常特征反映明显且发现了新的找矿线索，取得了较好的效果。 |
| 英文摘要: |
| The advantage of the airborne transient electromagnetic method in detecting low-resistivity bodiesmakes it an important technical means for the exploration of polymetallic mineral resources. However, the presenceof ultra-shallow low-resistivity overburden significantly reduces its detection depth and resolution. During the air-borne transient electromagnetic and aeromagnetic surveys in the Weiquan silver-copper mining area and its sur-rounding regions in Xinjiang, the low-resistivity overburden formed by the shallow surface saline-alkali flats gener-ated strong electromagnetic response signals. As a result, the signal-to-noise ratio of the late-stage data was low orthe data was submerged. The calculation results of the commonly used time constant (TAU) and resistivity depth im-aging (RDI) reflected the distribution characteristics of the saline-alkali flats, and the anomalies of the known oredeposits in the area were not clearly shown, which greatly reduced the detection depth and effectiveness. In thisstudy, data processing techniques such as one-dimensional inversion of airborne transient electromagnetic data,magnetization vector inversion, and Fraser filtering were used to reprocess the data in the study area to deeply ex-tract effective anomaly information. Through comprehensive analysis, the anomaly characteristics of the known oredeposits were clearly reflected, and new ore-prospecting clues were discovered, achieving good results. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |