| 奇异性理论在弱异常信息提取中的应用—以冀北隐伏中-酸性侵入岩体为例 |
| 投稿时间：2023-09-05 修订日期：2024-02-20 点此下载全文 |
| 引用本文：张盼盼.奇异性理论在弱异常信息提取中的应用—以冀北隐伏中-酸性侵入岩体为例[J].地质与勘探,2024,60(3):505-514 |
| 摘要点击次数: 9033 |
| 全文下载次数: 4448 |
|
| 基金项目:河北省自然资源厅项目（编号：13000023P00F2D410354M）资助 |
|
| 中文摘要:冀北地区是河北省矿产资源重要聚集地之一，成矿条件优越，其中中-酸性侵入岩体与银铅锌多金属矿床成矿密切相关。然而，大量的第四系覆盖压制了一些深部及隐伏弱异常成矿信息，使得常规化探方法在该覆盖区提取效果微弱。本文运用奇异性分析及主成分分析对冀北1：20万水系沉积物常量元素化探数据进行分析处理，提取区内成矿元素弱异常，并将其与未进行奇异性处理的结果进行对比。结合区域地质背景、物化探资料圈定覆盖区内与中-酸性侵入岩体有关的异常区，对成矿作用、成矿规律进行分析、讨论，以期揭示区内元素富集规律。结果显示，上述组合方法可以有效提取元素弱异常并进行成矿有利区圈定，并且圈定位置与已知岩体位置、区域构造条件相吻合，共圈出隐伏异常点7个，推测其为成矿远景区。 |
| 中文关键词:隐伏岩体 奇异性分析 主成分分析 弱异常提取异常圈定 中-酸性侵入岩体 冀北地区 |
| |
| Application of singularity theory in the extraction of weak anomalies: A case study of hidden intermediate- acidic intrusive rocks in northern Hebei |
|
|
| Abstract:The northern Hebei Province is one of the important concentration areas of mineral resources in Hebei Province, with superior ore-forming conditions. The intermediate- -acidic intrusive rocks in north Hebei are closely related to the mineralization of silver- -lead-zinc polymetallic deposits. However, a large amount of Quaternary cover suppresses some deep and hidden weak anomaly mineralization information, making conventional geochemical methods have weak extraction effcts in this coverage area. This work conducted singularity analysis and principal component analysis to analyze and process the geochemical data of major elements in the 1: 200000 water system sediments in northern Hebei, extracted weak anomalies of ore-forming elements in the area, and compared them with the results without singularity treatment. Based on the regional geological background and geophysical and geochemical exploration data, we delineated the abnormal areas related to intermediate- acidic intrusive rock masses in the cover age area, analyzed and discussed the mineralization process and ore-forming laws in order to reveal the enrichment laws of elements in the area. The results show that the above combination method can effectively extract weak element anomalies and delineate favorable mineralization areas, and the delineated positions are consistent with the known rock mass positions and regional structural conditions. A total of seven hidden anomaly points have been delineated, which are infered to be ore-forming prospects. |
| keywords:hidden rock mass, singularity analysis, principal component analysis, weak anomaly extraction, anomaly delineation, intermediate-acidic intrusive rocks, northern Hebei Province |
| 查看全文 查看/发表评论 下载PDF阅读器 |
