基于构造地球化学弱信息提取技术的金属矿产探测研究

doi:10.11720/wtyht.2025.1291

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摘要

为发现和识别可能富含金属矿产的区域,提出基于构造地球化学弱信息提取的金属矿产找矿方法。在确定勘查范围后,采用方格网布置采样点,对采集到的样品进行化学测试,通过静态提取、离心、动态提取的过程,提取出样品中的构造地球化学弱信息。根据提取结果分析区域内金属矿产在断裂带中的分布结果,完成金属矿产找矿。在青海省都兰县五龙沟地区无名沟—百吨沟区域开展地质勘查,利用构造地球化学弱信息提取结果,对勘查区内的地质结构进行分析,共发现17条断裂带,其中Ⅳ号断裂带可圈定一条长约为500 m的金属矿体,Ⅵ号断裂带可圈定6条180~400 m的金属矿体,Ⅺ号断裂带可圈定2条550~800 m的金属矿体,其余矿体均为盲矿体。本次构造地球化学弱信息提取在金属矿产找矿方法中的应用取得了显著的效果,满足了金属矿产找矿工作的现实需要,可在该类型地质环境的金属矿产找矿工作中进行推广应用。

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	朵德英
	刘秀峰
	李波

关键词 ：金属矿产找矿, 金属矿产, 构造地球化学弱信息, 找矿方法, 构造地球化学

Abstract：

To identify areas potentially rich in metal minerals, this study proposed a prospecting method based on tectono-geochemistry weak information extraction. After the exploration scope was determined, sampling points were arranged using a grid pattern, followed by chemical tests on the collected samples. Through static extraction, centrifugation, and dynamic extraction, weak tectono-geochemical information in the samples was extracted. Then, the distribution of metal minerals within fault zones was analyzed based on the extraction results, and thus metal mineral prospecting was completed. During the geological exploration in the Wuminggou-Baidungou area in the Wulonggou, Dulan County, Qinghai Province, the mineral structures within the exploration area were analyzed using extracted weak tectono-geochemical information. As a result, among the 17 fault zones identified, a 500 m long metal ore body was delineated in fault zone Ⅳ, six ore bodies with lengths ranging from 180 to 400 m were determined in fault zone Ⅵ, and two ore bodies with lengths ranging from 550 to 800 m were delineated in fault zone Ⅺ. The remaining ore bodies were identified as blind ore bodies. The application of tectono-geochemistry weak information extraction for metal mineral prospecting yielded significant achievements, meeting the practical needs of metal mineral exploration. This method can be widely applied to metal mineral prospecting in similar geological settings.

Key words： metal mineral exploration metal mineral weak tectono-geochemical information prospecting method tectono-geochemistry

收稿日期: 2024-07-03 修回日期: 2024-09-04 出版日期: 2025-10-20

ZTFLH:

P632

基金资助:青海省自然资源厅地质勘查基金项目(2017042039jc020);青海省自然资源厅地质勘查基金项目(2018137023jc006)

作者简介: 朵德英(1990-),男,地质矿产工程师,现从事矿产勘查找矿及科研工作。

引用本文:

朵德英, 刘秀峰, 李波. 基于构造地球化学弱信息提取技术的金属矿产探测研究[J]. 物探与化探, 2025, 49(5): 1053-1060.
DUO De-Ying, LIU Xiu-Feng, LI Bo. Metal mineral exploration based on tectono-geochemistry weak information extraction. Geophysical and Geochemical Exploration, 2025, 49(5): 1053-1060.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2025.1291 或 https://www.wutanyuhuatan.com/CN/Y2025/V49/I5/1053

Fig.1 采样点布置

Table 1 采样参数设置

Table 2 各元素检出限、相对误差范围以合格率统计

Fig.2 动态提取过程

Fig.3 研究区的交通位置

Fig.4 研究区断裂带部分展示

Fig.5 静态提取测试结果

Table 3 样本构造地球化学弱信息提取结果

Table 4 样本中各元素背景值、异常下限及弱异常分带界限

Fig.6 勘查区结构
1—第四系冲洪积物;2—晚三叠世蚀变余长花岗岩;3—晚三叠世黑云母二长花岗岩;4—中三叠世黑云母花岗闪长岩;5—中三叠世石英闪长岩;6—中三叠世闪长斑岩;7—中三叠世花岗闪长岩;8—中三叠世含暗色角闪包体花岗岩;9—晚二叠世二长花岗岩;10—早泥盆世角闪辉长岩;11—奥陶系祁漫塔格群火山岩组灰岩、硅质板岩、火山角砾岩等;12—青白口系丘吉东沟组千枚岩及结晶灰岩;13—长城系小庙组;14—古元古界金水口岩群黑云片麻岩;15—古元古界金水口岩群角闪片麻岩;16—黑云母花岗岩脉;17—地质界线;18—实测逆断层;19—性质不明断层;20—韧性剪切带;21—含金蚀变带及编号;22—勘查区;23—断裂带位置

Fig.7 金属矿产探测准确率结果

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