| 豫西董家埝构造蚀变岩型银矿物化探异常特征及找矿模型 |
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| 引用本文： | 白德胜.豫西董家埝构造蚀变岩型银矿物化探异常特征及找矿模型[J].地质与勘探,2021,57(2):241-253. |
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| 作者姓名： | 白德胜 |
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| 作者单位： | 河南省地质矿产勘查开发局第二地质矿产调查院， 郑州 |
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| 基金项目： | 河南省2014年度地质勘查基金项目 ( 豫国土资发［2015］96 号，项目编号 08) 、河南省2018年财政地质勘查（普查）项目( 豫国土资发［2018］22 号，项目编号 06)和河南省2020年财政地质勘查（普查续作）项目 ( 豫自然资发［2020］18号，项目编号 07)联合资助。 |
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| 摘 要： | 河南省西部小秦岭地区是我国非常重要的金多金属成矿区,区内豫西董家埝银矿为构造蚀变岩型矿床,是河南省西部董家埝地区小河花岗岩体南缘上发现的首个银矿床,为近年来该区域取得的重大找矿进展,其矿床规模达到大型。地质、地球物理、地球化学综合勘查技术方法获得的多元信息,提高了异常解释精度和可信度,为董家埝矿区地质找矿工作提供了充分有效的找矿思路。其找矿流程和勘查模式为:(1)1∶50000水系沉积物异常圈定找矿靶区;(2)1∶10000土壤地球化学测量及激电中梯测量缩小找矿靶区,确定断裂构造含矿性;(3)地表槽探工程控制浅部构造蚀变带和矿(化)体;(4)激电测深方法查明深部构造蚀变带和矿(化)体延伸特征;(5)布置钻探工程验证深部矿体;(6)音频大地电磁测深了解更深空间内构造蚀变带和矿(化)体分布状态,预测找矿远景。以董家埝银矿床的地质、地球物理、地球化学等多元信息特征为基础,总结和建立了该矿床找矿模式、模型,以期为矿区外围或相似地区进行类比寻找同类型银矿床提供借鉴经验和指导作用。
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| 关 键 词： | 构造蚀变带 物化探异常 找矿模型 董家埝银矿 豫西 |
| 收稿时间： | 2020/9/14 0:00:00 |
| 修稿时间： | 2021/2/9 0:00:00 |
Geophysical and geochemical anomalies and ore prospecting model for the Dongjianian structural altered rock type silver deposit in western Henan Province |
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| Bai Desheng.Geophysical and geochemical anomalies and ore prospecting model for the Dongjianian structural altered rock type silver deposit in western Henan Province[J].Geology and Prospecting,2021,57(2):241-253. |
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| Authors: | Bai Desheng |
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| Institution: | (No.2 Institute of Geological&Mineral Resources Survey of Henan,Zhengzhou,Henan 450001) |
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| Abstract: | The Xiaoqinling area in western Henan Province is a very important gold-polymetallic ore-forming area in China.The Dongjianian silver deposit in western Henan Province is a structural altered rock type deposit,which is the first silver deposit discovered on the southern margin of Xiaohe granite body in western Henan Province,and is a significant prospecting progress made in this area in recent years,with a large deposit scale.The multivariate information obtained by comprehensive exploration technology of geology,geophysics and geochemistry has improved the accuracy and credibility of anomaly interpretation,and has provided sufficient and effective prospecting ideas for geological prospecting in Dongjianian mining area.The prospecting process and exploration mode are as follows.(1)1∶50000 stream sediment anomaly is used to delineate prospecting target area.(2)1∶10000 soil geochemical surveys and IP intermediate-gradient measurements narrow the prospecting target and determine the ore-bearing potential of fault structures.(3)Surface trenching engineering controls shallow structural alteration zones and mineralized bodies.(4)The deep structural alteration zones and extension features of mineralized bodies are identified by IP sounding method.(5)Drilling engineering is deployed to verify deep orebody.(6)Audio-frequency magnetotelluric sounding understands the distribution of structural alteration zones and mineralized bodies in deeper spaces,and predicts prospecting prospects.Based on the geological,geophysics and geochemistry information of the Dongjianian silver deposit,the prospecting model and model of the deposit are summarized and established,and it is expected to provide reference experience and guidance for analogous searching for similar type silver deposits in peripheral or similar areas of mining area. |
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| Keywords: | structural altered zone geophysical-geochemical anomaly ore-prospecting model Dongjianian silver deposit western Henan Province |
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