高密度电法在河北省青龙满族自治县某花岗岩矿区地质勘查中的应用
Application of high-density electrical method in geological exploration of a granite mining area in Qinglong Manchu Autonomous County,Hebei Province
赵玉立 1石宗户 1周杨1
作者信息
- 1. 天津华北地质勘查局核工业二四七大队,天津 宝坻 301800
- 折叠
摘要
介绍了应用高密度电法在河北省青龙满族自治县青龙镇某花岗岩矿区工程勘察的案例.为指导该矿区开采,需查明矿区风化层厚度、基覆面分布、破碎裂隙情况等地质条件.在 1 号、2 号、3 号矿区分别开展了高密度电法测量,结合部分钻探地质资料,认为:1)矿区浅地表大部分基岩出露,土石层覆盖部分少、厚度小;2)山脊部位风化层总体较薄(3～10 m),沟谷部位风化层总体较厚(6～50 m);3)通过明显的低阻异常圈定了多处可能的基岩裂隙或破碎区,推测为后期岩浆岩侵入挤压所致.研究成果为该区下一步的安全开采提供了重要地质依据.
Abstract
This case study introduced the application of high-density electrical method in the engineering survey of a granite mining area in Qinglong Town,Qinglong County,Hebei Province.In order to guide the mining activities in this area,it is essential to identify geological conditions such as the thickness of weathering layer,distribution of basement overburden,and the presence of broken fissures in the mining area.High-density electric method survey were carried out in No.1,No.2 and No.3 mining area respectively.Combined with geological data from drilling,the findings indicate the following:1)Most of the bedrock is exposed on the shallow surface of the mining area,with small soil and rock layer covering and small thickness;2)the weathering layer is generally thin in the ridges(3～10 m),while it is thicker in the gullies and valleys(6～50 m);3)Several potential bedrock fissure or fracture zones were identified through distinct low-resistance anomalies,presumed to be caused by the intrusion and extrusion of late-stage magmatic rocks.The research result provided an important geological basis for the next step of safe mining in the region.
关键词
高密度电法/花岗岩矿/风化层厚度/破碎裂隙/河北省青龙县Key words
high-density electrical method/granite ore/weathering layer thickness/broken fissures/Qinglong County,Hebei Province引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据