大兴安岭北部宝兴沟金矿床地质地球物理特征与找矿模型
Gological and geophysical characteristics and prospecting model of Baoxinggou gold deposit in northern part of Great Xing'an Mountains
李向文 1刘智杰 2岳洪举 3孙桐 2杜海双 2黄继民2
作者信息
- 1. 黑龙江科技大学 矿业工程学院,哈尔滨 150022;黑龙江省昂昂溪实物地质资料野外科学观测研究站,黑龙江 齐齐哈尔 161031
- 2. 中国地质调查局哈尔滨自然资源综合调查中心,哈尔滨 150081
- 3. 黑龙江省地球物理地球化学勘查院,哈尔滨 150036
- 折叠
摘要
为进一步探究大兴安岭北部宝兴沟金矿床地质地球物理特征,便于更好地指导下步找矿工作,通过物性参数测定、综合物探剖面测量等工作,提取了地质、地球物理找矿标志,建立适合该区的找矿模型.结果表明:矿化体主要赋存于闪长(玢)岩脉与二十二站组地层接触部位,地层优于岩体;低磁场中高磁条带、高电阻率内低阻带分布区域有利于成矿,而金矿化体相对于围岩表现为明显的低阻高极化特征;矿体部位磁异常梯度变化较大并呈正负交替现象,矿体上盘一侧总体表现为正异常,矿体、脉岩顶部出现明显的峰值,梯度变化小的一侧指示其倾向方向.
Abstract
This paper aims to investigate the geological and geophysical characteristics of Baoxinggou gold deposit in the northern of the Great Xing′an Mountains for guiding mineral exploration better.The study establishes a suitable exploration model by further summarizing its geological and geophysical char-acteristics,conducting systematic measurements of physical properties and comprehensive geophysical profiles.The results indicate that mineralized bodies mainly occur at the contacting area between diorite(porphyrite)veins and the 22nd Station strata,and the strata is superior to the rock masses.The high magnetic tapes zone in low magnetic area,and the low resistivity zone within high resistivity are condu-cive to mineralization,while the gold mineralization body exhibits obvious low resistance and high polari-zation characteristics relative to the surrounding rock.There is larger magnetic anomaly gradient change with alternating positive and negative phenomena at the ore bodies,and the positive anomaly appears on one side of the hanging wall with obvious peak values at the top of the ore body and vein rocks,and the side with small gradient changes indicates its dip direction.
关键词
宝兴沟金矿床/地质特征/地球物理特征/找矿模型Key words
Baoxinggou gold deposit/geological characteristics/geophysical characteristics/pros-pecting model引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据