黑龙江省二龙山地区航放航磁特征及其金矿床找矿前景  

Airborne magnetic and spectrometric characteristics and prospecting potential of gold deposit in Erlongshan,Heilongjiang Province

作　　者：汪哲 杨金政[1,2] 张文峰 祁程[1] 田宇 蔡文军[3] WANG Zhe;YANG Jinzheng;ZHANG Wenfeng;QI Cheng;TIAN Yu;CAI Wenjun(Airborne Survey and Remote Sensing Center of Nuclear Industry,Shijiazhuang 050002,Hebei,China;China Nuclear Emergency Aviation Monitoring Engineering Technology Research Center,Shijiazhuang 050002,Hebei,China;Huaye Geoscience(Beijing)Technology Co.,Ltd.,Beijing 100013,China)

机构地区：[1]核工业航测遥感中心,河北石家庄050002 [2]中核核应急航空监测工程技术研究中心,河北石家庄050002 [3]华业地学(北京)科技有限公司,北京100013

出　　处：《矿产勘查》2024年第7期1185-1194,共10页Mineral Exploration

基　　金：黑龙江省地勘基金项目(KCZX-SDKC-2016024)资助。

摘　　要：黑龙江省二龙山地区地处嫩江大断裂北西侧、龙江隆起带西南缘,该区已发现多个金矿点。本文在前人工作的基础上,利用最新的高精度航放航磁测量数据,研究了黑龙江省二龙山地区金矿床航磁航放特征,结合区域地质背景,分析认为二龙山地区岩金矿床多发育于花岗岩韧性剪切带及构造破碎带中,在航放场上多位于钍高值区(含量一般为10~12μg/g),在航磁上呈平缓的负磁异常特征(幅值一般为-150~-50nT),总体上具有明显的“低磁、低钾、高钍”特征,同时钍钾比、钍增量均有较好的反映。研究成果可为本区快速寻找金矿提供找矿线索,具有较好的实用价值,也为该区及周边地区实现快速找矿突破提供了依据。A several gold deposits have been found in Erlongshan,Heilongjiang Province,located at northwest of Nenjiang mega-fault and southwest margin of Longjiang uplift.Based on the previous work,the airborne magnetic and spectrometric characteristics are analyzed on the latest high-precision airborne magnetic and spectrometric data.Combining with regional geological background,the conclusion is achieved that rock gold deposits predominantly develop at granite ductile shearing belt and structural fracture zone with high concentration thorium(10-12 μg/g),gently negative magnetic region(150--50 nT),which,on the whole,have characteristics of "low magnetism,low potassium and high thorium",and good indication in ratio of thorium to potassium and thorium increment.After ground verification,the method is very practical and provides good clues for fast finding of gold deposit.It also provides the basis for making a quick breakthrough in prospecting in the area.

关 键 词：航放异常 航磁异常 金矿床 二龙山地区 

分 类 号：P631[天文地球—地质矿产勘探]