综合物探方法在崤山薄脉型金多金属矿找矿的应用探究

Study on application of comprehensive geophysical prospecting method in thin-vein gold polymetallic ore deposit in Xiaoshan Mountains

熊耳山、崤山和小秦岭属于同一大地构造单元,自古以来都是我国重要的金多金属矿集聚区。虽然大地构造位置相似,但是熊耳山、小秦岭在找矿上已经取得了较大的成果,崤山却相对滞后。究其原因在于,崤山地区覆盖层相对较厚,深部成矿类型主要为薄脉、陡倾型矿床,这类矿床类型运用常规电法、磁法等找矿效果甚微。本文针对这种矿床类型,我们选取了激电测深与可控源大地电磁测深的方法组合,既能发挥可控源探测中深部电阻率差异的优点,又能利用激电测深方法寻找矿化体的特点,准确锁定薄脉型矿床矿化、蚀变位置等信息,为薄脉型矿床快速打开找矿突破提供了一种经济合理的方法手段。通过在寺家沟-宽坪矿区已知矿上的试验工作,总结出适合崤山地区薄脉型矿床的物探方法组合,然后在盲矿区进行验证推广,达到最经济合理的找矿效果。该工作进一步增强了国土资源科技创新能力,可以发挥科技创新工作引领支撑作用,更好地为国土资源管理服务。

Belonging to the same tectonic unit,Xiong’ershan,Xiaoshan and Xiaoqinling were important gold polymetallic deposits in my country since ancient times.However,the forst two have schived significant findings,the latter lags behind.why?normal electrical and magnetic prospecting methods used to prospect have poor effect beacuse of the thick overburden layer and fine vein-sleeply deposits in deepth.Therefore,for this type of deposit,we selected a combination of IP sounding and controlled source magnetotelluric sounding,which can not only take advantage of the difference in resistivity in the depth of the controllable source detection,but also use the IP sounding method Finding the characteristics of mineralized bodies,to accurately lock the information on the mineralization and alteration positions of thin-vein deposits,and provide an economical and reasonable method for the rapid opening of prospecting breakthroughs for thin-vein deposits.Through experimental work on known mines,a combination of geophysical prospecting methods suitable for thin vein deposits in the Yaoshan area is summarized,and then verified and promoted in the blind mining area to achieve the most economical and reasonable prospecting effect,further enhance the scientific and technological innovation capabilities of land and resources,give full play to the leading and supporting role of scientific and technological innovation,and better serve the management of land and resources.