| 综合找矿方法在东阿单庄BIF型铁矿床勘查中的应用 |
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| 引用本文： | 张岩,张尚坤,于学峰,单伟,陈文韬,闫诚,郭朋,李小伟.综合找矿方法在东阿单庄BIF型铁矿床勘查中的应用[J].地球科学,2016,41(4):655-663. |
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| 作者姓名： | 张岩 张尚坤 于学峰 单伟 陈文韬 闫诚 郭朋 李小伟 |
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| 作者单位： | 1.国土资源部金矿成矿过程与资源利用重点实验室，山东济南 250013 |
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| 基金项目： | 山东省“泰山学者”建设工程项目鲁政办字[2013]122号山东省金属矿产成矿地质过程与资源利用重点实验室项目2014001山东省地质勘查项目鲁勘字[2014]9号 |
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| 摘 要： | 高精度磁测和井中三分量磁测是行之有效的磁法勘探手段，对于隐伏区BIF型铁矿床勘查更具意义.单庄铁矿是山东省在黄河以北覆盖区发现的一处大-中型条带状磁铁石英岩矿床(banded iron formation，简称BIF)，矿体赋存于晚太古代泰山岩群山草峪组，目前已发现矿体20余个，矿体倾向南西，倾角为56°~70°，TFe平均品位为28%，mFe平均品位为22%.以单庄铁矿勘查为例，介绍了在覆盖区BIF型铁矿床勘查中的综合找矿方法.在充分了解区域地质概况和航磁异常等物探成果的基础上，在成矿有利地段实施高精度磁测和磁测剖面测量，选取最优位置进行钻孔验证.本项目的实施结果表明，在钻探过程中或终孔结束前，要重视井中三分量磁测的重要性，因为它对于井下盲矿体的圈定和井中旁侧异常的指示将会起到至关重要的作用.
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| 关 键 词： | 磁法勘探 铁矿 单庄 东阿 山东 矿床地质 |
| 收稿时间： | 2015-09-12 |
Application of Integrated Prospecting Method on Shanzhuang BIF Deposit in Dong'e County |
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| Abstract: | High resolution magnetic survey and borehole triple-component magnetometry are the effective magetic prospecting methods, especially much more significative for the exploration of banded iron formation (BIF) type iron deposits around coverage region. The Shanzhuang iron deposit, located in the covered regions of north of the Yellow River in Shandong Province, is a medium-to large-scale magnetite-quartzite type iron deposit. The deposit includes more than 20 iron bodies, which occur in the Shancaoyu Formation of the Neoproterozoic Taishan Group. The iron bodies dip to the southwest at 56°-70°. Average grade is about 28% for the total iron, and 22% for the magnetic iron. Taking the prospecting of the Shanzhuang iron deposit as an example, it aims to introduce an integrated prospecting method for BIF iron deposits in covered regions. Based on regional geological and geophysical characteristics, such as aeromagnetic anomaly, a high-resolution magnetic survey and profile measurement in favorable prospecting places were carried out, and the best drilling spot is chosen. It is found in the study that the borehole triple-component magnetometry during drilling and right before ending of drilling should be paid special attention, which could not only help find blind ore bodies, but also indicate abnormity around the borehole. |
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