| 张小兵.牟定-元谋地区航磁异常查证及找矿意义[J].地质与勘探,2015,51(6):1159-1167 |
| 牟定-元谋地区航磁异常查证及找矿意义 |
| Inspection of aeromagnetic anomalies in the Mouding–Yuanmou area, Yunnan Province and its prospecting significance |
| 投稿时间：2015-05-04 修订日期：2015-07-30 |
| DOI： |
| 中文关键词: 航磁异常 地面磁测 含铁绿泥石英片岩 基性—超基性侵入岩体 牟定-元谋地区 |
| 英文关键词: Aeromagnetic anomaly, ground magnetic survey, iron–containing chlorite–quartz schist, mafic–ultramafic intrusive rock |
| 基金项目:云南省三年地质找矿行动计划项目：云南省牟定县安益地区地面高精度磁测（编号 [2010]2号）资助 |
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| 中文摘要: |
| 通过对云南省牟定-元谋地区航磁异常开展的1:2.5万地面磁测查证工作，基本查清了异常源，划分确定了两大类找铁磁异常：一类为与龙川群路古模组、海资哨组含铁石英绢云千枚岩、绿泥石英片岩有关的磁异常，其代表为大湾山磁异常，是寻找层控型低品位磁铁矿的重要地段；另一类为与基性—超基性侵入岩体有关的磁异常，其代表为安益磁异常，产有大型贫铂钯磁铁矿体。全区定性推断圈定出与铁有关的铁矿（化）带2个、含铁绿片岩带2个、贫铂钯磁铁基性—超基性岩体2个，分析了其找矿意义，为该区寻找低品位铁矿提供了方向。 |
| 英文摘要: |
| An inspection to a ground magnetic survey of a scale 1﹕25000 in the Mouding–Yuanmou area of Yunnan Province permits to identify largely the sources of anomalies and to determine two categories of anomalies for iron-search. One type of magnetic anomalies are associated with iron–containing quartz–sericite phyllite and chlorite–quartz schist, which belongs to the Lugumo–Haizishao Formation of Longchuan Group, represented by Dawanshan magnetic anomalies, which is the important area for prospecting the stratabound type of low–grade magnetite. The other type of magnetic anomalies are related to mafic–ultramafic intrusive rocks, which produce large platinum and palladium depleted magnetite ore bodies, with Anyi magnetic anomalies as the representative. We qualitatively infer that there are two iron ore belts, two iron–containing green schist belts, and two magnetic mafic–ultramafic rocks with poverty of latinum and palladium in the work area. We also make an analysis of their significance in prospecting and suggest the direction for searching for low–grade iron ore in this region. |
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