| 于海军,张作伦,任宏,刘扬.高精度磁法在黑龙江712斑岩型钼矿床勘查评价中的应用[J].矿产勘查,2018,9(2):306-310 |
| 高精度磁法在黑龙江712斑岩型钼矿床勘查评价中的应用 |
| Application of high precision magnetic surveying in exploration and assessment on 712 porphyritic molybdenum deposit in Heilongjiang |
| 投稿时间：2017-05-10 |
| DOI： |
| 中文关键词: 斑岩型钼矿床 高精度磁法 黑龙江 |
| 英文关键词: porphyry molybdenum deposit,high precision magnetic surveying,Heilongjiang |
| 基金项目: |
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| 摘要点击次数: 1853 |
| 全文下载次数: 1022 |
| 中文摘要: |
| 随着找矿难度的增加,地球物理方法是实现覆盖区找矿的重要手段。黑龙江省712斑岩型钼矿床地表植被发育,无基岩露头,找矿难度较大。斑岩型矿床具高成矿温度、大规模蚀变特点,蚀变区受热液活动影响可产生明显退磁。为快速圈定712钼矿床矿化蚀变中心,野外采用高精度磁法开展扫面测量。测量结果表明研究区相对正、负磁异常分布结构清晰,中心地区以负磁为主,四周以正磁为主,负磁异常总体呈NE向展布。根据磁异常布设的19个钻孔查证结果表明,赋矿二长花岗岩普遍具硅化、绢云母化、绿泥石化,各孔多见累计厚度大于100 m钼矿体。 |
| 英文摘要: |
| With the difficulty of mineral exploration is increasing, the important function of geophysical exploration is gradually revealed, especially in the covered area. The surface of 712 porphyritic molybdenum deposit in Heilongjiang Province is covered with heavily vegetation.Besides,no bedrock outcrops make it more difficult to conduct amineral exploration activities over there. The porphyry deposits are characterized by high metallogenic temperature and large-scale alteration. The alteration zone is obviously demagnetized because of the hydrothermal activities. To delimit the mineralization and alteration targets with high efficiency, the high precision magnetic surveying is carried out over 712 molybdenum property. The magnetic data show that the distribution structure of the positive and negative magnetic anomalies is clear, and the central area is covered broadly by negative magnetic anomalies, the most of surrounding areas are positive magnetic anomalies, and the strike of negative magnetic anomalies is NW-trending. The results of 19 boreholes arranged according tomagnetic anomalies show that the ore-bearing monzonitic granite is generally metamorphosed by silicification, sericitization and chloritization.More than 100 meters cumulated thickness of molybdenum ore body has been intersected in the boreholes. |
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