| 倪 斌.广西贺州市里松-贺县地区矿山开发活动及矿山地质环境遥感监测[J].地质与勘探,2021,57(3):593-602 |
| 广西贺州市里松-贺县地区矿山开发活动及矿山地质环境遥感监测 |
| Remote sensing monitoring of the mining activity and mine geological environment in the Lisong-Hexian area, Hezhou City, Guangxi |
| 投稿时间：2020-05-25 修订日期：2020-12-11 |
| DOI：10.12134/j.dzykt.2021.03.012 |
| 中文关键词: 里松-贺县地区 遥感 监测 矿山开发活动 矿山地质环境 广西 |
| 英文关键词: Lisong-Hexian area, remote sensing, monitoring, mine development activities, mine geological environment, Guangxi |
| 基金项目:国家重点研发计划（编号：2016YFC0600210），国家自然科学基金（编号：41272366；41401515），中国地质调查局项目“广西贺州-梧州地区综合地质调查”（编号：HBT-17190085-190715）和中国冶金地质总局科技创新项目（编号：CMGB202001）联合资助 |
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| 中文摘要: |
| 以2008年和2017年获取的广西贺州市里松-贺县地区的SPOT-5数据和国产GF-2卫星影像数据作为主要数据源，通过对影像数据进行处理，根据影像特征建立了研究区的矿山遥感解译标志，辅以野外验证，利用ArcGIS平台动态监测与分析了研究区矿山开发占地情况和矿山地质环境等问题，厘清了里松-贺县地区的矿山地质环境现状和变化趋势。研究表明：①研究区内2017年矿山开发占地总计1775.03 hm2，占整个研究区面积的1.26%。其中，矿山开采面占地达992.38 hm2，为矿山开发占地的55.91%。对比2008年和2017年的2期数据解译成果，得出2017年的矿山开发占损土地面积比2008年增长51.10%。②研究区的矿山开采引发了滑坡、崩塌、泥石流、不稳定斜坡等地质灾害共计121处，面积达133.48 hm2、开采面占用的土地植被破坏严重、矿山开采也引发了水土和粉尘污染等矿山地质环境问题。 |
| 英文摘要: |
| Uranium-bearing biotite-granite-pegmatite dikes spread along the NW-trending outer contact zone between garnet monzogranite and gneissic granites in the Danfeng area, North Qingling. This work focused on the uranium-bearing biotite pegmatite in this area. On the basis of research of its geological and geochemical characteristics, the genetic relationships between this pegmatite and garnet monzogranite and gneissic granite were examined. Results show that the uranium bearing pegmatite and garnet monzogranite have the same assemblages of accessory minerals and geochemical characteristics(high K and low Na), and distinct difference with gneissic granite(high Na and low K). It has relative enrichment of Rb,Th,Sm, deficit of Ti,P,K, and Ba, and an Eu negative anomaly（δEu=0.03~0.12. In trace elements and REE distribution patterns, it is consistent with the garnet monzogranite. With the increase of incompatibility (Sm→La→Th→Rb), the elements gradually enrich to the pegmatite. The ratios of Rb/Ti and Zr/Hf of uranium bearing pegmatite dikes（Rb/Ti=0.09~0.62, Zr/Hf=21.82~28.89）are largely consistent with those of the garnet monzogranite（Rb/Ti=0.27~0.62, Zr/Hf=18.56~28.54）, while obviously different from the gneissic granite（Rb/Ti=0.01~0.03 , Zr/Hf=27.06~42.58）. Therefore, it is considered that the uranium bearing pegmatite dike resulted from the residual magma of garnet monzogranite. The internal and external contact zones of the rock mass are the favorable areas for pegmatite-type uranium deposit prospecting. |
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