李松涛(1987-),男,四川巴中人,副教授,从事卡林型金矿成矿规律与找矿预测研究工作。lisongtaozgh@163.com |
收稿日期: 2020-10-10
修回日期: 2020-11-14
网络出版日期: 2021-03-22
基金资助
国家自然科学基金项目“我国西南(贵州)喀斯特地区特色矿产成矿理论及综合利用”(U1812402)
国家重点研发计划项目“深地资源勘查开采”(2017YFC0601500)
贵州省科技厅项目“华南陡山沱组盖帽碳酸盐岩中保留的古喀斯特结构研究”(黔科合平台人才[2018]5778-04)
Tectono-geochemistry Weak Mineralization Information Extraction Method and Its Application in the Carlin-type Gold Accumulation Area of South-western Guizhou
Received date: 2020-10-10
Revised date: 2020-11-14
Online published: 2021-03-22
黔西南卡林型金矿聚集区作为滇黔桂“金三角”最重要的组成部分,其深部和外围找矿工作面临窘境。为突破传统化探找矿方法在深部矿产资源探寻中的难点,本研究选择泥堡金矿床外围区域进行1∶5万土壤地球化学和1∶5万构造地球化学弱信息提取对比研究。研究结果表明:构造地球化学方法能更有效地提取深部弱矿化信息,同时具有经济、实用且高效的特点。基于地质和构造地球化学特征,在研究区圈定4个综合异常,对成矿条件较好的Ⅱ号异常进行工程验证,取得了显著找矿成果。综合地质与化探研究成果认为,构造地球化学弱信息提取方法对泥堡金矿外围的找矿工作具有很好的指导作用,为研究区开展深部找矿工作提供了科学依据;经过进一步完善和推广应用,该方法可望在黔西南卡林型金矿找矿方面发挥重要作用。
李松涛 , 刘建中 , 夏勇 , 谢卓君 , 谭亲平 , 王泽鹏 , 周光红 , 杨成富 , 蒙明华 , 谭礼金 , 汪小勇 , 李俊海 , 徐良易 , 王大富 . 黔西南卡林型金矿聚集区构造地球化学弱矿化信息提取方法及其应用研究[J]. 黄金科学技术, 2021 , 29(1) : 53 -63 . DOI: 10.11872/j.issn.1005-2518.2021.01.182
The southwestern Guizhou gold ore concentration area is one of the most important parts of the Yunnan-Guizhou-Guangxi “golden triangle” in southwestern China,its deep and peripheral prospecting work is facing a dilemma.At present,traditional geochemical methods face great challenges in the exploration of deep hydrothermal minerals (such as carlin-type gold deposits in southwest Guizhou).In order to break through the difficulties of traditional geochemical prospecting methods in the exploration of deep mineral resources,the peripheral area of Nibao gold deposit was selected for a comparative study on the extraction of weak information of 1∶50 000 soil geochemistry and 1∶50 000 tectono-geochemistry.Through the comparative study of soil geochemical survey in the same region,it is found that the method of extracting weak information of tectono-geochemistry has the following characteristics:(1) The anomaly has good reproducibility,within the range of anomalies delineated by soil geochemistry,the extraction of weak information of tectono-geochemistry can also delineate anomalies.(2)The details are more obvious,and the anomaly area obtained by the extraction of tectono-geochemical weak information is larger in the area of soil geochemical anomalies,which can obviously magnify the “high,large and complete” anomalies and strengthen some anomalies.(3)The value of high value point increases exponentially,and the highest content of Au obtained from the weak information of tectono-geochemistry is tens of times higher than that of soil geochemistry,which can highlight the high anomaly.(4)The extraction of weak information is more effective and can form anomalies in the areas where the soil geochemical survey does not show anomalies,indicating that this method plays a good role in the extraction of weak mineralization information and the location and prediction of concealed deposits.(5)The number of tectono-geochemical weak information samples is only 60% of that of the same scale soil samples,the sampling intensity is significantly reduced,and the economy is prominent.In conclusion,the results show that the tectono-geochemistry is not only more effective to extract the weak mineralization information,but also has the characteristics of economy,practicality and efficient.According to the characteristics of geology and tectono-geochemistry,four comprehensive anomalies are delineated.Through the engineering verification of No.2 anomaly with better metallogenic conditions,the remarkable prospecting results have been obtained. Com-prehensive results of geology and geochemistry in the study area show that the tectono-geochemistry weak information extraction provides a scientific basis for deep prospecting in the periphery of Nibao gold deposit. After further improvement and application,tectono-geochemical weak information extraction methods is expected to play an important role in prospecting for carlin-type gold deposits in southwestern Guizhou.
内蒙古:草原生态红线内严禁新上矿产项目
内蒙古自治区政府于2021年2月9日发布《关于矿产资源开发中加强草原生态保护的意见》(以下简称《意见》),对草原上新建矿产资源开发项目、已建成矿产资源开发项目及矿山环境治理等作出详细规定,从制度机制上再加码,进一步加强矿产资源开发领域草原保护管理工作,持续筑牢我国北方重要生态安全屏障。
《意见》提出,要严格控制草原上新建矿产资源开发项目。在草原生态红线内严禁乱采滥挖、新上矿产资源开发项目,其他草原除经依法依规批准的保障国家能源战略安全项目外,不得新上矿产资源开发项目。新上矿产资源开发项目在开展前期工作时,应征求林业和草原行政主管部门意见,把先预审、再立项、后建设的源头把控原则落到实处。矿产资源在勘查时确需临时占用草原的,由旗县级以上人民政府林业和草原行政主管部门依据确定的权限分级审批。
《意见》强调,要严格执行矿山生态环境保护与恢复治理标准,因地制宜开展生态修复,提升废弃矿山、采矿沉陷区和煤田(矸石)火区治理效果。自然资源、生态环境、林草等部门要按照职能职责,督促矿产资源开发企业严格落实矿山地质环境保护与土地复垦方案,切实做好被占用草原的矿山环境综合治理工作。对无责任主体的矿山,旗县(市、区)人民政府要履行修复治理主体责任,在全面调查核实的基础上,分类、分区、分阶段组织实施。鼓励企业修复无主矿山,并依法依规、科学合理利用修复后的土地。自然资源、生态环境部门会同有关部门、科研单位,制定绿色矿山建设标准,健全绿色矿山标准体系,提升矿山生态环境治理水平。
要按照部门职能职责,进一步做好草原矿产资源开发利用事中事后监管,切实形成监管合力。充分利用“天空看、地面查”等现代科技手段,开展全覆盖式监督检查,实现全方位监测监管,督促企业依法依规开发矿产资源。严厉打击矿产资源开发违法占用草原行为。
(来源:中国矿业报)
http://www.goldsci.ac.cn/article/2021/1005-2518/1005-2518-2021-29-1-53.shtml
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