砂岩型铀矿蚀变矿物研究中的岩心光谱扫描技术
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摘要
以松辽盆地典型砂岩型铀矿钻孔岩心归档资料为基础,系统总结了岩心光谱扫描技术在砂岩型铀矿中的应用流程,并在前人光谱强度与矿物含量研究的基础上,补充开展了不同时间域的矿物扫描结果对比。研究结果表明,岩心光谱扫描技术能快速、有效地提取岩心中的蚀变矿物空间分布信息,开展蚀变矿物填图,包括常见的粘土矿物、硫酸盐矿物、碳酸盐矿物和Fe~(3+)氧化物等;沉积岩长期放置带来的风化作用对光谱数据的影响主要反映在蚀变矿物的整体含量变化上,对蚀变矿物种类未产生明显变化;利用岩心光谱扫描技术完成的蚀变矿物填图,获取的宏观蚀变矿物及其组合变化对砂岩型铀矿地层划分、氧化还原分带、成矿流体特征反演和矿床勘查等具有重要意义,应用前景广阔。
Taking the drilling core of typical sandstone-type uranium deposit in Songliao Basin as the object, we summarize the application process of core spectral scanning technology in sandstone-type uranium deposits. And on the basis of previous research and the spectral intensity of mineral content, the contrast of mineral scan results are made in different time domain.The results show that the core spectral scanning technique can rapidly and effectively extract the spatial distribution information of altered minerals in the core of the rock, including common clay minerals, sulfate minerals and carbonate minerals and Fe~(3+) oxide. The influence from long-term core weathering on the spectral data is mainly only less than 5% change of the total content of altered minerals,and has no obvious change in the types of altered minerals. The alteration minerals and their combination changes obtained by core spectrum scanning technique are of great significance for stratigraphic division, redox zoning and characteristics inversion of ore-forming fluids, and have wide application prospects.
Taking the drilling core of typical sandstone-type uranium deposit in Songliao Basin as the object, we summarize the application process of core spectral scanning technology in sandstone-type uranium deposits. And on the basis of previous research and the spectral intensity of mineral content, the contrast of mineral scan results are made in different time domain.The results show that the core spectral scanning technique can rapidly and effectively extract the spatial distribution information of altered minerals in the core of the rock, including common clay minerals, sulfate minerals and carbonate minerals and Fe~(3+) oxide. The influence from long-term core weathering on the spectral data is mainly only less than 5% change of the total content of altered minerals,and has no obvious change in the types of altered minerals. The alteration minerals and their combination changes obtained by core spectrum scanning technique are of great significance for stratigraphic division, redox zoning and characteristics inversion of ore-forming fluids, and have wide application prospects.
引文
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[2]蔡根庆,黄志章,李胜祥.十红滩地浸砂岩铀矿层间氧化带蚀变矿物群[J].地质学报,2006,80(1):119-125.
[3]戴明建,李文辉,刘璐,等.鄂尔多斯盆地纳岭沟铀矿床后生蚀变成因及其与铀成矿的关系[J].地质通报,2017,36(4):520-526.
[4]李胜祥,陈戴生,王瑞瑛,等.伊犁盆地含煤系地层沉积相特征及其与层间氧化带砂岩型铀矿成矿关系[J].铀矿地质,1996(yk):129-134.
[5]荣辉,焦养泉,吴立群,等.松辽盆地南部钱家店铀矿床后生蚀变作用及其对铀成矿的约束[J].地球科学,2016,41(1):153-166.
[6]吴柏林,刘池阳,张复新,等.东胜砂岩型铀矿后生蚀变地球化学性质及其成矿意义[J].地质学报,2006,80(5):740-747.
[7]肖新建.东胜地区砂岩铀矿体流体成矿作用地球化学研究[D].核工业北京地质研究院博士学位论文,2004.
[8]肖滋泽.内蒙古巴音塔拉盆地砂岩型铀矿后生蚀变性质及其成矿意义[J].世界核地质科学,2013,30(4):205-209.
[9]张振强,李国宽,桑吉盛,等.松辽盆地南部第三系可地浸砂岩型铀矿成矿条件研究[J].铀矿地质,2001,17(3):145-149.
[10]朱强,焦养泉,吴立群,等.松辽盆地钱家店地区姚家组铀储层岩石学特征及成岩作用[J].中国科技论文,2015(15):1802-1808.
[11]徐清俊,叶发旺,张川,等.基于高光谱技术的钻孔岩心蚀变信息研究:以新疆白杨河铀矿床为例[J].东华理工大学学报(自然科学版),2016,39(2):184-190.
[12]郭洪义.东昆仑纳赤台地区高光谱遥感岩矿填图研究[D].成都理工大学,2009.
[13]李晶,祁进平,修连存,等.岩芯光谱扫描仪在紫金山矿产勘查中的应用[J].矿物学报,2013(s2):1020-1021.
[14]李子颖,秦明宽,蔡煜琦,等.铀矿地质基础研究和勘查技术研发重大进展与创新[J].铀矿地质,2015,31(增):141-150.
[15]Mathieu M,Roy R,Launeau P,et al.Alteration mapping on drill cores using a Hy Spex SWIR-320m hyperspectral camera:Application to the exploration of an unconformity-related uranium deposit(Saskatchewan,Canada)[J].Journal of Geochemical Exploration.2016,172:71-88.
[16]Clark R N,Roush T L.Reflectance Spectroscopy:Quantitative Analysis Techniques for Remote Sensing Applications[J].Journal of Geophysical Research,1984,89(7):6329-6340.
[17]Clark R N,Swayze G A,Wise R,et al.USGS digital spectral library splib06a[J].Data,2007.
[18]Hunt G R,Salisbury J W.Visible and near-infrared spectra of minerals and rocks:L Silicate minerals[J].Modern Geology,1970:283-300.
[19]Hunt G R,Salisbury J W,Lenhoff G J.Visible and near-infrared spectra of minerals and rocks:VL Additional silicate minerals[J].Modern Geology,1974:331-363.
[20]Hunt G R.Spectral Signature of Particular Minerals,in the Visible and Infrared[J].Geophysics,1977,42:501-513.
[21]甘甫平.遥感岩矿信息提取基础与技术方法研究[M].北京:地质出版社,2004,56-57.
[22]修连存,郑志忠,俞正奎,等.近红外光谱分析技术在蚀变矿物鉴定中的应用[J].地质学报,2007,81(11):1584-1590.
[23]章革.高光谱短波红外技术在矿区矿物填图中的应用研究[D].中国地质大学(北京),2005.
[24]Yang K,Cardy M,Mason P,et al.Hy Logging for characterisation of clay minerals and carbonic in drill-hole samples of the Yeelirrie Uranium deposit[R].W.A.CSIRO Report EP101859,2010:16.
[25]Yang K,Huntington J F,Quigley M,et al.Zonation of Clays in the Bowdens Ag-Pb-Zn Deposit,New South Wales:Implications for Mineral Exploration[J].Proceedings of SEG2012,Lima,Peru,2012,26-28.
[26]Yang K,Huntington J F.Spectral analysis of synthetic mineral mixtures[R].CSIRO EM Report 411R,1997,28.
[27]Yang K,Huntington J F,Boardman J W,et al.Mapping hydrothermal alteration in the Comstock mining district,Nevada,using simulated satellite-borne hyperspectral data[J].Australian Journal of Earth Sciences,1999,46:915-922.
[28]Yang K,Lian C,Huntington J F,et al.Infrared spectral reflectance characterization of the hydrothermal alteration at the Tuwu Cu-Au deposit,Xinjiang,China[J].Mineralium Deposita,2005,40(3):324-336.
[29]燕守勋,张兵,赵永超,等.矿物与岩石的可见-近红外光谱特性综述[J].遥感技术与应用,2003,04:191-201.
[30]相爱芹.短波红外技术在矿物填图与遥感岩性识别中的应用研究[D].中南大学,2007.
[31]甘甫平,王润生,马蔼乃,等.基于特征谱带的高光谱遥感矿物谱系识别[J].地学前缘,2003,10(2):445-454.
[32]Laukamp C,Cacetta M,Chia J,et al.The uses abuses and opportunities for hyperspectral technologies and derived geoscience information[J].Aig Bull,2010.
[33]田庆久.机载成像光谱遥感器场地外定标规范的初步研究[J].遥感技术与应用,1999,14(1):15-19.
[34]伏万军.粘土矿物成因及对砂岩储集性能的影响.古地理学报,2000,2(3).