岩矿石NIR光谱特征与地球化学异常成分之间的关系:以内蒙古朱拉扎嘎金矿为例
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摘要
以找矿为目的,开展矿区岩矿石反射光谱与地球化学异常成分之间的关系研究。以内蒙古朱拉扎嘎金矿为实验区,沿原P26号剖面线采集岩矿石样品,利用ASD野外光谱测试仪对样品进行光谱测试。在研究蚀变矿物光谱曲线特征和实测样品光谱数据的基础上确定提取与Al—OH、Mg—OH相关的光谱特征吸收深度参数H_(2205)和H_(2315),并研究其与地球化学异常成分之间的关系。通过分析发现,H_(2205)和H_(2315)与地球化学异常Au、Cu、Bi、Fe_2O_3、W、Mo、As有关,其中H_(2205)、H_(2315)与Bi、Fe_2O_3、W、Mo、As可以建立定量反演模型;H_(2205),H_(2315)与Au、Cu等主成矿元素定量关系不明确。研究表明,光谱吸收深度参数H_(2205)和H_(2315)反映成矿环境(高温热液环境和氧化环境)的能力较强,直接反映矿化成分(Au、Cu)的能力不明显。
On the purpose of prospecting,we carried out the research of the relationship between mine rock spectral reflectance and geochemical anomaly components.Taking Zhulazhagagold deposit as the experimentation area,along the original P26 profile,collected the rock and ore samples,the samples were tested by ASD FieldSpec FR.Based on the study of measured sample spectrum data and alteration minerals spectral curve from USGS and JPL,the spectral characteristics absorption depth parameter,H_(2205),H2315 were extracted,which are dependent on the spectral characteristics of Mg-OH and Al-OH,and the relationship between the spectral characteristics and composition of geochemical anomaly was studied.The results show that the H_(2205) and H_(2315) closely related to geochemical anomaly Au,Cu,Bi,Fe_2O_3,W,Mo,and As;among them,aquantitative inversion model can be established between H_(2205),H2315 and Bi,Fe_2O_3,W,Mo,As,whereas the quantitative relationship between H_(2205),H_(2315) and main ore-forming elements Au,Cu is not clear.The study showed that H_(2205) and H_(2315) can reflect mineralization environment strongly,such as high temperature hypothermal,or oxide environment,but are not good for reflecting mineral element composition.
On the purpose of prospecting,we carried out the research of the relationship between mine rock spectral reflectance and geochemical anomaly components.Taking Zhulazhagagold deposit as the experimentation area,along the original P26 profile,collected the rock and ore samples,the samples were tested by ASD FieldSpec FR.Based on the study of measured sample spectrum data and alteration minerals spectral curve from USGS and JPL,the spectral characteristics absorption depth parameter,H_(2205),H2315 were extracted,which are dependent on the spectral characteristics of Mg-OH and Al-OH,and the relationship between the spectral characteristics and composition of geochemical anomaly was studied.The results show that the H_(2205) and H_(2315) closely related to geochemical anomaly Au,Cu,Bi,Fe_2O_3,W,Mo,and As;among them,aquantitative inversion model can be established between H_(2205),H2315 and Bi,Fe_2O_3,W,Mo,As,whereas the quantitative relationship between H_(2205),H_(2315) and main ore-forming elements Au,Cu is not clear.The study showed that H_(2205) and H_(2315) can reflect mineralization environment strongly,such as high temperature hypothermal,or oxide environment,but are not good for reflecting mineral element composition.
引文
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[15]刘苗,蔺启忠,王钦军,等.基于反射光谱的铜元素地球化学异常研究[J].光谱学与光谱分析,2010,30(5):1320-1323.
[16]丛丽娟,岑况,余学中,等.朱拉扎嘎金矿区地物光谱特征与地球化学成分之间的关系[J].中南大学学报(自然科学版),2013,44(1):266-275.
[17]李俊健,翟玉生,杨永强,等.再论内蒙古阿拉善朱拉扎嘎金矿时代:来自锆石SHRIMP U-Pb年龄的新证据[J].地学前缘,2010,17(2):178-184.
[18]马润,郭万良.内蒙古自治区阿拉善左旗朱拉扎嘎及外围金矿评价报告[R].呼和浩特:内蒙古自治区地质调查院,2001,12:6-30.
[19]丁天才.内蒙古朱拉扎嘎金矿地质特征、矿化规律及成因[D].北京:中国地质大学(北京),2003:29-44.
[20]杨万金.阿拉坦敖包、庆格勒图、库乃头喇嘛庙、阿贵庙公社、雅布赖、萨尔台公社等幅1∶20万区域地球化学扫面说明书[R].呼和浩特:内蒙古国土资源勘查开发院,1998:35-43.
[21]陈述彭,童庆禧,郭华东.遥感信息机理研究[M].北京:科学出版社,1998:166-167.
[2]王润生,闫柏琨,刘圣伟,等.岩矿遥感信息定量化技术研究[R].北京:中国国土资源航空物探遥感中心,2007.
[3]CLARK R N,KING T V V,KLEJWA M,et al.High spectral resolution reflectral spectroscopy of minerals[J].Geophysical Research,1990,95(B8):12653-12680.
[4]DUCK E F.Near infrare spectra of muscovite,Tschermak substitution,and metamorphic reaction progress:implications for remote sensing[J].Geology,1994,22:621-624.
[5]甘甫平,王润生,马蔼乃.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.
[6]张宗贵,王润生,郭小方,等.基于地物光谱特征的成像光谱遥感矿物识别方法[J].地学前缘,2003,10(2):437-443.
[7]CLARK R N.Spectroscopy of rocks and minerals,and principles of spectroscopy,in manual of remote sensing,volume3,remote sensing for the Earth Sciences[M].New York:John Wiley and Sons,1999:3-58.
[8]王润生,甘甫平,闫柏琨,等.高光谱矿物填图技术与应用研究[J].国土资源遥感,2010,83(1):1-13.
[9]SWAYZE G A.The hydrothermal and structural history of the cuprite mining district,southwest Nevada:an integrated geological and geophysical approach[D].Boulder:University of Colorado Boulder,1997:4-30.
[10]王润生,杨苏明,闫柏琨.成像光谱矿物识别方法与识别模型评述[J].国土资源遥感,2007(1):1-9.
[11]梁树能,甘甫平,闫柏琨,等.绿泥石矿物成分与光谱特征关系研究[J].光谱学与光谱分析,2014,34(7):1763-1768.
[12]KRUSE F A,HAUFF P L.Identification of illite polytype zoning in disseminated gold deposits using reflectance spectoscopy and X-ray diffraction-potential for mapping with imaging spectrometer[J].IEEE Transactions on Geoscience&Remote Sensing,1991,29(1):101-104.
[13]BOWEN B B,MARTINI B A,CHAN M A,et al.Reflectance spectroscopic mapping of diagenetic hetrogeneities and fluid-flow pathways in the Jurassic Navajo Sandstone[J].AAPG Bulletin,2007,91(2):173-190.
[14]甘甫平,王润生.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.
[15]刘苗,蔺启忠,王钦军,等.基于反射光谱的铜元素地球化学异常研究[J].光谱学与光谱分析,2010,30(5):1320-1323.
[16]丛丽娟,岑况,余学中,等.朱拉扎嘎金矿区地物光谱特征与地球化学成分之间的关系[J].中南大学学报(自然科学版),2013,44(1):266-275.
[17]李俊健,翟玉生,杨永强,等.再论内蒙古阿拉善朱拉扎嘎金矿时代:来自锆石SHRIMP U-Pb年龄的新证据[J].地学前缘,2010,17(2):178-184.
[18]马润,郭万良.内蒙古自治区阿拉善左旗朱拉扎嘎及外围金矿评价报告[R].呼和浩特:内蒙古自治区地质调查院,2001,12:6-30.
[19]丁天才.内蒙古朱拉扎嘎金矿地质特征、矿化规律及成因[D].北京:中国地质大学(北京),2003:29-44.
[20]杨万金.阿拉坦敖包、庆格勒图、库乃头喇嘛庙、阿贵庙公社、雅布赖、萨尔台公社等幅1∶20万区域地球化学扫面说明书[R].呼和浩特:内蒙古国土资源勘查开发院,1998:35-43.
[21]陈述彭,童庆禧,郭华东.遥感信息机理研究[M].北京:科学出版社,1998:166-167.