EXTRACTION OF LINEAR STRUCTURE AND ALTERATION INFORMATION USING ASTER DATA AND PROSPECTING PROGNOSIS FOR TUDUN, HAMI
-
摘要: 土墩铜镍矿位于东天山黄山—镜儿泉铜镍成矿带, 矿床形成主要受岩浆作用和构造作用控制。为了进一步探测该地区的矿产情况, 采用ASTER热红外波段比值组合模拟的反演算法, 对发射率数据进行SiO2含量的定量反演, 在反演图上识别出了研究区内明显的石英断裂带。结合ASTER数据可见光—近红外光谱波段中提取出的构造信息, 得出研究区完整的构造解译图。采用主成分分析和阈值分割法对研究区进行了铁染、羟基蚀变信息提取。最后根据区内线性构造、遥感蚀变信息、岩石分布特征、化探异常、已知矿床点分布资料综合分析, 圈定出6个成矿有利区, 为研究区今后的找矿勘查提供依据。
-
关键词:
- SiO2含量的定量反演 /
- 构造提取 /
- 蚀变信息提取 /
- 找矿靶区
Abstract: Copper-nickel deposit of Tudun which is located on the Huangshan-Jingerquan copper-nickel mineralization belt in East Tianshan area is controlled by magmatism and tectonic action. To further prospect the minerals of this region, using thermal infrared data of Aster, the authors quantitatively retrieve SiO2 content in the rocks from emissivity data by inversion algorithm simulated from different band ratio combination. According to the inversion map view, we extract many large silicified fault zones. Combining with the information of the faults, based on visible -near infrared bands, we obtain the fracture distribution of the study area. Principal component analysis and threshold segmentation were used to enhance the spectrum and space information and extract the iron-stained and hydroxyl alteration information. Through comprehensively analyzing the linear structure, remote sensing alteration information, rock mass distribution characteristics, regional geochemical information and known deposits, six metallogenic prospective areas are delineated. -
图 1 研究区所在的大地构造环境(据邵行来等，2010，略修改)
Q—第四纪松散沉积层；E-N—新近系—古近系沉积层；J—侏罗系；P1—下二叠统；C2—上石炭统中深变质岩层；C1—下石炭统变质岩层；D1—下泥盆统火山岩-火山碎屑岩；Jx—蓟县系变质岩；Ch—长城系变质岩；δ-ν—镁铁-超镁铁岩；Cγ—花岗岩；Pξγ—钾长花岗岩；Cδ—闪长岩；Cν—辉长岩；1—深大断裂；2—韧性剪切带；3—泉；4—铜镍矿
Figure 1. Geographical map of Tudun, Hami, Xinjiang Province
图 3 研究区SiO2含量及硅化断裂带分布
Figure 3. Content figure of SiO2 and silicified fracture distribution in study area
图 7 哈密土墩找矿预测图
1—黑云母花岗岩；2—闪长岩；3—花岗闪长岩；4—镁铁-超镁铁岩；5—铁染蚀变异常区；6—铝羟基蚀变异常区；7—镁羟基蚀变异常区；8—断裂；9—硅质破碎带；10—铜镍矿床；11—铜元素化探异常区；12—金元素化探异常区；13—镍元素化探异常区；14—锑元素化探异常区；15—成矿远景区
Figure 7. Prediction map of mineral prospect in Tudun, Hami
表 1 Aster 1, 3, 4, 8波段的PCA统计
Table 1. PCA statistics of Aster 1, 3, 4, 8
主成分 Aster1 Aster3 Aster4 Aster8 PC1 0.370119 0.552816 0.609681 0.430923 PC2 0.699269 0.360828 -0.537939 -0.302404 PC3 -0.192114 0.161044 -0.578185 0.776440 PC4 0.580626 -0.733664 0.067913 0.346408 
下载: 导出CSV
表 2 Aster 1, 4, 6, 7波段的PCA统计
Table 2. PCA statistics of Aster 1, 4, 6, 7
主成分 Aster1 Aster4 Aster6 Aster7 PC1 -0.374032 -0.647138 -0.457182 -0.481972 PC2 -0.926610 0.241041 0.220156 0.186614 PC3 -0.023652 -0.721276 -0.428192 0.543924 PC4 0.021855 -0.442569 0.860706 -0.250680
下载: 导出CSV
表 3 Aster 1, 2, 3, 4波段的PCA统计
Table 3. PCA statistics of Aster 1, 2, 3, 4
主成分 Aster1 Aster4 Aster6 Aster7 PC1 0.362885 0.505763 0.533117 0.572979 PC2 0.469616 0.377160 0.162507 -0.781539 PC3 0.735924 -0.153289 -0.614046 0.240551 PC4 -0.325870 0.760563 -0.558860 0.055022
下载: 导出CSV
-
[1] 彭方红, 莫新华, 贺静, 等.赤湖—土墩地区地球化学找矿效果[J].新疆地质, 2001, 19(4):276~280. http://www.cnki.com.cn/Article/CJFDTOTAL-XJDI200104011.htmPENG Fang-hong, MO Xin-hua, HE Jing, et al. Role of geochemistry in ore prospecting at Chihu-Tudun region of eastern Tianshan[J]. Xinjiang Geology, 2001, 19(4): 276~280. http://www.cnki.com.cn/Article/CJFDTOTAL-XJDI200104011.htm [2] 永文富.新疆哈密土墩基性—超基性岩岩体特征及其含矿性研究[J].新疆有色金属, 2002, (3):1~6. http://www.cnki.com.cn/Article/CJFDTOTAL-XJYS200203000.htmWEN Yong-fu. The research of mafic-ultramafic rocks' characteristics and mineralized in Tudun, Hami, Xingjiang Province [J]. Xinjiang Nonferrous Metals, 2002, (3): 1~6. http://www.cnki.com.cn/Article/CJFDTOTAL-XJYS200203000.htm [3] 王敏芳, 夏庆霖, 肖凡, 等.新疆东天山土墩铜镍硫化物矿床岩石地球化学和铂族元素特征及其对成矿的指示意义[J].矿床地质, 2012, 31(6):1195~1210. http://www.cnki.com.cn/Article/CJFDTOTAL-KCDZ201206007.htmWANG Min-fang, XIA Qing-lin, XIAO fan, et al. Rock geochemistry and platinum group elements characteristics of Tudun Cu-Ni sulfide deposit in East Tianshan Mountains of Xinjiang and theirmetallogenic implications [J]. Mineral Deposits, 2012, 31(6): 1195~1210. http://www.cnki.com.cn/Article/CJFDTOTAL-KCDZ201206007.htm [4] 周强, 甘甫平, 陈建平, 等.哈密土墩矿区高光谱影像蚀变矿物识别初步研究[J].矿床地质, 2006, 25(3):329~336. http://www.cnki.com.cn/Article/CJFDTOTAL-KCDZ200603011.htmZHOU Qiang, GAN Fu-ping, CHEN Jian-ping, et al. Application of hyper-spectral imaging data to mineral identification in Tudun Cu-Ni deposit, Hami, Xinjiang[J]. Mineral Deposits, 2006, 25(3): 329~336. http://www.cnki.com.cn/Article/CJFDTOTAL-KCDZ200603011.htm [5] 王俊虎, 张杰林, 张静波.基于ASTER热红外数据的SiO2含量反演在某矿田信息提取中的应用[J].铀矿地质, 2010, 26(5):306~310.WANG Jun-hu, ZHANG Jie-lin, ZHANG Jing-bo. SiO2 content retrieving based on ASTER thermal data and its application in substracting metallogenic factor of a uranium deposit[J].Uranium Geology, 2010, 26(5): 306~310. [6] 闫柏琨, 刘圣伟, 王润生, 等.热红外遥感定量反演地表岩石的SiO2含量[J].地质通报, 2006, 25(5):639~643. http://www.cnki.com.cn/Article/CJFDTOTAL-ZQYD200605019.htmYAN Bai-kun, LIU Sheng-wei, WANG Run-sheng, et al. Quantitative inversion of the SiO2 content in surface rocks using thermal infrared remote sensing[J]. Geological Bulletin of China, 2006, 25(5): 639~643. http://www.cnki.com.cn/Article/CJFDTOTAL-ZQYD200605019.htm [7] Ninomiya Y. Quantitative estimation of SiO2 content in igneous rocks using thermal infrared spectral with a neural net work approach [J]. IEEE Transactions on Geoscience and Remote Sensing, 1995, 3(3): 684~691. [8] Yoshiki Ninomiya, Fu Bihong. Detecting lithology with ASTER multispectral thermal infrared "radiance-at-sensor" data [J]. Remote Sensing of Environment, 2005, 99(1): 127~130. [9] 陈江, 王安建.利用ASTER热红外遥感数据开展岩石化学成分填图的初步研究[J].遥感学报, 2007, 11(4):601~608. doi: 10.11834/jrs.20070483CHEN Jing, WANG An-jian. The pilot study on petrochemistry components mapping with ASTER thermal infrared remote sensing data[J]. Journal of Remote Sensing, 2007, 11(4): 601~608. doi: 10.11834/jrs.20070483 [10] 钱建平, 张渊, 赵小星, 等.内蒙古东乌旗遥感构造和蚀变信息提取与找矿预测[J].国土资源遥感, 2013, 25(3):109~116. doi: 10.6046/gtzyyg.2013.03.19QIAN Jian-ping, ZHANG Yuan, ZHAO Xiao-xing, et al. Extraction of linear structure and alteration information based on remote sensing image and ore-prospecting prognosis for Dongwu Banner, Inner Mongolia[J]. Remote Sensing for Land & Resources, 2013, 25(3): 109~116. doi: 10.6046/gtzyyg.2013.03.19 [11] 陈晔, 何政伟, 邓辉, 等.利用ASTER影像识别和提取矿化蚀变信息[J].桂林理工大学学报, 2014, 34(1):51~57. http://www.cnki.com.cn/Article/CJFDTOTAL-GLGX201401008.htmCHEN Ye, HE Zheng-wei, DENG Hui, et al. Identification and extraction of mineralized alteration information by ASTER remote sensing data[J]. Journal of Guilin University of Technology, 2014, 34(1): 51~57. http://www.cnki.com.cn/Article/CJFDTOTAL-GLGX201401008.htm [12] 张玉君, 杨建民, 陈薇.ETM+(TM)蚀变遥感异常提取方法研究与应用——地质依据和波谱前提[J].国土资源遥感, 2002, (4):30~35. doi: 10.6046/gtzyyg.2002.04.07ZHANG Yu-jun, YANG Jian-min, CHEN Wei. A study of the method for extraction of alteration anomalies from the ETM+ (TM) data and its application: Geologic basis and spectral precondition[J]. Remote Sensing for Land & Resources, 2002, (4): 30~35. doi: 10.6046/gtzyyg.2002.04.07 -
下载:
计量
- 文章访问数: 243
- HTML全文浏览量: 95
- PDF下载量: 12
- 被引次数: 0
