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基于ASTER的哈密土墩地区构造及蚀变信息提取与找矿预测

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陈菁, 周萍. 基于ASTER的哈密土墩地区构造及蚀变信息提取与找矿预测[J]. 地质力学学报, 2015, 21(2): 209-217.
引用本文: 陈菁, 周萍. 基于ASTER的哈密土墩地区构造及蚀变信息提取与找矿预测[J]. 地质力学学报, 2015, 21(2): 209-217.
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CHEN Jing, ZHOU Ping. EXTRACTION OF LINEAR STRUCTURE AND ALTERATION INFORMATION USING ASTER DATA AND PROSPECTING PROGNOSIS FOR TUDUN, HAMI[J]. Journal of Geomechanics, 2015, 21(2): 209-217.
Citation: CHEN Jing, ZHOU Ping. EXTRACTION OF LINEAR STRUCTURE AND ALTERATION INFORMATION USING ASTER DATA AND PROSPECTING PROGNOSIS FOR TUDUN, HAMI[J]. Journal of Geomechanics, 2015, 21(2): 209-217.
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基于ASTER的哈密土墩地区构造及蚀变信息提取与找矿预测

  • 中国地质大学地球科学与资源学院, 北京 100083

  • 基金项目:
    中国地质调查局地质调查项目"地质勘查遥感系统集成与综合应用示范"(1212011120226)
详细信息
    作者简介: 陈菁(1990-), 女, 天津市人, 硕士研究生, 主要从事遥感地质研究。E-mail:840800032@qq.com
    通讯作者: 周萍(1964-), 女, 北京市人, 副教授, 主要从事高光谱遥感教学及科研工作。E-mail:zhoupx@cugb.edu.cn

  • 中图分类号: P627

EXTRACTION OF LINEAR STRUCTURE AND ALTERATION INFORMATION USING ASTER DATA AND PROSPECTING PROGNOSIS FOR TUDUN, HAMI

  • College of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China

More Information

    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。

    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.

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  • 图 1  研究区所在的大地构造环境(据邵行来等，2010，略修改)

    Figure 1. 

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    图 2  硅酸盐矿物发射率光谱曲线(引自ASU光谱库)

    Figure 2. 

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    图 3  研究区SiO2含量及硅化断裂带分布

    Figure 3. 

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    图 4  研究区断裂分布

    Figure 4. 

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    图 5  含羟基基团矿物波谱曲线

    Figure 5. 

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    图 6  土墩遥感蚀变异常信息图

    Figure 6. 

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    图 7  哈密土墩找矿预测图

    Figure 7. 

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    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Aster1Aster3Aster4Aster8
    PC10.3701190.5528160.6096810.430923
    PC20.6992690.360828-0.537939-0.302404
    PC3-0.1921140.161044-0.5781850.776440
    PC40.580626-0.7336640.0679130.346408
    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Aster1Aster4Aster6Aster7
    PC1-0.374032-0.647138-0.457182-0.481972
    PC2-0.9266100.2410410.2201560.186614
    PC3-0.023652-0.721276-0.4281920.543924
    PC40.021855-0.4425690.860706-0.250680
    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Aster1Aster4Aster6Aster7
    PC10.3628850.5057630.5331170.572979
    PC20.4696160.3771600.162507-0.781539
    PC30.735924-0.153289-0.6140460.240551
    PC4-0.3258700.760563-0.5588600.055022
    下载: 导出CSV
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收稿日期:  2014-11-19
刊出日期:  2015-06-25

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