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基于ASTER-GDEM数据的羊卓雍错地区构造地貌分析

陈麒光 邵兆刚 韩建恩 孟宪刚 余佳 王津

陈麒光, 邵兆刚, 韩建恩, 等, 2014. 基于ASTER-GDEM数据的羊卓雍错地区构造地貌分析. 地质力学学报, 20 (3): 304-316.
引用本文: 陈麒光, 邵兆刚, 韩建恩, 等, 2014. 基于ASTER-GDEM数据的羊卓雍错地区构造地貌分析. 地质力学学报, 20 (3): 304-316.
CHEN Qi-guang, SHAO Zhao-gang, HAN Jian-en, et al., 2014. ANALYSIS OF GEOMORPHOLOGIC CHARACTERISTICS OF THE YAMZHO YUMCO REGION BASED ON ASTER-GDEM. Journal of Geomechanics, 20 (3): 304-316.
Citation: CHEN Qi-guang, SHAO Zhao-gang, HAN Jian-en, et al., 2014. ANALYSIS OF GEOMORPHOLOGIC CHARACTERISTICS OF THE YAMZHO YUMCO REGION BASED ON ASTER-GDEM. Journal of Geomechanics, 20 (3): 304-316.

基于ASTER-GDEM数据的羊卓雍错地区构造地貌分析

基金项目: 

中国地质调查局地质调查项目"青藏高原气候变化湖泊沉积记录研究" 12120113006100

详细信息
    作者简介:

    陈麒光(1987-), 男, 硕士研究生, 主要从事区域地质与环境研究。E-mail:jj5279@sina.com

  • 中图分类号: P542

ANALYSIS OF GEOMORPHOLOGIC CHARACTERISTICS OF THE YAMZHO YUMCO REGION BASED ON ASTER-GDEM

  • 摘要: 基于ASTER-GDEM数据, 运用GIS空间分析统计技术, 通过对数字地形高程、地表起伏度、地表坡度等地貌参数的统计和条带剖面及面积-高程积分等数字地貌分析, 结合前人的区域地质资料及野外实地调查和验证, 对藏南羊卓雍错地区的构造地貌特征进行了初步分析, 旨在为研究区的盆地地貌格局演化分析提供依据。研究结果表明, 研究区构造地貌总体为一近东西向盆地, 最高海拔7515 m, 最低海拔2581 m, 属于高海拔-极高海拔区域; 流域内以平原和丘陵地貌为主, 平均起伏度为314 m, 平均坡度19°, 地势起伏较小, 发育有三级层状地貌; 盆地边缘受断裂的控制, 构造现象发育, 线性影像特征明显。其东、西部分别受桑日-错那断陷带和亚东-露谷断陷带所围限, 具有多期构造活动特征。盆地南北两侧受绒布-哲古断裂和邛多江断裂控制较弱。受构造活动和地表水流综合作用的影响, 盆地内部地貌已进入老龄化阶段。

     

  • 图  1  羊卓雍错地区地质简图(据文献[8]略改)

    Figure  1.  Geological map in the YamzhoYumco region

    图  2  羊卓雍错地区DEM图

    Figure  2.  DEM image of the YamzhoYumco region

    图  3  羊卓雍错地区4种高程图

    a-平均高程图;b-最大高程图;c-最小高程图;d-地势起伏度图

    Figure  3.  Four types of DEM maps of the YamzhoYumco region

    图  4  羊卓雍错地区地貌特征与湖相沉积

    a-盆内丘陵地貌;b-盆内平原地貌及河流侵蚀V型谷;c-盆地边缘陡峭山体;d-高位湖相沉积(海拔4844m)

    Figure  4.  Geomorphologic characteristics of the YamzhoYumco region and it's lake sediments

    图  5  羊卓雍错地区坡度统计直方图

    Figure  5.  Slope statistics of the Yamzho Yumco region

    图  6  羊卓雍错地区坡度分级示意图

    ①-雅鲁藏布江构造带;②-桑日-错那断陷带;③-亚东-露谷断陷带;④-邛多江断裂;⑤-绒布-哲古断裂

    Figure  6.  Slope classification schematic diagram of the YamzhoYumco region

    图  7  羊卓雍错地区A、B、C条带剖面图

    ① 康马-羊八井-那曲断陷带;② 桑日-错那断陷带;③ 札达-拉孜-邛多江断裂;④ 绒布-古堆断裂;⑤ 雅鲁藏布构造带

    Figure  7.  Swath profile graph of the YamzhoYumco region

    图  8  羊卓雍错流域示意图

    Figure  8.  The YamzhoYumco watershed range diagram based on DEM

    图  9  羊卓雍错流域面积—高程积分曲线图

    Figure  9.  Curve of hypsometric integral in the YamzhoYumco watershed

    表  1  羊卓雍错地区高程统计

    Table  1.   Height statistics of the YamzhoYumco region

    高程/m 百分比/% 累计百分比/%
    < 3500(中海拔) 0.23 0.23
    3500~5000(高海拔) 3500~4000 8.25 8.48
    4000~4500 19.42 27.90
    4500~5000 37.19 65.09
    > 5000(极高海拔) 34.91 100.00
    下载: 导出CSV

    表  2  羊卓雍错地区地势起伏度统计

    Table  2.   Amplitude statistics of the YamzhoYumco region

    起伏度划分/m 平原 丘陵 小起伏山地 中起伏山地 大起伏山地
    0~30 30~200 200~500 500~1000 1000~2500
    百分比/% 2.45 22.83 62.44 12.10 0.18
    累计百分比/% 2.45 25.28 87.72 99.82 100.00
    下载: 导出CSV
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