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宁夏红寺堡盆地地表沙漠化现状及其地质主控因素

黄婷 李振宏 刘锋 崔加伟 董晓朋 赵杨

黄婷, 李振宏, 刘锋, 等, 2018. 宁夏红寺堡盆地地表沙漠化现状及其地质主控因素. 地质力学学报, 24 (4): 505-514. DOI: 10.12090/j.issn.1006-6616.2018.24.04.053
引用本文: 黄婷, 李振宏, 刘锋, 等, 2018. 宁夏红寺堡盆地地表沙漠化现状及其地质主控因素. 地质力学学报, 24 (4): 505-514. DOI: 10.12090/j.issn.1006-6616.2018.24.04.053
HUANG Ting, LI Zhenhong, LIU Feng, et al., 2018. THE CURRENT SITUATION OF DESERTIFICATION IN THE HONGSIBU BASIN, NINGXIA, AND ITS MAIN GEOLOGICAL CONTROLLING FACTORS. Journal of Geomechanics, 24 (4): 505-514. DOI: 10.12090/j.issn.1006-6616.2018.24.04.053
Citation: HUANG Ting, LI Zhenhong, LIU Feng, et al., 2018. THE CURRENT SITUATION OF DESERTIFICATION IN THE HONGSIBU BASIN, NINGXIA, AND ITS MAIN GEOLOGICAL CONTROLLING FACTORS. Journal of Geomechanics, 24 (4): 505-514. DOI: 10.12090/j.issn.1006-6616.2018.24.04.053

宁夏红寺堡盆地地表沙漠化现状及其地质主控因素

doi: 10.12090/j.issn.1006-6616.2018.24.04.053
基金项目: 

中国地质调查局地质调查项目 DD20160060

详细信息
    作者简介:

    黄婷(1992-), 男, 在读硕士, 主要从事构造地质、区域地质方面的研究工作。E-mail:1003721514@qq.com

    通讯作者:

    李振宏(1973-), 男, 副研究员, 主要从事沉积盆地分析、石油地质综合研究、区域地质调查等方面的研究工作。E-mail:lizhennhong@126.com

  • 中图分类号: X141

THE CURRENT SITUATION OF DESERTIFICATION IN THE HONGSIBU BASIN, NINGXIA, AND ITS MAIN GEOLOGICAL CONTROLLING FACTORS

  • 摘要: 以landsand-TM遥感影像资料提取为基础,详细解译了宁夏红寺堡盆地近30年来地表沙漠化的进程。进一步结合1:50000区域地质填图成果,系统建立了红寺堡盆地晚更新世区域地层对比格架,恢复了重要演化阶段的岩相古地理格局,地质与地球化学分析相结合,确立了区域沙漠化的物质来源。研究结果认为:1999年国家实施的西部生态移民战略使红寺堡盆地生态环境恶化得到了有效修复,区域沙漠化整体呈现出了稳中有降的变化趋势,但并未得到彻底的有效根治;地表沙丘沙脊的主体走向呈北西-南东向,与大罗山-牛首山构造带、烟筒山构造的主体走向基本一致,具有带状分布的格局;沙漠化物质来源主要受控于上更新统萨拉乌苏组三段湖退序列的疏松湖相砂,具有原地沙漠化的特征;地表风成沙与萨拉乌苏三段湖相砂在主量元素、微量元素和稀土元素特征上具有比较一致性的变化趋势,进一步说明了二者在成因上具有一定的亲源性。该研究成果对区域土地沙漠化的综合防治具有重要的现实指导意义。

     

  • 图  1  研究区区域构造位置图

    Figure  1.  The regional tectonic location map of the study area

    图  2  宁夏红寺堡盆地新庄集区域地质简图

    Figure  2.  The geological sketch of Xinzhuangji area

    图  3  宁夏红寺堡盆地沙漠化演化过程遥感解译图

    a—landsand-TM遥感数据;b—沙漠化影像数据提取结果

    Figure  3.  The remote sensing interpretation map for desertification evolutional history in Hongsibu Basin, Ningxia

    图  4  红寺堡盆地地表沙漠化典型照片

    Figure  4.  The typical photos for desertification at the surface in Hongsibu Basin, Ningxia

    图  5  红寺堡盆地晚更新世岩相古地理演化图

    Figure  5.  The Late Pleistocene lithofacies paleogeographic map of the Hongsibu Basin, Ningxia

    图  6  红寺堡盆地新庄集地表沙漠化分布图

    Figure  6.  The distribution of desertification at the surface in Hongsibu Basin, Ningxia

    图  7  红寺堡盆地地表沙丘与萨拉乌苏组三段砂地球化学特征曲线

    Figure  7.  The sedimentary geochemical curves of the eolian sands and lacustrine sands from the third part of Salawusu formation in Hongsibu Basin, Ningxia

    表  1  红寺堡盆地沙丘砂和萨拉乌苏三段岩石主量元素含量(%)和微量元素含量(×10-6)

    Table  1.   Bulk rock major (wt%) and trace element (μg/g) compositions of the sands from the dune and Salawusu formation in Hongsibao Basin

    地球化学元素含量 沙丘砂 萨拉乌苏组三段砂
    HSB-1 HSB-2 HSB-3 HSB-4 HSB-5 HSB-6 HSB-7 HSB-8 HSB-9 HSB-10
    SiO2 66.182 62 56.08 69.458 69.042 68.92 53.114 66.09 59.311 63.511
    TiO2 0.556 0.568 0.61 0.497 0.479 0.486 0.614 0.617 0.623 0.594
    Al2O3 10.444 11.012 12.622 10.073 10.062 10.22 12.381 10.422 12.02 10.889
    Fe2O3 3.695 4.101 4.973 3.448 3.294 3.44 5.232 3.872 4.752 4.05
    MnO 0.065 0.073 0.098 0.056 0.054 0.053 0.103 0.07 0.085 0.073
    MgO 2.256 2.405 3.03 2.003 2.035 2.008 3.274 2.319 3.238 2.538
    CaO 5.99 7.193 8.64 4.606 4.998 5.037 10.551 5.876 7.252 6.745
    Na2O 1.915 2.812 1.655 1.9 1.925 1.91 1.513 1.886 1.752 1.875
    K2O 2.236 2.475 2.568 2.234 2.275 2.252 2.625 2.202 2.523 2.299
    P2O5 0.12 0.136 0.154 0.105 0.108 0.113 0.153 0.137 0.156 0.145
    LOI 6.93 7.689 10.415 5.053 5.26 5.369 9.74 6.651 8.25 7.715
    Total 100.389 100.464 100.845 99.433 99.532 99.808 99.3 100.142 99.962 100.434
    La 30.94 32.85 34.54 24.36 23.06 24.44 34.26 33.94 34.98 33.12
    Ce 54.72 57.05 61.57 47.36 44.48 47.39 61.60 60.89 63.46 59.47
    Pr 6.11 6.34 6.68 5.51 5.34 5.69 6.61 6.80 6.80 6.44
    Nd 24.30 25.35 26.87 20.91 19.73 21.15 26.94 27.87 27.63 26.07
    Sm 4.85 4.97 5.23 4.02 3.74 4.08 5.22 5.18 5.32 5.03
    Eu 0.79 0.83 0.88 0.72 0.68 0.70 0.90 0.85 0.87 0.84
    Gd 4.44 4.63 4.79 3.86 3.74 3.89 4.85 4.97 5.01 4.71
    Tb 0.78 0.80 0.81 0.62 0.60 0.65 0.83 0.84 0.86 0.83
    Dy 4.35 4.26 4.28 3.55 3.46 3.68 4.43 4.73 4.71 4.67
    Ho 0.89 0.83 0.86 0.68 0.66 0.71 0.87 0.93 0.92 0.92
    Er 2.63 2.41 2.48 1.99 1.92 2.05 2.50 2.69 2.68 2.71
    Tm 0.42 0.37 0.38 0.31 0.31 0.33 0.38 0.42 0.41 0.43
    Yb 2.63 2.30 2.38 2.07 2.09 2.21 2.33 2.61 2.51 2.61
    Lu 0.43 0.37 0.38 0.32 0.32 0.33 0.38 0.44 0.40 0.41
    Rb 84.44 93.68 108.26 82.33 84.32 83.10 108.86 86.84 103.85 90.25
    Ba 491.26 573.81 574.63 552.93 530.75 534.81 568.52 479.59 551.24 500.85
    Th 17.36 17.63 20.62 16.15 14.51 14.96 20.34 18.31 20.58 17.44
    U 2.71 2.79 3.06 2.33 2.29 2.25 2.97 2.85 2.81 2.71
    Pb 18.96 21.21 24.54 18.14 18.45 18.97 24.44 19.68 22.43 20.11
    Sr 221.20 248.40 277.91 201.52 210.72 213.14 312.74 219.97 248.97 231.04
    Zr 197.01 158.30 128.67 183.75 170.75 155.55 123.26 280.61 155.04 217.14
    Y 22.92 20.83 21.62 16.97 16.46 17.81 21.90 25.67 24.56 25.35
    ΣREE 138.29 143.37 152.12 116.29 110.14 117.3 152.074 153.17 156.55 148.269
    LREE/HREE 7.34 7.98 8.3 7.67 7.41 7.47 8.18 7.69 7.95 7.58
    LaN/YbN 6.83 8.3 8.42 6.84 6.41 6.43 8.54 7.56 8.1 7.38
    δEu 0.51 0.52 0.53 0.55 0.55 0.53 0.54 0.5 0.51 0.52
    下载: 导出CSV
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