乌兰布和沙漠沉积物粒度和地球化学元素特征及其环境意义
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王军广, 董治宝, 刘荣亮, 史际桥
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Characterization of the grain size and geochemical elements of Ulan Buh Desert sediments and their environmental significance
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Junguang Wang, Zhibao Dong, Rongliang Liu, Jiqiao Shi
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表1 研究区沉积物粒级组成
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Table 1 Grain size distribution of sediment in the study area
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| 类型 | 层位 | 部位 | 粒级百分含量/% |
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粗沙 0~1Φ | 中沙 1~2Φ | 细沙 2~3Φ | 极细沙 3~4Φ | 粉沙 4~8Φ |
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| 格状沙丘 | 表层 | 迎风坡坡脚 | 6.92 | 26.66 | 56.90 | 9.28 | 0.22 | | 迎风坡坡中 | 0.63 | 24.51 | 67.91 | 6.93 | 0.02 | | 坡顶 | 1.52 | 35.04 | 61.06 | 2.38 | 0.00 | | 背风坡坡中 | 0.13 | 20.18 | 71.68 | 8.00 | 0.00 | | 背风坡坡脚 | 3.04 | 28.71 | 58.10 | 9.77 | 0.39 | | 均值 | 2.45 | 27.02 | 63.13 | 7.27 | 0.13 | | 下层 | 迎风坡坡脚 | 1.24 | 26.89 | 65.24 | 6.62 | 0.00 | | 迎风坡坡中 | 1.94 | 23.15 | 66.50 | 8.42 | 0.00 | | 坡顶 | 0.19 | 24.40 | 70.76 | 4.65 | 0.00 | | 背风坡坡中 | 1.01 | 24.03 | 67.43 | 7.52 | 0.00 | | 背风坡坡脚 | 1.84 | 25.35 | 64.95 | 7.86 | 0.00 | | 均值 | 1.24 | 24.76 | 66.98 | 7.01 | 0.00 | | 新月形沙丘 | 表层 | 迎风坡坡脚 | 4.62 | 31.04 | 54.13 | 9.92 | 0.30 | | 迎风坡坡中 | 4.19 | 30.77 | 56.24 | 8.38 | 0.42 | | 坡顶 | 0.95 | 32.10 | 62.87 | 3.60 | 0.48 | | 背风坡坡中 | 0.90 | 29.35 | 63.07 | 6.68 | 0.01 | | 背风坡坡脚 | 4.16 | 30.63 | 55.18 | 9.71 | 0.31 | | 均值 | 2.96 | 30.78 | 58.30 | 7.66 | 0.30 | | 下层 | 迎风坡坡脚 | 2.52 | 28.62 | 57.83 | 9.98 | 1.05 | | 迎风坡坡中 | 1.26 | 24.77 | 63.41 | 10.51 | 0.06 | | 坡顶 | 0.00 | 27.25 | 68.30 | 4.44 | 0.00 | | 背风坡坡中 | 0.99 | 23.18 | 66.53 | 9.26 | 0.04 | | 背风坡坡脚 | 2.16 | 22.99 | 60.20 | 11.79 | 2.86 | | 均值 | 1.39 | 25.36 | 63.25 | 9.20 | 0.80 | | 灌丛沙丘 | 表层 | 坡顶 | 0.54 | 20.27 | 59.53 | 18.33 | 1.33 | | 下层 | 坡顶 | 0.32 | 12.26 | 60.50 | 25.55 | 1.37 | | 丘间地 | 表层 | | 5.01 | 20.68 | 52.99 | 18.55 | 2.98 | | 下层 | | 1.36 | 25.61 | 56.01 | 14.30 | 2.73 |
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