金沙江巧家—蒙姑段的阶地发育与河谷地貌演化
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刘芬良, 高红山, 李宗盟, 潘保田, 苏怀
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Terraces development and their implications for valley evolution of the Jinsha River from Qiaojia to Menggu
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LIU Fenliang, GAO Hongshan, LI Zongmeng, PAN Baotian, SU Huai
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表2 金沙江巧家—蒙姑段河流阶地及其相关沉积的ESR年代和相关参数
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Tab. 2 ESR ages and related parameters of fluvial terraces of the Jinsha River from Qiaojia to Menggu
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| 样品编号 | 海拔(m) | U(μg/g) | Th(μg/g) | K2O(%) | 含水量(%) | 剂量率(Gy/ka) | 古剂量(Gy) | 年代(ka) | 采样部位 | | HLK-1 | 647 | 1.17 | 4.77 | 0.86 | 0.34 | 1.65 | 94.1±8.6 | 57±5 | 葫芦口T1 | | HLK-2 | 775 | 2.00 | 8.56 | 2.10 | 3.30 | 3.18 | 1731±260 | 544±82 | 葫芦口T2 | | HLK-3 | 810 | 1.63 | 6.74 | 1.52 | 5.88 | 2.37 | 1934±113.8 | 816±48 | 葫芦口T3 | | HLK-4 | 900 | 2.00 | 8.56 | 2.10 | 3.30 | 3.18 | 2957±294.8 | 930±92 | 葫芦口T4 | | HLK-5 | 958 | 2.22 | 10.3 | 2.43 | 4.31 | 3.61 | 3896±679.9 | 1079±188 | 葫芦口T5 | | HLK-6 | 1015 | 2.17 | 11.4 | 2.02 | 4.77 | 3.29 | 3914±507.0 | 1190±154 | 葫芦口T6 | | QGB-1 | 685 | 1.59 | 7.44 | 1.14 | 0.50 | 2.20 | 58.2±11.1 | 26±5 | 青岗坝T1 | | QGB-2 | 688 | 1.75 | 7.01 | 1.52 | 1.38 | 2.54 | 52.3±1.7 | 20±6 | 青岗坝T1 | | QGB-6 | 920 | 2.13 | 8.44 | 1.86 | 2.74 | 3.01 | 1893±405.7 | 629±134 | 青岗坝T5 |
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