贵州高原北部河流阶地发育与喀斯特地貌演化
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蒋玺, 陈文奇, 宁凡, 孙玉慧, 敖进, 罗维均, 况光显
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River terraces in the northern Guizhou Plateau and their implications for karst landform evolution
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JIANG Xi, CHEN Wenqi, NING Fan, SUN Yuhui, AO Jin, LUO Weijun, KUANG Guangxian
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表1 绥阳盆地和旺草盆地河流阶地OSL测年结果
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Tab. 1 OSL dating results of terrace sediment in Suiyang Basin and Wangcao Basin
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样品
编号 | 埋深
(m) | U-238
(Bg/kg) | Ra-226
(Bg/kg) | Th-232
(Bg/kg) | K-40
(Bg/kg) | 含水量
(%) | 环境剂量率
(Gy/ka) | 等效剂量
(Gy) | 年龄
(ka) | | SY-T1-1 | 1.0 | 100.0±10.1 | 76.5±1.0 | 65.0±0.7 | 601.8±11.3 | 18 | 4.9±0.2 | 40.2±1.3 | 8.2±0.5 | | SY-T1-2 | 2.2 | 40.2±6.6 | 22.0±0.5 | 32.9±0.4 | 358.7±7.2 | 15 | 2.4±0.1 | 40.2±1.0 | 16.7±0.8 | | SY-T1-3 | 2.7 | 22.9±5.9 | 20.4±0.4 | 31.5±0.4 | 348.8±6.8 | 18 | 2.2±0.1 | 40.8±1.4 | 18.8±1.1 | | SY-T2-1 | 1.1 | 36.3±7.0 | 23.5±0.5 | 50.8±0.6 | 430.4±8.2 | 16 | 3.0±0.1 | 316.7±16.7 | 104.1±7.2 | | SY-T2-2 | 3.6 | 55.6±7.9 | 32.4±0.6 | 56.8±0.6 | 464.9±9.0 | 32 | 3.0±0.2 | 430.0±8.0 | 144.4±10.7 | | WC-T1-1 | 0.5 | 44.5±8.4 | 40.3±0.7 | 68.0±0.7 | 863.3±16.7 | 23 | 4.6±0.2 | 28.5±0.8 | 5.5±0.3 | | WC-T2-2 | 3.6 | 55.3±8.4 | 34.3±0.6 | 71.7±0.7 | 729.3±12.8 | 25 | 4.2±0.2 | 186.2±8.4 | 45.1±3.2 |
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