Earth Science Frontiers ›› 2021, Vol. 28 ›› Issue (2): 85-93.DOI: 10.13745/j.esf.sf.2020.9.9
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CHEN Jian1(), CUI Zhijiu2, CHEN Ruichen1, ZHENG Xinxin1
Received:
2020-08-18
Revised:
2020-08-30
Online:
2021-03-25
Published:
2021-04-03
CLC Number:
CHEN Jian, CUI Zhijiu, CHEN Ruichen, ZHENG Xinxin. The origin and evolution of the Temi paleolandslide-dammed lake in the upper Jinsha River[J]. Earth Science Frontiers, 2021, 28(2): 85-93.
样品编号 | 采样地点 | 高程/m | w(U)/10-6 | w(Th)/10-6 | w(K)/% | 水含量/% | 剂量率/(Gy·ka-1) | 等效剂量/Gy | 年龄/ka |
---|---|---|---|---|---|---|---|---|---|
TM-03 | 上游湖相层下部 | 2 472.5 | 2.32 | 10.60 | 1.91 | 1.28 | 3.41±0.17 | 6.0±0.4 | 1.8±0.1 |
TM-04 | 上游湖相层底部 | 2 472.2 | 2.15 | 9.86 | 1.79 | 0.78 | 3.21±0.16 | 5.8±0.5 | 1.8±0.2 |
TM-01 | 下游溃坝堆积层顶部 | 2 469.3 | 1.81 | 8.24 | 1.47 | 0.94 | 2.74±0.13 | 3.8±0.4 | 1.4±0.1 |
TM-02 | 下游溃坝堆积层上部 | 2 469.0 | 1.65 | 6.14 | 1.26 | 0.95 | 2.34±0.11 | 3.7±0.3 | 1.6±0.1 |
Table 1 OSL experimental parameters and dating results
样品编号 | 采样地点 | 高程/m | w(U)/10-6 | w(Th)/10-6 | w(K)/% | 水含量/% | 剂量率/(Gy·ka-1) | 等效剂量/Gy | 年龄/ka |
---|---|---|---|---|---|---|---|---|---|
TM-03 | 上游湖相层下部 | 2 472.5 | 2.32 | 10.60 | 1.91 | 1.28 | 3.41±0.17 | 6.0±0.4 | 1.8±0.1 |
TM-04 | 上游湖相层底部 | 2 472.2 | 2.15 | 9.86 | 1.79 | 0.78 | 3.21±0.16 | 5.8±0.5 | 1.8±0.2 |
TM-01 | 下游溃坝堆积层顶部 | 2 469.3 | 1.81 | 8.24 | 1.47 | 0.94 | 2.74±0.13 | 3.8±0.4 | 1.4±0.1 |
TM-02 | 下游溃坝堆积层上部 | 2 469.0 | 1.65 | 6.14 | 1.26 | 0.95 | 2.34±0.11 | 3.7±0.3 | 1.6±0.1 |
野外编号 | 样品类型 | 采样地点 | 高程/m | 14C年龄/a | 树轮校正后年龄 (2σ,95.4%)/a | 区间概率 |
---|---|---|---|---|---|---|
C9-1 | 黏土 | 右岸湖相层底部 | 2 541 | 6 280±30 | 7 270~7 160 | 0.95 |
C9-2 | 黏土 | 右岸湖相层底部 | 2 540 | 6 995±25 | 7 940~7 890 7 880~7 750 | 0.21 0.75 |
Table 2 Results of AMS-14C geochronologic analysis of lacustrine deposits
野外编号 | 样品类型 | 采样地点 | 高程/m | 14C年龄/a | 树轮校正后年龄 (2σ,95.4%)/a | 区间概率 |
---|---|---|---|---|---|---|
C9-1 | 黏土 | 右岸湖相层底部 | 2 541 | 6 280±30 | 7 270~7 160 | 0.95 |
C9-2 | 黏土 | 右岸湖相层底部 | 2 540 | 6 995±25 | 7 940~7 890 7 880~7 750 | 0.21 0.75 |
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