PROGRESS IN GEOGRAPHY ›› 2022, Vol. 41 ›› Issue (8): 1453-1466.doi: 10.18306/dlkxjz.2022.08.009
• Articles • Previous Articles Next Articles
WANG Na1(), ZHA Xiaochun1,*(
), HUANG Chunchang1, ZHANG Yuzhu2, ZHOU Yali1, PANG Jiangli1, RONG Xiaoqing3, SHANG Ruiqing1, CHAI Jianan1
Received:
2022-01-20
Revised:
2022-03-16
Online:
2022-08-28
Published:
2022-10-25
Contact:
ZHA Xiaochun
E-mail:wn072701@163.com;zhaxch@snnu.edu.cn
Supported by:
WANG Na, ZHA Xiaochun, HUANG Chunchang, ZHANG Yuzhu, ZHOU Yali, PANG Jiangli, RONG Xiaoqing, SHANG Ruiqing, CHAI Jianan. Sedimentary evidence and age of the Zoige Basin dissected by the Yellow River in eastern Tibetan Plateau[J].PROGRESS IN GEOGRAPHY, 2022, 41(8): 1453-1466.
Tab.1
Characteristic values of grain size for each stratum of the OQC profile in the Zoige Basin
地层 编号 | 地层层位 | 黏粒 (<2 μm)/% | 细粉沙 (2~16 μm)/% | 粗粉沙 (16~63 μm)/% | 沙 (>63 μm)/% | 平均粒径 Mz/μm | 标准偏差 | 峰度 | 偏度 |
---|---|---|---|---|---|---|---|---|---|
OQC-1 | 现代草甸土层 | 8.99 | 31.41 | 35.90 | 23.70 | 38.27 | 2.19 | 0.93 | 0.25 |
OQC-2 | 古土壤层 | 10.80 | 26.20 | 34.30 | 28.70 | 44.05 | 2.35 | 0.93 | 0.34 |
OQC-3 | 风成沙层 | 5.27 | 12.01 | 14.00 | 68.72 | 95.05 | 1.96 | 1.61 | 0.66 |
OQC-4 | 古河床河漫滩相沉积层 | 2.41 | 6.37 | 3.51 | 87.71 | 272.57 | 1.38 | 3.29 | 0.46 |
OQC-5 | 古滨浅湖相沉积层 | 12.40 | 36.65 | 38.05 | 12.90 | 25.62 | 2.16 | 0.96 | 0.25 |
OQC-6 | 古深湖相沉积层 | 18.50 | 53.30 | 24.00 | 4.20 | 12.92 | 2.02 | 0.98 | 0.05 |
OQC-7 | 古滨浅湖相沉积层 | 10.90 | 25.70 | 41.50 | 21.90 | 36.18 | 2.21 | 1.01 | 0.40 |
Tab.2
OSL dating results for the OQC profile in the Zoige Basin
样品 编号 | 深度 /cm | 地层层位 | U /10-6 | Th /10-6 | K /% | 含水量 /% | 环境剂量率 /(Gy·ka-1) | 等效剂量 /Gy | OSL年龄 /ka |
---|---|---|---|---|---|---|---|---|---|
OSL-1 | 75~80 | 现代草甸土层底部 | 1.29±0.3 | 8.07±0.6 | 1.72±0.04 | 20±3 | 2.45±0.08 | 6.81±0.14 | 2.79±0.10 |
OSL-2 | 155~160 | 古土壤层底部 | 1.51±0.3 | 8.74±0.6 | 1.57±0.04 | 20±3 | 2.37±0.07 | 20.35±0.68 | 8.59±0.39 |
OSL-3 | 165~170 | 风成沙层顶部 | 1.42±0.3 | 8.94±0.6 | 1.54±0.04 | 21±3 | 2.31±0.07 | 19.68±0.43 | 8.60±0.38 |
OSL-4 | 545~550 | 风成沙层底部 | 1.43±0.3 | 8.14±0.6 | 1.58±0.04 | 21±3 | 2.20±0.07 | 20.29±0.32 | 9.24±0.32 |
OSL-5 | 645~650 | 古河床河漫滩相沉积层上部 | 1.01±0.3 | 5.82±0.6 | 1.47±0.04 | 22±3 | 1.86±0.06 | 24.57±0.92 | 13.20±0.67 |
OSL-6 | 895~900 | 古河床河漫滩相沉积层下部 | 1.73±0.3 | 9.45±0.6 | 1.81±0.04 | 22±3 | 2.44±0.07 | 81.25±0.96 | 33.35±1.06 |
OSL-7 | 955~960 | 古滨浅湖相沉积层顶部 | 3.35±0.4 | 11.23±0.7 | 1.64±0.04 | 23±3 | 2.67±0.08 | 94.00±5.41 | 35.15±2.30 |
OSL-8 | 990~995 | 古滨浅湖相沉积层底部 | 1.86±0.4 | 10.99±0.7 | 1.75±0.04 | 25±3 | 2.42±0.08 | 85.77±4.64 | 35.42±2.40 |
OSL-9 | 1005~1010 | 古深湖相沉积层顶部 | 2.37±0.4 | 14.99±0.7 | 2.43±0.04 | 25±3 | 3.30±0.09 | 122.64±9.39 | 37.17±3.03 |
OSL-10 | 1045~1150 | 古深湖相沉积层底部 | 2.15±0.4 | 10.71±0.7 | 1.97±0.04 | 25±3 | 2.65±0.08 | 105.97±6.56 | 40.01±2.77 |
OSL-11 | 1110~1115 | 古滨浅湖相沉积层顶部 | 1.41±0.3 | 9.22±0.6 | 1.67±0.04 | 25±3 | 2.17±0.07 | 100.27±7.40 | 46.29±3.70 |
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