Variation of lake water level recorded by grain sizes of sediments from Hetao Paleolake since 150ka
-
摘要:
基于内蒙古河套盆地山前兵房沟湖相层剖面沉积物的粒度记录，结合14C和光释光年代学测试，对比分析沉积物粒度敏感粒级及频率曲线特征，反演了河套古大湖150ka以来的湖泊水位变化。研究结果表明，河套古大湖水位变化经历了4个阶段：① 初始形成阶段（150~130ka），河套古大湖处于浅湖环境，沉积物粒度由粗变细，湖泊处于水位上升期；② 发展阶段（130~54ka），早期湖水面较高，处于深水环境，晚期沉积物粒度逐渐变粗，湖泊水位有所下降；③ 萎缩阶段（54~18ka），湖泊水位快速下降，细粒沉积物含量减少，中粗粒沉积物含量增大，湖泊水位迅速下降；④ 消亡阶段（18ka至今），由于山前活动断裂影响，阴山快速隆升，湖泊急剧萎缩，湖相层顶部被山间冲洪积物覆盖。控制河套古大湖湖泊水位变化的主要因素是构造运动和气候环境突变。
Abstract:Based on size data of Bingfanggou lacustrine sedimentation section, which lies in Hetao basin piedmont, combined with chronologic test of 14C and OSL, the authors comparatively analyzed sediment particle size sensitivity and frequency curve characteris-tics, and made inversion of the lake water level change of Hetao Paleolake since 150ka.The result indicates that the lake water level change of Hetao Paleolake has gone through four stages:① Initial forming stage(150~130ka):Hetao Paleolake was in a shallow lake environment, sediment particle sizes were from coarse to fine, and the water level of the lake was in rising period; ② Developing stage (130~54ka):the lake surface was higher in deep water environment early, sediment particle sizes gradually became thicker and the lake surface declined; ③ Contraction stage (54~18ka):the lake water level dropped rapidly, the fine-grained sediments decreased, and the coarse-grained sediments increased; ④ Demise stage (18ka-now):due to the influence of active faults in piedmont, the Yinshan Mountain uplifted rapidly, the lake atrophied swiftly, the top of the lacustrine strata was covered by diluvial and alluvial materials be-tween the mountains.The main factors controlling the water level change of the paleolake seem to have been the tectonic movement and abrupt change of climate environment.
-
Key words:
- Hetao Paleolake /
- grain size /
- lake level /
- 14C /
- OSL
-
-
表 1 兵房沟剖面AMS14C测试结果和校正
Table 1. Results of AMS14C dating and calibration of the Bingfanggou section
样品编号 BETA实验室编号 深度/m 测试材料 δ13C/‰ 测试年龄/a 校正年龄/a BFC-AMS-5 436741 4.25 钙质粘土 -24.2 17970±60 18270±60 BFC-AMS-28 436742 5.4 钙质粘土 -24.1 41470±530 41840±530 
下载: 导出CSV
表 2 光释光测年样品测试结果及其参数
Table 2. Results of OSL dating and its parameters
原始编号 埋藏深度/m 含水率/% U/10-6 Th/10-6 K/% 剂量率/(Gy·ka-1) 等效剂量/Gy 年龄/ka BFG-OSL-1 7.82 6±3 3.36±0.02 4.41±0.03 2.06±0.03 3.22±0.10 272.11±5.55 84.61±3.21 BFG-OSL-2 8.69 6±3 1.79±0.01 2.34±0.03 1.73±0.02 2.34±0.08 210.53±5.99 89.82±4.08 BFG-OSL-3 10.38 10±5 6.60±0.10 5.54±0.05 1.97±0.02 4.73±0.36 494.62±17.12 104.61±8.65 BFG-OSL-4 13.89 6±3 1.79±0.02 2.33±0.04 1.71±0.01 2.67±0.13 406.25±12.51 152.09±8.76
下载: 导出CSV
-
[1] 孙千里, 周杰, 肖举乐.岱海沉积物粒度特征及其古环境意义[J].海洋地质与第四纪地质, 2001, 21(1):93-95. http://www.cnki.com.cn/Article/CJFDTOTAL-HYDZ200101018.htm
[2] Shuman B, Bravo J, Kaye J, et al. Late Quaternary water-level varia-tions and vegetation history at Crooked Pood, Southeastern Massa-chusetts[J]. Quaternary Research, 2001, 56:401-410. doi: 10.1006/qres.2001.2273
[3] 陈敬安, 万国江, 张峰, 等.不同时间尺度下的湖泊沉积物环境记录-以沉积物粒度为例[J].中国科学(D辑), 2003, 33(6):563-568. http://www.cnki.com.cn/Article/CJFDTOTAL-JDXK200306009.htm
[4] 施祺, 王建民, 陈发虎.石羊河古终端湖泊沉积物粒度特征与沉积环境初探[J].兰州大学学报, 1999, 35(1):194-198. http://www.cnki.com.cn/Article/CJFDTOTAL-LDZK901.036.htm
[5] 李志忠, 海鹰, 罗若愚, 等.乌鲁木齐河下游地区湖泊沉积物的粒度特征与沉积环境[J].干早区研究, 2000, 17(3):1-5. http://www.cnki.com.cn/Article/CJFDTOTAL-GHQJ200003000.htm
[6] Li G Q, Jin M, Chen X M, et al. Environmental changes in the Ulan Buh Desert, southern Inner Mongolia, China since the middle Pleis-tocene based on sedimentology. chronology and proxy indexes[J]. Quaternary Science Reviews, 2015, 128:69-80. doi: 10.1016/j.quascirev.2015.09.010
[7] 陈发虎, 范育新, Madsen D B, 等.河套地区新生代湖泊演化与"吉兰泰-河套"古大湖形成机制的初步研究[J].第四纪研究, 2008, 28(5):866-873. http://www.cnki.com.cn/Article/CJFDTOTAL-DSJJ200805010.htm
[8] 蒋复初, 王书兵, 李朝柱, 等.内蒙古托克托台地湖相地层及其初步意义[J].第四纪研究, 2012, 32(5):866-873. http://www.cnki.com.cn/Article/CJFDTOTAL-DSJJ201205013.htm
[9] 李建彪, 冉勇康, 郭文生.呼包盆地第四纪地层与环境演化[J].第四纪研究, 2007, (4):632-644. http://www.cnki.com.cn/Article/CJFDTOTAL-DSJJ200704020.htm
[10] 贾铁飞, 银山, 赵明, 等.黄河托克托段早中更新世湖相地层剖面的建立及其意义[J].内蒙古师大学报自然科学(汉文)版, 2001, 30(1):74-78. http://www.cnki.com.cn/Article/CJFDTOTAL-NMSB200101019.htm
[11] Ye Z Y, Guo K Z, Zhao S Y, et al. The Current Development and Focal Points in Short-term Water-saving Agriculture in HetaoIrri-gation District[J]. China Rural Water and Hydropower, 2010, 6:81-84.
[12] 公王斌, 胡健民, 李振宏, 等.河套盆地西缘山前低台地沉积特征对"吉兰泰-河套"古湖消退过程及其控制因素的指示意义[J].地学前缘, 2013, 20(4):190-198. http://www.cnki.com.cn/Article/CJFDTOTAL-DXQY201304018.htm
[13] Boulay S, Colin C, Trentesaux A, et al. Mineralogy and Sedimen-tology of Pleistocene Sediment in the South China Sea(ODP Site1144)[J]. Proceedings of the Ocean Drilling Program, 2002, 184(1):1-21.
[14] 汪海斌, 陈发虎, 张家武.黄土高原西部地区黄土粒度的环境指示意义[J].中国沙漠, 2002, 22(1):21-26. http://www.cnki.com.cn/Article/CJFDTOTAL-ZGSS200201004.htm
[15] Prins M A, Postma G, Cleveringa C. Controls on Terrigenous Sedi-ment Supply to the Arabian Sea during the Late Quaternary:The Makran Continental slope[J]. Marine Geology, 2000, 169(3):351-371.
[16] 孙东怀, 安芷生, 苏瑞侠, 等.古环境中沉积物粒度组分分离的数学方法及应用[J].自然科学进展, 2001, 11(3):269-276. http://www.cnki.com.cn/Article/CJFDTOTAL-ZKJZ200103007.htm
[17] 王君波, 朱立平.藏南沉错沉积物的粒度特征及其古环境意义[J].地理科学进展, 2002, 21(5):459-467. doi: 10.11820/dlkxjz.2002.05.007
[18] 李保生, 靳鹤龄, 祝一志, 等.萨拉乌苏河流域第四系岩石地层及其时间界限[J].沉积学报, 2004, 22(4):676-682. http://www.cnki.com.cn/Article/CJFDTOTAL-CJXB200404018.htm
[19] Jia L Y, Zhang X J, Ye P S, et al. Development of the Alluvial and Lacustrine Terraces on the Northern Margin of the Hetao Basin, Inner Mongolia, China:Implication for the Evolution of the Yel-low River in the Hetao Area since the Late Pleistocene[J]. Geomor-phology, 2016, 263:87-98. doi: 10.1016/j.geomorph.2016.03.034
[20] Sun Y B, Clemens S C., An Z S, et al, Astronomical Timescale and Palaeoclimatic Iimplication of Stacked 3.6-Myr Monsoon Records from the Chinese Loess Plateau[J]. Quaternary Science Reviews, 2006, 25(1/2):33-48.
[21] 陈发虎, 范育新, 春喜, 等.晚第四纪"吉兰泰-河套"古大湖的初步研究[J].科学通报, 2008, 10(53):1207-1219. http://www.cnki.com.cn/Article/CJFDTOTAL-KXTB200810013.htm
[22] 李建彪, 冉勇康, 郭文生.河套盆地托克托台地湖相层研究[J].第四纪研究, 2005, 25(5):630-639. http://www.cnki.com.cn/Article/CJFDTOTAL-DSJJ200505011.htm
[23] 李建彪. 河套盆地晚第四纪成湖环境变化与构造活动研究[D]. 中国地震局地质研究所博士学位论文, 2006.
[24] 马保起, 李德文, 郭文生.晚更新世晚期呼包盆地环境演化与地貌响应[J].第四纪研究, 2004, 24(6):630-637. http://www.cnki.com.cn/Article/CJFDTOTAL-DSJJ200406004.htm
[25] 鹿化煜, 周亚利, Mason J, 等.中国北方晚第四纪气候变化的沙漠与黄土记录——以光释光年代为基础的直接对比[J].第四纪研究, 2006, 26(6):888-894. http://www.cnki.com.cn/Article/CJFDTOTAL-DSJJ200606001.htm
[26] 何泽新, 张绪教, 贾丽云, 等.内蒙古狼山山前台地成因及其新构造运动意义[J].现代地质, 2014, 28(1):98-108. http://www.cnki.com.cn/Article/CJFDTOTAL-XDDZ201401010.htm
-
图(5)
表(2)
计量
- 文章访问数: 1125
- PDF下载数: 7
- 施引文献: 0