GRAIN-SIZE CHARACTERISTICS AND ITS ENVIRONMENTAL SIGNIFICANCE OF LAKE CHENPUHAI SEDIMENTS IN HETAO PLAIN, INNER MONGOLIA
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摘要: 对河套地区陈普海子湖泊及其流域不同类型表层沉积物的粒度特征进行了分析,并结合放射性同位素210Pb测年,探讨了湖泊的沉积演变过程。通过主成分分析,对沉积物剖面粒度不同粒级组分含量进行了研究,分析了湖泊沉积物的物质来源,得到两个主控因子F1和F2,它们控制了湖泊沉积物近98.68%的粒度变化特征。研究表明,F1代表了以6.18 μm为众数粒径的次总体,主要受流水作用控制;而F2为以42.75 μm为众数粒径的次总体,主要来源于地表风沙作用。通过粒径-标准偏差方法,提取了湖泊沉积物中不同时期的环境敏感粒度组分,结果表明:在1996AD之前,流水作用所携带的细颗粒(μm)决定了沉积物的粒级特征,在1960-1985AD期间表现出风沙活动强烈;1996AD以来,由于人类开展了大规模的沙荒土地开垦,流沙活动强烈,流域风沙活动所携带的粗颗粒(14.1~224.35 μm)控制了沉积物的粒度组成。Abstract: This paper is devoted to the grain-size characteristics of the surficial sediments of the Lake Chenpuhai. Combined with the radiocarbon dating data of 210Pb, environmental evolution of the lake is revealed. Primary components of the sediment are used for study of the source of the lake sediment. Two main controlling factors, which account for 98.68% of the sediment, are picked out by statistic analysis. It shows that coarse fraction of the lake sediment is of fluvial origin in addition to fine fraction of eolian origin. Environmentally sensitive grain-size components were extracted by the variation in grain-size standard deviation. The results indicate that before 1996 AD, the fine particle (μm) carried by fluvial water dominated the sediments. Severe sand-dust storm occurred during 1960-1985 AD and had brought great impact to the characteristic of the sediment; since 1996 AD, as a result of the human made large-scale land reclamation and strong sand activities, coarse particle (14.1~224.35μm) carried by sand storms dominated the lake sediments.
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Key words:
- lacustrine sediment /
- grain-size /
- environmental change /
- Lake Chenpuhai
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[1] 王苏民,窦鸿身. 中国湖泊志[M]. 北京:科学出版社,1998:374-377.[WANG Sumin,DOU Hongshen. Memoirs of Lakes in China[M]. Beijing:Science Press,1988:374
-377.]
[2] 沈吉. 湖泊沉积研究的历史进展与展望[J]. 湖泊科学,2009,21(3):307-313.
[SHEN Ji. Progress and prospect of palaeolimnology research in China[J]. Journal of Lake Science,2009,21(3):307-313.]
[3] 马龙,吴敬禄,吉力力. 新疆柴窝堡湖沉积物中环境敏感粒度组分揭示的环境信息[J]. 沉积学报,2013,30(5):945-954.
[MA Long,WU Jinglu,JI Lili. Environmental changes inferred from environmentally sensitive Grain-size component records in Chaiwopu Lake, Xinjiang[J]. Acta Sedimentologica Sinica,2013,30(5):945-954.]
[4] Chen Guangquan,Yi Liang,Chen Shenliang,et al. Partitioning of grain-size components of estuarine sediments and implications for sediment transport in southwestern Laizhou Bay, China[J]. Chinese Journal of Oceanology and Limnology, 2013,31(4):895-906.
[5] 王君兰,李晖, 邓伟,等. 内蒙古嘎顺诺尔湖泊沉积物磁化率与粒度的古环境意义[J]. 中国沙漠,2012,32(3):661-668.
[WANG Junlan,LI Hui,DENG Wei,et al. Paleoenvironmental significance of magnetic susceptibility and grain size of lake sediments from Gaxun Nur, Inner Mongolia, China[J]. Journal of Desert Research,2012,32(3):661-668.]
[6] 沈吉,汪勇,羊向东,等. 湖泊沉积记录的区域风沙特征及湖泊演化历史:以陕西红碱淖湖泊为例[J].科学通报,2006,51(1):87-92.
[SHEN Ji,WANG Yong,YANG Xiangdong,et al. Paleosandstorm characteristics and lake evolution history deduced from investigation on lacustrine sediments:the case of Hongjiannao Lake, Shaanxi Province[J]. Chinese Science Bulletin,2005,50(20):2355-2361.]
[7] 强明瑞,陈发虎,周爱锋,等. 苏干湖沉积物粒度组成记录尘暴事件的初步研究[J]. 第四纪研究,2006,26(6):915-922.
[QIANG Mingrui,CHEN Fahu,ZHOU Aifeng,et al. Preliminary study on dust storm events documented by grain size component of Sugan Lake sediments, North Qaidam Basin[J]. Quaternary Sciences,2006,26(6):915-922.]
[8] 金章东,王苏民,沈吉,等. 岱海地区近400年来的尘暴事件-来自岱海沉积物粒度的证据[J]. 湖泊科学,2000,12(3):193-198.
[JIN Zhangdong,WANG Sumin,SHEN Ji,et al. Dust storm events in Daihai Lake area, Inner Mongolia during the past 400 years:evidence from grain-size analysis of lake sediments[J]. Journal of Lake Sciences,2000,12(3):193-198.]
[9] 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.
[SUN Qianli,ZHOU Jie,XIAO Jule. Grain-size characteristics of Lake Daihai sediments and its paleoenvironment significance[J]. Marine Geology and Quaternary Geology,2001,21(1):93-95.]
[10] 高存荣,刘文波,刘滨,等. 河套平原第四纪沉积物中砷的赋存形态分析[J]. 中国地质,2010,37(3):760-770.
[GAO Cunrong,LIU Wenbo,LIU Bin,et al. Modes of occurrence of arsenic in Quaternary sediments of the Hetao Plain[J]. Geology in China,2010,37(3):760-770.]
[11] 王玉魁,阎艳霞,王保平,等. 乌兰布和沙漠沙尘天气的气象条件分析[J]. 林业科学,2007,43(1):22-27.
[WANG Yukui,YAN Yanxia,WANG Baoping,et al. Weather condition analysis on dust events of Ulanbuh Desert[J]. Scientia Silvae Sinica,2007,43(1):22-27.]
[12] 董智,李红丽,孙保平,等. 乌兰布和沙漠东北缘磴口县沙尘天气变化规律及其对防护林体系建设的响应[J]. 干旱区资源与环境,2004,18(1):269-275.
[DONG Zhi,LI Hongli,SUN Baoping,et al. The change of sand-wind climate and response to the shelter belt system construction in the Northeastern Ulanbuh Desert[J]. Journal of Arid Land Resources and Environment,2004,18(1):269-275.]
[13] Appleby P G,Oldfield F. The calculation of 210Pb assuming a constant rate of supply of unsupported 210Pb to the sediment[J]. Catena,1978,5(1):18.
[14] 马龙,吴敬禄. 内蒙古乌梁素海湖泊沉积物元素地球化学特征及其影响因素[J]. 海洋地质与第四纪地质,2010,30(3):119-125.
[MA Long,WU Jinglu. Element geochemical characteristic of lake sediments and its influence factors in wuliangsuhai lake, Inner Mongolia[J]. Marine Geology and Quaternary Geology,2010,30(3):119-125.]
[15] 张敬, 牟德海, 杜金洲, 等. 过剩210Pb年代学的多种计算模式的比较研究[J]. 海洋环境科学,2008,27(4):370-374
,382.[ZHANG Jing,MU Dehai,DU Jinzhou,et al. Study on comparison of excess 210Pb chronology of several models[J]. Marine Environmental Science,2008,27(4):370-374,382.]
[16] 万国江. 现代沉积的210Pb计年[J]. 第四纪研究,1997,17(3):230-239.
[WAN Guojiang. 210Pb dating for recent sedimentation[J]. Quaternary Sciences,1997,17(3):230-239.]
[17] 姜在兴. 沉积学[M]. 北京:石油工业出版社,2003:74-75.[JIANG Zaixing. Sedimentology[M]. Beijing:Petroleum Industry Press,2003:74
-75.]
[18] Liu Z,Colin C,Trentesaux A,et al. Late quaternary climatic control on erosion and weathering in the eastern Tibetan Plateau and the Mekong Basin[J]. Quaternary Research,2005,63(3):316-328.
[19] Guan Q, Pan B,Li N,et al. An indicator of sand storms in the south of the Tengger Desert[J]. Theoretical and Applied Climatology,2010,102(1):197-203.
[20] 孙有斌,高抒,李军. 边缘海陆源物质中环境敏感粒度组分的初步分析[J]. 科学通报,2003,48(1):83-86.
[SUN Youbin,GAO Shu,LI Jun. Preliminary analysis of grain-size populations with environmentally sensitive terrigenous components in marginal sea setting[J]. Chinese Science Bulletin,2003,48(1):83-86.]
[21] 张国庆. 乌兰布和沙漠东北部磴口县生态环境受水资源的影响及对策[J]. 内蒙古水利,2007,4:80-81.[ZHANG Guoqing. The measure of ecological environment influenced by water resources in Dengkou county of the northeast of Ulan Buh Desert[J]. Inner Mongolia Water Resources,2007
,4:80-81.]
[22] 马龙,吴敬禄,温军会,等. 乌梁素海湖泊沉积物粒度特征及其环境指示意义[J]. 沉积学报,2013,31(4):646-652.
[MA Long,WU Jinglu,WEN Junhui,et al. Grain size characteristics and environmental significance of lacustrine sediment recorded in Wuliangsu Lake, Inner Mongolia[J]. Acta Sedimentologica Sinica,2013,31(4):646-652.]
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