| 引用本文: | 薛滨,瞿文川,吴艳宏,王苏民,吴瑞金.太湖晚冰期—全新世气候、环境变化的沉积记录.湖泊科学,1998,10(2):30-36. DOI:10.18307/1998.0206 |
| Xue Bin,Qu Wenchuan,Wu Yanhong,Wang Sumin,Wu Ruijin.Sedimentological Record of Paleoenvironm ent of Taihu Lake in Late—Glacial to Holocene. J. Lake Sci.1998,10(2):30-36. DOI:10.18307/1998.0206 |
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| 摘要: |
| 本文根据西太湖3.96m长湖泊岩芯沉积物的地球化学、微体占生物的综合分析.讨论了太湖距今14000多年来的演化过程,结果表明：14300-13000aBP气候干旱,西太湖尚未形成；13000-11030aBP降水增加,湖泊形成.但气候偏凉；11030-10200aBP是一个较显著的冷偏湿期.湖泊水位相对较深；10200-9500aBP为一温干时期；9500-7200aBP是偏暖湿的过渡阶段.内部波动剧烈；7200-5700aBP为一暖湿期；5700-4900aBP各项指标发生突变,地层存在沉积间断；4900aBP至今,湖泊水深减小,湖底沉积物受波浪扰动,藻类生长茂盛,富营养化程度逐渐严重. |
| 关键词: 太湖 14ka 环境变化 沉积记录 |
| DOI：10.18307/1998.0206 |
| 分类号: |
| 基金项目:中国科学院院重大项目（KZ951-A-402）;湖沼专项课题 |
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| Sedimentological Record of Paleoenvironm ent of Taihu Lake in Late—Glacial to Holocene |
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Xue Bin, Qu Wenchuan, Wu Yanhong, Wang Sumin, Wu Ruijin
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Lake Sedimentation and Enviroment Lab., Nanjing Institute of Geography and Limnology, CAS, Nanjing 210008
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| Abstract: |
| According to the analysis on TOC,TN.pigment,organic carbon isotope.HI and "Cdating etc. obtained from the sedim ents of a 3.96m-long core in W est Taihu Lake、it ispossible to understand the evolution of paleoenvironment during the last 14000 years inTaihu Lake. The results show that the evolution of paleoenvironment has undergone thefollowing stages:Before West Taihu Lake was formed.there existed exposed feature fromthe proxies in l 4300-13000aBP.reflecting arid paleoclimate.After the lake was formed.the climate got CO0l in 13000~ l 1030aBP. All proxies showed a distinct cold and wetterclimate in l1030~ 10200aBP. It was a warm and dry period in 10200-9500aBP.and thenturned into a transitional stage of warmer and wetter climate with drastic fluctuation.It waswarm and wet during 7200-5700aBP,Some proxies changed violently in 570O-4900aBP.reflecting a probable interruption of sedimentation. The lake began to be eutrophic in4900aBP or later. |
| Key words: Taihu Lake 14ka environm ental change sedimentological record |
