Environmental evolution and southwest monsoon changes in mid-Holocene recorded by lake sediments in Erhai Lake  

作　　者：Zhenke Zhang Sumin Wang Ruijin Wu 

机构地区：[1]Chinese Acad Sci, Nanjing Inst Geop & Limnol, Lake Sediment & Environm Lab, Nanjing 210008, Peoples R China [2]Yantai Normal Univ, Dept Geog, Yantai 264025, Peoples R China

出　　处：《Chinese Science Bulletin》1999年第1期94-96,共3页

摘　　要：IN recent years, much progress has been made in the research of the temporal and spatial changes of East Asian monsoon. To research the environmental evolution and monsoon variations in Holocene in the region of Southwest China, a 310-cm continuous lake sediments core in Erhai Lake, Yunnan Province was sampled with Livingston sampler on July 6, 1996. The lake sediments were separated at 2-cm intervals and the core samples were analyzed with chronology, stable isotope ratios of organic carbon and diatoms determination. Three ¹⁴C ages are （4 473±40）a B.P. （98—102 cm）, （5 825±85） a B. P. （144—148 cm） and （7 754±45） a B.P. （198—202 cm）. By ¹³⁷Cs dating, the sedimentation rate is about 0.3 mm/a and this result is close to the ¹⁴C dating results. The average sedimentation rates

关 键 词：LAKE sediments SOUTHWEST MONSOON CHANGES MID-HOLOCENE environmental evolution Erhai Lake. 

分 类 号：P532[天文地球—古生物学与地层学]