| ANNUAL LAMINATIONS IN THE SEDIMENTS OF HONGFENG LAKE, CHINA |
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| 作者姓名： | Wu Fengchang Wan Guojiang |
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| 作者单位： | State Key Laboratory of Environmental Geochemistry，Institute of Geochemistry，the Chinese Academy of Sciences，Guiyang 550002，PRC |
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| 摘 要： | ＡＮＮＵＡＬ ＬＡＭＩＮＡＴＩＯＮＳ ＩＮ ＴＨＥ ＳＥＤＩＭＥＮＴＳ ＯＦ ＨＯＮＧＦＥＮＧ ＬＡＫＥ， ＣＨＩＮＡＡＮＮＵＡＬＬＡＭＩＮＡＴＩＯＮＳＩＮＴＨＥＳＥＤＩＭＥＮＴＳＯＦＨＯＮＧＦＥＮＧＬＡＫＥ，ＣＨＩＮＡ￥ＷｕＦｅｎｇｃｈａｎｇ；Ｗａ...
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| 收稿时间： | 15 March 1996 |
Annual laminations in the sediments of Hongfeng Lake,China |
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| Wu Fengchang, Wan Guojiang.ANNUAL LAMINATIONS IN THE SEDIMENTS OF HONGFENG LAKE, CHINA[J].Chinese Geographical Science,1996,6(4):375-382. |
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| Authors: | Fengchang Wu Guojiang Wan |
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| Institution: | (1) State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, the Chinese Academy of Sciences, 550002 Guiyang, PRC |
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| Abstract: | Hongfeng Lake is an eutrophic freshwater artificial reservior. It began to restore water in 1960. Three sediment cores were
taken from beneth about 25 m of water in the center of Hongfeng Lake in May 1991. The stratigraphy of the three cores was
easily matched by using prominent marking horizons and characteristic seqnences of laminations. In three layer samples studied,
diatom and other algae taxa appear in repeating sequences. The presence of laminations may reflect either the regular changes
of physical-chemical conditions within the lake or the variation in the intensity of erosion and transport of material from
the catchment, part iculaly where instability in the lake-water system has occurred as a result of human activities. The laminations
were mainly caused by seasonal variation of environmental conditions, particularly climate. Unlike most of the previous examples,
they have been formed at most recent sediments, in a small freshwater lake in the eastern slope of the Qinghai-Xizang Plateau,
China in a subtropical climate, which is mainly controlled by southeastern and southwestern monsoon. It is believed that it’s
the first reported instance of laminated lake sediments from China.
Supported by National Natural Science Foundation of China |
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| Keywords: | annual laminations Hongfeng Lake carbonate geochemistry |
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