An Analysis of Different Sedimentary Environment Influence on Pollen Deposit in Beijing

Zhang Jiahua; Kong Zhaochen; Du Naiqiu

In this paper, 197 samples were gathered from a 820cm profile at Dongganchi of Fangshan in Beijing, and the pollen assem-blages, charcoal, loss-on-ignition were obtained, Based on the investigations of pollen assemblages, charcoal, and loss-on-ignitionand comparison with the pollen assemblages of west profile at Dongganchi, Fenzhang profile and Gaoiizhang profile, the differenceslandform units and in different sedimentary environments pollen deposits were discussed. For example, the east and west profiles ofDongganchi are located between two proluvial fans, Fenzhang profile of Fanshan is located in the front of marginal depressions ofproluvial fan, and Gaolizhang profile is located in, alluvial plain. So the primary reason of the decrease of pollen-spore concentration,charcoal and loss-on-ignitions in east and west profiles of Dongganchi since 7000a B. P. was given. An important information couldbe provided for further studies of paleovegetation and paleoclimate research by this.

1. Institute of Remote Sensing Applications,Academia Sinica,Beijing 100101;

2. Institute of Botony,Academia Sinica,Beijing 100093

Received Date: 1996-09-03

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Abstract: In this paper, 197 samples were gathered from a 820cm profile at Dongganchi of Fangshan in Beijing, and the pollen assem-blages, charcoal, loss-on-ignition were obtained, Based on the investigations of pollen assemblages, charcoal, and loss-on-ignitionand comparison with the pollen assemblages of west profile at Dongganchi, Fenzhang profile and Gaoiizhang profile, the differenceslandform units and in different sedimentary environments pollen deposits were discussed. For example, the east and west profiles ofDongganchi are located between two proluvial fans, Fenzhang profile of Fanshan is located in the front of marginal depressions ofproluvial fan, and Gaolizhang profile is located in, alluvial plain. So the primary reason of the decrease of pollen-spore concentration,charcoal and loss-on-ignitions in east and west profiles of Dongganchi since 7000a B. P. was given. An important information couldbe provided for further studies of paleovegetation and paleoclimate research by this.

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Reference (17)

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An Analysis of Different Sedimentary Environment Influence on Pollen Deposit in Beijing

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