Pollen Record and Its Palaeoclimatic Significance Between 800-150Ka. B. P. from RH-core in Zoige Basin in Qinghai-Xizang ( Tibet ) Plateau

Liu Guang; Shen Yongping; Zhang Pingzhong; Wang Suping

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Article Navigation > Acta Sedimentologica Sinica > 1994 > 12(4): 101-109

Liu Guang, Shen Yongping, Zhang Pingzhong, Wang Suping. Pollen Record and Its Palaeoclimatic Significance Between 800-150Ka. B. P. from RH-core in Zoige Basin in Qinghai-Xizang ( Tibet ) Plateau[J]. Acta Sedimentologica Sinica, 1994, 12(4): 101-109.

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Pollen Record and Its Palaeoclimatic Significance Between 800-150Ka. B. P. from RH-core in Zoige Basin in Qinghai-Xizang ( Tibet ) Plateau

1 Lanzhou Institute of Glaciology and Geoeryology, Chinese Academy of Sciences,Lanzhou 730000;
2 State Key Laboratory of Gas Geochemistry, Lanzhou Institute of Geology, Chinese Academy of Sciences, Ianzhou 730000;
3 Laboratory of Lae Sediment and Environment, Nanjing Institute of Geography and Lakes. Chinese Academy of Sciences, Nanjing 21008

Received Date: 1994-02-23
Publish Date: 1994-12-10

Abstract

The climate change between 800^-150Ka B. P. reflected by pollen record from RH-core in Zoige Basin，located in the northeastern part of Qinghai-Xizang ( Tibet)Plateau, is in close relationship with that showed by oxygen isotope record of deep sea，loess records in central China，and organic carbon content and hydrogen index records in this core. According to the concentration，amounts and types of pollen and spores, the pollen assemblage of RH-core can be divided into 19 zones, which indicates the unstability of climate and shows the sensitivity to climatic changes in the region. According to the pollen record，there were two bigger colder stages ( glaciation)and one warmer stage (interglaciation) between 800-150Ka. B. P. in this region. Earlier glaciation, i. e.，the third glaciation from the last took place about 710^-529Ka B. P. corresponding to MIS-18 to 16，later one ( i. e. the Penulitimate glaciation ) occured about 298~128Ka B. P.，corresponding to M1S-8 to 6. During the glaciations, the pollen concentration was very lower，there are fewer.4Ttemisia presented. A big warmer stage (big interglaction) took place about 480^-298Ka B. P.，and the contents of pollen were mainly Abees, PiQea，Be}la，Craminene Cyperacese and Arte>nisia，which reflects warm and little dry climate. In these stages，there were geomorphological and lithological changes stongly on the earth surface. The pollen record RH-core shows that the climatic changes since 800Ka B. P. are frequent in Zoige Basin，and the ranges are bigger，but in general，the cold are dominated. Meanwhile, the frequent fluctuation of pollen assemblage reflects that the ecosystem of the regiion is weaker，when suffering from environmental forcing it will be changed soon.

References

[1]	冯兆东，1990.美国陆地第四纪研究近年来的主要成果与问题，冰川冻土，12(3);251~258.
[2]	刘光秀、沈永平、王苏民，1994，若尔盖RH孔150Ka以来的植被历史及其气候记录，见:青截高原形成演化、环境变迁与生态系统研究学术论文年刊(1994)，科学出版社，北京:199~208.
[3]	李吉均等.1979.青截高原隆起的时代、幅度及形式探讨，中国科学，6,608~616,
[4]	李吉均、郑本兴等.1986，西截冰川，科学出版社，北京，251~276,
[5]	李吉均等.1991，青截高原第四纪冰川遗迹分布图(说明书)，科学出版社，北京，4~5.
[6]	吴锡浩等，1991,陕西蓝田黄土地层中的两次天文学地质事件记录，科学通报，36(23):1799~1802,
[7]	沈永平等，1989，西藏聂拉木冰破平台古土城的发生学及环境的初步研究，冰川冻土，11(3):269~278,
[8]	张平中等,1994，青藏高原东部若尔盖盆地RH孔沉积有机质的bt3C值和氮指数(H1)记录及其环境意义，见:青藏高原形成演化、环境变迁与生态系统研究学术论文年刊(1994),科学出版社，北京:209---217,
[9]	郑本兴等，1976，珠穆朗玛峰地区第四纪冰期探讨，见:珠穆朗玛峰地区科学考察报告(1966~1968)(第四纪地质)，科学出版社，北京,29~60.
[10]	郑本兴等，1990，青藏高原第四纪冰期年代研究的新进展，科学通报，35(7);533~537,
[11]	周尚哲等,1994,黄河源区更新世冰盖的初步研究，地理学报，99(1):64~72,
[12]	徐钦奇，1992，中更新世以来兽类地理分布的变化及其天文气候学的解释，古脊椎动物学报，30(3):233~291,
[13]	徐钦奇，1993,青藏高原更新世冰期的夭文学气候依据，冰川冻土，15(3);435~441,
[14]	黄万波等,1982，安徽和县猿人化石及有关问题的初步研究，古脊椎动物与古人类，20(3):248~255,
[15]	黄万波，1985,我国东部洞穴与猿人生息相关的一些间题，见:喀斯特地貌与洞穴，科学出版社，北京，109-112,
[16]	黄培华等，1991，北京狠人第一个头盖骨及其遗址堆积层的电子自旋共振测年研究，科学通报，36(2):133~136.
[17]	Kas6iwaya, K, Yamamoto, A and Fukuyana, K, 1988. Statistical analysis of grain size distribution in Pleistocene Sediments from Lake Biwa, Japan. Quaternary Research. 30: 12~18.
[18]	KukJa, G. 1977, Pleistocene land-sea correlation I; Europe. Earth-Science Reviews, 13(4):307-374.
[19]	Kukla, G. 1987, Loess stratigraphy in Central China. Quaternary Science Reviews. 6; 191~219.
[20]	Liu Tongsheng, et al, 1986, Stratigraphy and Palaeoenvironmental Changes in the loess of Central China. Quaternary Science Reviews. 5; 135~160.
[21]	Shen Yongping, et al, 1989, Correlation of the ice age and loess deposit sequence in the region of the Mt. Dali加，Gansu ,China. Journal of Lanzhou University. Special issue on international workshop on loess geomorphological processes and harzards. 109 ~119.
[22]	Williams. D. F. et al. 1988 Chrono logy of the Pleistocene Oxygen isotope record: 0~1. 88My. B. P.，Paleeogeogr.221-240.
[23]	Zheng Benxing, 1988. Quaternary glaciation of Mt. Qumolangma一Xixabengma region. Geo Journal. 17 (4 ):525~543.

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Pollen Record and Its Palaeoclimatic Significance Between 800-150Ka. B. P. from RH-core in Zoige Basin in Qinghai-Xizang ( Tibet ) Plateau

1 Lanzhou Institute of Glaciology and Geoeryology, Chinese Academy of Sciences,Lanzhou 730000;

2 State Key Laboratory of Gas Geochemistry, Lanzhou Institute of Geology, Chinese Academy of Sciences, Ianzhou 730000;

3 Laboratory of Lae Sediment and Environment, Nanjing Institute of Geography and Lakes. Chinese Academy of Sciences, Nanjing 21008

Received Date: 1994-02-23

Publish Date: 1994-12-10

Abstract: The climate change between 800^-150Ka B. P. reflected by pollen record from RH-core in Zoige Basin，located in the northeastern part of Qinghai-Xizang ( Tibet)Plateau, is in close relationship with that showed by oxygen isotope record of deep sea，loess records in central China，and organic carbon content and hydrogen index records in this core. According to the concentration，amounts and types of pollen and spores, the pollen assemblage of RH-core can be divided into 19 zones, which indicates the unstability of climate and shows the sensitivity to climatic changes in the region. According to the pollen record，there were two bigger colder stages ( glaciation)and one warmer stage (interglaciation) between 800-150Ka. B. P. in this region. Earlier glaciation, i. e.，the third glaciation from the last took place about 710^-529Ka B. P. corresponding to MIS-18 to 16，later one ( i. e. the Penulitimate glaciation ) occured about 298~128Ka B. P.，corresponding to M1S-8 to 6. During the glaciations, the pollen concentration was very lower，there are fewer.4Ttemisia presented. A big warmer stage (big interglaction) took place about 480^-298Ka B. P.，and the contents of pollen were mainly Abees, PiQea，Be}la，Craminene Cyperacese and Arte>nisia，which reflects warm and little dry climate. In these stages，there were geomorphological and lithological changes stongly on the earth surface. The pollen record RH-core shows that the climatic changes since 800Ka B. P. are frequent in Zoige Basin，and the ranges are bigger，but in general，the cold are dominated. Meanwhile, the frequent fluctuation of pollen assemblage reflects that the ecosystem of the regiion is weaker，when suffering from environmental forcing it will be changed soon.

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Reference (23)

[1]	冯兆东，1990.美国陆地第四纪研究近年来的主要成果与问题，冰川冻土，12(3);251~258.
[2]	刘光秀、沈永平、王苏民，1994，若尔盖RH孔150Ka以来的植被历史及其气候记录，见:青截高原形成演化、环境变迁与生态系统研究学术论文年刊(1994)，科学出版社，北京:199~208.
[3]	李吉均等.1979.青截高原隆起的时代、幅度及形式探讨，中国科学，6,608~616,
[4]	李吉均、郑本兴等.1986，西截冰川，科学出版社，北京，251~276,
[5]	李吉均等.1991，青截高原第四纪冰川遗迹分布图(说明书)，科学出版社，北京，4~5.
[6]	吴锡浩等，1991,陕西蓝田黄土地层中的两次天文学地质事件记录，科学通报，36(23):1799~1802,
[7]	沈永平等，1989，西藏聂拉木冰破平台古土城的发生学及环境的初步研究，冰川冻土，11(3):269~278,
[8]	张平中等,1994，青藏高原东部若尔盖盆地RH孔沉积有机质的bt3C值和氮指数(H1)记录及其环境意义，见:青藏高原形成演化、环境变迁与生态系统研究学术论文年刊(1994),科学出版社，北京:209---217,
[9]	郑本兴等，1976，珠穆朗玛峰地区第四纪冰期探讨，见:珠穆朗玛峰地区科学考察报告(1966~1968)(第四纪地质)，科学出版社，北京,29~60.
[10]	郑本兴等，1990，青藏高原第四纪冰期年代研究的新进展，科学通报，35(7);533~537,
[11]	周尚哲等,1994,黄河源区更新世冰盖的初步研究，地理学报，99(1):64~72,
[12]	徐钦奇，1992，中更新世以来兽类地理分布的变化及其天文气候学的解释，古脊椎动物学报，30(3):233~291,
[13]	徐钦奇，1993,青藏高原更新世冰期的夭文学气候依据，冰川冻土，15(3);435~441,
[14]	黄万波等,1982，安徽和县猿人化石及有关问题的初步研究，古脊椎动物与古人类，20(3):248~255,
[15]	黄万波，1985,我国东部洞穴与猿人生息相关的一些间题，见:喀斯特地貌与洞穴，科学出版社，北京，109-112,
[16]	黄培华等，1991，北京狠人第一个头盖骨及其遗址堆积层的电子自旋共振测年研究，科学通报，36(2):133~136.
[17]	Kas6iwaya, K, Yamamoto, A and Fukuyana, K, 1988. Statistical analysis of grain size distribution in Pleistocene Sediments from Lake Biwa, Japan. Quaternary Research. 30: 12~18.
[18]	KukJa, G. 1977, Pleistocene land-sea correlation I; Europe. Earth-Science Reviews, 13(4):307-374.
[19]	Kukla, G. 1987, Loess stratigraphy in Central China. Quaternary Science Reviews. 6; 191~219.
[20]	Liu Tongsheng, et al, 1986, Stratigraphy and Palaeoenvironmental Changes in the loess of Central China. Quaternary Science Reviews. 5; 135~160.
[21]	Shen Yongping, et al, 1989, Correlation of the ice age and loess deposit sequence in the region of the Mt. Dali加，Gansu ,China. Journal of Lanzhou University. Special issue on international workshop on loess geomorphological processes and harzards. 109 ~119.
[22]	Williams. D. F. et al. 1988 Chrono logy of the Pleistocene Oxygen isotope record: 0~1. 88My. B. P.，Paleeogeogr.221-240.
[23]	Zheng Benxing, 1988. Quaternary glaciation of Mt. Qumolangma一Xixabengma region. Geo Journal. 17 (4 ):525~543.

Pollen Record and Its Palaeoclimatic Significance Between 800-150Ka. B. P. from RH-core in Zoige Basin in Qinghai-Xizang ( Tibet ) Plateau

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