A Study on Peat Deposition Chronology of Holocene of Zorge Plateau in the Northeast Oinghai-tibetan Plateau

SUN Guang you; LUO Xin zheng; R.E.Turner

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Article Navigation > Acta Sedimentologica Sinica > 2001 > 19(2): 177-181,206

SUN Guang you, LUO Xin zheng, R.E.Turner. A Study on Peat Deposition Chronology of Holocene of Zorge Plateau in the Northeast Oinghai-tibetan Plateau[J]. Acta Sedimentologica Sinica, 2001, 19(2): 177-181,206.

Citation:

SUN Guang you, LUO Xin zheng, R.E.Turner. A Study on Peat Deposition Chronology of Holocene of Zorge Plateau in the Northeast Oinghai-tibetan Plateau[J]. Acta Sedimentologica Sinica, 2001, 19(2): 177-181,206.

A Study on Peat Deposition Chronology of Holocene of Zorge Plateau in the Northeast Oinghai-tibetan Plateau

1 Changchun Institute of Geography,Chinese Academy of Sciences,Changchun,China 130021;
2 Department of Oceanography and Coastal Sciences Louisiana State University,Baton Rouge,USA LA70810

Received Date: 2000-05-22
Rev Recd Date: 2001-04-15

Abstract

Qinghai-Tibet Plateau is a unigue and speciai region on environmental change,the famous wetland of Zorge Plateau is in northeast Oinghai-Tlbetan Piateau and covers 4 605. 28 sguare kilometers. In the wetland,peat was wideiy piled in the wide valleys and abundant information about environmental change was contained in it,which is very valuabie for investigating the globally environmental change. Erecting a correct time reference frame of Holocene is the precondition to make use of great environmental information. Existed time reference frame of Holocene was established based on the ¹⁴C data,and it is iimited and has Shortcomings.So,it is necessary to look for a method that is more reliable and can emend result of ¹⁴C age.Authors discovered peat varve structure in peat layers of Zorge Piateau wetiand,which couid be used as a new method combinig ¹⁴C for determining Holocene age.And it is posible that the resolution come up to standard of year. The paper,which is based on age dates that were made just from mine Ⅱ of Hongyuan Peat Site,found an age tabie of Holocene peat deposition. The tabie is a more complete system and has higher believabie and higher resolution. In addition,the age dates of some important peatland in Zorge Plateau except the region of Hongyaun were published systematically,and then the age seguence of peat in Zorge Plateau was presented in the paper. These results indicated that the Latest mire mud of the Zorge Plateau formed in above 12 000 yrBP and the deposition of peat started in 11 500 yrBP. It was alse closed of a vlolently falling temperature,Younge Dryas ,appeared in 11 500 ~ 12111yrBP. The Holocene megathermal was formed from 9 500 yrBP to 2 000 yrBP,which is a period of faster peat deposition. Before 9 500 yrBP and after 2 000 yrBP of Holocene,peat deposition siowed. The slowest period of peat deposition has appeared in modern times. Under the effect of difference of environment,peat age of deposition has big difference in the plateau.Generally,the high mountainous regions are later than the wide valley,and the latter was dominant in middle Holocene.
- Qinghai-Tibet Plateau,
- Zorge Plateau,
- Holocene,
- peat deposition chronology

References

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12 汪佩芳，夏玉梅，王曼华. 西藏南部全新世泥炭孢粉组合及自然环境演化的探讨[J]. 地理科学，1981，1（2）：144 ~ 152

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A Study on Peat Deposition Chronology of Holocene of Zorge Plateau in the Northeast Oinghai-tibetan Plateau

1 Changchun Institute of Geography,Chinese Academy of Sciences,Changchun,China 130021;

2 Department of Oceanography and Coastal Sciences Louisiana State University,Baton Rouge,USA LA70810

Received Date: 2000-05-22

Rev Recd Date: 2001-04-15

Key words:

Abstract: Qinghai-Tibet Plateau is a unigue and speciai region on environmental change,the famous wetland of Zorge Plateau is in northeast Oinghai-Tlbetan Piateau and covers 4 605. 28 sguare kilometers. In the wetland,peat was wideiy piled in the wide valleys and abundant information about environmental change was contained in it,which is very valuabie for investigating the globally environmental change. Erecting a correct time reference frame of Holocene is the precondition to make use of great environmental information. Existed time reference frame of Holocene was established based on the ¹⁴C data,and it is iimited and has Shortcomings.So,it is necessary to look for a method that is more reliable and can emend result of ¹⁴C age.Authors discovered peat varve structure in peat layers of Zorge Piateau wetiand,which couid be used as a new method combinig ¹⁴C for determining Holocene age.And it is posible that the resolution come up to standard of year. The paper,which is based on age dates that were made just from mine Ⅱ of Hongyuan Peat Site,found an age tabie of Holocene peat deposition. The tabie is a more complete system and has higher believabie and higher resolution. In addition,the age dates of some important peatland in Zorge Plateau except the region of Hongyaun were published systematically,and then the age seguence of peat in Zorge Plateau was presented in the paper. These results indicated that the Latest mire mud of the Zorge Plateau formed in above 12 000 yrBP and the deposition of peat started in 11 500 yrBP. It was alse closed of a vlolently falling temperature,Younge Dryas ,appeared in 11 500 ~ 12111yrBP. The Holocene megathermal was formed from 9 500 yrBP to 2 000 yrBP,which is a period of faster peat deposition. Before 9 500 yrBP and after 2 000 yrBP of Holocene,peat deposition siowed. The slowest period of peat deposition has appeared in modern times. Under the effect of difference of environment,peat age of deposition has big difference in the plateau.Generally,the high mountainous regions are later than the wide valley,and the latter was dominant in middle Holocene.

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A Study on Peat Deposition Chronology of Holocene of Zorge Plateau in the Northeast Oinghai-tibetan Plateau

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