岷江叠溪古堰塞湖沉积物中孢粉特征

王小群; 王兰生

doi:10.3799/dqkx.2013.095

Volume 38 Issue 5

Sep. 2013

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WANG Xiao-qun, WANG Lan-sheng, 2013. The Pollen and Spore Characteristics of the Diexi Ancient Dammed Lake on the Upstream of Minjiang River. Earth Science, 38(5): 975-982. doi: 10.3799/dqkx.2013.095

Citation:

WANG Xiao-qun, WANG Lan-sheng, 2013. The Pollen and Spore Characteristics of the Diexi Ancient Dammed Lake on the Upstream of Minjiang River. Earth Science, 38(5): 975-982. doi: 10.3799/dqkx.2013.095

WANG Xiao-qun, WANG Lan-sheng, 2013. The Pollen and Spore Characteristics of the Diexi Ancient Dammed Lake on the Upstream of Minjiang River. Earth Science, 38(5): 975-982. doi: 10.3799/dqkx.2013.095

Citation:

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The Pollen and Spore Characteristics of the Diexi Ancient Dammed Lake on the Upstream of Minjiang River

doi: 10.3799/dqkx.2013.095

State Key Laboratory of Geohazard Prevention & Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China

Received Date: 2012-11-28
Publish Date: 2013-09-15

Abstract

Abstract

Many samplings, tests and analysis are carried out to study the lacustrine sediments which are more than 200 m thick inside the Diexi ancient dammed lake on Minjing river. The pollen and spore of the sediments and sedimentation time are tested by which the ancient dammed lake sedimentation time and climate-environment characteristics are obtained. It is found that bottom parts of the ancient dammed lake lacustrine sediments were formed 30 000 years ago, while the parts close to the top formed 15 000 years ago. The pollen and spore test results indicate that the sediment section of the ancient dammed lake can be classified into the following 9 climate-environment sections: (1) Cool and semi-moist, needle leave and broad leave mixed forest and grassland climate-environment; (2) cold and dry, needle leave forest and grass land climate-environment; (3) cool and semi-moist, needle leave and broad leave mixed open forest and grassland climate-environment; (4) warm and humid, needle leave and broad leave mixed forest grassland climate-environment; (5) cool and semi-dry, needle leave and broad leave mixed open forest and grassland climate-environment; (6) cool and semi-moist forest and grassland climate-environment; (7) cold and dry, open forest and grassland climate-environment. The evolution characteristics of the Palaeo-climate and Palaeo-environment of the transition area of east edge of Qinghai-Tibetan Plateau to Sichuan basin during time period between 30 000 to 15 000 years ago is described, which can provide information for the regional environment study.
- Minjiang river,
- Diexi,
- ancient dammed lake,
- sediments,
- pollen and spore,
- climate change,
- palaeo-climate and palaeo-environment

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References(36)

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The Pollen and Spore Characteristics of the Diexi Ancient Dammed Lake on the Upstream of Minjiang River

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