The Color of Lacustr ine Sediments Recorded Climatic Changes from 13 to 4.5Myr in Linxia Basin

SONG Chun-hui; BAI Jin-feng; ZHAO Yan-de; JING Hong-bo; MENG Qing-quan

It is an important content that recovering paleoclimatic environment change by using high-resolution substitute p roxy. The paper established a high-resolution sequence of the color records of the lacustrine sediments from 13 to 4.5Ma through the measurement of continuous 2060 samples collected in L inxia basin at an interval of 10cm. Based on the analyses of sediment colorwith the sediment composition, and compare the color recordswith the content variation curves of chlorineion, aeolian quartz, calcium carbonate and pollen in the L inxia basin as well as aeolian silt from ODP885 /886 drill in North Pacific Ocean, the relationship between the color records of lacustrine sediments and climate changes are discussed, and the two climatic shifts about 8 and 6.2Myr are revealed.

1. Key Laboratory of Western China's Environmental Systems (Ministry of Education of China) & College of Resources and Environment, Lanzhou University, Lanzhou 730000;

2. Taiyuan University of Technology, Taiyuan 030024

Received Date: 2004-07-09

Rev Recd Date: 2005-03-07

Publish Date: 2005-09-10

Key words:

the color records of lacustrine sediments /
climatic change /
Neogene /

Abstract: It is an important content that recovering paleoclimatic environment change by using high-resolution substitute p roxy. The paper established a high-resolution sequence of the color records of the lacustrine sediments from 13 to 4.5Ma through the measurement of continuous 2060 samples collected in L inxia basin at an interval of 10cm. Based on the analyses of sediment colorwith the sediment composition, and compare the color recordswith the content variation curves of chlorineion, aeolian quartz, calcium carbonate and pollen in the L inxia basin as well as aeolian silt from ODP885 /886 drill in North Pacific Ocean, the relationship between the color records of lacustrine sediments and climate changes are discussed, and the two climatic shifts about 8 and 6.2Myr are revealed.

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The Color of Lacustr ine Sediments Recorded Climatic Changes from 13 to 4.5Myr in Linxia Basin

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