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ORGANIC GEOCHEMISTRY MARKERS OF CLIMATIC EVOLUTION IN LOESS REGION OF CHINA

贾蓉芬 赵林 刘友梅 文启忠

贾蓉芬, 赵林, 刘友梅, 文启忠. ORGANIC GEOCHEMISTRY MARKERS OF CLIMATIC EVOLUTION IN LOESS REGION OF CHINA[J]. 中国地理科学, 1997, 7(2): 130-139.
引用本文: 贾蓉芬, 赵林, 刘友梅, 文启忠. ORGANIC GEOCHEMISTRY MARKERS OF CLIMATIC EVOLUTION IN LOESS REGION OF CHINA[J]. 中国地理科学, 1997, 7(2): 130-139.
Jia Rongfen, Zhao Lin, Liu Youmei, wen Qizhong. ORGANIC GEOCHEMISTRY MARKERS OF CLIMATIC EVOLUTION IN LOESS REGION OF CHINA[J]. Chinese Geographical Science, 1997, 7(2): 130-139.
Citation: Jia Rongfen, Zhao Lin, Liu Youmei, wen Qizhong. ORGANIC GEOCHEMISTRY MARKERS OF CLIMATIC EVOLUTION IN LOESS REGION OF CHINA[J]. Chinese Geographical Science, 1997, 7(2): 130-139.

ORGANIC GEOCHEMISTRY MARKERS OF CLIMATIC EVOLUTION IN LOESS REGION OF CHINA

ORGANIC GEOCHEMISTRY MARKERS OF CLIMATIC EVOLUTION IN LOESS REGION OF CHINA

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出版历程
  • 收稿日期:  1996-12-16
  • 刊出日期:  1997-06-20

ORGANIC GEOCHEMISTRY MARKERS OF CLIMATIC EVOLUTION IN LOESS REGION OF CHINA

摘要: Two hundred and thirty-five samples collected from Weinan loess section (L2-S0)have analyzed by TOC (total organic carbon) and pyrolysis hydrocarbons. The curve of TOC with depth has ho set up and compared well with other climatic markers. The main periods of TOC variation of the last 0. 14 Ma are 67.08 ka and 18.29 ka, which is near with the periods of the variation of sunshine, showing that the TOC variation may be controlled by the variation of 65°N sunshine. The distribution of pyrolysis hydrocarbon and its parameters shows that there are two kinds of hydrocarbon associated with climatic change. One is called hydrocarbon pyrolysted directly from organism (pHC2-1) which is in the range of Tmax350℃-500℃, and associated with atmospheric water. The other is called carbonate inclusion inclusion (pHC2-2) which is in the range of Tmax 500℃-600℃ and formed by evaporation and associated with dry climate. The formula calculating humidity has been deduced Og = pHC2-1/(pHC2-1 + pHC2-2). The range of humidity of the section is 47%-77% and the reducing is S1-3, S1-2, S0, S1-1, S1-4, S1-2, L1-1, L1-3, and L1-5. And the trend of the humidity is still increasing today.

English Abstract

贾蓉芬, 赵林, 刘友梅, 文启忠. ORGANIC GEOCHEMISTRY MARKERS OF CLIMATIC EVOLUTION IN LOESS REGION OF CHINA[J]. 中国地理科学, 1997, 7(2): 130-139.
引用本文: 贾蓉芬, 赵林, 刘友梅, 文启忠. ORGANIC GEOCHEMISTRY MARKERS OF CLIMATIC EVOLUTION IN LOESS REGION OF CHINA[J]. 中国地理科学, 1997, 7(2): 130-139.
Jia Rongfen, Zhao Lin, Liu Youmei, wen Qizhong. ORGANIC GEOCHEMISTRY MARKERS OF CLIMATIC EVOLUTION IN LOESS REGION OF CHINA[J]. Chinese Geographical Science, 1997, 7(2): 130-139.
Citation: Jia Rongfen, Zhao Lin, Liu Youmei, wen Qizhong. ORGANIC GEOCHEMISTRY MARKERS OF CLIMATIC EVOLUTION IN LOESS REGION OF CHINA[J]. Chinese Geographical Science, 1997, 7(2): 130-139.

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