COMPOSITIONS OF δ<sup>18</sup>O AND δ<sup>13</sup>C IN VARIOUS CARBONATES OF CORE RM IN THE ZOIGê BASIN AND CLIMATIC SIGNIFICANCE

吴敬禄

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COMPOSITIONS OF δ¹⁸O AND δ¹³C IN VARIOUS CARBONATES OF CORE RM IN THE ZOIGê BASIN AND CLIMATIC SIGNIFICANCE

吴敬禄

Nanjing Institute of Geography and Limnology, the Chinese Academy of Sciences, Nanjing 210008, P. R. China

COMPOSITIONS OF δ¹⁸O AND δ¹³C IN VARIOUS CARBONATES OF CORE RM IN THE ZOIGê BASIN AND CLIMATIC SIGNIFICANCE

Wu Jinglu

Nanjing Institute of Geography and Limnology, the Chinese Academy of Sciences, Nanjing 210008, P. R. China

摘要: The hole RM, the deepest one fully obtained core in the Qinghai-Xizang Plateau, situated in the depositional center of the Zoire Basin (33°57′N; 102°21′E) in the northeastern QinghaiXizang Plateau with a depth of 310.46 m. From ¹⁴C dating and Paleomagnetic stratigraphic study,the core RM can date back to 900 ha B.P.. In this paper we analyzed the compositions of δ¹⁸O and δ¹³C in various carbonates can date (snail, obstrode, chemical Cabonate) in core RM and discussed preferably the paleoclimatic record by the proxies of δ¹⁸O and δ¹³C Of chemical carbonate (authicalbonate) from core RM in the past 140 ka. The results showed that the values of δ¹⁸O in various carbonates are generally identical, and the values of δ¹³C in it are inconsistent, while there exist better relativity. The studies also demonstrated that there was a negative correlation between δ¹⁸O and δ¹³C of authicabonate in core RM in the past 140 ka, showing that the changes of δ¹⁸O values were mainly relative to the water temperature. According to above, the climatic evolutionary sequence were rebuilt in the past 140 ka in the region.
- Zoigê Basin /
- authicarbonate /
- stable isotope /
- paleoclimate
Abstract: The hole RM, the deepest one fully obtained core in the Qinghai-Xizang Plateau, situated in the depositional center of the Zoire Basin (33°57′N; 102°21′E) in the northeastern QinghaiXizang Plateau with a depth of 310.46 m. From ¹⁴C dating and Paleomagnetic stratigraphic study,the core RM can date back to 900 ha B.P.. In this paper we analyzed the compositions of δ¹⁸O and δ¹³C in various carbonates can date (snail, obstrode, chemical Cabonate) in core RM and discussed preferably the paleoclimatic record by the proxies of δ¹⁸O and δ¹³C Of chemical carbonate (authicalbonate) from core RM in the past 140 ka. The results showed that the values of δ¹⁸O in various carbonates are generally identical, and the values of δ¹³C in it are inconsistent, while there exist better relativity. The studies also demonstrated that there was a negative correlation between δ¹⁸O and δ¹³C of authicabonate in core RM in the past 140 ka, showing that the changes of δ¹⁸O values were mainly relative to the water temperature. According to above, the climatic evolutionary sequence were rebuilt in the past 140 ka in the region.
- Zoigê Basin /
- authicarbonate /
- stable isotope /
- paleoclimate

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COMPOSITIONS OF δ¹⁸O AND δ¹³C IN VARIOUS CARBONATES OF CORE RM IN THE ZOIGê BASIN AND CLIMATIC SIGNIFICANCE

Nanjing Institute of Geography and Limnology, the Chinese Academy of Sciences, Nanjing 210008, P. R. China

刊出日期: 1997-09-20

关键词:

摘要: The hole RM, the deepest one fully obtained core in the Qinghai-Xizang Plateau, situated in the depositional center of the Zoire Basin (33°57′N; 102°21′E) in the northeastern QinghaiXizang Plateau with a depth of 310.46 m. From ¹⁴C dating and Paleomagnetic stratigraphic study,the core RM can date back to 900 ha B.P.. In this paper we analyzed the compositions of δ¹⁸O and δ¹³C in various carbonates can date (snail, obstrode, chemical Cabonate) in core RM and discussed preferably the paleoclimatic record by the proxies of δ¹⁸O and δ¹³C Of chemical carbonate (authicalbonate) from core RM in the past 140 ka. The results showed that the values of δ¹⁸O in various carbonates are generally identical, and the values of δ¹³C in it are inconsistent, while there exist better relativity. The studies also demonstrated that there was a negative correlation between δ¹⁸O and δ¹³C of authicabonate in core RM in the past 140 ka, showing that the changes of δ¹⁸O values were mainly relative to the water temperature. According to above, the climatic evolutionary sequence were rebuilt in the past 140 ka in the region.

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COMPOSITIONS OF δ¹⁸O AND δ¹³C IN VARIOUS CARBONATES OF CORE RM IN THE ZOIGê BASIN AND CLIMATIC SIGNIFICANCE

COMPOSITIONS OF δ¹⁸O AND δ¹³C IN VARIOUS CARBONATES OF CORE RM IN THE ZOIGê BASIN AND CLIMATIC SIGNIFICANCE

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COMPOSITIONS OF δ¹⁸O AND δ¹³C IN VARIOUS CARBONATES OF CORE RM IN THE ZOIGê BASIN AND CLIMATIC SIGNIFICANCE

Nanjing Institute of Geography and Limnology, the Chinese Academy of Sciences, Nanjing 210008, P. R. China

English Abstract

COMPOSITIONS OF δ¹⁸O AND δ¹³C IN VARIOUS CARBONATES OF CORE RM IN THE ZOIGê BASIN AND CLIMATIC SIGNIFICANCE

Nanjing Institute of Geography and Limnology, the Chinese Academy of Sciences, Nanjing 210008, P. R. China

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COMPOSITIONS OF δ18O AND δ13C IN VARIOUS CARBONATES OF CORE RM IN THE ZOIGê BASIN AND CLIMATIC SIGNIFICANCE

COMPOSITIONS OF δ18O AND δ13C IN VARIOUS CARBONATES OF CORE RM IN THE ZOIGê BASIN AND CLIMATIC SIGNIFICANCE

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COMPOSITIONS OF δ18O AND δ13C IN VARIOUS CARBONATES OF CORE RM IN THE ZOIGê BASIN AND CLIMATIC SIGNIFICANCE

Nanjing Institute of Geography and Limnology, the Chinese Academy of Sciences, Nanjing 210008, P. R. China

English Abstract

COMPOSITIONS OF δ18O AND δ13C IN VARIOUS CARBONATES OF CORE RM IN THE ZOIGê BASIN AND CLIMATIC SIGNIFICANCE

Nanjing Institute of Geography and Limnology, the Chinese Academy of Sciences, Nanjing 210008, P. R. China

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目录

COMPOSITIONS OF δ¹⁸O AND δ¹³C IN VARIOUS CARBONATES OF CORE RM IN THE ZOIGê BASIN AND CLIMATIC SIGNIFICANCE

COMPOSITIONS OF δ¹⁸O AND δ¹³C IN VARIOUS CARBONATES OF CORE RM IN THE ZOIGê BASIN AND CLIMATIC SIGNIFICANCE

COMPOSITIONS OF δ¹⁸O AND δ¹³C IN VARIOUS CARBONATES OF CORE RM IN THE ZOIGê BASIN AND CLIMATIC SIGNIFICANCE

COMPOSITIONS OF δ¹⁸O AND δ¹³C IN VARIOUS CARBONATES OF CORE RM IN THE ZOIGê BASIN AND CLIMATIC SIGNIFICANCE