| The Paleoclimatic Variation Records of Carbonate and Iron Oxides in the Weinan Loess Section |
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| 作者姓名： | 刁桂仪 文启忠 |
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| 作者单位： | [1]GuangzhouInstituteofGeochemistry,ChineseAcademyofSciences,Wushan,Guangzhou510640 [2]GuangzhouInstituteof,ChineseAcademyofSciences,Wushan,Guangzhou510640 |
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| 摘 要： | The contents and distributions of CaCO3,Fe2O3.FeO and free Fe2O3 in the Weinan loess section of Shaanxi Province of China were investigated through dense sampling.The results show that the contents of CaCO3 and the ration of Fe2O3/FeO may be chosen as proxy in dices for the precipitation and temperature changes in the formation time of the strata,respectively.According to these geochemical indices,six stages of plaeoclimate evolution are proposed in this region since 142 ka B.P.,and secondary climate changes are discussed as well based on the curves of geochemical indices.
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| 关 键 词： | 古气候 碳酸盐 黄土 铁氧化物 |
The paleoclimatic variation records of carbonate and iron oxides in the Weinan loess section |
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| Diao Guiyi,Wen Qizhong.The Paleoclimatic Variation Records of Carbonate and Iron Oxides in the Weinan Loess Section[J].Chinese Journal of Geochemistry,1997,16(1):62-68. |
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| Authors: | Diao Guiyi Wen Qizhong |
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| Institution: | (1) Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 510640 Wushan Guangzhou, China |
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| Abstract: | The contents and distributions of CaCO3, Fe2O3, FeO and free Fe2O3 in the Weinan loess section of Shaanxi Province of China were investigated through dense sampling. The results show that
the contents of CaCO3 and the ratio of Fe2O3/FeO may be chosen as proxy indices for the precipitation and temperature changes in the formation time of the strata, respectively.
According to these geochemical indices, six stages of paleoclimate evolution are proposed in this region since 142 ka B. P.,
and secondary climate changes are discussed as well based on the curves of geochemical indices.
This project was financially supported by the National Natural Science Foundation of China (49291100). |
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| Keywords: | loess carbonate iron oxide paleoclimate |
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