| 最近13万年以来洛川黄土剖面中Porg/Pinorg分布及其古气候指示意义 |
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| 引用本文： | 饶文波,罗泰义,高振敏,李晓彪.最近13万年以来洛川黄土剖面中Porg/Pinorg分布及其古气候指示意义[J].地球化学,2003,32(4):343-348. |
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| 作者姓名： | 饶文波 罗泰义 高振敏 李晓彪 |
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| 作者单位： | 1. 中国科学院,地球化学研究所,矿床地球化学重点实验室,贵州,贵阳,550002;中国科学院,研究生院,北京,100039
2. 中国科学院,地球化学研究所,矿床地球化学重点实验室,贵州,贵阳,550002 |
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| 基金项目： | 国家自然科学基金，49902024， |
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| 摘 要： | 对末次间冰期以来洛川黄土进行了有机磷／无机磷(Porg／Pinorg)比值测量。结果表明，黄土中Porg／Pinorg比值的分布主要受降水量和温度的影响，是有机磷和无机磷在不同时期随气候变化相互转化的结果。此指标的变化与黄土—古土壤的变化大致相关，与洛川黄土磁化率曲线相一致，与深海氧同位素可进行很好的对比。此比值与夏季风强弱程度乃至与全球气候变化有密切的联系。Porg／Pinorg比值可作为一种反映古气候环境变迁的新指标。
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| 关 键 词： | 末次间冰期 洛川 黄土 有机磷 无机磷 比值 测量 磁化 古气候 |
| 文章编号： | 0379-1726(2003)04-0343-06 |
Porg/Pinorg fluctuation in the Luochuan loess section during the last 130 ka and its paleoclimatic significance |
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| RAO Wen bo,LUO Tai yi,GAO Zhen min,LI Xiao biao.Porg/Pinorg fluctuation in the Luochuan loess section during the last 130 ka and its paleoclimatic significance[J].Geochimica,2003,32(4):343-348. |
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| Authors: | RAO Wen bo LUO Tai yi GAO Zhen min LI Xiao biao |
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| Institution: | RAO Wen bo1,2,LUO Tai yi1,GAO Zhen min1,LI Xiao biao1,2 |
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| Abstract: | Porg/Pinorg ratio in the Luochuan loess section during the last 130 ka is measured, which is affected by temperature and precipitation, resulting from conversion of both Porg and Pinorg each other with variation of paleoclimate during different geological periods. Porg/Pinorg ratio variation correlates with loess paleosol sequence. Porg/Pinorg ratio is consistent with magnetic susceptibility in the Luochuan loess section. Variation of Porg/Pinorg ratio has an obviously close relation with intensity of summer monsoon, and can match well the marine oxygen isotope records. Therefore, a new proxy recording paleoclimatic variation, P_(org)/P_(inorg) ratio, is established. |
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| Keywords: | P_(org)/P_(inorg) paleoclimate 130 ka loess Luochuan |
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