| 陕西蓝田段家坡黄土剖面地球化学元素特征及古气候效应分析 |
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| 引用本文： | 牛彩香,雒昆利. 陕西蓝田段家坡黄土剖面地球化学元素特征及古气候效应分析[J]. 西北地质, 2010, 43(1): 66-74 |
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| 作者姓名： | 牛彩香 雒昆利 |
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| 作者单位： | 1. 中国科学院地理科与资源研究所,北京,100083;中国科学院研究生院,北京,100039
2. 中国科学院地理科与资源研究所,北京,100083 |
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| 基金项目： | 西部重点基金，国家高技术研究发展计划(863计划) |
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| 摘 要： | 地球化学元素在剖面上的变化能够反映当时沉积时期的古气候环境。通过对陕西蓝田段家坡剖面的24件样品进行系统分析,段家坡剖面中各元素含量存在一个明显的变化点。0.57~0.37 Ma的元素含量波动较大,0.37 Ma以来的各元素含量变化较小,反映出不同时期的古气候变化趋势不同。0.57~0.37 Ma的黄土剖面总体上反映了冷暖间或的古气候特征,0.37~0.13 Ma的黄土剖面总体上反映了温暖湿润的古气候环境,0.13 Ma以来至马兰黄土沉积结束时期(10ka BP)的气候变得较为干冷。这一变化规律与深海氧同位素、古植被、古气候的变化规律具有较好的一致性,并且符合米兰科维奇旋回的变化规律。
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| 关 键 词： | 陕西蓝田 段家坡黄土剖面 地球化学元素 古气候 |
Characteristics of Geochemical Element and Paleoclimate Effect -A Case Studying of Duanjiapo Section During Late Neogene and Quaternary,in Lantian,Shaanxi |
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| NIU Cai-xiang,LUO Kun-li. Characteristics of Geochemical Element and Paleoclimate Effect -A Case Studying of Duanjiapo Section During Late Neogene and Quaternary,in Lantian,Shaanxi[J]. Northwestern Geology, 2010, 43(1): 66-74 |
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| Authors: | NIU Cai-xiang LUO Kun-li |
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| Affiliation: | NIU Cai-xiang1,2,LUO Kun-li1 (1.Institute of Geographic Sciences and Natural Resources Research,Beijing 100083,China,2.Graduate School of Chinese Academy Sciences,Beijing 100039,China) |
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| Abstract: | The variation of geochemical element in section can reflect the paleoclimate circumstance in the course of sedimentary.Through systematically analyzing 30 pieces of samples collected from Duanjiapo section,we conclude that there is an obvious catastrophe point for every kinds of elements.Content of element has a great change from 0.57Ma to 0.37MaB.P,but keep unchanged around 0.37Ma.Paleoclimate have changed from the cold-warm fluctuation and total warm and moist to dry-cold climate from 0.57Ma to 0.37Ma B.P... |
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| Keywords: | Lantian Shaanxi Duanjiapo loess section geochemical element paleoclimate |
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