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| 青藏高原东部全新世泥炭灰分的粒度特征及其古气候意义 | |
| 引用本文： | 于学峰,周卫健,刘晓清,郑艳红,宋少华.青藏高原东部全新世泥炭灰分的粒度特征及其古气候意义[J].沉积学报,2006,24(6):864-869. |
| 作者姓名： | 于学峰 周卫健 刘晓清 郑艳红 宋少华 |
| 作者单位： | 1. 中国科学院地球环境研究所,黄土与第四纪地质国家重点实验室,西安,710075 2. 陕西师范大学旅游与环境学院,西安,710062 3. 西北大学地质学系,西安,710069 |
| 基金项目： | 国家自然科学基金 , 国家重点实验室基金 |
| 摘 要： | 通过将红原泥炭地泥炭灰分的粒度特征与典型风成沉积物、湖泊沉积物、河流沉积物的粒度特征进行比较,发现泥炭灰分的粒度特征与典型风成沉积（如黄土、古土壤）相似,而与湖泊沉积以及河流沉积有较大差异。环境判别参数也显示泥炭灰分来源为风成的。据此,作者认为该地区泥炭沉积中的灰分物质是风成堆积,进而提出该地区泥炭灰分含量可以指示冬季风强度的变化。 |
| 关 键 词： | 泥炭 粒度 灰分 古气候 冬季风 |
| 文章编号： | 1000-0550（2006）06-0864-06 |
| 收稿时间： | 2006-02-12 |
| 修稿时间： | 2006-04-27 |
Grain Size Characteristics of the Holocene Peat Sediment in Eastern Tibetan Plateau and Its Paleoclimatic Significance |
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| YU Xue-feng,ZHOU Wei-jian,LIU Xiao-qing,ZHENG Yan-hong,SONG Shao-hua.Grain Size Characteristics of the Holocene Peat Sediment in Eastern Tibetan Plateau and Its Paleoclimatic Significance[J].Acta Sedimentologica Sinica,2006,24(6):864-869. | |
| Authors: | YU Xue-feng ZHOU Wei-jian LIU Xiao-qing ZHENG Yan-hong SONG Shao-hua |
| Abstract: | Based on the comparison of the grain size characteristics of the Holocene peat sediment in eastern Tibetan Plateau with that of typical eolian sediments, fluvial sediments, and lacustrine sediments, the authors find that the grain size characteristics of peat sediment in the study site closely resemble that of eolian sediments (e.g. loess and paleosol), but differ from that of fluvial sediments, and lacustrine sediments, no matter in the distribution curves or the cumulative curves. The discriminant parameter for the sedimentological environment determining, calculated by the statistical parameters of grain size, also shows the same result. So, the ash content in peat sediment can be used as a proxy to indicate the winter monsoon intensity, higher ash content shows stronger winter monsoon, and the vice versa. |
| Keywords: | peat grain size ash content plaeoclimate winter monsoon |
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