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| 沉积物颜色和粘土矿物对库车坳陷第三纪气候变化的指示 | |
| 引用本文： | 李双建,张然,王清晨.沉积物颜色和粘土矿物对库车坳陷第三纪气候变化的指示[J].沉积学报,2006,24(4):521-530. |
| 作者姓名： | 李双建 张然 王清晨 |
| 作者单位： | 1. 中国石油化工股份有限公司石油勘探开发研究院,北京,100083;中国科学院地质与地球物理研究所,北京,100029 2. Department of Geosciences, University of Houston,U.S.A 3. 中国科学院地质与地球物理研究所,北京,100029 |
| 摘 要： | 库车坳陷第三纪连续的碎屑沉积,记录了丰富的古环境与古气候变化的信息。在详细的磁性地层年代学基础上,对库车坳陷北部第三系沉积剖面进行了系统的沉积物颜色测定和粘土矿物分析。结果表明,库车坳陷第三纪沉积物颜色变化与全球第三纪温度的变化有一致的趋势,随着全球气温的降低,沉积物的颜色的红色指数降低。粘土矿物的组合和含量变化在13 M a出现了一个转折,在此之前,库车坳陷泥岩样品中的粘土矿物组合为伊利石和绿泥石,指示干旱的气候环境。在13 M a之后,库车坳陷的粘土矿物组合变为蒙脱石、高岭石、绿泥石和伊利石,指示干冷与温湿交替的气候环境,与亚洲内陆季风气候加强相对应。由此,可以认为库车坳陷第三纪13M a的气候变化与青藏高原的隆升密切相关。 |
| 关 键 词： | 沉积物颜色 粘土矿物 古气候 第三纪 库车坳陷 青藏高原 |
| 文章编号： | 1000-0550（2006）04-0521-10 |
| 收稿时间： | 2005-11-01 |
| 修稿时间： | 2005-11-012006-04-10 |
Implications of the Color of Sediments and Clay Minerals for Tertiary Climatic Changes of Kuqa Depression |
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| LI Shuang-jian,ZHANG Ran,WANG Qing-chen.Implications of the Color of Sediments and Clay Minerals for Tertiary Climatic Changes of Kuqa Depression[J].Acta Sedimentologica Sinica,2006,24(4):521-530. | |
| Authors: | LI Shuang-jian ZHANG Ran WANG Qing-chen |
| Abstract: | Rich paleo-environmental and paleo-climatic formation is recorded in Tertiary successive detrital deposition of Kuqa depression.Based on detail magnetstratigraphic chronology,the color of sediments and the clay minerals of Tertiary from Kuqa depression are tested systemically.The results illustrate that there has consistent alteration trends between the color of Tertiary sediments from Kuqa depression and Tertiary global temperature change.Along the falling of global temperature,the red index of sediments decreases.The assemblages and contents of clay minerals change dramatically at 13Ma.The assemblages of clay minerals before 13Ma are illite and chlorite,and are smectite,chlorite,illite and kaolinite after 13Ma,which indicate that the climate is arid before 13Ma and alternation between dry and cold climate and warm and wet climate after 13Ma.The climatic change is consistent with enhancement of Asian inland monsoon which shows that the Tertiary climatic change of Kuqa depression at 13Ma has intimate relation with the uplift of Tibetan plateau. |
| Keywords: | color of sediments clay minerals climate Tertiary Kuqa depression Tibetan plateau |
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