| 新疆天山地区不同海拔黄土记录的末次冰消期以来的环境演变 |
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| 引用本文： | 范义姣, 田伟东, 杨军怀, 王树源, 陈梓炫, 马亚鹏, 陆浩, 高福元, 贾佳, 夏敦胜. 新疆天山地区不同海拔黄土记录的末次冰消期以来的环境演变[J]. 第四纪研究, 2021, 41(5): 1244-1253. doi: 10.11928/j.issn.1001-7410.2021.05.02 |
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| 作者姓名： | 范义姣 田伟东 杨军怀 王树源 陈梓炫 马亚鹏 陆浩 高福元 贾佳 夏敦胜 |
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| 作者单位： | 1. 兰州大学资源环境学院, 西部环境教育部重点实验室, 甘肃 兰州 730000; 2. 兰州城市学院地理与环境工程学院, 甘肃 兰州 730070; 3. 浙江师范大学地理与环境科学学院, 浙江 金华 321004 |
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| 基金项目： | 国家自然科学基金项目(批准号: 41877444)和兰州大学西部环境教育部重点实验室开放基金项目及兰州大学中央高校基本科研业务费专项资金(批准号: lzujbky-2019-kb01和lzujbky-2020-kb01)共同资助 |
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| 摘 要： | 新疆天山地区是中亚干旱区的重要组成部分，在研究全球环境变化和区域气候方面具有重要意义。选取天山地区不同海拔的3个黄土剖面，结合磁学参数、粒度、碳酸盐、总有机碳含量，探讨该区域地形对粉尘堆积和气候环境的影响以及末次冰消期以来的环境演变。结果表明：1）在天山北麓，磁化率、粒度和总有机碳含量变化指示海拔相对较高的黄土沉积对湿润气候环境更加敏感；2）伊犁盆地由于相对湿润的气候环境，其黄土沉积磁化率高于天山北麓，体现了地形因素的重要作用；3）新疆天山地区海拔较高的黄土沉积响应轨道和亚轨道尺度气候变化，各指标均指示末次冰消期以来气候环境由干冷向暖湿转变；在亚轨道尺度上尤其是中晚全新世，湿度逐渐增加。
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| 关 键 词： | 新疆黄土 末次冰消期 全新世 磁化率 环境演变 |
| 收稿时间： | 2020-11-26 |
| 修稿时间： | 2021-03-20 |
Environmental changes since last deglaciation recorded in loess at different altitude in Tianshan Mountains,Xinjiang |
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| FAN Yijiao, TIAN Weidong, YANG Junhuai, WANG Shuyuan, CHEN Zixuan, MA Yapeng, LU Hao, GAO Fuyuan, JIA Jia, XIA Dunsheng. Environmental changes since last deglaciation recorded in loess at different altitude in Tianshan Mountains, Xinjiang[J]. Quaternary Sciences, 2021, 41(5): 1244-1253. doi: 10.11928/j.issn.1001-7410.2021.05.02 |
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| Authors: | FAN Yijiao TIAN Weidong YANG Junhuai WANG Shuyuan CHEN Zixuan MA Yapeng LU Hao GAO Fuyuan JIA Jia XIA Dunsheng |
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| Affiliation: | 1. Key Laboratory of Western China's Environmental Systems, Ministry of Education, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, Gansu; 2. College of Geography and Environmental Engineering, Lanzhou City University, Lanzhou 730070, Gansu; 3. College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, Zhejiang |
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| Abstract: | Located in the eastern part of arid Central Asia, Tianshan regions, Xinjiang have played great significance on global and regional environmental change. In this study, we selected three loess sections at LJW10(43°58'29″N, 85°20'10″E; 1462 m a.s.l.), BYH10(44°02'26.7″N, 87°48'54.0″E; 622 m a.s.l.) and KS16(43°25'56.4″N, 83°56'35.5″E; 1314 m a.s.l.), which located at northern slope of Tianshan Mountains and Yili Basin, respectively. These sections all deposited at least from last deglaciation. Climatic proxies including magnetic parameters(χlf, χfd), particle size(< 10 μm grain size fraction, Md), carbonate content(CaCO3) and total organic carbon(TOC) are compared within the three loess sections at different altitudes. In addition, we collected and sorted out the published χlf spanning the whole Holocene, in northern slope of Tianshan Mountains and Yili Basin at different altitudes. |
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| Keywords: | loess in Xinjiang last deglaciation Holocene magnetic susceptibility environmental change |
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