| 天山乌鲁木齐河流域冰川地貌与冰期研究的回顾与展望 |
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| 引用本文： | 赵井东,施雅风,李忠勤.天山乌鲁木齐河流域冰川地貌与冰期研究的回顾与展望[J].冰川冻土,2011,33(1):118-125. |
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| 作者姓名： | 赵井东 施雅风 李忠勤 |
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| 作者单位： | 中国科学院,寒区旱区环境与工程研究所,冰冻圈科学国家重点实验室,甘肃,兰州,730000;中国科学院,寒区旱区环境与工程研究所,冰冻圈科学国家重点实验室,甘肃,兰州,730000;中国科学院南京地理与湖泊研究所,江苏,南京,210008 |
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| 基金项目： | 中国科学院知识创新工程重要方向项目(KZCX2-EW-QN304KZCX2-YW-GJ04); 中国科学院自主课题“中国第四纪冰川与环境变化研究”资助; 国家自然科学基金项目(41071010); 科技部科技基础性工作专项项目(2006FY110200) |
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| 摘 要： | 乌鲁木齐河源于天山北列喀拉乌成山的北坡,区内保存着形态多样、较为清晰的第四纪冰川侵蚀与沉积地形.经过老中青数代人的考察研究,取得如下研究成果:1)查清了河源区冰川地形的分布与特征,运用冰川沉积学与地貌地层学原理对乌鲁木齐河出山口处的扇形地进行了冰川与非冰川成因的鉴别;2)基于地衣法、常规14 C与AMS14 C、TL、ESR、CRN(10Be)等多种定年方法的测年结果,并结合地貌地层学原理,建立了乌鲁木齐河流域小冰期、新冰期、末次冰期(MIS 2～4)、MIS 6与MIS12较完整的冰川演化序列,为我国第四纪冰川研究树立了一个典型范例.展望未来,乌鲁木齐河源区的冰川地貌演化模拟与古环境重建等需作进一步研究,喀拉乌成山南坡的冰川地形有待进行综合定年;若以乌鲁木齐河源流域冰期序列为参照,冰川发育与天山的构造抬升以及东、中与西段天山冰川发育是否具有一致性,天山地区是否保存有更老冰碛等科学问题尚待深入探讨.
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| 关 键 词： | 第四纪冰川 冰川地貌 海洋氧同位素阶段(MIS) 乌鲁小齐河 天山 |
Glacial Geomorphology and Glaciations at the Headwaters of the (U)rümqi River,Tianshan Mountains,China:Review and Prospect |
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| ZHAO Jing-dong,SHI Ya-feng,LI Zhong-qin.Glacial Geomorphology and Glaciations at the Headwaters of the (U)rümqi River,Tianshan Mountains,China:Review and Prospect[J].Journal of Glaciology and Geocryology,2011,33(1):118-125. |
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| Authors: | ZHAO Jing-dong SHI Ya-feng LI Zhong-qin |
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| Institution: | ZHAO Jing-dong1,SHI Ya-feng1,2,LI Zhong-qin1(1.State Key laboratory of Cryospheric Sciences,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou Gansu 730000,China,2.Nanjing Institute of Geography & Limnology,Nanjing Jiangsu 210008,China) |
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| Abstract: | The rümqi River originates from the northern slopes of the Kelawucheng Mountains,northern range of the eastern segment of the Tianshan Mountains,China.Glacial erosional and depositional landforms were well-preserved at the headwaters of the rümqi River.These landforms contain considerable information about the changes of the ancient glaciers and indicate that there are multiple Quaternary glaciations in this drainage.With the hard working by many scholars in the past five decades,several conclusions have been drawn: 1) Based on the principle of glaciology and sedimentology,geomorphology and distribution and characteristics of the Quaternary glacial landforms and sediments have been investigated,the glacial and non-glacial sediments have been studied.2) Based on the results of dating,such as traditional 14C,accelerator mass spectrometry 14C,lichenometry,thermoluminescence,electron spin resonance,cosmogenic radionuclide(10Be),and considering the principle of geomorphology and stratigraphy,the Little Ice Age,Neoglaciation,Last Glaciation(MIS 2～4),and glaciations corresponding to MIS 6 and MIS 12 have been confirmed.A typical case of the Quaternary glaciations in China has been established.Reviewing the past and prospecting the future,it is suggested that more studies on the paleoenvironment reconstruction and glacial landforms modeling should be done.The glacial landforms on the southern slopes of the Kelawucheng Mountains should be determined synthetically.Referring the Quaternary glacial revolution in this drainage,the relationship between the glacier development and the tectonic uplift of the Tianshan Mountains should be further study.In addition,it should be emphasized in the future study that the glaciers developed in the eastern,middle and western segments of Tianshan Mountains in synchronicity or not and were there the older glaciations in Tianshan Mountains? |
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| Keywords: | Quaternary glaciations glacial geomorphology marine oxygen isotope stage(MIS) rümqi River Tianshan Mountains |
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