| 新疆河谷阶地的年代 |
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| 引用本文： | 柏美祥.新疆河谷阶地的年代[J].内陆地震,1998,12(1):13-19. |
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| 作者姓名： | 柏美祥 |
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| 作者单位： | 新疆维吾尔自治区地震局!乌鲁木齐830011 |
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| 摘 要： | 对新疆阿尔泰山，西准噶尔山地，天山南北及昆仑山２６条河流河谷阶地的年代学研究表明：高河漫滩主要形成于晚全新世时期３０００ａＢ．Ｐ．；Ｉ级阶地形成于中全新世时期６０００ａＢ．Ｐ．；Ⅱ和Ⅲ级形成于晚更新晚期１３０００～３４０００ａＢ．Ｐ；Ⅳ级以上阶地形成于晚更新世早期６７０００～９５０００ａＢ．Ｐ．。这些地貌面的年代是第四纪重要地质事件出现的时期。阶地高出河床的高度（Ｈ）与其相应的形成年代（Ａ）有较好
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| 关 键 词： | 新疆 河谷阶地 年代学 阶地高程 线性关系 |
DATE OF VALLEY TERRACES IN XINJIANG |
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| Bai Meixiang.DATE OF VALLEY TERRACES IN XINJIANG[J].Inland Earthquake,1998,12(1):13-19. |
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| Authors: | Bai Meixiang |
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| Institution: | Seismological Bureau of Xinjiang Uygur Autonomous Region Urumqi 830011 |
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| Abstract: | By studying the ages of valley terraces of 26 rivers at Altai Mountain, West Jungeer Mountain,southern and northern Tianshan, and Kunlun Mountain, it is indicated that high alluvial flats were mainly formed in 3 000 aB.P. of Late Recent, first order terraces in 6 000 aB.P. of Middle Recent, second and third order terraces in 13 000~34 000 aB.P. of late Late Epileistocene, and the forth or more order terraces in 67 000~95 000 aB.P.of early Late Epileistocene. These ages of the geomorphic surfaces were the periods in which important Quaternary' s geological events took place. In addition, there is a better linear logarithmic relation between the height (H) of a terrace over river bed and its corresponding formation age (A). |
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| Keywords: | Xinjiang Valley terrace Chronology Terrace elevation Linear relation |
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