干旱区生态环境知识资源中心(Arid): 库姆塔格沙漠的形成时代与演化

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	库姆塔格沙漠的形成时代与演化
其他题名	Formative age and evolution of Kumtagh Desert
	唐进年 1; 苏志珠 2; 丁峰 1; 廖空太 1; 俄有浩 1; 翟新伟 3; 王继和1 ; 易志宇 3; 刘虎俊1 ; 张锦春 1
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2010
卷号	33 期号:3 页码:325-333
中文摘要	库姆塔格沙漠腹地广泛出露含古风成砂的第四纪地层剖面. 根据含古风成砂地层剖面的野外调查与地层年代的室内分析结果,并与已有的周边区域地质资料对比分析,库姆塔格沙漠形成至少始于早更新世初,到中更新世晚期285. 942. 9 ka BP沙漠已大面积扩展形成,奠定了现代沙漠环境格局. 沙漠最初从西南部开始形成,之后向北和东北扩展. 依据梭梭沟地层剖面,沙漠在第四纪演化过程中至少经历了19个沙漠正、逆过程旋回,平均周期约为110 ka. 新构造运动对沙漠的形成演化和地貌的形成发育具有重要作用,构造了山间断陷盆地并使其逐渐向封闭的干旱盆地演化形成沙漠,受四周断裂控制沙漠整体形态呈"扫帚状". 分布在沙漠北部的独特砾石体地貌形成于晚更新世末(285.942.9) ka BP之后.
英文摘要	The ancient aeolian sand has been thought of as the indicator that can indicate the formation and evolution of desert during the past time. Kumtagh Desert is located in the northen fringe of the Qinghai-Tibet Plateau. The first integrated scientific investigation of the desert had been completed in 2004 - 2006. Kumtagh Desert, where the Quaternary stratigraphic profile containing ancient aeolian sands is widely distributed, is a natural ideal model for studying the formation and evolution of desert. The comprehensive field investigation and studies on sedimentary, chronology and palynology of typcal profiles named Suosuo gully, Xiaoquan gully and gravel body with ancient aeolian sand layers showed that the Kumtagh Desert probably originated as early as (2 097. 7 314. 7) ka BP. During the period of (386. 9 58. 0) - (285. 9 42. 9) ka BP, the desert largely extended and established its modem distributional pattern. The desert developed originally in the southwest part of desert, subsequently, extended to the north and northeast. The sedimentary face of Suosuo gully profile revealed that the desert experienced at least 19 advance and inverse processes of desertification with average period of 110 ka during its evolution in the Quaternary. The neotectonic movements played an important role in the formation and development of the desert and its geomorphology. On the one hand, it caused the formation of intermontane fault basin, which was further developed towards the closed drought basin, and furthermore caused the formation of the natural environment for the desert formation. On the other hand, under the control of surrounding faults, the unique broom-shaped desert landscape was formed, and the gullies and sand ridges in this region experienced an abrupt directional change from north by west to north by east at the location of 39°45’ - 39°55’N. The unique landscape of gravel body occurred widely in the northern desert was formed after (285.9 42.9) ka BP. The results in this paper further provide scientific basis for investigating the formative age and evolutionary process of dry climate and environment in the north-western Chinese region, and the uplifting of Qinghai-Tibet Plateau as well as its responses to the global climatic chan-ges.
中文关键词	库姆塔格沙漠 ; 形成时代 ; 演化 ; 风成砂 ; 第四纪
英文关键词	Kumtagh Desert formative age evolution ancient aeolian sand Quaternary
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:3924006
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/224997
作者单位	1.甘肃民勤荒漠草地生态系统国家野外科学观测研究站, 甘肃省荒漠化防治重点实验室, 武威, 甘肃 733000, 中国; 2.山西大学历史文化学院, 太原, 山西 030006, 中国; 3.兰州大学资源环境学院, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	唐进年,苏志珠,丁峰,等. 库姆塔格沙漠的形成时代与演化[J]. 兰州大学,2010,33(3):325-333.
APA	唐进年.,苏志珠.,丁峰.,廖空太.,俄有浩.,...&张锦春.(2010).库姆塔格沙漠的形成时代与演化.干旱区地理,33(3),325-333.
MLA	唐进年,et al."库姆塔格沙漠的形成时代与演化".干旱区地理 33.3(2010):325-333.