干旱区生态环境知识资源中心(Arid): 新疆伊犁可克达拉剖面晚全新世古土壤与环境

Arid

	新疆伊犁可克达拉剖面晚全新世古土壤与环境
其他题名	LATE HOLOCENE PALEO-ENVIRONMENT RECONSTRUCTION WITH PALEOSOL FROM KEKDALA PROFILE IN YILI OF XINJIANG
	凌智永 1; 李志忠 2; 靳建辉 2
来源期刊	海洋地质与第四纪地质
ISSN	0256-1492
出版年	2016
卷号	36 期号:5 页码:157-164
中文摘要	通过对新疆伊犁可克达拉晚全新世风沙沉积剖面古土壤特性进行研究,结合沉积物磁化率、TOC、黏粒及CaCO_3等土壤发生学指标,发现古土壤发育于黄土母质,是荒漠草原植被下形成的具有弱黏化作用和弱钙积作用的淡灰钙土类型。不同时期风沙-古土壤沉积物的形成揭示了新疆伊犁河谷区3.7kaBP以来经历了多次气候干湿波动,共有6层不同发育程度的古土壤形成,后期形成的3层古土壤发育程度较前期的3层古土壤成熟;古土壤反映的古气候大致以2kaBP为时间界限分为前后两个阶段,前期气候相对干旱,后期气候相对湿润;近500年以来,风沙活动增强,气候又有逐渐变干的趋势。
英文摘要	For the purpose to study the characteristics of the Holocene paleo-aeolian sand and paleosol in the Kekdala profile,Yili of Xinjiang,we made a thorough analysis of magnetic susceptibility,TOC,clay fraction,and CaCO_3 of the sediments.The results show that the paleosol is resulted from the further weathering of loess deposits,as a kind of light gray desert soil formed under the weak clayization and calcification conditions in a desert-steppe environment.The paleo-aeolian sand and paleosol sequence suggest that the Yili valley of Xinjiang has suffered many times of climate fluctuations since 3.71kaBP.There are 6 layers of paleosol developed in different degrees during this period,with 3 layers formed in the early stage which are more developed than the 3 layers formed in the late stage.The paleoclimate inferred from paleosol could be divided into two stages taking the 2kaBP as the boundary,and the climate was dry in the early period but wet in the late period.Since 0.5kaBP,however,the climate has become warm-dry and the aeolian sand was strongly activated.
中文关键词	古土壤 ; 古气候 ; 可克达拉剖面 ; 新疆伊犁 ; 晚全新世
英文关键词	paleosol paleoclimate Kekdala profile Yili of Xinjiang Late Holocene
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:5832787
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234466
作者单位	1.中国科学院青海盐湖研究所, 青海省盐湖地质与环境重点实验室, 西宁, 青海 810008, 中国; 2.福建师范大学地理科学学院, 湿润亚热带生态-地理过程教育部重点实验室, 福州, 福建 350007, 中国
推荐引用方式 GB/T 7714	凌智永,李志忠,靳建辉. 新疆伊犁可克达拉剖面晚全新世古土壤与环境[J]. 中国科学院西北生态环境资源研究院,2016,36(5):157-164.
APA	凌智永,李志忠,&靳建辉.(2016).新疆伊犁可克达拉剖面晚全新世古土壤与环境.海洋地质与第四纪地质,36(5),157-164.
MLA	凌智永,et al."新疆伊犁可克达拉剖面晚全新世古土壤与环境".海洋地质与第四纪地质 36.5(2016):157-164.