干旱区生态环境知识资源中心(Arid): 基于碎屑锆石年代学对黄土高原物源及其时空差异的理解与展望

Arid

	基于碎屑锆石年代学对黄土高原物源及其时空差异的理解与展望
其他题名	Understanding and prospects of provenance and time-spatial differences in the Loess Plateau based on detrital zircon chronology
	牛燕宁; 綦琳; 乔彦松
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2021
卷号	44 期号:6 页码:1623-1634
中文摘要	中国黄土高原保存着全世界分布范围最广、厚度最大、连续性最好的风尘堆积,是第四纪非常有价值的陆相古气候古环境地质档案。半个多世纪以来,学界对风尘沉积的气候记录和黄土高原的成因进行了大量研究。然而,对黄土粉尘的确切来源以及物源历史是否存在时空变迁等问题尚存在广泛争议。通过对现有锆石年龄谱数据的统计分析,着重从黄土与周缘沙漠的亲缘关系、轨道年龄尺度和构造年龄尺度的角度着手,获得以下认识:(1)在获得北方干旱区沙漠确切年代学信息的基础上,应用碎屑锆石U-Pb年龄谱法有望实现厘清黄土与风成沙之间物源亲疏关系的远景目标。(2)现有数据识别出L1黄土的物源可能存在空间差异。(3)支持冰期-间冰期的黄土物源未发生重大改变的观点。(4)在构造时间尺度上,不同地区年龄谱表现出可能发生物源转移的时段明显重叠。(5)有限的红黏土年龄谱数据显示物源的空间差异很可能在第四纪之前就已存在。鉴于目前的数据量还较少,有必要深入开展工作。应用该方法,可以在连续的长时间尺度下对黄土物源变化历史开展研究,并为将来在黄土高原开展多地区多剖面物源对比工作积累数据集。
英文摘要	The Loess Plateau of China preserves the most widely distributed, thickest, and continuous aeolian dust deposits in the world. It is a valuable geological archive of continental paleoclimate and paleoenvironment in the Quaternary. For more than half a century, several studies have been conducted on the climate records of aeolian dust deposition and the genesis of the Loess Plateau. However, studies have yet to determine the exact source of loess dust and verify whether a temporal-spatial change occurred in the provenance history. In this study, existing zircon age spectral data are statistically analyzed to explore the genetic relationship of loess and the surrounding desert with orbital and tectonic age scales. Results reveal the following: (1) the application of zircon U- Pb age spectral method based on the obtained exact chronological information of deserts in northern arid regions may clarify the provenance relationship between loess and aeolian sand. (2) available data indicate that the provenance of L1 loess may be spatially different. (3) confirmation that the provenance of loess in the glacialinterglacial period has not changed significantly. (4) On the tectonic timescale, the age spectra of different regions indicate that the periods of possible provenance transfer have an obvious overlap. (5) The limited age spectral data of red clays suggest that spatial differences in provenance probably existed before the Quaternary. However, current data are limited; thus, further related studies should be conducted. Using this method, the history of changes in loess provenance may be explored on a continuous long-term scale, and data sets may be obtained and used for future provenance comparisons of multiple locations and profiles in the Loess Plateau.
中文关键词	碎屑锆石U-Pb测年 ; 物源示踪 ; 时空差异 ; 黄土高原
英文关键词	detrital zircon U-Pb dating source tracing time and space differences Loess Plateau
类型	Review
语种	中文
收录类别	CSCD
WOS类目	Geology
CSCD记录号	CSCD:7114541
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377648
作者单位	牛燕宁, 兰州理工大学土木工程学院;;兰州大学地质科学与矿产资源学院, ;;, 兰州;;兰州, 甘肃;;甘肃 730050;;730000, 中国.; 綦琳, 中国地质科学院地质力学研究所;;新构造运动与地质灾害重点实验室, ;;, ;;, 北京;;北京 100081;;100081, 中国.; 乔彦松, 中国地质科学院地质力学研究所;;新构造运动与地质灾害重点实验室, ;;, ;;, 北京;;北京 100081;;100081, 中国.
推荐引用方式 GB/T 7714	牛燕宁,綦琳,乔彦松. 基于碎屑锆石年代学对黄土高原物源及其时空差异的理解与展望[J],2021,44(6):1623-1634.
APA	牛燕宁,綦琳,&乔彦松.(2021).基于碎屑锆石年代学对黄土高原物源及其时空差异的理解与展望.干旱区地理,44(6),1623-1634.
MLA	牛燕宁,et al."基于碎屑锆石年代学对黄土高原物源及其时空差异的理解与展望".干旱区地理 44.6(2021):1623-1634.