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DOI	10.1016/j.quaint.2017.07.027
	Characteristic grain-size component - A useful process-related parameter for grain-size analysis of lacustrine clastics?
	Lu, Yin; Fang, Xiaomin; Friedrich, Oliver; Song, Chunhui
通讯作者	Lu, Y ; Fang, XM (通讯作者)
发表日期	2018
ISSN	1040-6182
EISSN	1873-4553
起始页码	90
结束页码	99
卷号	479
英文摘要	Lacustrine sediments are important archives for paleoclimate reconstructions. The application of grainsize analysis as palaeoclimatic proxy in lacustrine clastics is valuable but also difficult because the typical polymodal grain-size distribution in these clastics. To better understand the grain-size distribution of lacustrine clastics and to promote the application of grain size in paleoenvironmental interpretation, this study investigates lacustrine clastics from northern and southern China. The grain-size distribution of these sediments was decomposed by log-normal distribution function fitting method. Based on the results, and drawing upon the concept of paleomagnetic demagnetization and Characteristic Remnant Magnetization from paleomagnetism, a conceptual system has been established and defined for grainsize distribution analysis. The system is composed of four components: (I) Characteristic Grain Size Component (ChGSC), (II) Affiliated Grain Size Component, (III) Meaningful Grain Size Component, and (IV) Combination Feature of Grain Size Components (CFGSCs). Based on the proposed system, ChGSC and CFGSCs were used to detect the grain-size distribution of clastics from the different lake zones investigated. Our results show the number, modal size, and percentage of ChGSC(s) in grain-size distributions are sensitive to changes in the lacustrine environment. The ChGSC(s) mirrors the dominant depositional process and hydrodynamic conditions. The modal size of ChGSC(s) is more sensitive to hydrological conditions than the widely used mean grain-size approach. Thus, the ChGSC(s) provide a useful processrelated parameter for paleoenvironmental reconstructions. To test this promising application, we applied this approach to a deep drill core from the Qaidam Basin in the northeastern Tibetan Plateau. (C) 2017 Elsevier Ltd and INQUA. All rights reserved.
关键词	NE TIBETAN PLATEAU WESTERN QAIDAM BASIN LAKE DONGGI CONA CLIMATE-CHANGE DEPOSITIONAL PROCESSES TRANSPORT PROCESSES LEVEL STATUS SEDIMENTS RECORD MONSOON
英文关键词	Lacustrine sediments; Grain-size distribution; Grain-size curve fitting; Paleoenvironment
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000433225600012
来源期刊	QUATERNARY INTERNATIONAL
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259219
推荐引用方式 GB/T 7714	Lu, Yin,Fang, Xiaomin,Friedrich, Oliver,et al. Characteristic grain-size component - A useful process-related parameter for grain-size analysis of lacustrine clastics?[J]. 中国科学院青藏高原研究所,2018,479.
APA	Lu, Yin,Fang, Xiaomin,Friedrich, Oliver,&Song, Chunhui.(2018).Characteristic grain-size component - A useful process-related parameter for grain-size analysis of lacustrine clastics?.QUATERNARY INTERNATIONAL,479.
MLA	Lu, Yin,et al."Characteristic grain-size component - A useful process-related parameter for grain-size analysis of lacustrine clastics?".QUATERNARY INTERNATIONAL 479(2018).