Mineralogical Record for Stepwise Hydroclimatic Changes in Lake Qinghai Sediments Since the Last Glacial Period

doi:10.3390/min10110963

	Mineralogical Record for Stepwise Hydroclimatic Changes in Lake Qinghai Sediments Since the Last Glacial Period
	Song, Yougui 4,5; Zong, Xiulan 3,5; Qian, Linbo 1; Liu, Huifang 5; Dong, Jibao 4,5; Chang, Hong 4,5; Zhang, Mingyu 2
刊名	MINERALS
	2020-11-01
卷号	10 期号:11 页码:19
关键词	bulk mineral quartz aragonite carbonate the last glacial period Holocene hydroclimate Lake Qinghai
DOI	10.3390/min10110963
通讯作者	Song, Yougui(syg@ieecas.cn)
英文摘要	Lake Qinghai is sensitive to climatic changes because of its pivotal location between mid-latitude Westerlies and the low-latitude East Asian monsoon. An 18.6 m long drilling core (1Fs) from Lake Qinghai provides new information on the hydroclimatic dynamics since the last glacial period. Here, we present the results of bulk mineral assemblages of this core. X-ray diffraction (XRD) results showed that the bulk minerals of the core sediments consist of major clastic minerals (e.g., quartz, feldspar, muscovite), carbonates (e.g., calcite, aragonite, dolomite), and minor clay minerals (e.g., chlorite). Quartz as an exogenous detrital mineral in lake sediments, its abundance is related to lake level changes resulting from regional climate changes via fluvial/aeolian transportation. Aragonite was precipitated from water solutions or chemical alteration of pre-existing minerals or biogenic mediation, closely related to lake hydroclimate change. Mineral assemblages revealed remarkable stepwise hydroclimatic changes. High quartz content and low calcite without aragonite suggested a cold-wet climate condition under predominant westerlies during the last glacial period from 35 to 25.3 ka. Afterward, quartz decreased and aragonite occasionally appeared, indicating an unstable hydroclimatic condition during the last deglaciation. Since the Early Holocene (11.9-8.2 ka), predominant minerals shifted from terrigenous quartz to authigenic carbonates, suggesting an increasing lake level, possibly due to intensified Asian summer monsoon with increased effective moisture. Aragonite became the primary carbonate mineral, implying a warming and humid hydroclimate environment with a relatively higher lake-level. During the Middle Holocene (8.2-4.2 ka), aragonite showed a decreasing trend indicating a higher lake level with weak evaporation. During the Late Holocene since 4.2 ka, there were lower quartz and aragonite, suggesting a deep lake with a weak summer monsoon. Our quartz and carbonate minerals record provided essential clues to reconstruct hydroclimate change in Lake Qinghai since the last glacial period.
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences[XDB26000000] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB40000000] ; State Key Laboratory of Loess and Quaternary Geology grant[SKLLQGPY2006] ; External Cooperation Program grant of the Chinese Academy of Sciences[132B61KYSB20170005] ; Natural Science Foundation of China[41572162] ; Natural Science Foundation of China[40972230]
WOS关键词	NE TIBETAN PLATEAU ; GRAIN-SIZE ; ASIAN MONSOON ; ISOTOPE RECORDS ; QUARTZ GRAINS ; HOLOCENE ; CHINA ; VARIABILITY ; EVENTS ; BASIN
WOS研究方向	Mineralogy ; Mining & Mineral Processing
语种	英语
出版者	MDPI
WOS记录号	WOS:000593681000001
资助机构	Strategic Priority Research Program of the Chinese Academy of Sciences ; State Key Laboratory of Loess and Quaternary Geology grant ; External Cooperation Program grant of the Chinese Academy of Sciences ; Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/15596]
专题	地球环境研究所_古环境研究室第四纪科学与全球变化卓越创新中心
通讯作者	Song, Yougui
作者单位	1.Xingtai Univ, Sch Resource & Environm, Xingtai 054000, Peoples R China 2.Xian Inst Innovat Earth Environm Res, Xian 710061, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 5.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
推荐引用方式 GB/T 7714	Song, Yougui,Zong, Xiulan,Qian, Linbo,et al. Mineralogical Record for Stepwise Hydroclimatic Changes in Lake Qinghai Sediments Since the Last Glacial Period[J]. MINERALS,2020,10(11):19.
APA	Song, Yougui.,Zong, Xiulan.,Qian, Linbo.,Liu, Huifang.,Dong, Jibao.,...&Zhang, Mingyu.(2020).Mineralogical Record for Stepwise Hydroclimatic Changes in Lake Qinghai Sediments Since the Last Glacial Period.MINERALS,10(11),19.
MLA	Song, Yougui,et al."Mineralogical Record for Stepwise Hydroclimatic Changes in Lake Qinghai Sediments Since the Last Glacial Period".MINERALS 10.11(2020):19.