干旱区生态环境知识资源中心(Arid): Clay minerals in the late Quaternary sediment of Tulare Lake, California: Implications for climate change, weathering, and erosion processes

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DOI	10.1016/j.ijsrc.2018.12.006
	Clay minerals in the late Quaternary sediment of Tulare Lake, California: Implications for climate change, weathering, and erosion processes
	Guo, Junhua; Pyles, Christine; Krugh, William; Negrini, Rob
通讯作者	Guo, Junhua
来源期刊	INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
ISSN	1001-6279
出版年	2019
卷号	34 期号:5 页码:432-443
英文摘要	The clay mineralogy of Tulare Lake sediment was examined to investigate hydroclimatic and environmental changes in the southern Sierra Nevada Mountains (SNM) since the most recent glacial maximum. Evolution of clay mineral assemblages elucidates significant changes in weathering, erosion, and hydroclimatic condition in the catchment. During the last glacial period (24.4-15.1 cal ka BP), low illite content implies less physical erosion of the granitic batholith rocks and a cold and arid environment in the southern SNM. Abrupt increases of illite content at 21.8-20.8 and 17.6 cal ka BP resulted from the glacier advances to the ablation zone and illite-rich glacier flour was transported down to the lake. The gradual increase of smectite induced by progressive depletion of illite-rich glacier flour from 17.6 cal ka BP toward the end of this period indicates climate was beginning to get warm and wet. From 11.9 to 5.3 cal ka BP, two warm and wet periods (10.7-9.4 and 8.2-5.2 cal ka BP) were characterized by high smectite/illite content ratios and low illite crystallinity values, suggesting intensive rainfall precipitation and more physical erosion in the highland and lowland catchment as well as more smectite formation in the terrace soils. Since the last glacial period, physical erosion, in comparison to the chemical weathering, was the dominant process responding to the hydroclimatic change in the Tulare Lake catchment. Moderate to weak chemical weathering was signified by the mostly low illite chemical weathering index of the core sediments. Such results suggest that vegetation cover in the southern SNM was low and limited. Published by Elsevier B.V. on behalf of International Research and Training Centre on Erosion and Sedimentation/the World Association for Sedimentation and Erosion Research
英文关键词	Clay mineralogy Sierra Nevada Mountains Glaciers Weathering Tulare Lake
类型	Article
语种	英语
国家	USA
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000474626000004
WOS关键词	SIERRA-NEVADA ; SOUTHERN CALIFORNIA ; HOLOCENE CLIMATE ; NORTHEAST ATLANTIC ; SURFACE SEDIMENTS ; HEINRICH EVENTS ; MOJAVE DESERT ; SWAMP LAKE ; OWENS LAKE ; RECORD
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216520
作者单位	Calif State Univ, Dept Geol Sci, Mailstop 66,9001 Stockdale Highway, Bakersfield, CA 93313 USA
推荐引用方式 GB/T 7714	Guo, Junhua,Pyles, Christine,Krugh, William,et al. Clay minerals in the late Quaternary sediment of Tulare Lake, California: Implications for climate change, weathering, and erosion processes[J],2019,34(5):432-443.
APA	Guo, Junhua,Pyles, Christine,Krugh, William,&Negrini, Rob.(2019).Clay minerals in the late Quaternary sediment of Tulare Lake, California: Implications for climate change, weathering, and erosion processes.INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH,34(5),432-443.
MLA	Guo, Junhua,et al."Clay minerals in the late Quaternary sediment of Tulare Lake, California: Implications for climate change, weathering, and erosion processes".INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH 34.5(2019):432-443.