干旱区生态环境知识资源中心(Arid): Origin, structure and geochemistry of a rock glacier near Don Juan Pond, Wright Valley, Antarctica

Arid

DOI	10.1017/S0954102020000139
	Origin, structure and geochemistry of a rock glacier near Don Juan Pond, Wright Valley, Antarctica
	Winsor, Kelsey; Swanger, Kate M.; Babcock, Esther L.; Dickson, James L.; Valletta, Rachel D.; Schmidt, Daniel F.
通讯作者	Swanger, KM
来源期刊	ANTARCTIC SCIENCE
ISSN	0954-1020
EISSN	1365-2079
出版年	2020
卷号	32 期号:4 页码:273-287
英文摘要	The South Fork of Wright Valley contains one of the largest rock glaciers in the McMurdo Dry Valleys, Antarctica, stretching 7 km from the eastern boundary of the Labyrinth and terminating at Don Juan Pond (DJP). Here, we use results from ground-penetrating radar (GPR), qualitative field observations, soil leaching analyses and X-ray diffraction analyses to investigate rock glacier development. The absence of significant clean ice in GPR data, paired with observations of talus and interstitial ice influx from the valley walls, support rock glacier formation via talus accumulation. A quartz-dominated subsurface composition and discontinuous, well-developed desert pavements suggest initial rock glacier formation occurred before the late Quaternary. Major ion data from soil leaching analyses show higher salt concentrations in the rock glacier and talus samples that are close to hypersaline DJP. These observations suggest that DJP acts as a local salt source to the rock glacier, as well as the surrounding talus slopes that host water track systems that deliver solutes back into the lake, suggesting a local feedback system. Finally, the lack of lacustrine sedimentation on the rock glacier is inconsistent with the advance of a glacially dammed lake into South Fork during the Last Glacial Maximum.
英文关键词	ground-penetrating radar major ion geochemistry McMurdo Dry Valleys permafrost water tracks X-ray diffraction
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000550781300005
WOS关键词	MCMURDO DRY VALLEYS ; SALTS ; WATER ; AREA ; SOIL ; ICE
WOS类目	Environmental Sciences ; Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325121
作者单位	[Winsor, Kelsey] No Arizona Univ, Sch Earth & Sustainabil, Flagstaff, AZ 86005 USA; [Swanger, Kate M.] Univ Massachusetts, Dept Environm Earth & Atmospher Sci, Lowell, MA 01854 USA; [Babcock, Esther L.] Log Geophys & Analyt LLC, Anchorage, AK 99508 USA; [Dickson, James L.] CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA; [Valletta, Rachel D.] Franklin Inst, Philadelphia, PA 19103 USA; [Schmidt, Daniel F.] Univ Massachusetts, Dept Plast Engn, Lowell, MA 01854 USA
推荐引用方式 GB/T 7714	Winsor, Kelsey,Swanger, Kate M.,Babcock, Esther L.,et al. Origin, structure and geochemistry of a rock glacier near Don Juan Pond, Wright Valley, Antarctica[J],2020,32(4):273-287.
APA	Winsor, Kelsey,Swanger, Kate M.,Babcock, Esther L.,Dickson, James L.,Valletta, Rachel D.,&Schmidt, Daniel F..(2020).Origin, structure and geochemistry of a rock glacier near Don Juan Pond, Wright Valley, Antarctica.ANTARCTIC SCIENCE,32(4),273-287.
MLA	Winsor, Kelsey,et al."Origin, structure and geochemistry of a rock glacier near Don Juan Pond, Wright Valley, Antarctica".ANTARCTIC SCIENCE 32.4(2020):273-287.