干旱区生态环境知识资源中心(Arid): Geochemical studies and lacustrine geomorphology of Lake Yakhi basin in eastern Mongolia

Arid

DOI	10.4000/geomorphologie.15873
	Geochemical studies and lacustrine geomorphology of Lake Yakhi basin in eastern Mongolia
	Orkhonselenge, Alexander; Bulgan, Odmaa
通讯作者	Orkhonselenge, A (corresponding author), Natl Univ Mongolia, Lab Geochem & Geomorphol, Ulaanbaatar 14201, Mongolia.
来源期刊	GEOMORPHOLOGIE-RELIEF PROCESSUS ENVIRONNEMENT
ISSN	1266-5304
EISSN	1957-777X
出版年	2021
卷号	27 期号:3 页码:231-242
英文摘要	This study presents the landscape evolution of Lake Yakhi basin in eastern Mongolia where the lake plays an important role in the surface water resources. The multiple paleoshoreline features indicate wave-cut terraces, whereas the modern-day shorelines show that Lake Yakhi is at rapid northward regression. The paleo- and modern-day shorelines imply that the paleo-Lake Yakhi may have covered an extensive area with different hydrological conditions in the past. Lake Yakhi shows a decreasing trend in an area with a loss of similar to 62.2 km(2) or 63.9% of the total area during the past five decades. The hydrological dynamics of Lake Yakhi during the last 50 years show its shift into a playa lake coinciding with the local climate changes in warming since 1987 and drying since 1992. In the lake's margin, mafic igneous provenance indicates a derivation from weathered granite and gneiss terrains on the oceanic island arc. However, in the lake's center, felsic igneous and quartzose sedimentary provenances show a derivation from the pre-existing sedimentary terrain on the active continental margin. Lake Yakhi sediments show that the granite (felsic) and granite basalt (felsic to mafic) source rocks with mostly shale and arkose. The A-CN-K ternary plot shows granites, granodiorites, and tonalities dominated in the lake sediments may have been transported from the source rocks enriched in plagioclase and feldspars. The weathering trend in the source area shows a low degree of chemical weathering and the chemical maturity shows a climatic shift from semiarid to arid climatic conditions in the Lake Yakhi basin.
英文关键词	provenance tectonics weathering minerals Lake Yakhi Mongolia
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000721045100004
WOS关键词	TECTONIC SETTING DISCRIMINATION ; CRETACEOUS SHALES ; LATE PLEISTOCENE ; BOON-TSAGAAN ; GOBI DESERT ; OROG-NUUR ; PROVENANCE ; CLIMATE ; RECORDS ; AREA
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/373581
作者单位	[Orkhonselenge, Alexander; Bulgan, Odmaa] Natl Univ Mongolia, Lab Geochem & Geomorphol, Ulaanbaatar 14201, Mongolia; [Bulgan, Odmaa] Adm Off Protected Areas, Dornod Branch, Kherlen 9, Domod 21060, Mongolia
推荐引用方式 GB/T 7714	Orkhonselenge, Alexander,Bulgan, Odmaa. Geochemical studies and lacustrine geomorphology of Lake Yakhi basin in eastern Mongolia[J],2021,27(3):231-242.
APA	Orkhonselenge, Alexander,&Bulgan, Odmaa.(2021).Geochemical studies and lacustrine geomorphology of Lake Yakhi basin in eastern Mongolia.GEOMORPHOLOGIE-RELIEF PROCESSUS ENVIRONNEMENT,27(3),231-242.
MLA	Orkhonselenge, Alexander,et al."Geochemical studies and lacustrine geomorphology of Lake Yakhi basin in eastern Mongolia".GEOMORPHOLOGIE-RELIEF PROCESSUS ENVIRONNEMENT 27.3(2021):231-242.