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Morphodynamic development of the Terkhiin Tsagaan Lake Depression,Central Mongolia:Implications for the relationships of Faulting,Volcanic Activity,and Lake Depression Formation

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Journal of Mountain Science 2022年第9期19卷 2451-2468页

作者： Altanbold ENKHBOLD Ulambadrakh KHUKHUUDEI Timothy KUSKY CHUN Xi gansukh yadamsuren Byambabayar GANBOLD Tuvshin GERELMAA Laboratory of Geopedology Department of GeographySchool of Art and SciencesNational University of MongoliaUlaanbaatar 210646Mongolia Department of Geology and Geophysics School of Arts and SciencesNational University of MongoliaUlaanbaatar 210646Mongolia Center for Global Tectonics School of Earth Sciences and State Key Laboratory for Geological Processes and Mineral ResourcesChina University of GeosciencesWuhan 430074China Provincial Key Laboratory of Mongolian Plateau's Climate System Inner Mongolia Normal UniversityHohhot 010022China Inner Mongolia Restoration Engineering Laboratory of Wetland Eco-environment System Inner Mongolia Normal UniversityHohhot 010022China Department of Ecology School of AgroecologyMongolian University of Life SciencesUlaanbaatar 17024Mongolia

Data on the origin and morphology of lake depressions caused by volcanism are scarce in *** studies focused on climate change patterns based on Terkhiin Tsagaan Lake *** present a result of existing reconstructions of lake depression development and changes in the hydrology system during the Khorgo volcanic activation and the Holocene environmental change.A depression of the Terkhiin Tsagaan Lake is formed by a lava flow barrier from the Khorgo ***,the Khorgo volcanic eruption and the lake depression that could shape a large lake have arisen instead from a *** morphometric analysis and field measurements indicate that the derivation of the Terkhiin Tsagaan Lake depression and Khorgo volcano may have evolved from movement on a sinistral strike-slip fault,which is about 70 km *** southern mountains and rivers were displaced from northwest to southeast along the Terkh *** offset along Terkh Fault is 4.02-5.28 km in the depression of the Terkhiin Tsagaan *** movement,a wide valley of the Terkh River developed in the present *** active Khorgo Volcano formed along the Khorgo *** Terkhiin Tsagaan Lake is formed by blocked water from the PaleoTerkh River after lava damming from the Khorgo *** initial paleo-lake area was about 195.7km^(2),which was three times larger than the modern *** current water volume of the Terkhiin Tsagaan Lake is 0.351 km^(3) while the volume of the paleo-lake was 2.248 km^(3).Based on this volume indicator the paleo-lake was 6.4 times larger than the current *** water from the lake depression formed the Suman River by a drying canyon through the lava plateau,but the canyon is along the Terkh *** in the water volume of Terkhiin Tsagaan Lake and erosion of Suman River canyon are inversely related to each *** present the morphometric relationships between the lava plateau of Khorgo Volcano and development of Terkhiin Tsagaan Lake depressi

关键词： Khangay Mountain Khorgo Volcano Lava plateau Sinistral strike-slip fault Terkhiin Tsagaan Lake Morphometric analysis

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