Formation of the Huajiang Grand Canyon (southwestern China) driven by the evolution of a Late Pleistocene tiankeng

Yunlong Fan; Andrea Columbu; Kangning Xiong; Guangjie Luo; Song Li; Xuefeng Wang; Yangyang Wu

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Formation of the Huajiang Grand Canyon (southwestern China) driven by the evolution of a Late Pleistocene tiankeng

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Collapse is a common geomorphic process in karst areas,especially on the Yunnan-Guizhou Plateau,which has a tectonic background of integral uplift.The frequent occurrence of collapse processes in karst underground caves and canyons indicates that collapses play an important role in the formation of canyons.Through an analysis of the morphology of a semicircular cliff in the Huajiang Grand Canyon and an investigation of sediments at the bottom of the cliff,a large-scale collapse event was found to have occurred.U-series dating of secondary calcium carbonate cement in the collapse breccias indicates that collapse processes occurred approximately 200 ka.According to the geomorphological evolution of the Huajiang Grand Canyon,the following geomorphic evolutionary process is proposed:underground river-cave hall-collapse of a tiankeng-tiankeng degradation-canyon formation.These findings also show that the dating of collapsed breccia cement can be effectively used to determine the development times of karst canyons and the formation ages of tiankengs.

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《中国地球化学学报：英文版》 |2022年第1期|1-11|共11页
作者
Yunlong Fan; Andrea Columbu; Kangning Xiong; Guangjie Luo; Song Li; Xuefeng Wang; Yangyang Wu;
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作者单位

Key Laboratory of Western China’s Environmental Systems(Ministry of Education) of Earth and Environmental Sciences University 730000;

Guizhou Provincial Key Laboratory of Geographic State Monitoring of Watershed of Geography and Resource Science Education University 550018;

Department of Chemistry Sciences and Environmental Sustainability of Parma Parma;

School of Karst Science Normal University 550001;

Key Laboratory of Cenozoic Geology and Environment of Geology and Geophysics Academy of Sciences 100029;

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原文格式 PDF
正文语种 chi
中图分类海洋基础科学;
关键词
CANYON; Cave collapse; TIANKENG; Karst breccias; Yunnan-Guizhou Plateau;

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1. Paleo climate Evolution since the Late Early Pleistocene:an Evidence from a Loess Record,Garzê，West Sichuan Plateau [A] . Dongyan Liu . 2009

Formation of the Huajiang Grand Canyon (southwestern China) driven by the evolution of a Late Pleistocene tiankeng

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