Geological values of lava caves in Krongno Volcano Geopark, Dak Nong, Vietnam

La The Phuc, Hiroshi Tachihara, Tsutomu Honda, Luong Thi Tuat, Bui Van Thom, Nguyen Hoang, Yuriko Chikano, Katsuji Yoshida, Nguyen Thanh Tung, Pham Ngoc Danh, Nguyen Ba Hung, Tran Minh Duc, Pham Gia Minh Vu, Nguyen Thi Mai Hoa, Hoang Thi Bien, Truong Quang Quy, Nguyen Trung Minh

Abstract


The paper presents the initial results of the study of volcanic cave system and its typical formations in Krongno Volcano Geopark (KVG), Dak Nong, Vietnam. The volcanic caves have been discovered since 2007, under UNESCO sponsored the scientific project, are seen as unique geological heritages. The collaborative surveys and studies between Vietnamese geologists and the members of the Non-Profit Organization, Vulcanospeleological Society of Japan have discovered and surveyed 45 caves, and detailed mapping 20 caves. Using a complex of adequate methods, especially Remote Sensing image interpretation method, Surveying and mapping lava cave method, K/Ar dating isotopic analytical method and Current methodology, the studies aim to affirm endogenous origin of the lava cave system, the formation mechanism, as well as the typical formations of the caves. Up to date, the lava caves and interior formation in lava caves in KVG have been examined and evaluated in term of geological nature and recognized as pillar geological heritages of the Geopark.

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Keywords


geological heritage; geopark; lava cave; lavacicle; primary, viscosity



DOI: https://doi.org/10.15625/0866-7187/40/4/13101

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