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© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Mudeungsan (Mount Mudeung) is an extinct volcano located in the southwestern part of South Korea that was formed in the Late Cretaceous period. This mountain, 1187 m above sea level, is adjacent to Gwangju Metropolitan City, which has a large population (about 1.4 million) and volcanic rocks, including columnar joints, which form various types of outcrops. Although this mountain was listed as a national geopark in 2014 and a UNESCO Global Geopark in 2018, much basic research has yet to be carried out. In particular, there are no mineralogical studies of volcanic rock samples despite the well-preserved variety of volcanic rocks. For this study, X-ray diffraction analysis was conducted using rock samples from Mudeungsan columnar joints known as tuff. We report that the rocks are mostly dacite, mainly composed of quartz, plagioclase, and sanidine through Rietveld quantitative analysis. In particular, α-cristobalite, a crystalline polymorph of silica, appears in the columnar joint rocks, indicating that Mudeungsan experienced an explosive eruption during the formation of the mountain.

Details

Title
Mineralogy of the Mudeungsan Tuff (Republic of Korea) Using Synchrotron X-ray Powder Diffraction and Rietveld Quantitative Analysis
Author
Seoung, Donghoon 1   VIAFID ORCID Logo  ; Kim, Pyosang 1 ; Kim, Hyeonsu 1 ; Lee, Hyunseung 2 ; Huh, Min 3 ; Lee, Hyunwoo 4   VIAFID ORCID Logo  ; Lee, Yongmoon 2   VIAFID ORCID Logo 

 Department of Earth and Environmental Sciences, Chonnam National University, Gwangju 61186, Korea; [email protected] (D.S.); [email protected] (P.K.); [email protected] (H.K.); [email protected] (M.H.) 
 Department of Geological Sciences, Pusan National University, Busan 46241, Korea; [email protected] 
 Department of Earth and Environmental Sciences, Chonnam National University, Gwangju 61186, Korea; [email protected] (D.S.); [email protected] (P.K.); [email protected] (H.K.); [email protected] (M.H.); Mudeungsan UNESCO Geotourism Center, Chonnam National University, Gwangju 61186, Korea; Korea Dinosaur Research Center, Chonnam National University, Gwangju 61186, Korea 
 School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Korea 
First page
10796
Publication year
2021
Publication date
2021
Publisher
MDPI AG
e-ISSN
20763417
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2602003773
Copyright
© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.