• 제목/요약/키워드: Mt. Yeonhwa

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Sulfur and Carbon Isotope Studies of Principal Metallic Deposits in the Metallogenic Province of the Taebaeg Mt. Region, Korea (태백산지구(太白山地區)의 금속광상(金屬鑛床)에 대(對)한 유황(硫黃) 및 탄소안정동위체(炭素安定同位體)에 관(關)한 연구(硏究))

  • Lee, Min Sung
    • Economic and Environmental Geology
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    • v.18 no.3
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    • pp.247-251
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    • 1985
  • The sulfide and carbonate mineral samples for sulfur and carbon isotope studies were collected from Sangdong, Geodo, Yeonhwa, Shinyemi and Janggun mines which are distributed in the Metallogenetic Province of the Taebaeg Mt. Region. The ${\delta}S^{34}$ values of molybdenite, pyrite, arsenopyrite, pyrrhotite, chalcopyrite, sphalerite and galena from the above mines are similar and within the range of +1.66 to +6.77‰ with the exception of chalcopyrite from Geodo mine ranging from -1.58 to 1.96‰, while the sulfide minerals are dominated by positive values between +3.05 and +5.08‰. It is suggested that the major sulfur source is genetically related to the Cretaceous granitic activity. The average ${\delta}C^{13}$ values of calcite from limestone, calcite from calcite vein in ore bodies and granite, and rhodochrosite from ore bodies are -0.60‰, -2.69‰ and -6.00‰, respectively. The data on carbon isotope compositions indicate that the calcite from limestone originated in marine environment, the rhodochrosite in hydrothermal solution, and calcite from calcite vein and granite in the mixing condition of marine and hydrothermal waters. The temperatures of mineralization by the sulfur isotopic composition coexisting pyrite-pyrrhotite from Yeonhwa No.1, sphalerite-galena from Weolam and Dong-jeom of Yeonhwa No.1 mine, sphalerite-galena and pyrite-galena from Janggun mine were $273^{\circ}C$, $460{\sim}511^{\circ}C$, $561{\sim}690^{\circ}C$, $341^{\circ}C$ and $375^{\circ}C$, respectively.

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A Study on the Estimation of the Design Flood for Small Catchment in Sobaek (소백산 소하천 유역의 홍수량 산정에 대한 고찰)

  • Hyung Joon Chang;Seong Goo Kim;Ki Soon Park;Young Ho Yoon
    • Journal of Korean Society of Disaster and Security
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    • v.16 no.2
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    • pp.99-104
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    • 2023
  • In recent years, the occurrence of abnormal weather has increased rapidly, increasing the frequency of torrential rain. As a result, stable water resource management is difficult, and human and material damage is increasing. Various measures are being established to reduce damage caused by torrential rains, but small-scale mountain catchments are relatively difficult to manage due to lack of basic plan. In this study, the risk of flooding was evaluated using the rainfall-flow model in the Yeonhwa-dong catchment national park among national parks in Korea. The Yeonhwa-dong catchment of Mt. Sobaeksan was simulated to cause flooding when rainfall of more than 50 years occurred, and it was confirmed that there was a high risk of water resource structures, safety facilities, and trails.

Floristic Study of Vascular Plants in Yeonhwasan Mt. (Taebaek-si, Gangwon-do, Korea) (연화산(강원도 태백시)의 관속식물상)

  • Hyeon Jin Jeong;Ju Eun Jang;Aleksey L. Kim;Se Ryeong Lee;Young-Soo Kim;Ji Eun Kim;Jung Sim Lee;Kang Hyup Lee;Eun Su Kang;Sang-Kuk Han;Hee-Young Gil
    • Korean Journal of Plant Resources
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    • v.36 no.4
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    • pp.314-340
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    • 2023
  • Vascular plants of Yeonhwasan Mt., located in Taebaek-si, Gangwon-do, were investigated. Field surveys were conducted fourteen times between April and September of 2022. A total of 505 taxa were found consisting of 87 families, 282 genera, 441 species, 15 subspecies, 41 varieties, and 8 forma. Among them, the endemic plants of Korea were 22 taxa. The number of threatened and near threatened Red List plants designated by the Korean National Arboretum was four, comprising each one of critically endangered (CN), endangered (EN), vulnerable (VU), and near threatened (NT) species. The number of floristic target plants designated by the Ministry of Environment was 102, including one taxon of level V, 9 taxa of level IV, and 34 taxa of level III. Invasive alien plants were 34 taxa, and three taxa were ecosystem disturbance plants. The urbanization index of investigated site was 12.8%, and the naturalization index was 6.7%. To wisely manage Yeonhwasan, measures for preserving biodiversity and preventing invasive plants are needed.