• Journal of the Mineralogical Society of Korea
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• v.25 no.3
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• pp.131-141
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• 2012

The guano formed from the bat excrement in a cave contains various sulfate and phosphate minerals formed from the reaction of bat excrement with surrounding rocks and clastic minerals. Therefore, the mineral compositions in the guano provide basic informations on the geochemical environments affecting mineral formation in a cave. This study was conducted to study the mineral compositions of guano and the factors affecting those compositions by comparing mineralogical and chemical compositions in three different limestone caves in Korea. The guano samples in Gossi Cave contain detrital minerals such as illite, quartz and feldspar and relatively large amount of gypsum. The contents of gypsum increase with increasing depth, which is different from the samples collected in other caves. The samples collected from Baekryong Cave have the similar mineral compositions to those in Gossi Cave, but they also contain additional kaolinite and very small amount of gypsum. The samples in Sungryu Cave have similar mineralogical compositions to those in Gossi Cave, but contian bassanite instead of gypsum. The mineralogical compositions are well correlated with the chemical compositions of guano. The mineral compositions indicate that, in Gossi Cave, the minerals were formed by the reaction of large amount of bat excrement with surrounding rocks in high humidity condition or in the condition of frequent floods. In the case of Sungryu Cave, bassanite which can be formed in a dry condition indicates that minerals were formed in a relatively low humidity condition.

• The Journal of Engineering Geology
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• v.33 no.3
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• pp.413-426
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• 2023

This study presents the geochemical characteristics of cave water to evaluate its origin and flow path. From June 2022 to may 2023, river water was collected at two sites (WE1 and WE2) in the Donggang River around Baengnyongdonggul Cave, and cave water was collected at four sites (WE3 to WE6) inside Baengnyongdonggul Cave. Water samples were analyzed for major dissolved components. Both river and cave waters were classified as Ca-HCO₃ type. All cave water samples were supersaturated in carbonate minerals, suggesting that carbonate minerals would precipitate within the cave. Due to differences in the source of cave water and the degree of water-rock interaction, the geochemical characteristics of water from sites where the flow of cave water is observed (WE3 and WE6) and rimstone pools (WE4 and WE5) could be clearly distinguished. The cave water at WE6 flows in from the Donggang River, then passes through WE3 and flows back out into the Donggang River. The cave water at WE4 and WE5 is supplied from precipitation, but the flow path of cave water at WE4 and WE5 is different.

• Journal of the Speleological Society of Korea
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• v.29 no.30
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• pp.43-59
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• 1992

동굴의 환경에 따라 동굴내부의 동물상은 차이가 나타난다. 본 연구는 백용동굴을 중심으로 하여 환경에 따른 동물의 분포상태 및 동굴동물을 구분하였다 본 동굴의 동물상에 대하여는 과거에 남궁 준(1977.6, 1983.7), 남궁 준·백 남극(1979.12). 김 득수(1977.7, 1975.5), 남궁 준ㆍ조 규송(1989.8) 등에 의해 조사된 바 있고, 그 결과는 한국동굴보존협회의 "종합학술조사보고서(1979.12)", 한국자연보존협회 강원도 지부의 "강원도의 희귀자원 조사보고서 제4집(1987)", 강원도 평창군의 "백룡동굴 학술조사보고서(1989.12)"등을 통하여 모두 8강 24과 26속 28종의 동굴동물의 목록과 분포생태 등이 발표된 바 있다.(중략)

• Journal of the Speleological Society of Korea
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• v.3 no.3
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• pp.1-6
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• 1978

20세기 과학문명은 지구표면에 인적말답의 지역을 거의 없게 하였다. 그러나 아직도 뜻있는 탐험대상으로서 우리들의 흥미와 학구열을 자극하는 공간이 남아있으니, 그것이 바로 해저지형과 지하에 비장된 동굴현상인 것이다.(중략)

• Journal of the Korean earth science society
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• v.38 no.1
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• pp.64-79
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• 2017

We have reported the petrographic properties on the soda straw primarily based on the field measurements and discussed the causes of their traits. 156 soda straws in district B of the Baeg-nyong Cave nominated with the natural monument No. 260 have been investigated to estimate physical, sedimentological and textural characteristics. The soda straws have an average length of 3.05 cm with a standard deviation of 1.7 cm and a mean diameter of 6.0 mm. This result shows that the average diameter of the soda straws measured in this study is thicker than previous reports by 20%. Although the drip rates of cave water from 85.3% of all the soda straws are exceedingly lower than 1 drop per 10 minutes, almost all soda straws have a dripping water. We firstly report growth lamina in the Korean soda straw from 85.3% of all samples, and this textural dominance indicates that the growth lamina are one of the common features of the soda straws at least in the study area. Secondary precipitations inside the soda straw were identified from 68.6%. Notably, the strong inverse correlation between growth lamina and secondary precipitates was represented from 70.5% of all samples. This finding might be explained by the seasonality of cave drip water supplied into the soda straws or the increased opacity caused by secondary precipitates. Based on petrograhic characteristics, the soda straws in the study area can be classified into normal and erratic types. Hopefully our results on the soda straws in Baeg-nyong Cave would provide a basis for the descriptions of soda straws from other caves and paleoclimatic applications.