• Geotechnical Engineering
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• v.35 no.5
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• pp.39-43
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• 2019

• Korean Journal of Crystallography
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• v.9 no.2
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• pp.153-158
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• 1998

백금족 원소의 광화 마그마 내에서의 지화학적·결정학적 거동을 밝히기 위하여 백금, 안티모니, 테루리움계를 선택하여 800℃에서 안정한 광물 또는 화합물의 종류와 이들의 공생군, 원소간의 고용한계 등에 대해 실험적으로 연구하였다. 순도가 높은 각 원소를 초기 반응 물질로 하였으며, 고순도 석영관을 용기로 사용하였으며, 화학 반응 생성물은 반사현미경의, X선회절분석기, 전자현미분석기 등을 사용하여 분석하였다. 800℃에서 안정한 화합물로는, 백금(Pt), PtSb(stumpflite), PtSb2(geversite), PtTe, Pt3Te4, Pt2Te3, PtTe2(moncheite)이다. 이 연구 결과로부터 800℃에서의 상평형다이아그램을 정립하였다. 이 온도에서는 stumpflite와 geversite 및 moncheite가 현저히 치환고용체를 이루는데 그 한계는 각각 10 at.% Te, 28.5 at.% Te, 19.5 at.% Sb이다. 특히 원소광물인 백금과 stumpflite 및 moncheite는 화학성분은 이들 광물을 포함하고 있는 광상의 생성온도를 제시해 주는 지질온도계 역할을 할 수 있다.

• Journal of the Speleological Society of Korea
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• v.6 no.7
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• pp.15-16
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• 1981

우리나라의 용암동굴은 주로 화산지역인 제주도에 분포한다. 이 화산지역에서 화산이 분출할 때는 유동성 있는 현무암 용암에 의하여 이른바 용암동굴(Lava tunnel)이 형성 되는 것이다. 즉, 지하에 깊이 잠겨 있던 마그마가 그 분출의 위력에 부수되어 화구에서 지표로 밀려나온 것을 용암 또는 라바(Lava)라고 한다.(중략)

• Proceedings of the Mineralogical Society of Korea Conference
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• 2005.05a
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• pp.74-76
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• 2005

• Proceedings of the KSEEG Conference
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• 2002.04a
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• pp.469-471
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• 2002

• Proceedings of the Mineralogical Society of Korea Conference
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• 2004.05a
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• pp.13-16
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• 2004

• The Journal of the Petrological Society of Korea
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• v.25 no.3
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• pp.165-167
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• 2016

• Journal of the Mineralogical Society of Korea
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• v.27 no.2
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• pp.85-95
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• 2014

The felsitic intrusives of Bulguksa granitic rocks of late Cretaceous in age are located at Mt. Daeduk, Daegu, where two different types of tourmalines are found. Two tourmalines show rounded and radiating in morphology and are found in separated region, but in same felsitic rocks. In this study, we investigate the chemical differences between two types of tourmaline and the effect of growing condition of the crystal on the its morphology. The rounded tourmaline has more amounts of Al and vacancy and less amounts of Ca, Na, K, Fe, Mn, Mg, which commonly occupy X and Y-site of the tourmaline. On the basis of the Diffusion-limited aggregation model, morphological irregularity indicates the active mobility of the magma. The radiating tourmaline, therefore, crystallized with active magma condition relatively, and the rounded tourmaline crystallized with stable magma condition created by decreasing temperature and the concentration of felsic components as the magma differentiate continually.

• The Journal of the Petrological Society of Korea
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• v.23 no.2
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• pp.119-138
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• 2014

There are various ways to monitor active volcanoes, such as the method of observing the activity of a volcano with the naked eye, the method of referring to the past eruptive history based on the historic records and the method of monitoring volcanoes by using observation equipment. The most basic method from the observation equipment-using methods to monitor volcanoes is seismic monitoring. In addition to this, the ways to monitor volcanoes are as follows: resonance observation which may be effective to remove artificial noises from the seismic activities that are recorded in the seismograph, ground deformation by using precision leveling, electronic distance measurement, tiltmeter, GPS, and InSAR observation method, volcanic gas monitoring, hydrologic and meteorological monitoring, and other geophysical monitoring methods. These monitoring methods can make volcanic activities effectively monitored, determine the behavior of magmas in magma chambers and help predict the future volcanic eruptions more accurately and early warning, thus, minimize and mitigate the damage of volcanic hazards.

• Korean Journal of Mineralogy and Petrology
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• v.34 no.4
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• pp.293-311
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• 2021

The volcanic rocks that make up Yeongdo island, an administrative district located on the southern coast of Busan, are composed of andesitic and rhyolitic rocks. Andesitic rock is mainly composed of volcanic breccia has a phenorysts of plagioclase and contains rock fragments. The rhyolitic rock is composed of volcanic angular rock at the base of Mt. Bongnae, and welded tuff forms the main mass of Mt. Bongnae. The fiamme structure can be easily observed with the naked eye, and the higher the altitude, the weaker the welded structure develops and the less the amount of rock fragments and crystals constituting the welded tuff. It is indicated that the magma that formed this study area is related to the tectonic environment of the continental margin related to subduction, and that it erupted after undergoing fractional cystallization at the same time with some contaminant in the continental crust. As a result of analyzing the main elements by altitude, it is believed to be the result of mixing at least 4 times or more of magma batches.