• Journal of the Mineralogical Society of Korea
• /
• v.16 no.1
• /
• pp.49-63
• /
• 2003

Rare and unusual occurrence of hydrothermal minerals were found in Geode mine area. They are developed in the late stage of hydrothermal alteration of earlier skarns and later by the open-space filling crystallization. The alteration of earlier skarns of clinopyroxene, garnet, and plagioclase formed mainly chlorite or sometimes uncommon hydrothermal minerals of prehnite, illite, and pumpellyite. Open-space filling crystallization characterized by hydrothermal minerals developedin open sapce or good are prehnite, pumpellyite, clinozoisite, illite, and Ca-zeolites of stilbite annstellerite. Mineral phases and paragenesis are examined in detail by microscopy, XRD, SEM, and EPMA. Using the Schreinemaker's method, equibrium reactions among these minerals are establishedand isothemal-isobaric phase diagrams of $\mu$$H_2O$-$\mu$$CO_2$cot are plotted. Hydrothermal minerals such asprehnite, pumpellyite, clinozoisite, illite, and some chlorite were ffrmed under high partial pressure of $CO_2$with relatively low $H_2$O fugacity. Later, stilbite and calcite in association with illite crystallized under relatively both high partial Pressure of $CO_2$and high $H_2$O fugacity.

• Journal of the Korean Geographical Society
• /
• v.51 no.6
• /
• pp.739-759
• /
• 2016

C. Gottsche(1855-1909), the Deutsch geologist, was invited by $M{\ddot{o}}llendorff$ who was the viceminister of foreign affairs in Korea, and travelled through the inland of Korean peninsula in 1884. He covered 2,550km in 138 days. After that journey, he wrote three academic papers about the geography and geology of Korea with the data of that field trip. Those paper bear considerable significance in that they included the first approaches to Korean geography and geology by a field-scientist with a modern academic training. Unlike other two papers focusing on the geology or the minerals, "The Geography of Korea(${\ddot{U}}ber$ Land und Leute in Korea(1886))" has its own value as a historical document, because it shows how the contempory Korea actually appeared to the eye of a $19^{th}$ western field-scientist. As this has not been introduced in Korean acdemic journals yet, this study might contribute to the understanding of how westerners regarded Korea in the end of 19th century.