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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Mineralogical Society of Korea
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Journal DOI :
The Mineralogical Society of Korea
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Volume & Issues
Volume 28, Issue 4 - Dec 2015
Volume 28, Issue 3 - Sep 2015
Volume 28, Issue 2 - Jun 2015
Volume 28, Issue 1 - Mar 2015
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Mineral Composition, Depositional Environment and Spectral Characteristics of Oil Shale Occurring in Dundgobi, Mongolia
Badrakh, Munkhsuren ; Yu, Jaehyung ; Jeong, Yongsik ; Lee, Gilljae ;
Journal of the Mineralogical Society of Korea, volume 28, issue 2, 2015, Pages 83~93
DOI : 10.9727/jmsk.2015.28.2.83
This study investigated genetic, mineralogical and spectral characteristics of oil shale and coal samples in Dundgobi area, Mongolia. Based the Rock/Eval and Total organic carbon (TOC) analysis, kerogen type, hydrogen quantity, thermal maturity and depositional environment were confirmed. Moreover, the mineral composition of oil shale and coal samples were analyzed by XRD and spectroscopy. The result of Rock Eval/TOC analysis revealed that the samples of Eedemt deposit are immature to mature source rocks with sufficient hydrocarbon potential, and the kerogen types were classified as Type I, Type II and Type III kerogen. On the other hand, the samples from Shine Us Khudag deposit were mature with good to very good hydrocarbon potential rocks where kengen types are defined as Type I, Type II/III and Type III kerogen. According to the carbon and sulfur contents, the depositional environment of the both sites were defined as a freshwater depositional environment. The XRD analysis revealed that the mineral composition of oil shale and coal samples were quartz, calcite, dolomite, illite, kaolinite, montmorillonite, anorthoclase, albite, microcline, orthoclase and analcime. The absorption features of oil shale samples were at 1412 nm and 1907 nm by clay minerals and water, 2206 nm by clay minerals of kaolinite and montmorillonite and 2306 nm by dolomite. It is considered that spectral characteristics on organic matter content test must be tested for oil shale exploration using remote sensing techniques.
Characterization of Behavior of Colloidal Zero-Valent Iron and Magnetite in Aqueous Environment
Lee, Woo Chun ; Kim, Soon-Oh ; Kim, Young-Ho ;
Journal of the Mineralogical Society of Korea, volume 28, issue 2, 2015, Pages 95~108
DOI : 10.9727/jmsk.2015.28.2.95
Nano-sized iron colloids are formed as acid mine drainage is exposed to surface environments and is introduced into surrounding water bodies. These iron nanomaterials invoke aesthetic contamination as well as adverse effects on aqueous ecosystems. In order to control them, the characteristics of their behaviour should be understood first, but the cumulative research outputs up to now are much less than the expected. Using zero-valent iron (ZVI) and magnetite, this study aims to investigate the behaviour of iron nanomaterials according to the change in the composition and pH of background electrolyte and the concentration of natural organic matter (NOM). The size and surface zeta potential of iron nanomaterials were measured using dynamic light scattering. Characteristic behaviour, such as aggregation and dispersion was compared each other based on the DLVO (Derjaguin, Landau, Verwey, and Overbeek) theory. Whereas iron nanomaterials showed a strong tendency of aggregation at the pH near point of zero charge (PZC) due to electrostatic attraction between particles, their dispersions became dominant at the pH which was higher or lower than PZC. In addition, the behaviour of iron nanomaterials was likely to be more significantly influenced by cations than anions in the electrolyte solutions. Particularly, it was observed that divalent cation influenced more effectively than monovalent cation in electrostatic attraction and repulsion between particles. It was also confirmed that the NOM enhanced the dispersion nanomaterials with increasing the negative charge of nanomaterials by coating on their surface. Under identical conditions, ZVI aggregated more easily than magnetite, and which would be attributed to the lower stability and larger reactivity of ZVI.
A Study on Mineralogical and Basic Mechanical Properties of Fault Gouges in 16 Faults, Korea
Moon, Seong-Woo ; Yun, Hyun-Seok ; Choo, Chang Oh ; Kim, Woo-Seok ; Seo, Yong-Seok ;
Journal of the Mineralogical Society of Korea, volume 28, issue 2, 2015, Pages 109~126
DOI : 10.9727/jmsk.2015.28.2.109
Because fault gouge developed at the center of fault is recognized as one of the most important weak sites, it is evident that clay mineralogy and physical properties greatly affect the rock stability. The purpose of this study is to establish the relationship of mineralogy and physical factors that control rock stability in fault zones. We analyzed a total of 51 samples from 16 main faults which were selected from a Korea fracture map, using XRD, SEM, and physical analyses like unit weight, friction and cohesion properties. Though it is considered that the most common clay minerals comprising fault gouge are kaolinite, illite and smectite, clay mineralogy slightly varies depending on lithology: illite > smectite > kaolinite and chlorite in volcanic rocks, kaolinite and chlorite > illite > smectite in sedimentary rocks, and illite > smectite > kaolinite and chlorite in abundance, respectively. Friction angle decreases with increasing clay content. Cohesion increases with increasing clay content below the 45 % region while it decreases with increasing clay content at the region higher than 45%, with some scatters in the data. It is likely that these results are ascribed to the physical heterogeneity of fault gouges with varying content of different clay minerals.
Effects of Fe Substitution on Lithium Incorporation into Muscovite
Chae, Jin-Ung ; Kwon, Kideok D. ;
Journal of the Mineralogical Society of Korea, volume 28, issue 2, 2015, Pages 127~133
DOI : 10.9727/jmsk.2015.28.2.127
Li-bearing muscovite is commonly found along with trioctahedral lepidolite in granitic pegmatites. Structurally,
ions can replace
ions in the interlayer (Int) of muscovite or incorporate into vacancies of the dioctahedral sheet (Sub). However, detailed mechanism of the lithium incorporation into muscovite is challenging to investigate using experimental techniques alone. In the current study, density functional theory (DFT) has been applied to examine the crystal structure and energy variation when
resides in the interlayer or the octahedral sheet. Depending on the position of
(i.e., Int vs. Sub), DFT showed significant differences in the mica's structures such as lattice parameters, sheet thickness, interlayer separation, and OH angles with respect to the ab plane. DFT further showed that, in pure muscovite,
has a lower energy when it is located in Int than Sub. By contrast, in the case of
substitution into the octahedral sheet,
has a lower energy in Sub than in Int. These results imply that
incorporates into the Al octahedral sheets only when the octahedral sheets possess structural charges, suggesting cation substitution in the octahedral sheets plays an important role in the Li incorporation mechanism into muscovite. They can also explain the experimental observation about the positive relationship between
amounts in Li-bearing muscovite.
A Study on Deterioration of Stone Monuments by Acid Fog
Do, Jin Young ; Kim, Sang Woo ; Cho, Hyen Goo ;
Journal of the Mineralogical Society of Korea, volume 28, issue 2, 2015, Pages 135~145
DOI : 10.9727/jmsk.2015.28.2.135
In order to predict the deterioration of stone monument due to acid fog, an artificial fog test using pH4.0 and pH5.6 was applied to the Gyeongju Namsan granite, decite and marble. After the test had weathered Gyeongju Namsan granite a larger weight reduction due to acid fog than fresh one. Decite has shown the most significant changes among the tested rocks with about 0.005 % of weight reduction. Decite and weathered granite will have considerable weight reduction due to acid rain than the acid fog, whereas the marble was expected to show a weight reduction regardless of the phase of water. The porosity and water absorption rate of weathered granite had significantly increased. This result means that the weathered rock is predicted to be more susceptible to acid fog than the fresh rock. The absorption rate of the marble after the test had shown approximately 50 % increase. The color of the samples had slightly changed towards yellow, such tendency was greater shown in weathered rocks. The marble reacted with acid fog had an increased whiteness. A large amount of cation in the samples is caused mainly by the dissociation of minerals through the reaction with acid fog.
Rare Metal Chemistry, Microstructures, and Mineralogy of Coal Ash from Thermal Power Plants of Korea
Jeong, Gi Young ; Kim, Seok-Hwi ; Kim, Kangjoo ;
Journal of the Mineralogical Society of Korea, volume 28, issue 2, 2015, Pages 147~163
DOI : 10.9727/jmsk.2015.28.2.147
Chemical and mineralogical properties of coal ash samples from the nine thermal power plants of Korea were investigated to acquire basic data for estimating the potential of rare metal recovery. Chemical compositions of coal ash were consistent with those of average shale and foreign coal ashes. However, there were small differences between the metal contents of domestic anthracitic and imported bituminous coal ashes. Unburned coal particles were much abundant in the ash of domestic anthracitic coal. Chalcophile elements were relatively enriched in the fly ash compared to bottom ash. Silicate glass was the major component of coal ash with minor minerals such as quartz, illite (muscovite), mullite, magnetite, lime, and anhydrite. Al and Si were the major components of the glass with varying contents of Ca, Fe, K, and Mg. Glass occurred in a form of porous sphere and irregular pumace-like grain often fused with iron oxide spheres or other glass grains. Iron oxide spheres were fine intergrowth of fast-grown iron oxide crystals in the matrix of silicate glass. Chemical, microstructural, and mineralogical properties would guide successful rare metal recovery from coal ash.
Consideration of Analysis Method of Asbestos and Existing Condition for Fibrous Materials in Domestic Air
Hwang, Jinyeon ; Oh, Jiho ; Lee, Hyomin ; Lee, Jinhyun ; Son, Byeongseo ;
Journal of the Mineralogical Society of Korea, volume 28, issue 2, 2015, Pages 165~171
DOI : 10.9727/jmsk.2015.28.2.165
Dust samples collected from air in metropolitan areas of Busan and Ulsan were analyzed by phase contrast microscopy, phase contrast dispersion microscopy and SEM. Asbestos concentration in dust samples was lower than detection limit. Many fibrous materials were observed in dust samples, but most of them were organic fibers. Inorganic fibers such as rock fiber, ceramic fiber and gypsum were contained in the samples and non-fibrous minerals such as quartz, calcite and feldspar were also occasionally observed. Domestic law requires that asbestos in air dust is mainly analyzed by phase contrast microscopy. From this study, however, precise analysis of asbestos was almost impossible by this method only. As indicated in JIS method of Japan, therefore, count and identification of asbestos were more efficient by dispersion staining method after removing organic materials in samples by low temperature incinerator.
Heavy Metal Uptake of Acacia from Tailing soil in Abandoned Jangun Mine, Korea
Jeong, Hong-Yun ; Kim, Young-Hun ; Kim, Jeong-Jin ;
Journal of the Mineralogical Society of Korea, volume 28, issue 2, 2015, Pages 173~185
DOI : 10.9727/jmsk.2015.28.2.173
Janggun mine (longitude
51'31.59") had been operated as an underground mine for last few decades. As the part of the remediation process, the surface of tailing dump was covered with uncontaminated soil about 20 cm in depth and acacia trees were planted. Heavy metal uptake of acacia from tailing soil has continued for the past 15 years. Heavy metal concentration ranges of tailing soil that contaminated with As (66.43-9325.34 mg/kg), Cd (0.96-1.09 mg/kg), Cu (16.90-57.60 mg/kg), Pb (57.33-945.67 mg/kg), and Zn (154.48-278.61 mg/kg) have higher than those of control soil As (38.98 mg/kg), Cd (0.42 mg/kg), Cu (10.26 mg/kg), Pb (8.21 mg/kg), Zn (46.74 mg/kg). The As, Cd, Cu, Pb and Zn concentrations of leaf of acacia in highly contaminated tailing dump were 165.95, 0.04, 10.68, 3.18, 48.11 mg/kg, respectively. The metal contents of leaf of acacia tree that obtained from uncontaminated control soil are 1.31 of As, 3.90 of Cu, 0.22 of Pb and 11.01 mg/kg of Zn. It was investigated that in the acacia tree, heavy metals such as As, Cu, Pb and Zn tend to be more highly concentrated in bark and leaf, compared with sapwood and heartwood.
Provenance Study on Ancient Lead Glass Relics Using a Lead Isotope Ratio
Han, Min Su ; Kim, So Jin ;
Journal of the Mineralogical Society of Korea, volume 28, issue 2, 2015, Pages 187~193
DOI : 10.9727/jmsk.2015.28.2.187
The purpose of the present study is to trace the provenance of lead raw materials using the lead isotope ratio of 9 lead glasses excavated from the Sarira hole of Mireuksaji stone pagoda and to determine correlation between them and other lead glasses excavated from the Wanggungri site. The results of chemical analysis of the 9 lead glasses show that they are common lead glass system(
) with respect to the contents of PbO (70 wt.%) and
(30 wt.%). The lead isotope ratios of them plot to northern Korean peninsula when applied to the distribution map of lead isotopes of East Asia. On the other hand, southern Korean peninsula is verified as the main deposits of the lead ore in the distribution map of lead isotopes of South Korea. With respect to the results, it is notable that the provenance of the 9 lead glasses can be very different depending on the distribution map. In addition, a comparative study between them and the lead glasses excavated from the Wanggungri which was built in the same region and period shows that their lead isotopes are highly correlated.
Characterization of Synthesized Strontianite: Effects of Ionic Strength, Temperature, and Aging Time on Crystal Morphology and Size
Lee, Seon Yong ; Lee, Choong Hyun ; Hur, Hyuck ; Seo, Jieun ; Lee, Young Jae ;
Journal of the Mineralogical Society of Korea, volume 28, issue 2, 2015, Pages 195~207
DOI : 10.9727/jmsk.2015.28.2.195
Physical properties of strontianite (
) synthesized under variable conditions such as different ionic strength, temperature, and aging time were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). All synthesized samples show a single phase of strontianite. Crystallinity of the synthesized strontianite increases with increasing temperature and ionic strength with
. Crystal sizes of the samples increase dramatically, and their morphology changes from rod or dendritic to prismatic shape as ionic strength and temperature of the solution increase. In addition, crystal sizes increase, and their morphology changes from rod or prismatic crystals to spheroidal aggregates with increasing aging time. These results suggest that changes in conditions of the synthesis for strontianite play an important role in controlling the crystallinity and morphology of results provide crucial information on the prediction for the physical properties of strontianite under different conditions during the formation of strontianite crystals.