• 자원환경지질
• /
• 제27권4호
• /
• pp.335-343
• /
• 1994

The Eonyang amethyst deposits are composed of vug quartz emplaced in the Eonyang granites of Mesozoic Cretaceous age. The Eonyang granites are composed of biotite granite, porphyritic biotite granite, aplite and miarolitic granite. The petrochemical data of the Eonyang granites show the trend of subalkaline magma, calc-alkaline magma, I-type granitoid and magnetite series. The vug quartz show the characteristic growth zoning (white quartz-smoky quartz-amethyst) from wall side. Generally fluid inclusions in the vug quartz can be divided into four main types based on compositions (I-type: gas inclusion, II-type: liquid inclusion, III-type: polyphase inclusion, IV-type: liquid $CO_2$-bearing inclusion). Solid phase of polyphase inclusions are halite(NaCl), sylvite(KCl), hematite ($Fe_2O_3$) and unknown anisotropic solid. Homogenization temperatures inferred from the fluid inclusion study ranges from $440^{\circ}C$ to $485^{\circ}C$ in white quartz, from $227^{\circ}C$ to $384^{\circ}C$ in smoky quartz, from $133^{\circ}C$ to $186^{\circ}C$ in amethyst, respectively. Salinities of fluid inclusions in each mineralization stages ranges from 40 wt.% to 58 wt.% in white and smoky quartz, from 1.0 wt.% to 8.7 wt.% in amethyst respectively. A consideration of the pressure regime during vug quartz deposition based on the boiling evidence suggests lithostatic pressure of less than 72 bars. This range of pressure indicate that vug quartz lay at depth of 750 m below the surface at the during mineralization.

• Smart Structures and Systems
• /
• 제21권6호
• /
• pp.751-759
• /
• 2018

Glass fibre reinforced polymers (GFRP) are widely exploited in many industrial branches. Due to this Structural Health Monitoring systems containing embedded fibre optics sensors are applied. One of the problems that can influence on composite element durability is water contamination that can be introduced into material structure during manufacturing. Such inclusion can be a damage origin significantly decreasing mechanical properties of an element. A non-destructive method that can be applied for inspection of an internal structure of elements is THz spectroscopy. It can be used for identifications of material discontinuities that results in changes of absorption, refractive index or scattering of propagating THz waves. The limitations of THz propagation through water makes this technique a promising solution for detection of a water inclusion. The paper presents an application of THz spectroscopy for detection and localisation of a water drop inclusion embedded in a GFRP material between two fibre optics with fibre Bragg grating sensors. The proposed filtering method allowed to determine a 3D shape of the water drop.

• 자원환경지질
• /
• 제22권3호
• /
• pp.193-205
• /
• 1989

Regional geology of Chungil mine is composed of Cretaceous biotite granite. Chungil ore deposits are fissure filled quartz veins which developed in Cretaceous biotite granites. Mineralogic and fluid inclusion studies were undertaken to illuminate the origin of the ore deposits. Data gathered from occurrences of ore deposits and mineral paragenesis reveals that there were two major mineralization stage. The first stage is sulfides-quartz stage. The constituents of ore minerals are chalcopyrite, sphalerite, pyrrhotite with minor amount of galena, native Au, Ag, pyrite. The second stage is gangue mineral stage. Gangue minerals are quartz, fluorite and calcite. Homogenization temperature of fluid inclusions in quartz of the first and the second stage ranges from $212^{\circ}C$ to $336^{\circ}C$ and from $154^{\circ}C$ to $355^{\circ}C$ respectively. Homogenization temperature in fluorite and calcite of the second stage ranges from $127^{\circ}C$ to $252^{\circ}C$ and from $129^{\circ}C$ to $158^{\circ}C$ but these data require positive pressure corrections. Fluid inclusions in quartz of the Bongmyeong mine, Jangja the first mine and the second mine show range of homogenization temperature from $178^{\circ}C$ to $330^{\circ}C$, from $185^{\circ}C$ to $354^{\circ}C$ and from $206^{\circ}C$ to 336 respectively. The comparison of the fluid inclusion data, mineralogical component and vein attitude of the three mines with that of Chungil mine indicates that the origin of the deposits above mentioned is elucidated to be formed under similar environment. The compositions of the sphalerite in the first stage range from 16.05 mol.% FeS to 20.36 mol.% FeS.

• Journal of Pharmaceutical Investigation
• /
• 제28권4호
• /
• pp.257-266
• /
• 1998

To improve the solubility and dissolution rate of acyclovir (ACV), which is low oral bioavailability due to its properties of slight solubility in water and incomplete gastrointestinal absorption, the solid inclusion complexes of ACV with ${\alpha}CD$, ${\beta}CD$, $DM{\beta}CD$ in molar ratio of 1:1 were prepared by the freeze-drying method. The inclusion complexes were investigated by solubility study, UV, IR and DSC. The dissolution rate of ACV was significantly increased by ACV-CDs inclusion complex formation in artificial intestinal fluid at pH 6.8. The enhanced dissolution rate of ACV could be due to an increase of solubility and the formation of an amorphous structures through inclusion complexation with CDs. Especially, $ACV-DM{\beta}CD$ inclusion complex enhanced the maximum plasma concentration levels and AUC following oral administration compared to those of ACV alone. The present results suggest that $ACV-DM{\beta}CD$ inclusion complex serves as a potential carrier for improving the solubility, the dissolution rate and the bioavailability of ACV.

• 한국임상수의학회지
• /
• 제30권4호
• /
• pp.305-309
• /
• 2013

개에서 자궁축농증은 발정휴지기에 주로 발생하는 질병으로서 급성으로 발병하여 만성 질병 경과를 나타낸다. 또한 장막성 낭포는 분만 후 자궁의 퇴축이 급속하게 일어나는 수복기 동안 흔히 발생한다. 10세 암컷 골든 리트리버견이 무기력, 식욕부진, 빈호흡, 복부팽만 및 비정상적인 외음부 분비물의 증상으로 내원하였다. 방사선 검사, 초음파 검사 및 실험실적 검사를 통하여 자궁축농증으로 진단되었고 난소자궁적출술이 시행되었다. 육안으로 관찰한 결과, 자궁은 팽만 되어 있었으며, 부분적으로 복벽과 유착되어있었다. 또한, 자궁 전반에 걸쳐 맑은 액체로 충만해 있는 낭포들이 관찰되었다. 세균배양검사를 통하여 자궁내강에 차있던 농에서 대장균이 감염되어있다는 것을 확인하였으며, enrofloxacin에 감수성이 있었다. 낭포에 대한 조직검사를 실시하여 자궁축농증과 장막성 낭포로 최종 진단하였다.

• 자원환경지질
• /
• 제34권2호
• /
• pp.157-166
• /
• 2001

중국 남부 호남성에는 수많은 천금속을 배태하고 있는 열수맥 광상이 산출하고 있다. 당관포 연-아연-주석-은 광산은 이들 중에서 대표적인 광산이다. 연-아연-주석-은 광화작용은 고생대 변성퇴적암의 단층열극을 충전하는 괴상 단성맥내에 배태되어 있다. 당관포 연-아연 광성에는 섬아연석, 황동석, 방연석, 황철석, 유비철석, 자류철석이 배태되어 있으며, 소량의 함주석 및 안티모니 황화광물(황석석, 테알라이트, 보우란제라이트, 사면동석)도 산출된다. 황석석과 섬아연석의 철-아연 분배작용에 근거하여, 본 광물조합의 형성온도를 계산하면 300。~33$0^{\circ}C$이며, 석영내 유체포유물의 균질화 온도(207$^{\circ}$~358$^{\circ}C$)중 최상부와 일치하고 있음을 알수 있다. 유체포유물 자료에 의하면, 연-아연-주석-은 광화작용은 207。~358$^{\circ}C$의 균질화 온도와 비교적 낮은 염농도(11.2~7.3 wt.% eq. NaCl)를 지닌 $H_{2}O$-NaCl계 유체로부터 형성되었음을 지시한다. 균질화 온도와 염농도 관계에 의하면, 초기 비등 후에 냉각 및 희석작용이 발생했음을 시사한다. 초기 비등의 증거는 180 bar정도의 유체 포획압력을 지시한다. -5.0~1.1$\textperthousand$의 ${\delta}^{34}S{{\Sigma}S}$ 값은 당관포 함연-아연-주석-은 열수유체의 황이 화성기원임을 지시한다.

• 자원환경지질
• /
• 제1권1호
• /
• pp.74-82
• /
• 1968

• 자원환경지질
• /
• 제29권2호
• /
• pp.119-127
• /
• 1996

Electrum-sulfide minerals of the Namsan Au-Ag mine were deposited in two stages of quartz and calcite veins that fill fault planes in Mesozoic granitic rocks (230~155 Ma). The K/Ar radiometric dating of hydrothermal sericite indicates that mineralization is early Cretaceous age ($127{\pm}3.0Ma$). Mineralogic, fluid inclusion and sulfur isotopic data show that ore minerals were deposited at temperatures between $340^{\circ}C$ and $200^{\circ}C$ from fluid with salinities of 3 to 6 equiv. wt % NaCl. Evidence of fluid boiling (and $CO_2$ effervescence) indicates a maximum pressures of 100 bars. The formation temperature and $fs_2$, of Au-mineralization from the Namsan mines are mainly $280{\sim}230^{\circ}C$ and $10^{-11}{\sim}10^{-13}$ atm, respectively. Au deposition was likely a result of boiling caused to chemical change (pH, $f_{O2}$, ${\Sigma}_{H_2S{\cdot}{\cdot}}$) of ore-fluids. Sulfur isotope composition of sulfide minerals (${\delta}^{34}S=5.1$ to 8.2‰) are consistent with ${\delta}^{34}S_{{\Sigma}{H2S}}$ value of +6 to +7‰, suggesting an igneous source of sulfur partially mixed with wall-rock sulfur.

• 자원환경지질
• /
• 제26권2호
• /
• pp.167-174
• /
• 1993

국내 광상의 유체포유물에 대한 지화학 조성이 제한적이나마 비파괴 방법과 파괴 방법을 이용하여 분석 탐지 되었다. 그 동안의 유체포유물 연구 결과는 균질화온도와 염농도가 정비례함을 보여주고, 중석과 동 광상의 것이 금광상의 것 보다 좀더 높은 균질화온도와 염농도를 갖는 경향을 보여준다. 값진 보석 자수정을 산출하는 언양 화강암의 유체포유물은 많은 소금 결정을 딸광물로 가지고 있는데, 이 점에 있어서는 마그마로부터 근원한 최초의 유체는 아주 염도가 높았을 것을 잘 나타내 주고 있는 셈이다. 파괴분석에 의해 탄산깨스, 질소, 메탄, $H_2S$, $SO_2$가 대부분의 광상에서 검출됨에도 불구하고, 레이저 마이크로푸르브 (RLM) 분석에 의해서는 하나의 금광상에서 탄산깨스, 질소, 메탄이 검출되었을 뿐, 다른 광상의 유체포유물로부터 이들 성분이 분석되지 않았슴은 RLM 분석은 다수의 개별 유체포유물을 대상으로 분석해야 함을 암시해 주고 있다. 한국 금광상의 유체포유물은 소금 결정을 보이지 않는다. 유체포유물의 지화학, 균질화온도 및 염농도는 잠두광체 탐사에 응용 이용될 수 있다.

• 대한자원환경지질학회:학술대회논문집
• /
• 대한자원환경지질학회 2001년도 춘계 공동학술발표회
• /
• pp.349-349
• /
• 2001