http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Mahmoud A. Galmed,Hisham A. Gahlan,Habes A. Ghrefat,Essam A. Mohamed,Khaled M. Al Kahtany 한국지질과학협의회 2024 Geosciences Journal Vol.28 No.3
In the central north of Saudi Arabia, outcrop samples from the Cretaceous bauxite profile deposits in the Az Zabirah area were subjected to a comprehensive evaluation aimed at investigating their petrographical and geochemical characteristics using X-ray diffraction analysis (XRD), Scanning electron microscope (SEM) coupled with Energy dispersive (EDS) analysis, and X-ray fluorescence spectrometer (XRF) analysis. These bauxite deposits in the Az Zabirah area comprises of three main zones: the South zone, the Central zone, and the North zone. Petrologically, the bauxite samples predominantly consist of oolitic to pisolitic grains that are bound together by a matrix comprising bauxitic materials, iron oxides, calcite, and/or kaolinite. Mineralogical investigations indicate that the primary mineral composition of the bauxite includes gibbsite, boehmite, diaspore (kaolinite), hematite, quartz, and calcite. XRF showed that the dominant chemical components of the bauxite samples are Al2O3, SiO2, and Fe2O3. When considering the collective data from the rare earth elements (REEs) analysis (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) and chemical weathering indices such as the Chemical Index of Alteration (CIA), Chemical Index of Weathering (CIW), and Weathering Index of Parker (WIP), it becomes evident that the Az Zabirah South Zone bauxite laterite profile at Al Ba’itha mine was formed under the influence of significant and persistent weathering conditions. The findings and methods used in this study are considered beneficial and valuable as they support mineral exploration in arid and semi-arid environments.
Two New Subspecies of Gastropoda(Mollusca) from Korean Waters
조병래,윤숙희,하베 타다시게,Choe, Byung-Lae,Yoon, Sook-Hee,Habe Tadashige The Korean Society of Systematic Zoology 1992 Korean Journal of Systematic Zoology Special Issue Vol.3 No.-
1982년 8월부터 1990년 11월까지 남한의 4개 지역에서 채집한 한국산 복족류를 동정한 결과 2신아종[Scelidotoma vadososinuata hoonsooi, n. subsp., Buccinum mirandum koreanum, n. subsp.]이 밝혀졌기에 이들 신아종을 보고한다. Two new subspecies of Gastropoda, Scelidotoma vadososinuata hoonsooi(Archaeogastropoda) and Buccinum mirandum koreanum (Neogastropoda) are reported in this paper.
Yousef Nazzal,Izrar Ahmed,Nassir S.N. Al-Arifi,Habes Ghrefat,Awni Batayneh,Bassam A. Abuamarah,Faisal K. Zaidi 한국지질과학협의회 2015 Geosciences Journal Vol.19 No.1
The present study includes detailed hydrochemicalassessment of groundwater resources of Saq aquifer. The Saq aquifercovers a large area (about 375,000 km²) and lies in the arid regionwith low annual rainfall and extremely high evaporation. In the studyarea, groundwater serves as the major source for agricultural activityand for domestic usages. A total of 295 groundwater samples collectedand were analyzed for physico-chemical parameters such ashydrogen ion concentration (pH), total dissolved solids (TDS) andelectrical conductivity (EC), sodium (Na+), potassium (K+), magnesium(Mg2+), and calcium (Ca2+) ,bicarbonate (HCO3) chloride(Cl−), sulfate (SO42−) and nitrate (NO3). The goal and challenge forthe statistical overview was to delineate chemical distributions ina complex, heterogeneous set of data spanning over a large geographicrange. After de-clustering to create a uniform spatial sample distributionwith 295 samples, histograms and quantile-quantile (Q-Q)plots were employed to delineate subpopulations that have coherentchemical affinities. The elements showing significantly higher positivecorrelation are: TDS with EC; Ca with EC, TDS; Mg and EC,TDS, Ca, K; Cl and EC, TDS, Mg, Na, Ca; SO4 and EC, TDS, Ca,Cl, Na, Mg. The distribution of major ions in the groundwater isNa+ > Ca++ > Mg++ > K+ and Cl− > SO4−2 > HCO3− > NO3−. Ionicabundance plot of alkalis with Ca and Mg is suggestive of mix typetrends of concentrations as evident by moderate correlation (r =0.57). About 60% of the total samples have alkalis abundance andrests have more Ca + Mg concentrations than alkalis. Taking bothresults of cluster tree and geochemical features of variables intoconsideration, the authors classify the elements into two major groups,the first includes TDS, Na, EC, Cl, Ca, SO4, and Mg, where therelationship within the group are strong. The second group includesK, HCO3, pH, and NO3. This group has close relationship with group1 demonstrate that, the increase in the concentration to some elementscould be the same. Some of the analyzed parameters approach anormal distribution, as both their skewnesses and kurtoses reachclose to “0”. The study revealed that, all of the element pairs exhibitpositive relations.