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具聖本 慶北大學校 自然科學大學 地質學科 地質學硏究會 1983 伏賢地質 Vol.- No.7
Physical properties in 21 representative sandstones of the Gyeongsang Supergroup have been studied in the laboratory,. For the purpose of this study, density, porosity, saturation moisture content, compressional wave(P-wave) and shear wave(S-wave) velocity were measured. Elastic moduli was calculated by P-wave and S-wave velocity. The ratio of P-wave to S-wave and the effect of water saturation on velocity were evaluated. The results of this study are summarized as follows. : Sandstones of the Gyeongsang Super-group range in density from 2.45 to 2.68 g/㎤, in porosity from 0.55 to 5.47%,in saturation moisture content 0.20 to 2.25%. In grain size,density is higher in coarse grained than in fine grained, and porosity and saturation moisture content is higher in fine grained than in coarse grained. Elastic wave velocity varies in P-wave from 3,050 to 4,450m/sec, in S-wave from 1,650 to 2,870 m/sec.Also wave velocity is higher in coarse grained than in fine grained sandstones. V_p/V_s is between 1.41 and 1.85, the value less than 2.0 is characteristic of well consolidated sandstones. Use of V_p/V_s has the additional advantage of density information. It is observed that water saturation increases the P-wave velocity considerably, in some cases as high as 30% if compared with dry state. The range of Poisson's ratio varies from 0.05 to 0.29 and Young's modulus 1.77×10 exp (5) ㎏/㎠ to 5.17×10 exp (5) ㎏/㎠. Rigidity modulus range from 0.69×10 exp (5) ㎏/㎠ to 2.27×10 exp (5) ㎏/㎝. The elastic moduli increases as the P-wave velocity increases but Poisson's ratio is an exception. Physical properties of sandstones of Gyeongsang Supergroup seem to be caused by depositional environments, but not caused by time (stratigraphy) and space (geography).
제주 동부지역 Coastal aquifer에 대한 고찰
조진동,성낙훈,구성본 忠南大學校 環境問題硏究所 1990 環境硏究 Vol.8 No.-
This study carried out resistivity sounding (77 points), in-situ rock resistivity measurement(4 points) and fluid column log(1 hole) to investigate the coastal aquifer in the eastern part of Cheju area. Apparent resistivity distribution showing irregular boundary between fresh and saline water, Ghyben-Herzberg relation couldn't apply to this area in hydrology. Therefore, in case of exploitation using the relation, coastal aquifer will be happened to be intruded of saline water.
항공자력의 Analytical 이상을 이용한 의성소분지의 지구조 연구
김원균,민경덕,김정우,원중선,박찬홍,구성본 대한자원환경지질학회 2000 자원환경지질 Vol.33 No.3
The structure of Euiseong Sub-basin and boundary of sub-basins were examined by analytical aeromagentci anomaly data. Magnetic lineaments have trends of NE-SW, NWW-SEE and NEE-SWW. The NE-SW lineaments in the sedimentary formations and pre-Cretaceous basement are assoicated with the direction of expansion of basin and the lineaments in the volcanic rocks and intrusives indicate the direction of structural weakness ones such as fault, which were major gateways of igneous activities. Euiseong Subbasin is bounded by pre-existing Andong Fault, pre-Cretaceous basement in the west, NE-SW lineament from Jyungsan to Angang, and NW-SE lineament connecting southwestern boundary of Palgongsan Granite and Jeokje Fault. In particular , the NW-SE lineament , which caused upheavel of pre-Cretaceous rocks, on Jeokje Fault is inferred as a boundary between Euiseong and Milyang Sub-basins.