간행물
한국지구과학회지 KCI 등재 The Journal of The Korean Earth Science Society
- 발행기관 한국지구과학회
- 자료유형 학술지
- 간기 격월간
- ISSN 1225-6692 (Print)2287-4518 (Online)
- 수록기간 1979 ~ 2024
- 주제분류 자연과학 > 지구과학 자연과학 분류의 다른 간행물
- 십진분류KDC 450DDC 550
권호리스트/논문검색
제4권 제1호 (1983년 12월) 5건
1.
1983.12
구독 인증기관 무료, 개인회원 유료
The physical characteristics of the sedimentary rocks developed in the Gyeongsang basin have been studied based on the geophysical logs which include SP, single electrode resistance, gamma ray, density and caliper logs. The rock sequences penetrated by the borehole, located in the Namji area, are portions of the Chilgok Formation and Jinju Formation which are the base of the Hayang Group and the top of the Sindong Group respectively. Although five different rock types are described on the core log, the boundaries between such rocks are not clearly indicated on the geophysical logs. It is quite apparent that such poorly sorted sediments have non-marine origin and have been severely compacted and almost completely cemented through the diagenesis process. The gamma and SP logs show that the clay content of the formation slightly increases with depth. The organic rich black shale zone of 4m thickness is clearly identified on the gamma-ray log in the top part of the Jinju Formation. The bulk density determined from the density log is about 2.6g/㎤ and does not show much variation between different rock types. This value is close to the expected matrix density of the rock sequences and the rocks are appeared to have very low porosity. The resistivity curve also does not show any clear differences according to the described rock types. This fact also indicates that both shales and sandstones have been severely altered through the diagenesis. The low resistivity peaks and the corresponding large SP deflections are appeared against the fracture zones which are clearly identified on the caliper log. The dominance of such electrokinetic potential over the electrochemical potential also indicates that the permeability of the rocks is very poor.
4,000원
2.
1983.12
구독 인증기관 무료, 개인회원 유료
The instrumental earthquakes data during 1905∼1982 of the Korean Peninsula were investigated and analyzed. The annual average frequency is 5.7 events and the return period for all events is 0.18 year. In the pattern of annual frequency, the recent seismicity of the Korean Peninsula has tended to increase since 1975. Most earthquaked occurred in the southern and western part of the peninsula, and along the major geologic structure lines such as faults, fault lineaments and fold belts, especially in the NE-SW strike structure lines. Many earthquakes occurred at places where the Bouguer gravity anomaly is positive, especially in the high anomaly gradient considered as rock boundary. Over half (51.4%) of all events in land occurred in the Precambrian metamorphic rocks, which are granti-gneiss and crystalline schist system. And a tentative seismic zoning map is presented.
4,600원
3.
1983.12
구독 인증기관 무료, 개인회원 유료
This study aims to present an effective basic material and data for the future earth science education by analysizing earth science curriculum of Korean high school. The method used in this study is based on comparison and analysis of the related reference materials. The main subject of this study is to find the changing history of earth science curriculum and compare the Korean earth science curriculum revised in 1982 to the American and Japan curriculums. Based on these studies following suggestions are presented for the future earth science education; 1) The laboratory education in earth science should be more emphasized than lecture. 2) It is urgent need to publish laboratory manuals for students. 3) Well designed laboratory equipments and good quality kits of reasonable price should be supplied.
4,000원
4.
1983.12
구독 인증기관 무료, 개인회원 유료
本 硏究는 大氣大循環 過程에 나타나는 諸 現象들을 回轉流體의 實驗을 통해 나타내보임으로써 空間的인 난해한 槪念들을 학생들의 눈을 통해 직접 觀察하여 구체적으로 理解토록 했다. 回轉流體의 흐름을 可視化하고 溫度差와 回轉率에 따라 나타나는 여러 가지 유체의 운동을 觀察하며 大氣에서 나타나는 현상과 力學的으로 비교한다. Thermal Rossby number가 매우 크면(저회전 또는 큰 온도차) 熱帶에서 나타나는 Hadley 循環에 해당하는 원형의 흐름이 나타나고 이 값이 차츰 감소함에 따라(회전수 증가) 中緯度의 편서풍대에 나타나는 偏西風 波動이나 zet 氣流 등의 定常波에 해당하는 Rossby 循環의 흐름을 볼 수 있다. Thermal Rossby number가 더욱 감소하면 폐색된 低氣壓이나 高氣壓 등이 나타나며 低指數 循環에 해당하는 不規則한 흐름을 볼 수 있다. 이 실험을 통해 이러한 現象들이 또한 熱을 赤道로부터 高緯度로 운반하는 重要한 역할을 하게 됨을 알고 反射鏡과 回轉鏡 裝置를 開發함으로써 유체 흐름의 種類와 現象들을 靜止系에서 뚜렷하게 觀察할 수 있게 되어 敎育器材로서의 效能이 크다고 본다.
4,000원
5.
1983.12
구독 인증기관 무료, 개인회원 유료
A mount consists of two polarizing films at intervals of 2∼3㎜ and a rotatable thin-section holder inserted between two films. The mount is held into a slide projector. We can investigate and study optical characters of rocks and minerals by the projected figures in the same way as the polarizing microscope.
3,000원
