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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean earth science society
Journal Basic Information
Journal DOI :
The Korean Earth Science Society
Editor in Chief :
Volume & Issues
Volume 34, Issue 7 - Dec 2013
Volume 34, Issue 6 - Oct 2013
Volume 34, Issue 5 - Sep 2013
Volume 34, Issue 4 - Aug 2013
Volume 34, Issue 3 - Jun 2013
Volume 34, Issue 2 - Apr 2013
Volume 34, Issue 1 - Feb 2013
Selecting the target year
Petrochemical Characteristics of the Duibaejae Volcanic Rocks from Goseong, Gangwon-do, Korea
Kim, Hwa Sung ; Kil, Youngwoo ; Lee, Moon Won ;
Journal of the Korean earth science society, volume 34, issue 2, 2013, Pages 109~119
DOI : 10.5467/JKESS.2013.34.2.109
Duibaejae basalts from Goseong, Gangwon-do, are divided into the lower basalt and the upper basalt depending on the properties, such as occurrence, mineral compositions, and major and trace compositions of the basalts. The lower basalts have characteristics of agglomerate rocks as well as contain, crustal and mantle xenoliths, and olivine, pyroxene, and plagioclase xenocrysts. The upper basalts with columnar joints contain relatively more mantle xenolith and olivine xenocryst than the lower basalts. The major and trace element compositions suggest that the composition of the upper basalts is close to primary magma composition. Enrichment and depletion patterns of the trace and the rare-earth elements of the lower basalts are similar to those of the upper basalts, whereas the lower basalts are more LREE enriched than the upper basalts. The source magmas of the lower and upper basalts from Duibaejae volcanic edifice were generated from about 0.8-1.2% and 3.7-4.0% batch melting of garnet peridotite, respectively. The abundance of granite xenolith, and plagioclase and quartz xenocrysts with reaction rim indicates that the lower basalts, compared with upper basalts, might have been assimilated with the crustal materials during ascending to surface.
Variations of Sediment Textural Parameters and Topography around Gangneung Harbor after the Completion of Harbor Construction
Oh, Jae-Kyung ; Bang, Ki-Young ;
Journal of the Korean earth science society, volume 34, issue 2, 2013, Pages 120~135
DOI : 10.5467/JKESS.2013.34.2.120
To investigate the changes in depositional environment around Gangneung Harbor, we analyzed the surface sediment textural parameters and topography data collected five times from February 2007 to February 2009. In the study area, sediments were mainly composed of sand and its sediment size became finer at offshore sites. During summer time, however, the sand grains became coarser than winter season near Namhangjin Beach, inside the harbor, and offshore areas. On the other hand, the grain size of Anmok Beach showed a gradual finer trend with time. Compared with the previous studies conducted before the completion of Gangneung Harbor construction, the mean grain size became finer on Anmok Beach, while it was coarser on Namhangjin Beach. The bathymetric changes observed over a 2-year period showed predominant erosion in the area of 5 to 10 m water depths and deposition in 2 to 5 m water depths. The shallower area less than 2 m water depths showed an alternating trend and yet slightly more dominant erosion process. The sediment textural parameters and the distribution of erosion and deposition have changed continuously. Results imply that such changes show long-term trends as well as seasonal variations in which the trend may have been formed after the completion of Gangneung Harbor construction.
Relationship between rainfall in Korea and Antarctic Oscillation in June
Choi, Ki Seon ; Kim, Baek Jo ; Lee, Jong Ho ;
Journal of the Korean earth science society, volume 34, issue 2, 2013, Pages 136~147
DOI : 10.5467/JKESS.2013.34.2.136
This study examined the effect of the Antarctic Oscillation (AAO) in June on the June rainfall in Korea by using a correlational statistical analysis. Results showed that there is a highly positive correlation between the two variables. In other words, the June rainfall in Korea is influenced by the Mascarene High and Australian High that are strengthened in the Southern Hemisphere, which is a typical positive AAO pattern. When these two anomalous pressure systems strengthen, the cold cross-equatorial flows in the direction from the region around Australia to the equator are intensified, which in turn, force a western North Pacific subtropical high (WNPSH) to develop northward. This pressure development eventually drives the rain belt to head north. As a result, the Changma begins early in the positive AAO phase and the June rainfall increases in Korea. In addition, a WNPSH that develops more northward increases the landfall (or affecting) frequency of tropical cyclones in Korea, which plays an important role in increasing the June rainfall.
Communication Status in Group and Semantic Network of Science Gifted Students in Small Group Activity
Chung, Duk Ho ; Cho, Kyu Seong ; Yoo, Dae Young ;
Journal of the Korean earth science society, volume 34, issue 2, 2013, Pages 148~161
DOI : 10.5467/JKESS.2013.34.2.148
The purpose of the study was to investigate the relationship between the communication status in group and the semantic network of science gifted students. Seven small groups, 5 members in each, participated in small group activities, in which they discussed the calculation of earth density. Both the communication status in group and the semantic network of science gifted students were analyzed using KrKwic, Ucinet 6.0 for Windows. As a result, the semantic network of prime movers in group represented more frequently used words, lesser rate of component, and higher density than that of out lookers. It means that the prime movers have coherent knowledge compared to out lookers, and they output more knowledge for problem solving than out lookers. Therefore, the results of this study may be applied to evaluating the cognitive level of science gifted students and group organization for small group activity.
The Effects of Flash Panorama-based Virtual Field Trips on Middle School Students' Spatial Visualization Ability, Conceptual Understanding, and Perceptions
Lee, Ki-Young ;
Journal of the Korean earth science society, volume 34, issue 2, 2013, Pages 162~172
DOI : 10.5467/JKESS.2013.34.2.162
The purpose of this study is to investigate the effects of flash panorama-based virtual field trips (VFT) as a supporting tool for geological field activity on middle school students' spatial visualization ability, conceptual understanding, and perceptions. A total of 17 middle school students participated in a three day long actual geological field trip around Jeju Island where a three-phase instructional model is applied for utilization of flash panorama-based VFT, which was proposed by Kim and Lee (2011). With one-group pretest-posttest pre-experimental design, data were collected using questionnaire and were analyzed to find out a change in students' spatial visualization ability and volcanic concept understanding, and their perceptions about the utilization of flash panorama-based VFT. Findings are as follows: First, the effect of utilizing flash panorama-based VFT in actual field trip revealed that there was meaningful increase in 'spatial relation' category of spatial visualization ability and 'knowledge' and 'comprehension' domains of volcanic concept understanding. Second, majority of students showed positive gain index in both spatial visualization ability and volcanic concept understanding. Lastly, participating students showed much interest and high satisfaction, and positive perception on the use of VFT. They also perceived that the utilization of flash panorama-based VFT could help in carrying out an actual field trip in terms of cognitive and geographical factors.
An Analysis of the Changes of High School Students' Conceptual Structure about Sedimentary Rocks before and after the Field Trip using the Semantic Network Analysis
Park, Kyeong Jin ; Chung, Duk Ho ; Cho, Kyu Seong ;
Journal of the Korean earth science society, volume 34, issue 2, 2013, Pages 173~186
DOI : 10.5467/JKESS.2013.34.2.173
The purpose of the study was to investigate the change of students' conceptual structures about sedimentary rocks through the field trip. A semantic network analysis method was utilized to assess the change. An open-ended questionnaire was developed to assess high school students' knowledge of sedimentary rock including its definition, classification, formation process, and characteristics. Fifteen high school students participated in the field trip of this study. The text data were analyzed using the semantic network analysis method. Results are as follows. First, high school students' conceptual structures about sedimentary rocks were more expanded after the field trip. Second, students' conceptual structures formed a 'small world network' by combining the sub-clusters. Third, the size of students' conceptual structures was decreased after a few month of field trip. Nonetheless, the connection among the clusters remained the same.