• Title/Summary/Keyword: 선상구조

Search Result 146, Processing Time 0.028 seconds

WNW Trending Lineament and Criteria of Left-Lateral Displacement Around Haman-Uiryeong, Korea (함안-의령 일대 서북서 방향의 선상구조와 좌향이동 지시자)

  • Ryoo, Chung-Ryul;Kim, Jong-Sun;Lee, Han-Yeang
    • Economic and Environmental Geology
    • /
    • v.41 no.4
    • /
    • pp.465-468
    • /
    • 2008
  • Two half circular structures are developed in the northern and southern blocks which divided by the WNW-trending lineament around Uiryeong-Haman area, southern part of the Gyeongsang basin. By displacing one half circular structure to the other one about 750 m, a perfect circular structure is reconstructed. Thus the WNW-trending lineament is a left-lateral fault displacing the circular structure. The NNW trending ridges are dragged with anticlockwise sense near the WNW-trending fault, which indicates also the existence of a sinistral movement.

Characteristics of Lineament and Fracture System in the North-eastern Area of Yosu Peninsula (여수반도 북동부지역의 선상구조와 단열계 분포특성)

  • 김경수;이은용;김천수
    • The Journal of Engineering Geology
    • /
    • v.9 no.1
    • /
    • pp.31-43
    • /
    • 1999
  • This study aims to quantify the distribution characteristics of the fracture system for the numerical modeling of groundwater flow in the north-eastern area of Yosu peninsula. The study area is composed mainly of volcanic rocks and granite. The regional and site scale lineament in the range of magnitude Order 1 to Order 3 were analyzed from the geologic map, air-photograph and shaded relief map. The geometric parameter of Order 4 fracture system was acquired from the scanline survey on the ground surface. There is a similar trend in the preferred orientation between the regional lineament and the Order 4 fracture system except the Set 4 of Order 4 fracture system which is not prominent in the type. That is classified to three fracture sat of high dip angle and one of ow dip angle. From the lineament trend. The orientation of Order 4 fracture system has similar characteristics in each rock termination mode analysis, it is considered that the fracture system was developed systematically and sequentially from Set 1 to Set 4 Filling materials are distinct relatively in low dip angle set. The fracture spacing follows to lognoral distribution and the fracture frequency corrected by the modified Terzaghi correction ranges from 0.38 to 1.01 per mater in each fracture set. The fracture trace lenght also follows to lognormal distribution and ranges from 2.9m to 3.7m in each fracture set.

  • PDF

Suhplasmalemmal Linear Density -A possible morphologic mesodermal marker- (세포막하 선상구조 - 중배엽 기원세포의 미세구조적 표지로서의 의의 -)

  • Kwon, Tae-Jung
    • Applied Microscopy
    • /
    • v.19 no.1
    • /
    • pp.19-26
    • /
    • 1989
  • Subplamalemmal linear densities (SLD) consist of a thin layer of electron dense material immediately subjacent to the inner leaflet of the palsma membrane. Short segments of extracellualr basal lamina-like material or collagen fibers usually overlie them. SLD has been considered to be a possible morphologic maker of cells of mesodermal origin. The present study confirms the fact that SLD may be of value in the diagnosis of mesodermal or mesenchymal tumor.

  • PDF

The Distribution and Geomorphic Development of Alluvial Fans along the Bulguksa Fault System in Gyeongju and Ulsan City, Southeastern Korea (한국 남동부 경주 및 울산시 불국사단층선 지역의 선상지 분포와 지형발달)

  • 황상일;윤순옥
    • Journal of the Korean Geographical Society
    • /
    • v.36 no.3
    • /
    • pp.217-232
    • /
    • 2001
  • One of the molt debatable Issues on geomorphological study in Korea should be the discussion over the formation process of gent1e slope surfaces on the piedmont area. In this study, the characteristics of spatial distribution and the formation process of geomorphic surfaces were investigated by classifying the alluvial fans as three geomorphic surfaces alluvial the Bulguksa fault-line The fan surfaces, distributed along the west slue of Bulguksa Mts, consists the confluent alluvial fans continuously along the N-S direction The surfaces of Sincheon-Hyomun district juxtaposed to the Ulsan Bay must be infulenced by sea-level chance during the Quaternary Taken together, these observation suggests that the major four factors contributed to the fan formation 1) rather longer freeze-and-thaw cycle during the Glacial period. 2) the steep mountain slope along the west side of Bulguksa Mts.. which had been resulted from the horizont stress of EAst Sea 3)the tectolinear fault system developed by structural movement along the Bulguksa Fault-line valley. and 4) the erosion-labile characteristics of bedrock In this urea which is consisted of the Bulguksa granite and the sedimentary rock formed in Cretaceous period.

  • PDF

The Geomorphic Development of Alluvial Fans in the Cyeongju City and Cheonbuk area, Southeastern Korea (경주 및 천북 지역의 선상지 지형발달)

  • 윤순옥;황상일
    • Journal of the Korean Geographical Society
    • /
    • v.39 no.1
    • /
    • pp.56-69
    • /
    • 2004
  • We investigated the distribution and geomorphic development of alluvial fan in Gyeongju City including Cheonbuk area. According to a relative height to a river bed, alluvial fans of this area are divided into Higher surface, Middle surface, and Lower surface. As alluvial fans of Bulguk temple∼Ulsan bay area, the confluent fans in Cheonbuk and Gyeongju areas were formed by the Quaternary climatic change alternating glacial and interglacial stages, and the development of N-S and NW-SE fault lines. The Gyeongju alluvial fan, the largest in Korea, has been provided as the significant space for human activity since the prehistoric age. Bukcheon river formed the Gyeongju alluvial fan had not flowed over during the prehistoric and the ancient times. In contrast with general geomorphic characteristics, many springs in the Gyeongju alluvial fan are located in the middle part of the fan because ground water reaches to the surface. It is supposed that sedimental materials were not sufficiently piled up at lower reach of Bukcheon river due to the large deposits at upper and middle reach of the basin.