• Title/Summary/Keyword: continental collision, Yellow Sea, underground structure gravity, density

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3D Density Modelling of the Yellow Sea Sedimentary Basin

  • Choi, Sungchan
    • Journal of the Korean Geophysical Society
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    • v.7 no.4
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    • pp.283-291
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    • 2004
  • To find out the locus of the Quinling-Dabie-Sulu continental collision’s boundary and to estimate underground structure of the sedimentray basin in the Yellow Sea, three dimensional density modelling is carrid out by using gravity dataset (Free Air Anomaly), which is measured by Tamhae 2, KIGAM in a period between 2000 and 2002. The measured gravity anomaly in the investigations area is mainly responsed by depth and density differences between the sedimentary basin and the basement. The high density model-bodies extend mainly from the southern part of China to the middle-western part of the Korean Peninsula, which might be emplaced along the continental collision’s boundary. The total volume of the very low density model-bodies might be expected at about 20,000 km3 in the model area.

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Tectonic Link Between NE China, Yellow Sea and Korean Peninsula, Revealed by Interpreting CHAMP-GRACE Satellite Gravity Data and Sea-surface Measured Gravity Data (CHAMP-GRACE 인공위성 데이터와 해상 측정 중력 데이터에 나타난 황해안 지역의 남중국과 북중국판의 대륙 충돌대 위치)

  • Choi, Sung-Chan
    • Journal of the Korean Geophysical Society
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    • v.8 no.2
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    • pp.89-92
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    • 2005
  • For the understanding the locus of the Quinling-Dabie-Sulu continental collision’s boundary and the underground structure of the sedimentray basin in the Yellow Sea, three dimensional density modelling is carrid out by using gravity dataset (Free Air Anomaly), which is measured by Tamhae 2, GIGAM in a period 2000-2002. The measured gravity anomaly in the investigations area is mainly responsed by depth distribution of the sedimentary basin. After comparing the sea-measured gravity data to CHAMP-GRACE satellite gravity data, I suggested that the high density model bodies extend mainly from the southern part of China to the middle-western part of the Korean Peninsula, which might be emplaced along the continental collision’s boundary. The total volume of very low density bodies modified by modelling might be about 20 000 km3.

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Tectonic Link between NE China, Yellow Sea and Korean Peninsula, revealed by interpreting CHAMP-GRACE satellite Gravity Data and sea-surface measured gravity data (CHAMP-GRACE 인공위성 데이터와 해상 측정 중력 데이터에 나타난 황해안 지역의 남중국과 북중국판의 대륙 충돌대 위치)

  • Cho, Sung-Chan
    • 한국지구물리탐사학회:학술대회논문집
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    • 2005.05a
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    • pp.9-14
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    • 2005
  • For the understanding the locus of the Quinling-Dabie-Sulu continental collision's boundary and the underground structure of the sedimentray basin in the Yellow Sea, three dimensional density modelling is carrid out by using gravity dataset (Free Air Anomaly), which is measured by Tamhae 2, KIGAM in a period 2000 - 2002. The measured gravity anomaly in the investigations area is mainly responsed by depth distribution of the sedimentary basin. After comparing the sea-measured gravity data to CHAMP-GRACE satellite gravity data, I suggested that the high density model bodies extend mainly from the southern part of China to the middle-western part of the Korean Peninsula., which might be emplaced along the continental collision's boundary. The total volume of very low density bodies modified by modelling might be about $20000\;km^3$.

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