Preliminary crustal movement study around the Honam shear zone and Okchon Belt (South Korea) using GPS observations

Hamdy, Ahmed M.; Park, Pil-Ho; Jo, Bong Gon

doi:10.1007/bf02910284

Cited by 6 publications

(3 citation statements)

References 15 publications

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“…On the other hand, the Korean GPS Network (KGN), which consists of 50 permanent GPS stations constructed on geologically stable marks (pillars), only became fully operational in 2000. However, since this time, our knowledge on the crustal deformation in the Korean peninsula and its adjacent areas has been improved (Park et al, 2001;Hamdy et al, 2004a, b;2005). Mäkinen et al (2003) claimed that two leveling surveys taken at a 40-year interval would provide accurate vertical velocities of 0.3 mm/year (by assuming white noise, a precision≥0.8 mm/ √ km, and a distance of 100 km).…”

Section: Introductionmentioning

confidence: 99%

Vertical velocity from the Korean GPS Network (2000–2003) and its role in the South Korean neo-tectonics

Hamdy

Park

2007

Earth Planet Sp

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In the absence of adequate leveling observations in South Korea, the vertical deformation has been investigated using the Korean Global Positioning System (GPS) Network data (2000)(2001)(2002)(2003). Although the vertical components of the GPS velocities have been rarely used in crustal deformation studies because of their high noise level, the processing strategy employed here enhances the data quality and eliminates the seasonal effect. The obtained vertical velocity field shows that the maximum vertical velocity in the ITRF 97 reference frame is 3.3 mm/year (subsidence), which reflects a relatively low level of seismic activity in South Korea. Two deformation patterns were recognized; subsidence in the Okchun Basin, and uplift in its adjacent areas. This subsidence is due to the collision of Kyonggi Massif and Okchun Basin (part of the South China block) against the Yongnam Massif and Taebaeksan Basin (part of the North China block).

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Section: Introductionmentioning

confidence: 99%

Vertical velocity from the Korean GPS Network (2000–2003) and its role in the South Korean neo-tectonics

Hamdy

Park

2007

Earth Planet Sp

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“…In spite of such a difficulty, several studies have been recently done, e.g. Park et al (2001) and Hamdy et al (2004).…”

Section: Introductionmentioning

confidence: 99%

Horizontal deformation in South Korea from permanent GPS network data, 2000–2003

2005

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Analysis of continuous GPS data [2000][2001][2002][2003] at 50 stations of the Korean GPS Network (KGN) suggests that the southern part of the Korean peninsula is tectonically more stable than other regions in the Eastern Asia. The average velocity was ∼1.5 mm/yr and the average overall strain rate was around −0.3 × 10 −9 str/yr. The obtained velocity field indicates the presence of anticlockwise rotation of the whole region with respect to Daejeon station (DAEJ), in the central part of South Korea. It also showed that KM-OB (Kyonggi Massif and the Okchon Basin) and YM-TB (Yeongnam Massif and Taebaeksan Basin) have left-lateral shearing movements. Both movements were confirmed by the deformation analysis of the KGN horizontal velocity field using the infinitesimal plate theory. The results show that South Korea moves toward the WNW direction with a velocity of 0.9 mm/yr with a slow anticlockwise rotation. The strain field in South Korea indicates the existence of both compression and tension. The compression and extension axes have WSW-EWE and NNW-SSE directions, respectively.

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“…Many more volcanic centres are buried or submerged. Jeju Island is surrounded by c. 100 metres-deep water [57] on the continental shelf of the Amurian Plate [58][59][60], which is the same plate as the rest of the Korean peninsula. An overall WSW-ENE compressional and NNW-SSE extensional regime exists in the southern part of the Korean peninsula [58][59][60], and this has been suggested for Jeju in order to explain volcanic centres alignments [61] however, such alignments are not as prominent as at PAVF.…”

Section: Jeju Island Koreamentioning

confidence: 99%

Modern analogues for Miocene to Pleistocene alkali basaltic phreatomagmatic fields in the Pannonian Basin: “soft-substrate” to “combined” aquifer controlled phreatomagmatism in intraplate volcanic fields Research Article

et al. 2010

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Abstract:The Pannonian Basin (Central Europe) hosts numerous alkali basaltic volcanic fields in an area similar to 200 000 km 2 . These volcanic fields were formed in an approximate time span of 8 million years producing smallvolume volcanoes typically considered to be monogenetic. Polycyclic monogenetic volcanic complexes are also common in each field however. The original morphology of volcanic landforms, especially phreatomagmatic volcanoes, is commonly modified. by erosion, commonly aided by tectonic uplift. The phreatomagmatic volcanoes eroded to the level of their sub-surface architecture expose crater to conduit filling as well as diatreme facies of pyroclastic rock assemblages. Uncertainties due to the strong erosion influenced by tectonic uplifts, fast and broad climatic changes, vegetation cover variations, and rapidly changing fluvio-lacustrine events in the past 8 million years in the Pannonian Basin have created a need to reconstruct and visualise the paleoenvironment into which the monogenetic volcanoes erupted. Here phreatomagmatic volcanic fields of the Miocene to Pleistocene western Hungarian alkali basaltic province have been selected and compared with modern phreatomagmatic fields. It has been concluded that the Auckland Volcanic Field (AVF) in New Zealand could be viewed as a prime modern analogue for the western Hungarian phreatomagmatic fields by sharing similarities in their pyroclastic successions textures such as pyroclast morphology, type, juvenile particle ratio to accidental lithics. Beside the AVF two other, morphologically more modified volcanic fields (Pali Aike, Argentina and Jeju, Korea) show similar features to the western Hungarian examples, highlighting issues such as preservation potential of pyroclastic successions of phreatomagmatic volcanoes.

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Preliminary crustal movement study around the Honam shear zone and Okchon Belt (South Korea) using GPS observations

Cited by 6 publications

References 15 publications

Vertical velocity from the Korean GPS Network (2000–2003) and its role in the South Korean neo-tectonics

Vertical velocity from the Korean GPS Network (2000–2003) and its role in the South Korean neo-tectonics

Horizontal deformation in South Korea from permanent GPS network data, 2000–2003

Modern analogues for Miocene to Pleistocene alkali basaltic phreatomagmatic fields in the Pannonian Basin: “soft-substrate” to “combined” aquifer controlled phreatomagmatism in intraplate volcanic fields Research Article

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