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Dong Geun Yoo - One of the best experts on this subject based on the ideXlab platform.
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stratigraphy of late Quaternary Deposits using high resolution seismic profile in the southeastern yellow sea
Quaternary International, 2014Co-Authors: Gwang Soo Lee, Daechoul Kim, Dong Geun YooAbstract:Abstract High-resolution (Chirp and Sparker system) seismic profiles were analyzed to investigate the sequence stratigraphy of late Quaternary Deposits in the southeastern Yellow Sea. Approximately 1560 line-km data of chirp and sparker profiles were acquired, together with 11 piston cores. Two previous long drill cores (YSDP-102 and 103) were used for comparison with seismic data. High-resolution seismic profiles image the Holocene mud Deposits and the complex sedimentary structure in this area. Sequence analysis of high-resolution seismic profiles reveals that the shelf Deposits form a succession of high-frequency (five-order) sequences consisting of one depositional sequence developed during the late Quaternary. The depositional sequence includes five sedimentary units, each with different seismic facies and geometry: (1) incised channel fill and lowstand deltaic wedge (unit SY1), (2) sand ridges (unit SY2), (3) estuarine/deltaic mud (unit SY3), (4) redeposited mud (unit SY4), and (5) recent distal mud (unit SY5). Based on the interpretation of high-resolution seismic records and correlation with the YSDP-102, 103 long cores and piston cores, late Quaternary Deposits in the southeastern Yellow Sea consists of a set of the lowstand (unit SY1), early transgressive (unit SY2), middle transgressive (unit SY3), late transgressive (unit SY4), and highstand systems tract (unit SY5) formed since the last-glacial period. The rather unusual stratigraphic architecture including three systems tracts is largely controlled by the postglacial sea-level changes and regionally circulation pattern associated with sediment erosion and redeposition. The results of this study present firstly clear seismic evidence that the southeastern Yellow Sea mud belt (SEYSM) can be divided into three stratigraphic units (units SY3, SY4, and SY5) bounded by distinct bounding surfaces.
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sedimentary environment and sequence stratigraphy of late Quaternary Deposits in the east china sea
Marine Georesources & Geotechnology, 2013Co-Authors: Gwang Soo Lee, Daechoul Kim, Dong Geun YooAbstract:High-resolution (Chirp and Sparker system) seismic profiles were analyzed to investigate the sedimentary environment and sequence stratigraphy of the late Quaternary Deposits in the East China Sea. Echo types in the study are divided into three major echo types which are classified as flat (transgressive sediment sheets, relict sands, and Holocene muds), mounded (tidal ridges), and irregular echoes (channels). Sequence analysis of high-resolution seismic profiles reveals that the shelf Deposits form a succession of high-frequency (fifth-order) sequences consisting of three depositional sequences (DI, DII, and DIII) developed during the late Quaternary. The depositional sequence includes five sedimentary units, each with different seismic facies and geometry: (1) regressive estuarine/deltaic wedge (unit J1), (2) regressive deltaic/offshore Deposits (unit J2), (3) low-stand deltaic wedge with incised-channel fill (unit J3), (4) transgressive estuarine/deltaic complex (unit J4-a) and sand ridges/sheet (unit ...
Gwang Soo Lee - One of the best experts on this subject based on the ideXlab platform.
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stratigraphy of late Quaternary Deposits using high resolution seismic profile in the southeastern yellow sea
Quaternary International, 2014Co-Authors: Gwang Soo Lee, Daechoul Kim, Dong Geun YooAbstract:Abstract High-resolution (Chirp and Sparker system) seismic profiles were analyzed to investigate the sequence stratigraphy of late Quaternary Deposits in the southeastern Yellow Sea. Approximately 1560 line-km data of chirp and sparker profiles were acquired, together with 11 piston cores. Two previous long drill cores (YSDP-102 and 103) were used for comparison with seismic data. High-resolution seismic profiles image the Holocene mud Deposits and the complex sedimentary structure in this area. Sequence analysis of high-resolution seismic profiles reveals that the shelf Deposits form a succession of high-frequency (five-order) sequences consisting of one depositional sequence developed during the late Quaternary. The depositional sequence includes five sedimentary units, each with different seismic facies and geometry: (1) incised channel fill and lowstand deltaic wedge (unit SY1), (2) sand ridges (unit SY2), (3) estuarine/deltaic mud (unit SY3), (4) redeposited mud (unit SY4), and (5) recent distal mud (unit SY5). Based on the interpretation of high-resolution seismic records and correlation with the YSDP-102, 103 long cores and piston cores, late Quaternary Deposits in the southeastern Yellow Sea consists of a set of the lowstand (unit SY1), early transgressive (unit SY2), middle transgressive (unit SY3), late transgressive (unit SY4), and highstand systems tract (unit SY5) formed since the last-glacial period. The rather unusual stratigraphic architecture including three systems tracts is largely controlled by the postglacial sea-level changes and regionally circulation pattern associated with sediment erosion and redeposition. The results of this study present firstly clear seismic evidence that the southeastern Yellow Sea mud belt (SEYSM) can be divided into three stratigraphic units (units SY3, SY4, and SY5) bounded by distinct bounding surfaces.
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Sequence Stratigraphy of Late Quaternary Deposits in the Southeastern Yellow Sea of Korea
Springer Geology, 2014Co-Authors: Daechoul Kim, Gwang Soo Lee, Sung Ho Bae, Seong Pil Kim, Kap Sik JeongAbstract:High-resolution seismic profiles were analysed to investigate the sequence stratigraphy of late Quaternary Deposits in the southeastern Yellow Sea of Korea. Approximately 1500 line-km data of chirp and sparker profiles were acquired. We also used deep drill cores to interpret the sedimentary sequence. High-resolution seismic profiles reveal the Holocene mud Deposits and the complex sedimentary structure. The late Quaternary Deposits in the study area can be divided into four sedimentary units (units A, B, C, and D from oldest to youngest) bounded by an erosional surface and internal seismic reflector: (1) incised channel fill/lowstand deltaic wedge (unit A); (2) transgressive sand ridges and sand sheets (unit B); (3) estuarine/deltaic or shallow-water mud (unit C); and (4) distal mud patch (unit D). Unit C is divided into two sedimentary subunits on the basis of high amplitude and unconformity: (i) estuarine/deltaic mud (unit C-a); and (ii) mud redeposited by sea-level rise and strong tidal currents (unit C-b). The evolution of units C-a and C-b is closely related to postglacial sea-level changes, sediment erosion, and reworking. These late Quaternary Deposits have been controlled by sea-level change, tidal currents, and sediment erosion.
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sedimentary environment and sequence stratigraphy of late Quaternary Deposits in the east china sea
Marine Georesources & Geotechnology, 2013Co-Authors: Gwang Soo Lee, Daechoul Kim, Dong Geun YooAbstract:High-resolution (Chirp and Sparker system) seismic profiles were analyzed to investigate the sedimentary environment and sequence stratigraphy of the late Quaternary Deposits in the East China Sea. Echo types in the study are divided into three major echo types which are classified as flat (transgressive sediment sheets, relict sands, and Holocene muds), mounded (tidal ridges), and irregular echoes (channels). Sequence analysis of high-resolution seismic profiles reveals that the shelf Deposits form a succession of high-frequency (fifth-order) sequences consisting of three depositional sequences (DI, DII, and DIII) developed during the late Quaternary. The depositional sequence includes five sedimentary units, each with different seismic facies and geometry: (1) regressive estuarine/deltaic wedge (unit J1), (2) regressive deltaic/offshore Deposits (unit J2), (3) low-stand deltaic wedge with incised-channel fill (unit J3), (4) transgressive estuarine/deltaic complex (unit J4-a) and sand ridges/sheet (unit ...
Holger Lykke-andersen - One of the best experts on this subject based on the ideXlab platform.
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Thickness of Quaternary Deposits and their relation to the pre-Quaternary in the Fennoscandian border zone in Kattegat and Vendsyssel
Boreas, 2008Co-Authors: Holger Lykke-andersenAbstract:Refraction seismic measurements from Kattegat have been analysed for information about Quaternary Deposits. Preliminary results show a gradual increase in thickness of the Quaternary Deposits from about 50m in the SW to 150–250m in the NE, close to the Swedish coast. A number of narrow zones with extraordinarily great thickness are superimposed on this surface. Comparisons with structural features in the pre-Quaternary, as known from reflection seismic investigations, strongly indicate that the ‘Kattegat Basin’ is a structural phenomenon generated by subsidence under tensional stress perpendicular to the Fennoscandian border zone. Stratigraphical analysis which is available from wells on the islands in Kattegat and in Vendsyssel shows that subsidence of the ‘Kattegat Basin’ was initiated in Holstein or earlier.
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Dislocated Quaternary Deposits in southeastern Kattegat – a glacial or gravitational phenomenon?
Boreas, 2008Co-Authors: Thomas Vangkilde-pedersen, Holger Lykke-andersen, Gustaf LindAbstract:The Quaternary Deposits in the Store Middelgrund–Rordebanke area midway between the island of Anholt and Hallandsasen on the Swedish coast are described on the basis of reflection seismic profiles with a vertical resolution of 5–10 m. The Quaternary rests on Upper Cretaceous limestone, the surface of which is nearly horizontal. Three Quaternary sequences are defined and interpreted as: (1) Late Weichselian marine or lacustrine Deposits, (2) Late Weichselian glaciogenic Deposits, and (3) Late Saalian–Eemian and Early–Middle Weichselian Deposits. Sequence 3 is probably comparable to the upwards-coarsening sequence known from Skaerumhede in Vendsyssel. The layers in sequence 3 are dislocated in the eastern part of the Store Middelgrund–Rodebanke area mainly by gentle folding, but other types of deformations occur. Folding could be the result of horizontal push from an ice sheet approaching from the east. Alternatively the folding is an effect of vertical, gravitational forces acting on the sediments due to an unstable density profile, as described by the Rayleigh–Taylor instability model. The zone of deformation is located close to the northern flank of the tectonically active Sorgenfrei–Tornquist Zone. It is suggested that the initiation of the folding process was facilitated by tremors from small earthquakes.
Daechoul Kim - One of the best experts on this subject based on the ideXlab platform.
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stratigraphy of late Quaternary Deposits using high resolution seismic profile in the southeastern yellow sea
Quaternary International, 2014Co-Authors: Gwang Soo Lee, Daechoul Kim, Dong Geun YooAbstract:Abstract High-resolution (Chirp and Sparker system) seismic profiles were analyzed to investigate the sequence stratigraphy of late Quaternary Deposits in the southeastern Yellow Sea. Approximately 1560 line-km data of chirp and sparker profiles were acquired, together with 11 piston cores. Two previous long drill cores (YSDP-102 and 103) were used for comparison with seismic data. High-resolution seismic profiles image the Holocene mud Deposits and the complex sedimentary structure in this area. Sequence analysis of high-resolution seismic profiles reveals that the shelf Deposits form a succession of high-frequency (five-order) sequences consisting of one depositional sequence developed during the late Quaternary. The depositional sequence includes five sedimentary units, each with different seismic facies and geometry: (1) incised channel fill and lowstand deltaic wedge (unit SY1), (2) sand ridges (unit SY2), (3) estuarine/deltaic mud (unit SY3), (4) redeposited mud (unit SY4), and (5) recent distal mud (unit SY5). Based on the interpretation of high-resolution seismic records and correlation with the YSDP-102, 103 long cores and piston cores, late Quaternary Deposits in the southeastern Yellow Sea consists of a set of the lowstand (unit SY1), early transgressive (unit SY2), middle transgressive (unit SY3), late transgressive (unit SY4), and highstand systems tract (unit SY5) formed since the last-glacial period. The rather unusual stratigraphic architecture including three systems tracts is largely controlled by the postglacial sea-level changes and regionally circulation pattern associated with sediment erosion and redeposition. The results of this study present firstly clear seismic evidence that the southeastern Yellow Sea mud belt (SEYSM) can be divided into three stratigraphic units (units SY3, SY4, and SY5) bounded by distinct bounding surfaces.
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Sequence Stratigraphy of Late Quaternary Deposits in the Southeastern Yellow Sea of Korea
Springer Geology, 2014Co-Authors: Daechoul Kim, Gwang Soo Lee, Sung Ho Bae, Seong Pil Kim, Kap Sik JeongAbstract:High-resolution seismic profiles were analysed to investigate the sequence stratigraphy of late Quaternary Deposits in the southeastern Yellow Sea of Korea. Approximately 1500 line-km data of chirp and sparker profiles were acquired. We also used deep drill cores to interpret the sedimentary sequence. High-resolution seismic profiles reveal the Holocene mud Deposits and the complex sedimentary structure. The late Quaternary Deposits in the study area can be divided into four sedimentary units (units A, B, C, and D from oldest to youngest) bounded by an erosional surface and internal seismic reflector: (1) incised channel fill/lowstand deltaic wedge (unit A); (2) transgressive sand ridges and sand sheets (unit B); (3) estuarine/deltaic or shallow-water mud (unit C); and (4) distal mud patch (unit D). Unit C is divided into two sedimentary subunits on the basis of high amplitude and unconformity: (i) estuarine/deltaic mud (unit C-a); and (ii) mud redeposited by sea-level rise and strong tidal currents (unit C-b). The evolution of units C-a and C-b is closely related to postglacial sea-level changes, sediment erosion, and reworking. These late Quaternary Deposits have been controlled by sea-level change, tidal currents, and sediment erosion.
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sedimentary environment and sequence stratigraphy of late Quaternary Deposits in the east china sea
Marine Georesources & Geotechnology, 2013Co-Authors: Gwang Soo Lee, Daechoul Kim, Dong Geun YooAbstract:High-resolution (Chirp and Sparker system) seismic profiles were analyzed to investigate the sedimentary environment and sequence stratigraphy of the late Quaternary Deposits in the East China Sea. Echo types in the study are divided into three major echo types which are classified as flat (transgressive sediment sheets, relict sands, and Holocene muds), mounded (tidal ridges), and irregular echoes (channels). Sequence analysis of high-resolution seismic profiles reveals that the shelf Deposits form a succession of high-frequency (fifth-order) sequences consisting of three depositional sequences (DI, DII, and DIII) developed during the late Quaternary. The depositional sequence includes five sedimentary units, each with different seismic facies and geometry: (1) regressive estuarine/deltaic wedge (unit J1), (2) regressive deltaic/offshore Deposits (unit J2), (3) low-stand deltaic wedge with incised-channel fill (unit J3), (4) transgressive estuarine/deltaic complex (unit J4-a) and sand ridges/sheet (unit ...
Thijs Van Kolfshoten - One of the best experts on this subject based on the ideXlab platform.
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State of stratigraphic knowledge of Quaternary Deposits in European Russia: Unresolved issues and challenges for further research
Quaternary International, 2018Co-Authors: Andrey Zastrozhnov, Guzel Danukalova, Sergey Shick, Thijs Van KolfshotenAbstract:Abstract The paper is devoted to summary and analysis of the Quaternary stratigraphic investigations and state of the stratigraphic schemes of the different regions of the European part of Russia. The previous summary on the Quaternary of Russia was done in 1984. Thus, this paper presents a brief analysis of the state of the Quaternary investigations in European Russia for the first time since last 30 years. Paper describes history of the Quaternary investigations of the European Russia as well as zoning (structural-facies zones) of the territory in correlation with the conditions of the Quaternary sedimentation. Summary of the Quaternary Deposits developed in each zone and validity of stratigraphic units as well as state of the Regional Quaternary schemes is given for each structural-facies zone. Regional schemes are correlated with units of the General Stratgraphic chart of Russia and with International Chart. Analysis of the stratigraphic knowledge on the Quaternary Deposits in various structural-facies zones in the European part of Russia has enabled to formulate the unresolved and discussable points and direction for the future investigations of the Quaternary studies. 1. Due to the change of boundary between the Neogene and Quaternary systems and involvement of the Palaeopleistocene stage in the Quaternary, stratigraphic horizons in this interval require additional study, and the most representative sequences should be selected as unit stratotypes for different zones. 2. In the areas of ice cover, various opinions on the age and number of glacial horizons in the Upper-Middle Neopleistocene, their distribution boundaries are still debatable. 3. In some areas and regions (Fore-Caucasus, Caucasus, Urals, Black Sea), differentiation of continental Deposits is poorly substantiated by fauna. Their stratification is based on palaeoclimatic reconstructions, geomorphological analysis, and comparison with substantiated by fauna marine sequences of Ponto-Caspian Sea or continental sequences in the Fore-Urals and Western Siberia. Here, the most urgent task is to search for and study sequences in the transitional zone incorporating continental, ingressive, and marine sediments. 4. Development of regional charts for the Quaternary is relevant for the Caucasus, the Black Sea coast regions.
