Quartz OSL dating of palaeosols intercalated with basaltic lava flows and scoria deposits from monogenetic volcanoes in northeastern Jeju Island, Korea

Yeo, Eun-Young; Choi, Jungsoon; Ahn, Ung San; Cheong, Albert Chang-sik

doi:10.1007/s12303-019-0010-2

Cited by 8 publications

(1 citation statement)

References 38 publications

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“…Thus, our study in caves is particularly meaningful, because we had a unique opportunity to directly observe the multi-dimensional flow of infiltrated rainwater along palaeosol layers throughout the caves spanning several kilometres. Considering that Jeju volcanic island and other volcanic islands around the world have been formed by repeating volcanic activities and hiatuses for millions of years (e.g., Carracedo et al, 2007;Jeffery & Gertisser, 2018;Ukstins et al, 2002) and have several paleosols or sediments layers formed in hiatus (e.g., Bestland et al, 1997;Lucchi, 2019;Panfil et al, 1999;Yeo et al, 2019), palaeosol-related groundwater inflow in two caves is unlikely to be a phenomenon only In the island, springs and streams in mountainous areas were regarded to be derived from the perched aquifers at the local scale (Jung et al, 2016;Koh et al, 2012). For other volcanic islands, the presence of perched or upper aquifers was also suggested.…”

Section: Establishment Of a Hydrogeological Conceptual Model Of Volcanic Aquifersmentioning

confidence: 99%

Conceptualizing a multi‐layered shingle aquifer model based on volcanic stratigraphy and water inflow to lava caves in Jeju Island, Korea

Ahn¹,

Koh

Heo

et al. 2021

Hydrological Processes

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Volcanic aquifers supply a substantial portion of water resources in many parts of the world, including islands, and their productivity depends strongly on volcanic stratigraphy, which exhibits considerable heterogeneity. We investigated water inflow to lava tube caves formed from numerous basaltic lava flows in the northeastern coastal area of Jeju Island after storm events and monitored relative inflow rates monthly over 1 year to characterize groundwater flow processes in the upper parts of volcanic aquifers, and to evaluate the applicability of the previous hydrogeological models proposed for the island. Considerable water inflow arose

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Section: Establishment Of a Hydrogeological Conceptual Model Of Volcanic Aquifersmentioning

confidence: 99%

Conceptualizing a multi‐layered shingle aquifer model based on volcanic stratigraphy and water inflow to lava caves in Jeju Island, Korea

Ahn¹,

Koh

Heo

et al. 2021

Hydrological Processes

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Hydrovolcanic activity on a continental shelf inferred from the subsurface diatreme- and crater-filling deposits of Jeju Island, Korea

2022

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Jeju Island comprises numerous tuff rings and tuff cones and their reworked deposits in the subsurface, which formed on the ca. 120-m-deep Yellow Sea continental shelf under the fluctuating Quaternary sea levels. Tens of meter-thick and massive deposits were found by chance during groundwater drilling at three sites. These deposits are interpreted as either syn-eruptive diatreme-filling deposits or post-eruptive crater-filling deposits, both of hydromagmatic volcanoes. The diatremes were cut into shelf sediment, 70 to 250 m thick, and developed generally within it below the Quaternary sea levels. Abundant external water was therefore available for explosive magma-water interactions at shallow levels. The diatreme deposit in one core shows some features attributable to extreme wetness or water saturation of the diatreme fill, such as the matrix support of larger clasts, meager vertical changes in matrix content, and an absence of features related to particle adhesion. Fluidally shaped clasts with delicate reentrant margins in the core suggest minimal particle abrasion and breakage in a water-saturated and highly fluid slurry of tephra and water that was probably filling a shallow bowl-like diatreme, which is distinguished from both phreatomagmatic and kimberlite diatremes. The diatreme deposits in other cores comprise blocky and angular clasts in a sideromelane ash matrix, suggesting phreatomagmatic explosions at a deeper level. One of the cores contains collapsed deposits of thinly stratified tuff emplaced by pyroclastic surges, indicating that the diatreme is associated with an emergent tuff ring. Both Surtseyan and phreatomagmatic eruptions are therefore interpreted to have occurred on the shelf under the controls of fluctuating Quaternary sea levels. The subsurface diatremes suggest that there can be a variety of diatremes with different sizes, shapes, and material characteristics beneath the craters of hydromagmatic volcanoes, including not only maars but also tuff rings and tuff cones.

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Characterization of bioavailable Sr isotopic composition of Jeju Island, Korea

et al. 2020

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Quartz OSL dating of palaeosols intercalated with basaltic lava flows and scoria deposits from monogenetic volcanoes in northeastern Jeju Island, Korea

Cited by 8 publications

References 38 publications

Conceptualizing a multi‐layered shingle aquifer model based on volcanic stratigraphy and water inflow to lava caves in Jeju Island, Korea

Conceptualizing a multi‐layered shingle aquifer model based on volcanic stratigraphy and water inflow to lava caves in Jeju Island, Korea

Hydrovolcanic activity on a continental shelf inferred from the subsurface diatreme- and crater-filling deposits of Jeju Island, Korea

Characterization of bioavailable Sr isotopic composition of Jeju Island, Korea

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