Intraplate volcanism influenced by distal subduction tectonics at Jeju Island, Republic of Korea

Brenna, Marco; Cronin, Shane J.; Keresztúri, Gábor; Sohn, Young Kwan; Smith, I. E.; Wijbrans, J. R.

doi:10.1007/s00445-014-0896-5

Cited by 62 publications

(27 citation statements)

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“…In regard to the source characteristics, at Jeju, primitive melts with alkalic (basanite) to subalkalic affinities formed in response to variable degrees of source partial melting at different depths due to an upwelling source (Tatsumi et al 2005;Brenna et al 2015). Instead, at Oki-Dōzen, both central and flank magmas were derived from a relatively homogeneous primitive alkalic basalt, which is indicative of a source within a vertically and laterally restricted portion of upper mantle.…”

Section: Significance For Intraplate Alkalic Volcanismmentioning

confidence: 92%

A trachyte–syenite core within a basaltic nest: filtering of primitive injections by a multi-stage magma plumbing system (Oki-Dōzen, south-west Japan)

Brenna

Nakada

Miura

et al. 2015

Contrib Mineral Petrol

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that distinguish it from the rest of the system. Geochemical modelling indicates that magmatic differentiation through crystal fractionation and minor crustal assimilation occurred in crustal and shallow sub-volcanic magma reservoirs. In the central part of the system, a number of vertically spaced reservoirs acted as a filter, capturing basaltic dykes and hindering their ascent. In the outer region, dykes either reached the surface unhindered and erupted to form the basaltic/trachybasaltic succession or stalled at crustal levels and differentiated to trachyte before forming dispersed domes/flows. The central plumbing system "filter" resulted in a nest-shaped volcano, with a trachytic core surrounded by basaltic products, and stopped direct injection of basaltic magmas into the shallow syenitic magma reservoir, likely preventing its destabilization and explosive eruption.

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Section: Significance For Intraplate Alkalic Volcanismmentioning

confidence: 92%

A trachyte–syenite core within a basaltic nest: filtering of primitive injections by a multi-stage magma plumbing system (Oki-Dōzen, south-west Japan)

Brenna

Nakada

Miura

et al. 2015

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“…By forming dispersed monogenetic volcanic cones and lava flows (Brenna, Cronin, Smith, Sohn, & Maas, ), the volcanism was initiated by hydrovolcanic activity (G. W. Koh et al, ; Sohn et al, ; Sohn & Park, ) on a continental shelf of granitic basement since the Pleistocene (~1.8 Ma; K. H. Kim et al, ). Subsequent large‐volume lava effusion formed a composite shield along with hundreds of individual eruptive centers above the sea surface since the Middle Pleistocene (~0.5 Ma), and several tuff rings and tuff cones were formed during the Late Pleistocene and Holocene (Figure c; Brenna, Cronin, et al, ; G. W. Koh et al, ). Additional lava flows from evolved magma formed the uppermost part of the island consisting of Mt.…”

Section: Geological Setting and Historymentioning

confidence: 99%

“…Although this volcanic system is common in different intraplate settings (Connor & Conway, ; Le Corvec et al, ), the origin and evolution of magmatism in such a system are not well understood. This is due to a lack of information about the melt focusing process in the lithospheric and sublithospheric upper mantle and about heterogeneous interactions of the magma with the surrounding lithosphere and tectonic structures (Brenna, Cronin, et al, ; Cañón‐Tapia & Walker, ; Hoernle et al, ; Smith & Németh, ).…”

Section: Introductionmentioning

confidence: 99%

“…Volcanoes have erupted episodically from the Pleistocene (~1.8 Ma) to the Holocene (~3.7 ka), yielding more than 300 small‐scale volcanoes of different types, including scoria cones, tuff rings, tuff cones, and lava domes and a central basaltic shield in a confined area (75 × 32 km 2 ). JI is formed in an intraplate setting, and several hypotheses have been put forward to explain its formation mechanism (e.g., Brenna, Cronin, et al, ; M. W. Lee, ; Nakamura et al, ; Shin et al, ; Tatsumi et al, ; see section 5.3 for further details). However, due to a lack of geophysical studies, the origin and magmatic processes of volcanism in JI have not been confirmed.…”

Section: Introductionmentioning

confidence: 99%

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Imaging of Lithospheric Structure Beneath Jeju Volcanic Island by Teleseismic Traveltime Tomography

et al. 2018

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Jeju Island (JI) is an intraplate volcanic field located at the continental margin of Northeast Asia. This volcanic island has been formed by multiple eruptions from the Pleistocene to the Holocene (~3.7 ka), which have yielded hundreds of monogenetic volcanic cones and a central basaltic shield. To understand the volcanic structures and mechanism beneath JI, we deployed 20 broadband temporary seismometers across the island for over two years (October 2013 to November 2015). We investigated the crustal and upper mantle structures in JI for the first time using the gathered data. Through teleseismic traveltime tomography, we obtained images of the lithospheric structure related to the volcanic system. A major finding was the identification of a prominent low‐velocity anomaly (<−0.3 km/s in P wave velocity relative to the surrounding high‐velocity region) beneath the summit of the central shield volcano at greater depths (50–60 km), which separates into low‐velocity zones at shallower depths (10–45 km). Based on previous geological observations, the anomalies were interpreted as a magmatic system, potentially with partial melting. Moreover, relatively high velocity zones were consistently imaged to the north, east, and west of the island, indicating relatively thick lithospheric structures at the southern margin of the continental lithosphere beneath the Korean Peninsula. Based on the geometries of the imaged structures, we suggest that a focused decompressional melting at sublithospheric depths and complex magma interactions within the lithosphere resulted in the characteristics of JI volcanism as intraplate magmatic activities that are isolated in space and confined in time.

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“…1). 지금까지 제주도 화산활동 시기를 밝히기 위해 KAr연대 및 Ar-Ar연대측정 연구들이 수행되어 왔다 (Koh et al, 2008c(Koh et al, , 2010a(Koh et al, , 2010b(Koh et al, , 2013Yun et al, 1987;Won et al, 1993;Lee et al, 1994;Brenna et al, 2015;Miyake et al, 1993;Tamanyu, 1990;Won et al, 1986) …”

Section: 연구방법unclassified

Study of the Last Volcanic Activity on Historical Records on Jeju Island, Korea

Ahn¹

2016

The Journal of the Petrological Society of Korea

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Radiocarbon and OSL ages of three monogenetic volcanoes inferred to be the last volcanoes on Jeju Island, Korea were determined to identify a volcano described in historical records. The results show that the ages of those volcanoes are roughly <3.8 ka (Songaksan), >4.5 ka (Biyangdo), and <6~7 ka (Ilchulbong). Though our efforts to make a positive match between historical records and volcanochronological dating were not successful, we make a new suggestion in this paper that two historical records of volcanic activity in 1002 and 1007 A.D. could be interpreted to be the sequential volcanic events from a single monogenetic volcano. In addition, based on a volcanological reinterpretation of historical records, we infer that the volcano described therein is most likely Mt. Songaksan, in Daejeongeup, which had early phreatomagmatic and late magmatic activities after 3.8 ka ago. Furthermore, considering the geopolitical relationship between the Goryeo Dynasty and the Tamna Kingdom, in addition with the culture of the era, this study sheds new light on the possibility that there is a time gap between the actual eruptions and the historical recording of them by ancient people.

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Intraplate volcanism influenced by distal subduction tectonics at Jeju Island, Republic of Korea

Cited by 62 publications

References 128 publications

A trachyte–syenite core within a basaltic nest: filtering of primitive injections by a multi-stage magma plumbing system (Oki-Dōzen, south-west Japan)

A trachyte–syenite core within a basaltic nest: filtering of primitive injections by a multi-stage magma plumbing system (Oki-Dōzen, south-west Japan)

Imaging of Lithospheric Structure Beneath Jeju Volcanic Island by Teleseismic Traveltime Tomography

Study of the Last Volcanic Activity on Historical Records on Jeju Island, Korea

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