Spatio-temporal evolution of a dispersed magmatic system and its implications for volcano growth, Jeju Island Volcanic Field, Korea

Brenna, Marco; Cronin, Shane J.; Smith, I. E.; Sohn, Young Kwan; Maas, Roland

doi:10.1016/j.lithos.2012.06.021

Cited by 77 publications

(54 citation statements)

References 72 publications

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“…In the isotope correlation diagrams, the rocks plot in the field of Jeju Island alkali basalts Tatsumi et al, 2005;Chang et al, 2006;Choi et al, 2006;Brenna et al, 2012aBrenna et al, , 2012b between BSE and HIMU (high µ refers to high 238 U/ 204 U) (Figures 11a-11d). However, the samples are depleted with respect to the bulk earth.…”

Section: Strontium Neodymium and Lead Isotopesmentioning

confidence: 99%

Petrogenesis of Plio-Quaternary basanites in the Gandom Beryan area, Kerman,Iran: geochemical evidence for the low-degree partial melting of enriched mantle

Yousefi¹,

Moradian²,

Ahmadipour³

2017

Turkish J Earth Sci

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In the Gandom Beryan area, basanitic lava flows erupted from fractures in the Nayband fault zone and formed an area of about 300 km 2 of basanitic rocks in the western part of the Lut Block. Olivine and clinopyroxene are the major phenocrysts in a microlitic groundmass for these basanitic rocks. The geochemical data show that Gandom Beryan rocks are basanite in composition and belong to intercontinental rifts related to alkali basanites. These rocks have low Fe/Mg ratios (Fe 2 O 3t /MgO = 1.07-1.43) with low silica content (SiO 2 = 44.89-48.26 wt.%) and are high-Ti basanites. The investigated rocks are characterized by a significant enrichment of total REE and LREE relative to chondrite. Moreover, the REE patterns of these rocks are linear without any negative Eu anomalies. The low abundances of HREE in basanitic rocks and the REE modeling together reflect the relation between these elements and residual garnet in the partially melted mantle. The 207 Pb/ 204 Pb and 206 Pb/ 204 Pb ratios of the basanitic rocks fall near the field of enriched mantle II (EM-II). The Gandom Beryan volcanism, which was related to partial melting of mantle within an extensional setting, resulted from a left-step, pull-apart basin in the Nayband N-S trending strike-slip fault system. Although the fault system is older than Gandom Beryan volcanism, it seems that it has been reactivated during and after the volcanism.

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Section: Strontium Neodymium and Lead Isotopesmentioning

confidence: 99%

Petrogenesis of Plio-Quaternary basanites in the Gandom Beryan area, Kerman,Iran: geochemical evidence for the low-degree partial melting of enriched mantle

Yousefi¹,

Moradian²,

Ahmadipour³

2017

Turkish J Earth Sci

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“…While anomalous in eruption style, these vents and their magma compositions are related to the basaltic lavas in this field, and are common to other volcanic fields on the Arabian Shield (Khaybar, Camp et al 1991), as well as other similar volcanic fields in other parts of the world (Jeju, Brenna et al 2012). The co-genetic relationship of these eruptions of differing composition leads to the decision to include all observed vents within the volcanic field boundary.…”

Section: Anomalous Ventsmentioning

confidence: 59%

“…Lutz and Gutmann (1995) discounted any distal vents deemed to be located at the edges of the Pinacate volcanic field when performing lineament analysis using a circular region. For island-based distributed volcanism (Jeju, Brenna et al 2012; Ambae Island, Vanuatu, Németh and Cronin 2009), offshore eruptions are often discounted when forming a volcanic field boundary for spatial intensity estimation (Tenerife, Martí et al 2009;El Hierro, Canaries, Melían et al 2014), although they were included in work by Becerril et al (2013). This may considerably underestimate the hazard, especially where magma-water interaction may cause the most explosive eruptions from such fields (Németh and Cronin 2009).…”

Section: Anomalous Ventsmentioning

confidence: 99%

“…However, the most recent eruption may be the best indicator of future eruptions, and it is not uncommon for volcanic fields to contain large, shield-like volcanic structures (Mount Gambier, Bishop 2007; Jeju, Brenna et al 2012), which may represent slightly different manifestations of volcanism from the same source area. Thus, in the AVF, all vents are included in the field boundary estimations.…”

Section: Anomalous Ventsmentioning

confidence: 99%

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Sensitivity to volcanic field boundary

et al. 2015

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Volcanic hazard analyses are desirable where there is potential for future volcanic activity to affect a proximal population. This is frequently the case for volcanic fields (regions of distributed volcanism) where low eruption rates, fertile soil, and attractive landscapes draw populations to live close by. Forecasting future activity in volcanic fields almost invariably uses spatial or spatio-temporal point processes with model selection and development based on exploratory analyses of previous eruption data. For identifiability reasons, spatio-temporal processes, and practically also spatial processes, the definition of a spatial region is required to which volcanism is confined. However, due to the complex and predominantly unknown sub-surface processes driving volcanic eruptions, definition of a region based solely on geological information is currently impossible. Thus, the current approach is to fit a shape to the known previous eruption sites. The class of boundary shape is an unavoidable subjective decision taken by the forecaster that is often overlooked during subsequent analysis of results. This study shows the substantial effect that this choice may have on even the simplest exploratory methods for hazard forecasting, illustrated using four commonly used exploratory statistical methods and two very different regions: the Auckland Volcanic Field, New Zealand, and Harrat Rahat, Kingdom of Saudi Arabia. For Harrat Rahat, sensitivity of results to boundary definition is substantial. For the Auckland Volcanic Field, the range of options resulted in similar shapes, nevertheless, some of the statistical tests still showed substantial variation in results. This work highlights the fact that when carrying out any hazard analysis on volcanic fields, it is vital to specify how the volcanic field boundary has been defined, assess the sensitivity of boundary choice, and to carry these assumptions and related uncertainties through to estimates of future activity and hazard analyses.

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“…Korea 화성쇄설밀도류에 대한 재난을 모의하기 위하여 TITAN2D (Sheridan et al, 2005), VolcFlow (Kelfoun and Druitt, 2005;Kelfoun et al, 2008;)나 Flow3D (Sheridan et al, 2000) 등과 같은 수치모의 프로그램들이 개발되어 왔으며, 이들 중 국내에서는 백두산에서 발생 가능한 화쇄류의 모의를 위하여 TITAN2D (Yun et al, 2013;와 VolcFlow (Chang and Yun, 2015)가 사용되었다. 본 연구에서는 백두산 의 화쇄류 수치모의를 위해 Yun et al(2013Yun et al( , 2014 (Lee and Yun, 2012 (Kim and Lee, 2000;Sohn and Park, 2004;Sohn et al, 2008;Sohn and Yoon, 2010;Brenna et al, 2012aBrenna et al, , 2012b. 크게 4단계로 분류되는 제주도의 형성 과정 (Lee, 1982 …”

Section: *Corresponding Authorunclassified

Simulation of Pyroclastic Density Current by Lava Dome Collapse at Jeju Island Using TITAN2D

Chang¹,

Yun²

2017

The Journal of the Petrological Society of Korea

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In order to determine the runout range of pyroclastic density currents on Jeju island, lava dome collapse on 8 locations of outer rim of Baekrokdam crater were simulated by TITAN2D numerical simulation program. We set parameters as internal friction angle as 30 o and bed friction angle as 20 o to control velocity of currents occurred by lava dome collapse. Then we set the height and radius of lava dome, initial speed of collapse and simulation times. And we carried out numerical simulations for a total of 96 scenarios. The result shows that the maximum runout distance was 13.4 km in case of lava dome collapse. This study can be used database for manufacturing of hazard map to minimize damages caused by pyroclastic density currents occurred on Jeju island.

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Spatio-temporal evolution of a dispersed magmatic system and its implications for volcano growth, Jeju Island Volcanic Field, Korea

Cited by 77 publications

References 72 publications

Petrogenesis of Plio-Quaternary basanites in the Gandom Beryan area, Kerman,Iran: geochemical evidence for the low-degree partial melting of enriched mantle

Petrogenesis of Plio-Quaternary basanites in the Gandom Beryan area, Kerman,Iran: geochemical evidence for the low-degree partial melting of enriched mantle

Sensitivity to volcanic field boundary

Simulation of Pyroclastic Density Current by Lava Dome Collapse at Jeju Island Using TITAN2D

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