Seismicity characteristics of a potentially active Quaternary volcano: The Tatun Volcano Group, northern Taiwan

Konstantinou, Konstantinos I.; Lin, Chia‐Hua; Liang, Wen‐Tzong

doi:10.1016/j.jvolgeores.2006.09.009

Cited by 73 publications

(83 citation statements)

References 44 publications

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“…it erupted many times through a relatively stable conduit), it is the most probable candidate for reactivation in the future. This notion is supported by the seismic data of Konstantinou et al (2007) that points to the existence of an active magma chamber under Cising volcano.…”

Section: Location Of Future Eruptions In Tvgmentioning

confidence: 73%

“…Geophysical and geochemical data have shown that there is a still active magma chamber present below Mt. Cising (Konstantinou et al, 2007). Hence, despite the lack of historic eruptions, from the perspective of volcanic hazard mitigation the TVG volcanoes should be considered as active.…”

Section: Timing Of the Youngest Eruptions Of The Tvgmentioning

confidence: 99%

“…Although the group has not had any historical eruptions, its volcanic edifices are well-preserved and are dotted by multiple hot springs and solfataras with temperatures up to 116°C (Witt et al, 2008). Detailed investigations undertaken in recent years have provided several lines of evidence that an active magma chamber is present below the TVG: (1) compositions of gases from the TVG fumaroles indicate their origin from a magmatic source (Yang et al, 1999;Lee et al, 2005;Lee et al, 2008;Witt et al, 2008); (2) shallow-level seismicity similar to seismicity under active volcanoes has recently been observed (Lin et al, 2005;Kim et al, 2005;Konstantinou et al, 2007); and (3) geodetic measurements (leveling and GPS) reveal steady local ground deformations of the TVG, which may be caused by pressure changes at depth, possibly associated with migration of magma and/or hydrothermal fluids (Yu et al, 1997;Konstantinou et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…The potential for renewed activity of the TVG has been debated for some time (Song et al, 2000a;Konstantinou et al, 2007). Although the group has not had any historical eruptions, its volcanic edifices are well-preserved and are dotted by multiple hot springs and solfataras with temperatures up to 116°C (Witt et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Deposits, character and timing of recent eruptions and gravitational collapses in Tatun Volcanic Group, Northern Taiwan: Hazard-related issues

Belousov

Belousova

Chen

et al. 2010

Journal of Volcanology and Geothermal Research

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Keywords:extrusive eruption explosive eruption pyroclastic edifice collapse volcanic hazard Taiwan Taipei City, with a population of around 8 million, as well as two nuclear power plants is located in close proximity to the Quaternary, dominantly andesitic Tatun Volcanic Group (TVG) of Northern Taiwan. We have investigated the stratigraphy of the youngest volcaniclastic deposits, as well as the morphology of lava flows and domes of the TVG in order to reconstruct the character and timing of the most recent eruptions and related hazardous events in the area. Our data indicate that recent eruptions of the group were dominated by long-term, voluminous extrusions of crystal-rich, very viscous lavas. These eruptions formed closely spaced monogenetic domes and lava flows. Based on morphological parameters of the lava flows (thicknesses 80-150 m, lengths up to 5.6 km, and volumes up to 0.6 km 3 ), average rates of magma effusion ranged from 1 to 10 m 3 /s, eruption durations from 500 to 1800 days, and lava front speeds from 0.5 to 6 m/h. Explosive activity of TVG was diverse, ranging from weak phreatic to highly explosive (VEI 4) Plinian eruptions; vulcanian activity with deposition of lithic ashes was most common. Interaction of rising magma with ground water frequently occurred during the eruptions. This study presents the first radiocarbon dates of various volcaniclastic deposits of the TVG, which indicate that Cising, Siaoguanyin, and possibly Huangzuei volcanoes had magmatic eruptions in the period 13,000-23,000 years ago. In addition, Mt. Cising had a phreatic eruption 6000 years ago, and possibly an effusive eruption just before that. Gravitational collapses of volcanic edifices with volumes 0.01-0.1 km 3 and H/L 0.16-0.25 were also common. They occurred on intersections with tectonic faults and may have been triggered by seismic activity. The youngest collapses occurred at Mt. Siaoguanyin (23,000 BP) and Mt. Cising (6000 BP). It is concluded that the TVG should be considered volcanically active. The results of this study provide a basis for volcanic hazard assessment and mitigation in the area.

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Section: Location Of Future Eruptions In Tvgmentioning

confidence: 73%

Section: Timing Of the Youngest Eruptions Of The Tvgmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Deposits, character and timing of recent eruptions and gravitational collapses in Tatun Volcanic Group, Northern Taiwan: Hazard-related issues

Belousov

Belousova

Chen

et al. 2010

Journal of Volcanology and Geothermal Research

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“…The volcanoes of the TVG have usually been considered dormant or extinct because no historical eruptions have been recorded. However, a large number of shallow micro-earthquakes, harmonic codas and seismic tremors have been identified showing that a magma chamber may still exist beneath the TVG (Lin et al 2005;Konstantinou et al 2007). High heat flows with geothermal gradients higher than 100°C km -1 were detected through geothermal exploration between 1960s and 1970s (MRSO 1969(MRSO , 1970(MRSO , 1971(MRSO , 1973.…”

Section: Introductionmentioning

confidence: 99%

Characteristics and Origins of Hot Springs in the Tatun Volcano Group in Northern Taiwan

Liu¹,

Song²,

Chen³

et al. 2011

Terr. Atmos. Ocean. Sci.

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This paper systematically surveyed distribution and field occurrences of 13 hot springs as well as geochemical investigation on the geothermal area of the Tatun Volcano Group (TVG). According to Piper diagrams, pH values, field occurrences and water-rock interactions, these hot springs can be classified into three types: (1) Type I, SO 4 2-acidic water where the reservoir is located in the Wuchishan Formation; (2) Type II, HCO 3 -a near neutral spring where waters originate from the volcanic terrane (andesite); and (3) Type III, Cl --rich acidic water where waters emanate from shallower Wuchishan Formation. In terms of isotopic ratio, δD and δ 18O values, two groups of hot spring can be recognized. One is far away from the meteoric water line of the Tatun area with values ranging between -26.2‰ and -3.5‰, and from -3.2‰ to 1.6‰, respectively. However, another close to the meteoric water line of the Tatun area is between -28.4‰ and -13.6‰, and from -5.5‰ to -4.2‰, respectively. In addition, the δ 34 S value of thermal waters can also be distinguished into two groups, one ranging from 26.1‰ to 28.5‰, and the other between 0.8‰ and 7.8‰. Based on field occurrences and geochemical characteristics, a model has been proposed to illustrate the origin of these hot springs.

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Unveiling the magmatic plumbing system of Tatun volcano in northern Taiwan using joint inversion of local and teleseismic P-wave data

Huang

Lin

et al. 2020

Preprint

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Seismicity characteristics of a potentially active Quaternary volcano: The Tatun Volcano Group, northern Taiwan

Cited by 73 publications

References 44 publications

Deposits, character and timing of recent eruptions and gravitational collapses in Tatun Volcanic Group, Northern Taiwan: Hazard-related issues

Deposits, character and timing of recent eruptions and gravitational collapses in Tatun Volcanic Group, Northern Taiwan: Hazard-related issues

Characteristics and Origins of Hot Springs in the Tatun Volcano Group in Northern Taiwan

Unveiling the magmatic plumbing system of Tatun volcano in northern Taiwan using joint inversion of local and teleseismic P-wave data

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