Gravimetric studies of Taal Volcano, philippines

Yokoyama, Izumi; Alcaraz, Arturo; Peña, O.

doi:10.1007/bf02597268

Cited by 6 publications

(2 citation statements)

References 1 publication

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“…12 ) Moreover, the hydrothermal reservoir, despite being highly fractured, is considered structurally rigid 13 ) and dense enough to show a high gravity anomaly. 14 ) The resistivity value of ∼100 Ω·m can be explained by the presence of hydrothermal fluids in a gas phase. However, it seems that co-existence of hydrothermal fluids in liquid phase is needed for causing a large eruption.…”

Section: The 3-d Resistivity Structure Beneath Taal Volcano Islandmentioning

confidence: 99%

A large hydrothermal reservoir beneath Taal Volcano (Philippines) revealed by magnetotelluric observations and its implications to the volcanic activity

Alanis

Yamaya

Takeuchi

et al. 2013

Proceedings of the Japan Academy. Ser. B: Physical and Biologic

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Taal Volcano is one of the most active volcanoes in the Philippines. The magnetotelluric 3D forward analyses indicate the existence of a large high resistivity anomaly (∼100 Ω·m) with a volume of at least 3 km × 3 km × 3 km, which is capped by a conductive layer (∼10 Ω·m), beneath the Main Crater. This high resistivity anomaly is hypothesized to be a large hydrothermal reservoir, consisting of the aggregate of interconnected cracks in rigid and dense host rocks, which are filled with hydrothermal fluids coming from a magma batch below the reservoir. The hydrothermal fluids are considered partly in gas phase and liquid phase. The presence of such a large hydrothermal reservoir and the stagnant magma below may have influences on the volcano’s activity. Two possibilities are presented. First, the 30 January 1911 explosion event was a magmatic hydrothermal eruption rather than a base-surge associated with a phreato-magmatic eruption. Second, the earlier proposed four eruption series may be better interpreted by two cycles, each consisting of series of summit and flank eruptions.

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Section: The 3-d Resistivity Structure Beneath Taal Volcano Islandmentioning

confidence: 99%

A large hydrothermal reservoir beneath Taal Volcano (Philippines) revealed by magnetotelluric observations and its implications to the volcanic activity

Alanis

Yamaya

Takeuchi

et al. 2013

Proceedings of the Japan Academy. Ser. B: Physical and Biologic

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“…This could be due to hot geotherm caused by long‐lasting activity underneath the Taal/Laguna de Bay volcanic field. This configuration is supported by gravity profiles indicating a high plateau‐shaped anomaly, modeled as a graven structure underlain by a thick dense igneous intrusion (Yokoyama et al 1975). Seismicity would therefore be better expressed southward away from the active volcanic zone.…”

Section: The Transfer Zonementioning

confidence: 77%

Recent deformation at the junction between the North Luzon block and the Central Philippines from ERS‐1 Images

Pubellier¹,

García²,

Loevenbruck³

et al. 2000

Island Arc

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The transfer of the major part of the motion between the Philippine Sea Plate and the Sunda block is accommodated along a north-west shear wide zone partly on the Philippine Fault and partly on the Sibuyan Verde Passage Fault (SVPF) as indicated by global positioning satellite and geological data. Given the limited motion along the SVPF and the important motion along the Philippine Fault, as well as the necessity of a connection between these faults and the southern Manila Trench, a transtensional motion along the northeast-southwest Macolod Corridor (MC) may be predicted. We used synthetic aperture radar European remote sensing (SAR ERS-1) images to analyze the volcanotectonic features of this area, because these images are sensitive to minute textural or topographic contrasts resulting from small effects of recent deformation. In addition, they allow us to determine accurately the shape of the base of volcanic edifices and to detect linear clusters of very small adjacent cones. The results presented herein allow us to extend the features recognized earlier to a larger MC. Large faults actually connect the Philippine Fault to the Sibuyan Verde Passage Fault all across the Taal Volcanic Field. In addition to extension along north-east faults, we identify an important component of leftlateral strike-slip underlined by fault scarps, dykes, alignments of volcanoes and pull-apart basins, accompanied by extension along north-south faults. A relative chronology of the fractures and volcanic edifices is proposed. When compared to the existing ages of the volcanics, an evolution scheme of the area may be proposed, according to which extension shifted from a nearly north-south opening between 5 and 2 million years to a direction close to east-west at Present. The early north-south extension existed in the Marinduque Basin and may have migrated northward and rotated to the present MC.

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Electrical resistivity tomography study of Taal volcano hydrothermal system, Philippines

Fikos

Vargemezis

Zlotnicki³

et al. 2012

Bull Volcanol

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Gravimetric studies of Taal Volcano, philippines

Cited by 6 publications

References 1 publication

A large hydrothermal reservoir beneath Taal Volcano (Philippines) revealed by magnetotelluric observations and its implications to the volcanic activity

A large hydrothermal reservoir beneath Taal Volcano (Philippines) revealed by magnetotelluric observations and its implications to the volcanic activity

Recent deformation at the junction between the North Luzon block and the Central Philippines from ERS‐1 Images

Electrical resistivity tomography study of Taal volcano hydrothermal system, Philippines

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