A Refined Historical Record of Volcanic Eruptions around Taiwan: Tectonic Implications in the Arc-continent Collision Area

Chen, Chang-Hwa; Shen, Jason Jiun-San

doi:10.3319/tao.2005.16.2.331(tt)

Cited by 12 publications

(6 citation statements)

References 16 publications

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“…Lithospheric mantle weakening may thus occur right above the slab dehydration domain, i.e., in the arc and proximal ''back-arc''. One may also expect that water impregnation of the mantle favors melting, but no volcanic activity was mentioned in the Huatung Basin except one controversed report off the Coastal Range in 1853 (Chen and Shen, 2005). Such uppermost mantle weakening combined with crustal hydrothermalism and eventually the presence of ''middle crust'' in the arc favor the development of crustal and uppermost mantle shortening whereas the lower lithospheric PSP mantle subducts beneath the Taiwan orogen.…”

Section: Crustal Versus Lithospheric Deformationmentioning

confidence: 89%

Strain modes within the forearc, arc and back-arc domains in the Izu (Japan) and Taiwan arc-continent collisional settings

Lallemand

2014

Journal of Asian Earth Sciences

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Section: Crustal Versus Lithospheric Deformationmentioning

confidence: 89%

Strain modes within the forearc, arc and back-arc domains in the Izu (Japan) and Taiwan arc-continent collisional settings

Lallemand

2014

Journal of Asian Earth Sciences

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“…Recently, more data support that there may be existing magma chamber underneath TVG (Song et al, 2000;Yang, 2000;Lin et al, 2005). Chen and Shen (2005) reviewed some claimed historical eruptions in northern Taiwan and suggested that there were three records may be related to the magmatism of northern Taiwan volcanic zone and Quaternary Ryukyu volcanic front. Recently, Lin et al (2004) analyzed the earthquake data to determine the three-dimensional V p and V s velocity structures in NE Taiwan and found a low V s but high V p /V s sausage-like body, ~30 km in diameter, lies within the Eurasian mantle wedge, on the top of the most western part of Ryukyu slab.…”

Section: M : Percent Of Mantle Component Based On the Calculation Omentioning

confidence: 99%

Gas compositions and helium isotopic ratios of fluid samples around Kueishantao, NE offshore Taiwan and its tectonic implications

et al. 2005

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Kueishantao is a Holocene volcanic islet (<7,000 yrs) located at NE offshore Taiwan, and tectonically is part of western extension of the Okinawa Trough. Magmatic activities are considered very active around this area on the basis of the fact that on-land fumaroles and submarine hydrothermal systems are prevailing currently. Representative bubble gas samples from submarine hydrothermal vents were collected for gas composition and helium isotope analysis. The gases show similar compositions of low temperatre fumaroles in the world, i.e., with high CO 2 and H 2 S but low SO 2 and HCl contents. They exhibit consistent high 3 He/ 4 He ratios (7.3-8.4 R A , where R A is the 3 He/ 4 He ratio of air), probably the highest 3 He/ 4 He values of gases ever reported in active hydrothermal areas of the western Pacific region. Meanwhile, seawater samples around Kueishantao and other fluid samples from I-Lan Plain, the land area closest to the Kueishantao and also the southernmost part of the Okinawa Trough, show a significant excess of 3 He compositions as well. This indicates that the mantle component plays an important role for their gas sources, and implies that the mantle fluids may have invaded into I-Lan Plain. The westward opening of the Okinawa Trough may have caused thinning of the continental crust and produced deep normal faults and hence, the primordial 3 He is able to degas from mantle source region without significant crust contamination.

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“…One of the most obvious features in SOT is the submarine volcanoes (Lee et al 1980;Liu et al 1998;Sibuet et al 1998), an indicator for the presence of hydrothermal vent systems, which infers potential for submarine mineral explorations. On the other hand, submarine volcanic eruptions, occurring more than 100 years ago, have been reported to the south of East China Sea based on the historical records (Chen and Shen 2005). This observation also presumes a geo-hazard potential for its nearby areas.…”

Section: Introductionmentioning

confidence: 89%

Spatial and temporal distribution of low frequency volcanic earthquakes in the southern Okinawa Trough back-arc basin

Lin¹,

Wu²,

Su³

et al. 2019

Terr. Atmos. Ocean. Sci.

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Located to the south of East China Sea, the Southern Okinawa Trough (SOT) is a back-arc basin, which belongs to the Ryukyu subduction system. SOT is characterized by an active normal faulting system and numerous volcanic outcrops, which could have marine mineral and geo-hazard potential for its nearby areas. By analyzing the data from the inland Central Weather Bureau Seismic Network (CWBSN) stations, we manually exanimated the waveforms of 2263 earthquakes collected from 1991 to the end of 2011 to identify the possible low frequency (LF) volcanic events. In total, 80 LF earthquakes were recognized. An updated relocation seismicity catalog was used to obtain a more reliable epicenter location. These LF events were mainly located along the central graben of SOT and to the southeast of the Kueishantao (KST) Island. The depths of the LF events are mostly shallower than 15 km near KST, and become deeper when the hypocenters get closer to the central axis of SOT. The LF earthquakes located near KST have relatively higher tendency to occur in cluster with a time interval of 1 to 4 years and the epicenters show a spatial migration. By comparing the distribution of the LF earthquakes with the available geophysical data, we suggest the major faults in SOT do not only influence the distribution for shallow volcanic bodies, but also confine the area of the deep magmatic activity.

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A Refined Historical Record of Volcanic Eruptions around Taiwan: Tectonic Implications in the Arc-continent Collision Area

Cited by 12 publications

References 16 publications

Strain modes within the forearc, arc and back-arc domains in the Izu (Japan) and Taiwan arc-continent collisional settings

Strain modes within the forearc, arc and back-arc domains in the Izu (Japan) and Taiwan arc-continent collisional settings

Gas compositions and helium isotopic ratios of fluid samples around Kueishantao, NE offshore Taiwan and its tectonic implications

Spatial and temporal distribution of low frequency volcanic earthquakes in the southern Okinawa Trough back-arc basin

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