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Conference Paper: Surprisingly young age for Chihsingshan in Taipei
Title | Surprisingly young age for Chihsingshan in Taipei |
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Authors | |
Issue Date | 2021 |
Citation | Asia Oceania Geosciences Society (AOGS) 18th Annual Meeting, Virtual Meeting, Singapore, 1-6 August 2021 How to Cite? |
Abstract | The Tatun Volcano Group (TVG), including more than twenty Quaternary volcanoes, is located 15 km north of Taipei, Taiwan. Prior to the late 1990s, the Tatun Volcano Group was considered an extinct or dormant feature based on the absence of historical evidence for eruptions and outdated dating methods. However, recent geochemical and geophysical studies indicated that the magma reservoir beneath the TVG is existing and the possibility of future eruptions is high. Most recently, a U/Pb age study suggested that the TVG magmatism was initiated around 3 Ma but more active ≤ 0.8 Ma with a flare up ≤ 0.35 Ma. Here, we systematically collected fresh andesite samples from the Tatun Volcano Group and dated these samples by using high-precision 40Ar/39Ar technique. Our preliminary study for one sample collected from Chihsingshan, the highest mountain of this area, yielded an age of 86 ± 4 ka (2 sigma errors). This study, for the first time, provided a precise age for the lava flow in the TVG. Our result refuted the widely accepted age model for the Tatun Volcano Group and suggested that the eruption history should be re-appraised. [This study is supported by HKU Science Faculty RAE Improvement Fund.] |
Description | Oral Presentation: Session SE: Solid Earth Sciences (Primary) - SE12: Volcanic Activity from the Mantle to the Atmosphere: Measuring, Monitoring, and Modeling Processes, Interactions, Products, and Impacts - paper SE12-A001 |
Persistent Identifier | http://hdl.handle.net/10722/304121 |
DC Field | Value | Language |
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dc.contributor.author | Chang, S | - |
dc.contributor.author | Chu, M | - |
dc.date.accessioned | 2021-09-23T08:55:31Z | - |
dc.date.available | 2021-09-23T08:55:31Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Asia Oceania Geosciences Society (AOGS) 18th Annual Meeting, Virtual Meeting, Singapore, 1-6 August 2021 | - |
dc.identifier.uri | http://hdl.handle.net/10722/304121 | - |
dc.description | Oral Presentation: Session SE: Solid Earth Sciences (Primary) - SE12: Volcanic Activity from the Mantle to the Atmosphere: Measuring, Monitoring, and Modeling Processes, Interactions, Products, and Impacts - paper SE12-A001 | - |
dc.description.abstract | The Tatun Volcano Group (TVG), including more than twenty Quaternary volcanoes, is located 15 km north of Taipei, Taiwan. Prior to the late 1990s, the Tatun Volcano Group was considered an extinct or dormant feature based on the absence of historical evidence for eruptions and outdated dating methods. However, recent geochemical and geophysical studies indicated that the magma reservoir beneath the TVG is existing and the possibility of future eruptions is high. Most recently, a U/Pb age study suggested that the TVG magmatism was initiated around 3 Ma but more active ≤ 0.8 Ma with a flare up ≤ 0.35 Ma. Here, we systematically collected fresh andesite samples from the Tatun Volcano Group and dated these samples by using high-precision 40Ar/39Ar technique. Our preliminary study for one sample collected from Chihsingshan, the highest mountain of this area, yielded an age of 86 ± 4 ka (2 sigma errors). This study, for the first time, provided a precise age for the lava flow in the TVG. Our result refuted the widely accepted age model for the Tatun Volcano Group and suggested that the eruption history should be re-appraised. [This study is supported by HKU Science Faculty RAE Improvement Fund.] | - |
dc.language | eng | - |
dc.relation.ispartof | AOGS (Asia Oceania Geosciences Society) 18th Annual Meeting, 2021 | - |
dc.title | Surprisingly young age for Chihsingshan in Taipei | - |
dc.type | Conference_Paper | - |
dc.identifier.email | Chang, S: suchin@hku.hk | - |
dc.identifier.authority | Chang, S=rp01478 | - |
dc.identifier.hkuros | 325415 | - |