Titill: | Variance of the Flexure Model Predictions With Rejuvenated Volcanism at Kīlauea Point, Kaua‘i, Hawai‘i |
Höfundur: |
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Útgáfa: | 2018-09-04 |
Tungumál: | Enska |
Umfang: | 121 |
Háskóli/Stofnun: | Háskóli Íslands University of Iceland |
Svið: | Verkfræði- og náttúruvísindasvið (HÍ) School of Engineering and Natural Sciences (UI) |
Deild: | Jarðvísindadeild (HÍ) Faculty of Earth Sciences (UI) |
Birtist í: | Frontiers in Earth Science;6 |
ISSN: | 2296-6463 |
DOI: | 10.3389/feart.2018.00121 |
Efnisorð: | Rejuvenated volcanism; Volcanic succession; Geochronology; Phreatomagmatic; Hawai‘i; Jarðmöttull; Eldvirkni; Eldgos |
URI: | https://hdl.handle.net/20.500.11815/1286 |
Tilvitnun:Thordarson, T., & Garcia, M. O. (2018). Variance of the Flexure Model Predictions With Rejuvenated Volcanism at Kīlauea Point, Kaua‘i, Hawai‘i. Frontiers in Earth Science, 6(121). doi:10.3389/feart.2018.00121
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Útdráttur:The origin of rejuvenated volcanism on mantle plume related oceanic islands remains
controversial. One commonly cited model is decompressional melting related to plate
flexure from the rapid loading of the lithosphere by the formation of a shield volcano
above the plume stem. This model provides testable predictions about the timing and
subsidence history of the island. Here we evaluate the flexure model by examining
the products of three well dated rejuvenation stage eruptions at K¯ılauea Point, Kaua‘i,
(Hawaii); the 2.65 ± 0.35 Ma Mok¯ olea Point lava, 1.67 ¯ ± 0.11 Ma for Crater Hill tuff
cone and 0.69 ± 0.03 Ma for K¯ılauea Point lava events. These eruptions record the
flexure of the island over a 2 Ma period, the longest sequence of rejuvenated volcanism
within the Hawaiian Islands. These three eruptions, including two subaerial flows (the
Mok¯ olea Point and K ¯ ¯ılauea Point lavas) and the only phreatomagmatic vent structure
on Kaua‘i (the Crater Hill tuff cone), document the progressive sinking and uplift of the
island related to sea level as the island drifted away from the Hawaiian hot spot at
∼10 cm/year. The timing of volcanism and the elevation of K¯ılauea Point relative to
sea level are inconsistent with the predictions of the flexural melting model. These new
results indicate that decompression melting cannot be the sole driver for rejuvenated
volcanism on Kaua‘i. Additional explanations are needed to account for the timing and
volume of rejuvenated volcanism in Hawai‘i
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Athugasemdir:Publisher's version (útgefin grein)
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Leyfi:This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
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