DataSheet1_A crustal LVZ in Iceland revealed by ambient noise multimodal surface wave tomography.docx
The crustal low-velocity zone (LVZ), an important anomaly found in some regional structures of Iceland, is still absent in the Icelandic average velocity structure due to limitations of tomography methods. Using stations from the HOTSPOT experiment and other supplemental stations throughout Iceland,...
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ftfrontimediafig:oai:figshare.com:article/21219536 2024-09-15T18:13:17+00:00 DataSheet1_A crustal LVZ in Iceland revealed by ambient noise multimodal surface wave tomography.docx Sen Zhang Gongheng Zhang Xuping Feng Zhengbo Li Lei Pan Jiannan Wang Xiaofei Chen 2022-09-28T05:06:41Z https://doi.org/10.3389/feart.2022.1008354.s001 https://figshare.com/articles/dataset/DataSheet1_A_crustal_LVZ_in_Iceland_revealed_by_ambient_noise_multimodal_surface_wave_tomography_docx/21219536 unknown doi:10.3389/feart.2022.1008354.s001 https://figshare.com/articles/dataset/DataSheet1_A_crustal_LVZ_in_Iceland_revealed_by_ambient_noise_multimodal_surface_wave_tomography_docx/21219536 CC BY 4.0 Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change Iceland crust S-wave low-velocity zone ambient noise tomography frequency-Bessel transform method Dataset 2022 ftfrontimediafig https://doi.org/10.3389/feart.2022.1008354.s001 2024-08-19T06:19:50Z The crustal low-velocity zone (LVZ), an important anomaly found in some regional structures of Iceland, is still absent in the Icelandic average velocity structure due to limitations of tomography methods. Using stations from the HOTSPOT experiment and other supplemental stations throughout Iceland, we apply the frequency-Bessel transform method (F-J method) to extract the first two mode dispersion curves from ambient noise data. We obtain an average S-wave velocity (Vs) model of Iceland down to 120 km depth, where two LVZs at depths of 12–22 km and below 55 km are found. The shallow LVZ, whose rationalities are justified using theoretical dispersion curves of certain models to recover themselves, may improve the understanding of the Icelandic average crust. Furthermore, our model shows better representativeness by comparing travel time residuals of the primary wave between observed and synthetic data predicted using different average velocity models. Based on the variations of the Vs gradient, the Icelandic crust with an average thickness of 32 km is divided into the upper crust (0–10 km), middle crust (10–22 km), and lower crust (22–32 km). The asthenosphere starts from the deeper LVZ at 55 km depth, potentially indicating the relatively concentrated melt in this depth range. In this study, crustal LVZs are revealed both in a volcanic active zone and a non-volcanic zone, which may also suggest the LVZ in the average model has more complex origins than the high-temperature zone beneath the central volcanoes. The prevalent thick-cold crustal model of Iceland, considered to rule out the existence of a broad region of partial melt in the crust, also strengthens the possibility of diverse origins. The variations in petrology may also contribute to the crustal LVZ in the average model. Dataset Iceland Frontiers: Figshare |
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Open Polar |
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Frontiers: Figshare |
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ftfrontimediafig |
language |
unknown |
topic |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change Iceland crust S-wave low-velocity zone ambient noise tomography frequency-Bessel transform method |
spellingShingle |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change Iceland crust S-wave low-velocity zone ambient noise tomography frequency-Bessel transform method Sen Zhang Gongheng Zhang Xuping Feng Zhengbo Li Lei Pan Jiannan Wang Xiaofei Chen DataSheet1_A crustal LVZ in Iceland revealed by ambient noise multimodal surface wave tomography.docx |
topic_facet |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change Iceland crust S-wave low-velocity zone ambient noise tomography frequency-Bessel transform method |
description |
The crustal low-velocity zone (LVZ), an important anomaly found in some regional structures of Iceland, is still absent in the Icelandic average velocity structure due to limitations of tomography methods. Using stations from the HOTSPOT experiment and other supplemental stations throughout Iceland, we apply the frequency-Bessel transform method (F-J method) to extract the first two mode dispersion curves from ambient noise data. We obtain an average S-wave velocity (Vs) model of Iceland down to 120 km depth, where two LVZs at depths of 12–22 km and below 55 km are found. The shallow LVZ, whose rationalities are justified using theoretical dispersion curves of certain models to recover themselves, may improve the understanding of the Icelandic average crust. Furthermore, our model shows better representativeness by comparing travel time residuals of the primary wave between observed and synthetic data predicted using different average velocity models. Based on the variations of the Vs gradient, the Icelandic crust with an average thickness of 32 km is divided into the upper crust (0–10 km), middle crust (10–22 km), and lower crust (22–32 km). The asthenosphere starts from the deeper LVZ at 55 km depth, potentially indicating the relatively concentrated melt in this depth range. In this study, crustal LVZs are revealed both in a volcanic active zone and a non-volcanic zone, which may also suggest the LVZ in the average model has more complex origins than the high-temperature zone beneath the central volcanoes. The prevalent thick-cold crustal model of Iceland, considered to rule out the existence of a broad region of partial melt in the crust, also strengthens the possibility of diverse origins. The variations in petrology may also contribute to the crustal LVZ in the average model. |
format |
Dataset |
author |
Sen Zhang Gongheng Zhang Xuping Feng Zhengbo Li Lei Pan Jiannan Wang Xiaofei Chen |
author_facet |
Sen Zhang Gongheng Zhang Xuping Feng Zhengbo Li Lei Pan Jiannan Wang Xiaofei Chen |
author_sort |
Sen Zhang |
title |
DataSheet1_A crustal LVZ in Iceland revealed by ambient noise multimodal surface wave tomography.docx |
title_short |
DataSheet1_A crustal LVZ in Iceland revealed by ambient noise multimodal surface wave tomography.docx |
title_full |
DataSheet1_A crustal LVZ in Iceland revealed by ambient noise multimodal surface wave tomography.docx |
title_fullStr |
DataSheet1_A crustal LVZ in Iceland revealed by ambient noise multimodal surface wave tomography.docx |
title_full_unstemmed |
DataSheet1_A crustal LVZ in Iceland revealed by ambient noise multimodal surface wave tomography.docx |
title_sort |
datasheet1_a crustal lvz in iceland revealed by ambient noise multimodal surface wave tomography.docx |
publishDate |
2022 |
url |
https://doi.org/10.3389/feart.2022.1008354.s001 https://figshare.com/articles/dataset/DataSheet1_A_crustal_LVZ_in_Iceland_revealed_by_ambient_noise_multimodal_surface_wave_tomography_docx/21219536 |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
doi:10.3389/feart.2022.1008354.s001 https://figshare.com/articles/dataset/DataSheet1_A_crustal_LVZ_in_Iceland_revealed_by_ambient_noise_multimodal_surface_wave_tomography_docx/21219536 |
op_rights |
CC BY 4.0 |
op_doi |
https://doi.org/10.3389/feart.2022.1008354.s001 |
_version_ |
1810450922863591424 |