Extent and Volume of Lava Flows Erupted at 9°50′N, East Pacific Rise in 2005–2006 From Autonomous Underwater Vehicle Surveys
Extent and Volume of Lava Flows Erupted at 9°50′N, East Pacific Rise in 2005–2006 From Autonomous Underwater Vehicle Surveys
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根据自主水下航行器调查,2005 年至 2006 年北纬 9°50°2 处喷发的熔岩流的范围和体积以及东太平洋上升
DOI:
10.1029/2021gc010213
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
McDermott, Jill M.
中科院分区:
文献类型:
--
作者:
Wu, Jyun‐Nai;Parnell‐Turner, Ross;Fornari, Daniel J.;Kurras, Gregory;Berrios‐Rivera, Natalia;Barreyre, Thibaut;McDermott, Jill M.
Seafloor volcanic eruptions are difficult to directly observe due to lengthy eruption cycles and the remote location of mid‐ocean ridges. Volcanic eruptions in 2005–2006 at 9°50′N on the East Pacific Rise have been well documented, but the lava volume and flow extent remain uncertain because of the limited near‐bottom bathymetric data. We present near‐bottom data collected during 19 autonomous underwater vehicle (AUV)Sentrydives at 9°50′N in 2018, 2019, and 2021. The resulting 1 m‐resolution bathymetric grid and 20 cm‐resolution sidescan sonar images cover 115 km2, and span the entire area of the 2005–2006 eruptions, including an 8 km2pre‐eruption survey collected with AUVABEin 2001. Pre‐ and post‐eruption surveys, combined with sidescan sonar images and seismo‐acoustic impulsive events recorded during the eruptions, are used to quantify the lava flow extent and to estimate changes in seafloor depth caused by lava emplacement. During the 2005–2006 eruptions, lava flowed up to ∼3 km away from the axial summit trough, covering an area of ∼20.8 km2; ∼50% larger than previously thought. Where pre‐ and post‐eruption surveys overlap, individual flow lobes can be resolved, confirming that lava thickness varies from ∼1 to 10 m, and increases with distance from eruptive fissures. The resulting lava volume estimate indicates that ∼57% of the melt extracted from the axial melt lens probably remained in the subsurface as dikes. These observations provide insights into recharge cycles in the subsurface magma system, and are a baseline for studying future eruptions at the 9°50′N area.
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影响因子:
2.8
作者:
Wilcock, William;Dziak, Robert;Tolstoy, Maya;Chadwick, William;Nooner, Scott;Bohnenstiel, DelWayne;Caplan-Auerbach, Jacqueline;Waldhauser, Felix;Arnulf, Adrien;Ballard, Christian
通讯作者:
Ballard, Christian
影响因子:
5.3
作者:
K. Macdonald;P. J. Fox
通讯作者:
P. J. Fox
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
J. Gardner;B. Jackson;H. Gonnermann;S. Soule
通讯作者:
S. Soule
DOI:
--
发表时间:
1983
期刊:
影响因子:
--
作者:
E. Rosencrantz
通讯作者:
E. Rosencrantz
影响因子:
3.5
作者:
Wessel, P.;Luis, J. F.;Tian, D.
通讯作者:
Tian, D.