DOI: 10.1002/grl.51003
论文题名: The shallow structure beneath Montserrat (West Indies) from new Bouguer gravity data
作者: Hautmann S. ; Camacho A.G. ; Gottsmann J. ; Odbert H.M. ; Syers R.T.
刊名: Geophysical Research Letters
ISSN: 0094-8471
EISSN: 1944-8202
出版年: 2013
卷: 40, 期: 19 起始页码: 5113
结束页码: 5118
语种: 英语
英文关键词: Bouguer map
; gravity inversion
; Montserrat
Scopus关键词: Bouguer gravity datum
; Gravity inversions
; High-density materials
; Low-density materials
; Montserrat
; Structural observations
; Subsurface density
; Volcaniclastic deposits
; Complex networks
; Domes
; Volcanoes
; Gravitation
; aggregation
; Bouguer anomaly
; data set
; observational method
; seismic tomography
; tectonic structure
; Leeward Islands [Lesser Antilles]
; Montserrat
; Soufriere Hills Volcano
英文摘要: Although the persistently active Soufrière Hills Volcano (Montserrat, West Indies) is one of the most extensively studied active stratovolcanoes, a local Bouguer gravity map of the volcano and the island of Montserrat has yet to be constructed. We collected 157 new gravity data, which we analyzed and inverted in order to constrain the island's subsurface density distribution. Our model results reveal high-density material beneath the centers of the extinct volcanic complexes - presumably related to exposed dome cores - while the volcanic flanks and the active Soufrière Hills Volcano are underlain by low-density material. Volcaniclastic deposits and subsurface melt aggregations, respectively, may explain these negative gravity anomalies. Our results are in good agreement with previous structural observations from seismic tomography; however, a higher spatial density of the gravity survey network has allowed us to additionally capture smaller, shallow-seated anomalies in the gravity field that relate to tectonic structures and fluvial filling deposits. Key Points First local Bouguer anomaly map of Montserrat from 157 new gravity data Data inversion provides high resolution of density contrasts at shallow depths Anomalies image old dome cores, volcaniclastic aprons and tectonic structures ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84885368177&doi=10.1002%2fgrl.51003&partnerID=40&md5=b3917bac66313b32b99d7e3d91be999b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5735
Appears in Collections: 气候减缓与适应
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作者单位: School of Earth Sciences, University of Bristol, WillsMemorial Bldg., Queens Rd., Bristol BS8 1RJ, United Kingdom
Recommended Citation:
Hautmann S.,Camacho A.G.,Gottsmann J.,et al. The shallow structure beneath Montserrat (West Indies) from new Bouguer gravity data[J]. Geophysical Research Letters,2013-01-01,40(19).