DOI: 10.1002/grl.50633
论文题名: Intrusive dike complexes, cumulate cores, and the extrusive growth of Hawaiian volcanoes
作者: Flinders A.F. ; Ito G. ; Garcia M.O. ; Sinton J.M. ; Kauahikaua J. ; Taylor B.
刊名: Geophysical Research Letters
ISSN: 0094-8814
EISSN: 1944-8545
出版年: 2013
卷: 40, 期: 13 起始页码: 3367
结束页码: 3373
语种: 英语
英文关键词: cumulate
; extrusive
; gravity
; Hawaii
; intrusive
; magma chamber
Scopus关键词: cumulate
; extrusive
; Hawaii
; intrusive
; Magma chamber
; Hydraulic structures
; Silicate minerals
; Surveys
; Volcanoes
; Gravitation
; cumulate
; dike
; extrusion
; field survey
; gravity anomaly
; gravity field
; gravity survey
; magma chamber
; rift zone
; volcanic island
; Hawaii [United States]
; Hawaiian Islands
; Kaena Ridge
; Kauai
; Pacific Ocean
; United States
; Ena
英文摘要: The Hawaiian Islands are the most geologically studied hot-spot islands in the world yet surprisingly, the only large-scale compilation of marine and land gravity data is more than 45 years old. Early surveys served as reconnaissance studies only, and detailed analyses of the crustal-density structure have been limited. Here we present a new chain-wide gravity compilation that incorporates historical island surveys, recently published work on the islands of Hawai'i, Kaua'i, and Ni'ihau, and >122,000 km of newly compiled marine gravity data. Positive residual gravity anomalies reflect dense intrusive bodies, allowing us to locate current and former volcanic centers, major rift zones, and a previously suggested volcano on Ka'ena Ridge. By inverting the residual gravity data, we generate a 3-D view of the dense, intrusive complexes and olivine-rich cumulate cores within individual volcanoes and rift zones. We find that the Hāna and Ka'ena ridges are underlain by particularly high-density intrusive material (>2.85 g/cm3) not observed beneath other Hawaiian rift zones. Contrary to previous estimates, volcanoes along the chain are shown to be composed of a small proportion of intrusive material (<30% by volume), implying that the islands are predominately built extrusively. Key Points A new compilation of marine and land gravity data in the Hawaiian islands We calculate volumes of intrusive complexes and cumulate cores for all volcanoes The majority of the islands (>30%) are built through extrusive flows ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880836026&doi=10.1002%2fgrl.50633&partnerID=40&md5=3c1b84d8b571295c3f4168989963b7f6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6078
Appears in Collections: 气候减缓与适应
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作者单位: Graduate School of Oceanography, University of Rhode Island, 215 S. Ferry Rd., Narragansett, RI 02882, United States
Recommended Citation:
Flinders A.F.,Ito G.,Garcia M.O.,et al. Intrusive dike complexes, cumulate cores, and the extrusive growth of Hawaiian volcanoes[J]. Geophysical Research Letters,2013-01-01,40(13).