2009/04/27 by Luigina Vezzoli, Valerio Acocella · 3 citations
Social Sciences · Earth and Planetary Sciences · #Pacific and Southeast Asian Studies #Geology and Paleoclimatology Research #Island Studies and Pacific Affairs #Citation #Hotspot (geology) #Download #Icon #Volcanism #History #Library science #Geography #Computer science #World Wide Web #Geology #Paleontology #Tectonics
paper · doi:10.1130/b26470.1
openalex publication_date 2009/04/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/13
Research Article| May 01, 2009 Easter Island, SE Pacific: An end-member type of hotspot volcanism Luigina Vezzoli; Luigina Vezzoli † 1Università degli Studi dell'Insubria, Dipartimento di Scienze Chimiche e Ambientali, via Valleggio 11, 22100 Como, Italy †E-mail: [email protected] Search for other works by this author on: GSW Google Scholar Valerio Acocella Valerio Acocella ‡ 2Università degli Studi di Roma Tre, Dipartimento di Scienze Geologiche, Largo S.L. Murialdo 1, 00146 Roma, Italy ‡E-mail: [email protected] Search for other works by this author on: GSW Google Scholar GSA Bulletin (2009) 121 (5-6): 869–886. https://doi.org/10.1130/B26470.1 Article history received: 24 May 2008 rev-recd: 03 Sep 2008 accepted: 08 Sep 2008 first online: 03 Oct 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Luigina Vezzoli, Valerio Acocella; Easter Island, SE Pacific: An end-member type of hotspot volcanism. GSA Bulletin 2009;; 121 (5-6): 869–886. doi: https://doi.org/10.1130/B26470.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Easter Island (Rapa Nui, Chile) is an intraoceanic volcanic island on the Easter hotspot, ~350 km E of the Eastern Pacific Rise. We match new field data with previously published age and petrochemical data to reconstruct the general evolution of the Island. This consists of three main volcanoes (Poike, Rano Kau, and the larger Terevaka), which experienced an overall similar and nearly coeval evolution, characterized by two periods: (1) buildup of a basaltic shield, culminating in the development of a summit caldera and the emission of more evolved highly porphyritic lavas (ca. 0.78–0.3 Ma); and (2) rifting along the shield flanks, by means of fissure eruptions (0.24–0.11 Ma). The trend of most eruptive fissures, NNE-SSW to NE–SW, appears to be controlled by the ~NE-SW elongated, emerged, and submerged morphology of the island. However, while the fissure-forming period at Rano Kau and Poike appears to be associated with reduced magma supply to the reservoir, at Terevaka it is characterized by the arrival of new basic magma, rejuvenating the system. The comparison to other intraoceanic volcanic islands suggests that, because of its tectonomagmatic features (low eruptive rate, scattered rift zones, and scarce lateral collapses), Easter Island represents an end-member type of hotspot volcano that is contrary to Hawaii, which represents the opposite end member. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.