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This work was supported by projects of the Spanish Science Minister CGL2006-06290/BT and CGL2012-32135-BTE. The bathymetric data products used have been derived from the EMODnet Bathymetry portal. We acknowledge to Dr. A. Tibaldi and Dr. M. Neri for their reviews the first version of the work, as well as the detailed reviews of Dr. C. Fernandez and an anonymous reviewer, which greatly improved the manuscript.

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Marquez, ACorresponding AuthorHerrera, RAuthorIzquierdo, TAuthorMartin-Gonzalez, FAuthorLopez, IAuthorMartin-Velazquez, SAuthor

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September 27, 2022
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The dyke swarms of the Old Volcanic Edifice of La Gomera (Canary Islands): Implications for the origin and evolution of volcanic rifts in oceanic island volcanoes

Publicated to:Global And Planetary Change. 171 255-272 - 2018-12-01 171(), DOI: 10.1016/j.gloplacha.2017.12.004

Authors: Marquez, Alvaro; Herrera, Raquel; Izquierdo, Tatiana; Martin-Gonzalez, Fidel; Lopez, Ivan; Martin-Velazquez, Silvia

Affiliations

Univ Atacama, Dept Geol, Av Copayacu 485, Copiapo, Chile - Author
Univ Rey Juan Carlos, ESCET, Area Geol, C Tulipan S-N, Madrid 28933, Spain - Author

Abstract

Rift zones are fundamental features in oceanic island volcanoes, although their origin is still controversial, especially at the Canary Islands where the role of volcanic spreading is under debate. For this reason, we have performed a field study of > 400 dykes at 20 outcrops in the Lower Old Edifice and 2 outcrops of the Upper Old edifice of La Gomera Island, identifying different dyke swarms. We propose the development of an unnoticed EW volcanic rift (Hermigua Rift) restricted to the Lower Old Edifice East flank, with up to 25% of extension and structural characteristics compatible with the spreading of the edifice over a basal weak decollement. Contemporaneously a dyke swarm of outward-dipping dykes intruded at the W-SW zones, indicating a progressive radial sliding of the edifice. This asymmetric volcano structural pattern suggests that volcano stresses were predominately local in origin, probably related to the buttressing effect of the neighbor contemporaneous Roque del Conde edifice (Tenerife Island). Additionally, we have deduced two different rift zones (NW-SE Enchereda and N-S Erque rifts) during the growth of the Upper Old Edifice, evidencing that La Gomera rifts were dynamic evolving structures. The structure and regional setting of the Upper Old Edifice rifts suggest a change to a predominance of regional stresses. Our results have implications for the understanding of the origin and evolution of rifts at oceanic island volcanoes, since: 1) confirm a principal role for volcanic spreading processes; 2) support that the location of neighbor volcanic loads strongly influences rifts development; and 3) suggests, in some situations, a possible main role for the regional stress field.

Keywords

Basaltic volcanosBuildingsCanary islandsCone sheetDeformation structuresDike swarmDyke swarmDyke swarmsEl-hierroExtensionFlank instabilityGomeraIslandIsle-of-skyeLa gomeraLanthanumOceanic island volcanoesOceanic islandsRift zoneSanta cruz de tenerife [(prv) canary islands]Sheet intrusionsSlidingSpainStructural controlStructural geologyTenerifeVolcanic islandVolcanic riftVolcanic riftsVolcanic spreadingVolcanoVolcanoesZone

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal Global And Planetary Change due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2018, it was in position 23/196, thus managing to position itself as a Q1 (Primer Cuartil), in the category Geosciences, Multidisciplinary.

Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.

Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2025-07-21:

  • WoS: 4
  • Scopus: 4

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-07-21:

  • The use, from an academic perspective evidenced by the Altmetric agency indicator referring to aggregations made by the personal bibliographic manager Mendeley, gives us a total of: 23.
  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 23 (PlumX).

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

  • The Total Score from Altmetric: 1.25.
  • The number of mentions on the social network X (formerly Twitter): 3 (Altmetric).

Leadership analysis of institutional authors

This work has been carried out with international collaboration, specifically with researchers from: Chile.

There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (Márquez Barroso, Agustina) and Last Author (Martín Velázquez, Silvia).

the author responsible for correspondence tasks has been Márquez Barroso, Agustina.