Cyclic growth and mass wasting of submarine Los Frailes lava flow and dome complex in Cabo de Gata, SE Spain

Carles Soriano, Nancy R Riggs, Guido Giordano, Massimiliano Porreca, Sandro Conticelli

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The Los Frailes Formation lava-flow and dome complex is a Miocene succession that is part of the Cabo de Gata volcanic zone of SE Spain. The complex comprises dominantly dacitic, subaqueous dome rocks and interstratified sedimentary horizons emplaced over a few tens of thousands of years. Facies of the Los Frailes Formation include coherent lava, in-situ hyaloclastite, locally with microfossil-bearing siltstone matrix, pumiceous and block-rich tuff, and massive monomict breccia and megabreccia, in which clasts are locally several metres in diameter. The monomict megabreccias display both "block facies" and "matrix facies" architecture and show internal deformation at the block-matrix contacts. They are inferred to have derived from debris avalanches. Facies are divided into four volcanic units separated by fossiliferous marine sedimentary units emplaced during hiatuses in volcanism. The Los Frailes Formation lava-flow and dome complex were emplaced in a shallow setting that may have included emergent areas. Lava flows and the margins of dome edifices interacted with sea water to form hyaloclastite, and pyroclastic currents deposited pumiceous materials. Sector collapse of marine domes fed small-volume debris avalanches with generally the same facies and distribution of facies as the larger-scale equivalents on which traditional models are built.

Original languageEnglish (US)
Pages (from-to)72-86
Number of pages15
JournalJournal of Volcanology and Geothermal Research
Volume231-232
DOIs
StatePublished - Jun 15 2012

Fingerprint

lava dome
mass wasting
Domes
Spain
lava
domes
lava flow
hyaloclastite
dome
debris avalanche
debris
Debris
avalanches
volcanology
Bearings (structural)
matrices
matrix
megabreccia
breccia
sea water

Keywords

  • Debris avalanche
  • Pumice flow
  • Sector collapse
  • Submarine domes

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Cyclic growth and mass wasting of submarine Los Frailes lava flow and dome complex in Cabo de Gata, SE Spain. / Soriano, Carles; Riggs, Nancy R; Giordano, Guido; Porreca, Massimiliano; Conticelli, Sandro.

In: Journal of Volcanology and Geothermal Research, Vol. 231-232, 15.06.2012, p. 72-86.

Research output: Contribution to journalArticle

Soriano, Carles ; Riggs, Nancy R ; Giordano, Guido ; Porreca, Massimiliano ; Conticelli, Sandro. / Cyclic growth and mass wasting of submarine Los Frailes lava flow and dome complex in Cabo de Gata, SE Spain. In: Journal of Volcanology and Geothermal Research. 2012 ; Vol. 231-232. pp. 72-86.
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