Reflection seismic investigations in the volcaniclastic apron of Gran Canaria and implications for its volcanic evolution

Thomas Funck, Thomas Dickmann, Roland Rihm, Sebastian Krastel, Holger Lykke-Andersen, Hans Ulrich Schmincke

Research output: Contribution to journalArticleResearchpeer-review

39 Citations (Scopus)

Abstract

High-resolution reflection seismic data obtained around Gran Canaria allow a detailed and consistent correlation of seismic reflectors of the northern and southern Canary Basins with the lithology drilled by DSDP Leg 47A SSE of Gran Canaria, as well as with major phases of volcanic activity on Gran Canaria as mapped onshore. Two prominent reflectors were chosen as marker horizons and correlated with the drilled lithology. The results indicate that reflector R7 above the Miocene volcaniclastic debris flows V1-V3 reflects the shield-building phase of Gran Canaria. Reflector R3 is interpreted as corresponding with the Pliocene Roque Nublo formation. The top of the massive island flank of Gran Canaria, defined by seismically chaotic facies, extends 44 to 72 km off the coast of Gran Canaria. West of Gran Canaria the flank of Tenerife onlaps the steeper and older flank of Gran Canaria, which, in turn, is onlapping the older flank of Fuerteventura to the east in a similar way. Erosional channels, which can also be traced up to 50 km from the area between Gran Canaria and Fuerteventura into the deeper northern basin, have been identified in the bathymetry. The data presented provide new detailed information for modelling the submarine and subaerial evolution of the central Canary Islands of Gran Canaria and Tenerife, i.e. the timing of their shield-building phases and later stages of major volcanic activity, as reflected by the position of prominent seismic reflectors in the seismic stratigraphy.

Original languageEnglish
Pages (from-to)519-536
Number of pages18
JournalGeophysical Journal International
Volume125
Issue number2
DOIs
Publication statusPublished - May 1996
Externally publishedYes

Keywords

  • Canary Islands
  • Seismic reflection
  • Volcanic activity

Programme Area

  • Programme Area 3: Energy Resources

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