Chronostratigraphy of Gran Canaria

Bogaard, Paul van den; Schmincke, Hans‐Ulrich

doi:10.2973/odp.proc.sr.157.116.1998

Cited by 26 publications

(11 citation statements)

References 10 publications

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“…Note, this is ~3 m.y. older than the oldest subaerial “shield-stage” lavas of overlying Gran Canaria (~15 Ma17). …”

Section: Resultsmentioning

confidence: 99%

“…Seamount ages from this study plus additional data for Henry29, La Palma14, Fuerteventura242526, Amanay34, Selvagen, Conception, Dacia, Rybin, and Essaouira seamounts48. Oldest subaerial island ages (white) for Lanzarote and Fuerteventura12, Gran Canaria17, Tenerife10, La Gomera35, La Palma18, El Hierro13, and Selvagen8. Map base from NOAA (ETOPO1)36.…”

Section: Figurementioning

confidence: 99%

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The origin of the Canary Island Seamount Province - New ages of old seamounts

Bogaard

2013

Sci Rep

138

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The Canary Island Seamount Province forms a scattered hotspot track on the Atlantic ocean floor ~1300 km long and ~350 km wide, perpendicular to lithospheric fractures, and parallel to the NW African continental margin. New 40Ar/39Ar datings show that seamount ages vary from 133 Ma to 0.2 Ma in the central archipelago, and from 142 Ma to 91 Ma in the southwest. Combining 40Ar/39Ar ages with plate tectonic reconstructions, I find that the temporal and spatial distribution of seamounts is irreconcilable with a deep fixed mantle plume origin, or derivation from passive mantle upwelling beneath a mid-ocean ridge. I conclude that shallow mantle upwelling beneath the Atlantic Ocean basin off the NW African continental lithosphere flanks produced recurrent melting anomalies and seamounts from the Late Jurassic to Recent, nominating the Canary Island Seamount Province as oldest hotspot track in the Atlantic Ocean, and most long-lived preserved on earth.

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“…Note, this is ~3 m.y. older than the oldest subaerial “shield-stage” lavas of overlying Gran Canaria (~15 Ma17). …”

Section: Resultsmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

The origin of the Canary Island Seamount Province - New ages of old seamounts

Bogaard

2013

Sci Rep

138

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“…Pérez‐Torrado et al. , 1995, 1997; van den Bogaard & Schmincke, 1998; Guillou et al. , 2004) and the publication of detailed geological maps (e.g.…”

Section: Roque Nublo and The Sterilization Hypothesismentioning

confidence: 99%

“…Towards the end of this period the main shield volcano collapsed, forming the Caldera de Tejeda (e.g. van den Bogaard & Schmincke, 1998). Post‐caldera volcanism was characterized by intense and violent eruptions, resulting in large volumes of ignimbrites and silicic lavas.…”

Section: Roque Nublo and The Sterilization Hypothesismentioning

confidence: 99%

Life, death and fossilization on Gran Canaria – implications for Macaronesian biogeography and molecular dating

Anderson

Channing

Zamuner

2009

Journal of Biogeography

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The Canaries have recently served as a test‐bed island system for evaluating newly developed parametric biogeographical methods that can incorporate information from molecular phylogenetic dating and ages of geological events. To use such information successfully, knowledge of geological history and the fossil record is essential. Studies presenting phylogenetic datings of plant groups on oceanic islands often through necessity, but perhaps inappropriately, use the geological age of the oldest island in an archipelago as a maximum‐age constraint for earliest possible introductions. Recently published papers suggest that there is little chance of informative fossil floras being found on volcanic islands, and that nothing could survive violent periods of volcanic activity. One such example is the Roque Nublo period in Gran Canaria, which is assumed to have caused the extinction of the flora of the island (c. 5.3–3.7 Ma). However, recent investigations of Gran Canaria have identified numerous volcanic and sedimentological settings where plant remains are common. We argue, based on evidence from the Miocene–Pliocene rock and fossil records, that complete sterilization of the island is implausible. Moreover, based on fossil evidence, we conclude that the typical ecosystems of the Canary Islands, such as the laurisilva, the Pinus forest and the thermophilous scrubland, were already present on Gran Canaria during the Miocene–Pliocene. The fossil record we present provides new information, which may be used as age constraints in phylogenetic datings, in addition to or instead of the less reliable ages of island emergences or catastrophic events. We also suggest island environments that are likely to yield further fossil localities. Finally, we briefly review further examples of fossil floras of Macaronesia.

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“…The age and duration of the submarine growth phases of both islands are unknown. The subaerial volcanic/magmatic history of Gran Canaria started about 15 Ma and was divided into three main phases (McDougall and Schmincke 1976;Schmincke 1976Schmincke , 1982Schmincke , 1998Schmincke 1993a, 1993b;van den Bogaard and Schmincke 1998). The subaerial Miocene phase started with rapid formation of tholeiitic to weakly alkalic shield basalts.…”

Section: Geological Settingmentioning

confidence: 99%