Contributions to the chronology of the Basal Complex of Fuerteventura, Canary Islands

Balogh, Kadosa; Ahijado, A.; Casillas, Ramón; Fernández, Carlos

doi:10.1016/s0377-0273(99)00008-6

Cited by 56 publications

(32 citation statements)

References 19 publications

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“…Apatite fissiontrack ages are 12.0 ± 2.1 and 14.0 ± 2.1 Ma, and zircon fission-track age are 15.6 ± 3.6 and 19.3 ± 2.3 Ma ( Table 3). The hornblende and whole rock K-Ar ages (18.7-21.0 Ma) reported by Balogh et al (1999) confirm that the intrusives are significantly younger than Late Cretaceous. It is interesting to observe that the ages obtained for the two dykes (Fu-03-07, Fu-04-07) also fall into the same time-frame.…”

Section: Discussionsupporting

confidence: 58%

“…2) contains: (a) oceanic crust and sedimentary units of Mesozoic age that are overlain by volcano-clastic rocks (Fúster et al 1968;Robertson and Bernoulli 1982;Steiner et al 1998) and are intruded by Oligocene to Early Miocene ultra-alkaline plutonic rocks (Balogh et al 1999), (b) a suite of late Oligocene to early Miocene alkaline ultramafic to intermediate intrusions (Cantagrel et al 1993;Coello et al 1992;Feraud et al 1985), and (c) A very dense sheeted dyke complex of early Miocene age. The latter is associated with (b) and intruding (a).…”

Section: Geological Settingmentioning

confidence: 99%

“…The time of the beginning of magmatic activity in the Canary archipelago and hence the onset of the islands growth has been a subject of interest for a long time. Although some authors dated the onset of the magmatism to late Cretaceous-early Palaeocene (Balogh et al 1999;Le Bas et al 1986;Robertson and Stillman 1979) others claimed that it was initiated in the Oligocene (Cantagrel et al 1993;Fúster et al 1980;Muñoz et al 2005;Sagredo et al 1996). Ancochea et al (1996) showed that massive shield stage volcanoes were built by subsequent subaerial volcanism in the early Miocene.…”

Section: Introductionmentioning

confidence: 99%

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Reconstruction of the differentiated long-term exhumation history of Fuerteventura, Canary Islands, Spain, through fission-track and (U-Th–Sm)/He data

Wipf

Glasmacher

Stöckli

et al. 2009

Int J Earth Sci (Geol Rundsch)

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Miocene Intrusives and Lower Cretaceous siliciclastic sedimentary rocks from the Basal Complex in western-Fuerteventura were analyzed with low-temperature thermochronometric methods such as fission-track, and (UTh-Sm)/He dating, in order to reveal the evolution of the island's exhumation history. The obtained thermochronometric data yields a very slow rate of cooling in the order of 1.5-3°C/Myr from *50 to 20 Ma for the Early Cretaceous siliciclastic rocks. These sedimentary units have never been heated significantly above 240°C after deposition and still record the submarine onset of the island's formation in the Eocene. Intrusive bodies associated with the early Miocene magmatic activity of the central volcanic complex of the island show rapid initial cooling rates of 50-70°C/Myr from *20 to 14 Ma. Contemporaneous with the intrusions the cooling rate of the Cretaceous sedimentary units increased to 25-35°C/Myr and it is inferred that this increase is associated with enhanced uplift and erosion of the Central Volcanic Complex. After *14 Ma rates slowed down to 3-6°C/Myr. Palaeosols overlying the sedimentary units are themselves covered by Pliocene basalt flows and reveal that the sedimentary rocks reached the surface before *5 Ma. The thermochronometric data obtained in this study for central Fuerteventura is difficult to reconcile with the cooling history derived from previously obtained fissiontrack and K-Ar data from the north-western part of the island. This inconsistency is likely to indicate that the exhumation history of Fuerteventura is more complex and regionally subdivided than previously believed.

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Section: Discussionsupporting

confidence: 58%

Section: Geological Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reconstruction of the differentiated long-term exhumation history of Fuerteventura, Canary Islands, Spain, through fission-track and (U-Th–Sm)/He data

Wipf

Glasmacher

Stöckli

et al. 2009

Int J Earth Sci (Geol Rundsch)

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“…1) may have a simple answer: Only the subaerial island tips of these giant seamounts are young, their seamount roots can be Early Cretaceous or older. As yet, only a few seamount sub-structures were revealed, however, by falling sea levels (Selvagen: >29 Ma8), by tectonic uplift (Fuerteventura: >70 Ma242526) or by dredging (El Hierro: >133 Ma). The proof of widespread Late Jurassic to Mid Cretaceous seamount volcanism in the CISP has significant consequences for seismic and sedimentary facies models27 and mantle convection models, which were based on an initiation of CISP volcanism and supply of volcanic sediments to basins in the Late Cretaceous to Early Paleogene.…”

Section: Discussionmentioning

confidence: 97%

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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“…Canaries: Carbonatite dikelets are reported only from Fuerteventura (Barrera et al 1981, Balogh et al 1999Hoernle et al 2002).…”

Section: Carbonatites On the Cape Verdes And Canaries Melt Inclusionsmentioning

confidence: 99%

Carbonatites in oceanic hotspots

Schmidt¹,

Weidendorfer

2018

Geology

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SUPPLEMENTARY MATERIAL METHODSData were compiled from the pre-sorted georoc database ocean island files (http://georoc.mpchmainz.gwdg.de/georoc/). Hot spots such as Aetna or Samoa with geotectonically complex situations and possible direct interference with subduction were avoided; otherwise we used those with sufficiently large data sets. Each file was filtered for analyses with 95-101.5 wt% totals, samples outside this range or listed as altered were excluded. All bulk rock compositions are then normalized to 100 wt% total on a volatile free basis with all Fe as FeO.The histogram of total alkalis for extrusives shows a clear cut-off to <1.4 wt% K 2 O+Na 2 O. Of e.g. 9'000 extrusives of the Hawaiian hotspot only 24 are below this values, these are essentially from three publications (without geographical coherence), suggesting that these rocks were altered or possibly have an analytical problem; this is corroborated by a K 2 O/Na 2 O ranging from 0.01 to 2 for these 24 samples. We have hence excluded all rocks with <1.4 wt% Na 2 O+K 2 O. Similarly, we did not accept trace element concentrations measured by XRF that are below 5-15 ppm (depending on the element).Within each ocean island, rocks were sorted for (i) Those with X Mg >0.77 and/or Ni>650 ppm, this group is mostly olivine cumulative and was excluded from all plots. (ii) Primitive melts were designated when X Mg =0.77-0.65, which corresponds to equilibrium with olivine of Fo 92-88 at 5-15 mol% Fe 3+ (of Fe tot ), and Ni=150-650 ppm, corresponding to roughly 2000-4500 ppm Ni in mantle olivine (note that the K D olivine/melt of Ni strongly depends on temperature, hence this range is chosen rather large). (iii) To enlarge the dataset, rocks with 0.55100 analyses were retained, the dataset sorted for the above criteria contains 124-198 analyses for Pitcairn, Ascension, St. Helena and Tristan da Cunha; 242-331 for GSA Data Repository 2018136

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Contributions to the chronology of the Basal Complex of Fuerteventura, Canary Islands

Cited by 56 publications

References 19 publications

Reconstruction of the differentiated long-term exhumation history of Fuerteventura, Canary Islands, Spain, through fission-track and (U-Th–Sm)/He data

Reconstruction of the differentiated long-term exhumation history of Fuerteventura, Canary Islands, Spain, through fission-track and (U-Th–Sm)/He data

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

Carbonatites in oceanic hotspots

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