Author:
Menéndez Inmaculada,Mangas José,Tauler Esperança,Barrón Vidal,Torrent José,Betancort Juan F.,Santana Ángelo,Recio José Manuel,Quevedo-González Luis A.,Alonso Ignacio,Méndez-Ramos Jorge
Abstract
AbstractThe island of Gran Canaria is regularly affected by dust falls due to its proximity to the Saharan desert. Climatic oscillations may affect the Saharan dust input to the island. Geochemical, mineralogical, and textural analysis was performed on a well-developed and representative early Pleistocene paleosol to examine Saharan dust contribution to Gran Canaria. Significant and variable Saharan dust content was identified in addition to weathering products such as iron oxides and clay minerals. Variations in quartz and iron oxide concentrations in the paleosol likely reflect different Saharan dust input in more/less-contrasted rhexistasic/biostatic climatic conditions. Linking the quartz content in Canarian soils, the Ingenio paleosol, and two Canarian loess-like deposits to different ages from the Quaternary, we hypothesized that the dust input should be lower (about 33–38%) throughout the early to middle Pleistocene than during the late Quaternary. The Saharan dust input to the Gran Canaria profile in the Pleistocene persisted in spite of climatic variations.
Publisher
Cambridge University Press (CUP)
Subject
General Earth and Planetary Sciences,Earth-Surface Processes,Arts and Humanities (miscellaneous)
Cited by
6 articles.
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1. Long-term African dust delivery to the eastern Atlantic Ocean from the Sahara and Sahel regions: Evidence from Quaternary paleosols on the Canary Islands, Spain;Quaternary Science Reviews;2021-08
2. Upper Quaternary coastal palaeoenvironments and palaeosea levels in Las Canteras beach, Gran Canaria (Canary Islands, Spain);Marine Geology;2020-11
3. Unravelling calcrete environmental controls in volcanic islands, Gran Canaria Island, Spain;Palaeogeography, Palaeoclimatology, Palaeoecology;2020-09
4. The antiquity of the Sahara Desert: New evidence from the mineralogy and geochemistry of Pliocene paleosols on the Canary Islands, Spain;Palaeogeography, Palaeoclimatology, Palaeoecology;2019-11
5. Distribution of REE-bearing minerals in felsic magmatic rocks and paleosols from Gran Canaria, Spain: Intraplate oceanic islands as a new example of potential, non-conventional sources of rare-earth elements;Journal of Geochemical Exploration;2019-09