Congo River Sand and the Equatorial Quartz Factory
Earth-Science Reviews 197 (2019) 102918 Contents lists available at ScienceDirect Earth-Science Reviews journal homepage: www.elsevier.com/locate/earscirev Congo River sand and the equatorial quartz factory T ⁎ Eduardo Garzantia, , Pieter Vermeeschb, Giovanni Vezzolia, Sergio Andòa, Eleonora Bottia, Mara Limontaa, Pedro Dinisc, Annette Hahnd, Daniel Baudete, Johan De Gravef, Nicole Kitambala Yayag a Laboratory for Provenance Studies, Department of Earth and Environmental Sciences, University of Milano-Bicocca, 20126 Milano, Italy b London Geochronology Centre, Department of Earth Sciences, University College London, London, WC1E 6BT, UK c Department of Earth Sciences, MARE – Marine and Environmental Sciences Centre, University of Coimbra, Portugal d MARUM Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany e Geodynamics & Mineral Resources, Royal Museum for Central Africa (RMCA), Leuvensesteenweg 13, 3080 Tervuren, Belgium f Department of Geology and Soil Science (WE13), MINPET, Ghent University, Krijgslaan 281/S8, WE13, B-9000 Gent, Belgium g CRGM Centre de Recherches Géologiques et Minières, 44, Av. de la Démocratie, Kinshasa-Gombe, Democratic Republic of Congo ARTICLE INFO ABSTRACT Keywords: A never solved problem in sedimentary petrology is the origin of sandstone consisting exclusively of quartz and Provenance analysis most durable heavy minerals. The Congo River offers an excellent test case to investigate under which tectonic, Equatorial weathering geomorphological, climatic, and geochemical conditions pure quartzose sand is generated today. In both upper U-Pb zircon geochronology and lowermost parts of the catchment, tributaries contain significant amounts of feldspars, rock fragments, or Zircon weatherability moderately stable heavy minerals pointing at the central basin as the main location of the “quartz factory”.
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