干旱区生态环境知识资源中心(Arid): Cenozoic to modern-day source to sink systems of Senegal: A record of provenance, transport, recycling and climate controls

Arid

DOI	10.1016/j.jafrearsci.2021.104150
	Cenozoic to modern-day source to sink systems of Senegal: A record of provenance, transport, recycling and climate controls
	Mounteney, Ian; Casson, Max; Rushton, Jeremy; Millar, Ian; Dethie, Ndiaye; Redfern, Jonathan
通讯作者	Mounteney, I (corresponding author), Univ Manchester, Dept Earth & Environm Sci, North Africa Res Grp NARG, Williamson Bldg,Oxford Rd, Manchester M13 9PL, Lancs, England.
来源期刊	JOURNAL OF AFRICAN EARTH SCIENCES
ISSN	1464-343X
EISSN	1879-1956
出版年	2021
卷号	178
英文摘要	This study presents an integrated mineralogical assessment for the provenance of sediments derived from modern-day rivers and Cenozoic deposits in Senegal and Gambia. Two distinct populations are identified from discrimination of the heavy mineral assemblages; the Senegal River sediment, sourced from the West African Craton and Mauritanides and Meso-Cenozoic sediment sourced from the onshore Senegal Basin, demonstrating prevalent recycling of Senegal Basin sediments by the Ferlo, Saloum, Gambia and Casamance Rivers throughout the Quaternary. The Senegal River records the occurrence of amphibole, epidote, garnet and pyroxene, which indicates denudation of Neo to Paleo-Proterozoic granites, low-medium grade meta-sediments and a skarn-type lithology. Meso-Cenozoic recycled sediments within the onshore Senegal Basin exhibit a heavy mineral component which has been modified through the chemical-weathering and diagenesis of less-stable amphibole, pyroxene and garnet. U/Pb dating of zircons from the Casamance and Gambia provinces indicates that, at least in part, the Mesozoic sediments of the onshore Senegal basin may have been ultimately derived from the Leo-Man Shield. Kaolin occurrence is associated with tropical weathering of laterites. The occurrence of terrigenous-smectite sourced from high altitude regions of the Mauritanides and West African Craton is interpreted to have formed under hyper-arid conditions prior to erosion and transportation, during the African humid periods of the Holocene. This integrated mineralogical study of modern-day and Cenozoic sediments has established prevalent recycling of Senegal Basin-sediments by the Ferlo, Saloum, Gambia and Casamance Rivers and continued erosion and recycling of hinterland-sediments via the modern-day Senegal River. This identification of two distinct provenance groups and the strong climatic signal provides the important framework for future studies assessing the source to sink systems during the Meso-Cenozoic.
英文关键词	Provenance Heavy mineral Senegal Africa West African Craton River Quaternary Sediment recycling
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000640959600003
WOS关键词	HEAVY MINERAL ASSEMBLAGES ; CENTRAL ATLANTIC ; WEST-AFRICA ; OROGENIC BELT ; BASIN ; EVOLUTION ; SANDSTONES ; NORTHERN ; RIVER ; PETROGRAPHY
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368749
作者单位	[Mounteney, Ian; Casson, Max; Redfern, Jonathan] Univ Manchester, Dept Earth & Environm Sci, North Africa Res Grp NARG, Williamson Bldg,Oxford Rd, Manchester M13 9PL, Lancs, England; [Mounteney, Ian; Rushton, Jeremy] British Geol Survey, Kingsley Dunham Ctr, Nottingham NG12 5GG, England; [Millar, Ian] Kingsley Dunham Ctr, Natl Isotope Geosci Lab, Nottingham NG12 5GG, England; [Dethie, Ndiaye] Cheikh Anta DIOP Univ Dakar, Univ Cheikh Anta Diop de Dakar UCAD, Dakar, Senegal
推荐引用方式 GB/T 7714	Mounteney, Ian,Casson, Max,Rushton, Jeremy,et al. Cenozoic to modern-day source to sink systems of Senegal: A record of provenance, transport, recycling and climate controls[J],2021,178.
APA	Mounteney, Ian,Casson, Max,Rushton, Jeremy,Millar, Ian,Dethie, Ndiaye,&Redfern, Jonathan.(2021).Cenozoic to modern-day source to sink systems of Senegal: A record of provenance, transport, recycling and climate controls.JOURNAL OF AFRICAN EARTH SCIENCES,178.
MLA	Mounteney, Ian,et al."Cenozoic to modern-day source to sink systems of Senegal: A record of provenance, transport, recycling and climate controls".JOURNAL OF AFRICAN EARTH SCIENCES 178(2021).