Stream sediment geochemistry of Guberunde Horst, “Gongola basin”, Upper Benue Trough, Nigeria
Identifieur interne : 001557 ( Main/Exploration ); précédent : 001556; suivant : 001558Stream sediment geochemistry of Guberunde Horst, “Gongola basin”, Upper Benue Trough, Nigeria
Auteurs : O. M. Ojo [Nigeria]Source :
- Journal of African Earth Sciences [ 0899-5362 ] ; 1988.
Abstract
The crystalline basement complex of Guberunde Horst is mainly composed of granitic rocks, into which acid volcanics of the Burashika group of rocks were intruded during the Jurassic. The Horst itself was produced in the Lower Albian by uplift of the basement between two series of NE-SW striking border faults. Most of the fractures which pre-dated the uplift are filled with rhyolite and aplite of the Burashika group.A total of 374 stream sediment samples were collected over an area of 700 km2. Each sample was analysed for Cu, Pb, Zn, Co, Ni, Fe, Mg, Mn and Ca; in addition, the pH was determined in each. Condescriptive and various multivariate statistical methods were employed in the interpretation of the resultant geochemical data.The various association of elements exhibits a four-factor model as follows:
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DOI: 10.1016/0899-5362(88)90055-3
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