Geochemical characterisation of clastic sediments in Kompina (N'kapa Formation, NW Douala Basin, West Cameroon): Implication for provenance, paleoweathering and sediment maturity
Chemical analyses were carried out on clastic sedimentary rocks in Kompina (N'kapa Formation of the NW, Douala Basin, West Africa) to disclosed the composition of their source rock, characterised their tectonic domains, decipher the intensity of the past weathering, sedimentary cycles and matur...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-05-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844023032413 |
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| author | Florence Njinto Kwankam Bokanda Ekoko Eric Amaya Adama Bisse Salomon Bertrant Anyeku Njeck Rexon Junior Nfor Shannon Ngwakfu Mokake Fidelis Esue Matombo Hewett Ekumeli Ngwane Maureen Ntube M. Christopher Agyingi |
| author_facet | Florence Njinto Kwankam Bokanda Ekoko Eric Amaya Adama Bisse Salomon Bertrant Anyeku Njeck Rexon Junior Nfor Shannon Ngwakfu Mokake Fidelis Esue Matombo Hewett Ekumeli Ngwane Maureen Ntube M. Christopher Agyingi |
| author_sort | Florence Njinto Kwankam |
| collection | DOAJ |
| description | Chemical analyses were carried out on clastic sedimentary rocks in Kompina (N'kapa Formation of the NW, Douala Basin, West Africa) to disclosed the composition of their source rock, characterised their tectonic domains, decipher the intensity of the past weathering, sedimentary cycles and maturity using concentrations of major oxides, REES and trace elements. Provenance diagram constructed from ratios of La/Co, La/Sc, Th/Sc, Cr/Th and from binary diagrams of Zr vs TiO2 and AL2O3 vs TiO2, disclosed a felsic rock composition as the source rock of the Kompina clastic rocks. The felsic source rock composition designated for the studied clastic materials is also supported by LREE enrichment over HREE and a negative europium anomaly on chondrite calculation and diagram. New discriminant functions diagrams to delineate between active and passive domains such as DF 1&2(Arc-Rift-Col)M1, DF1&2(Arc-Rift-Col)M2 combined with diagrams of DF(A-P)M, DF(A-P)MT label a passive tectonic setting characteristics for the source rock where there studied clastic materials were sorted. The weathering intensity and plagioclase lixiviation revealed by the CIA and PIA indexes advocate a weak to intense strength of chemical weathering and lixiviation of plagioclase felspars while the CIX and PIX with elimination of CaO in their formulars show extreme intensity of weathering and lixiviation of plagioclase felspars.Most of the samples show immature nature from their ICV values > 1 but with the introduction of ICVnew in this work, where oxides of iron and calcite are considered as cement and eliminated from the formular show that all the studied samples have values < 1 indicating they are mature. Plotted diagrams of Th/Sc, and (Gd/Yb)N ratios, with relationship of Zr and (La/Yb)N shows that the studied clastic materials are mature, second cycle sediments, which have experience zircon mineral addition. |
| first_indexed | 2024-03-13T08:24:37Z |
| format | Article |
| id | doaj.art-32677a999e1244578d1d4cf029a196e5 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-03-13T08:24:37Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-32677a999e1244578d1d4cf029a196e52023-05-31T04:46:23ZengElsevierHeliyon2405-84402023-05-0195e16034Geochemical characterisation of clastic sediments in Kompina (N'kapa Formation, NW Douala Basin, West Cameroon): Implication for provenance, paleoweathering and sediment maturityFlorence Njinto Kwankam0Bokanda Ekoko Eric1Amaya Adama2Bisse Salomon Bertrant3Anyeku Njeck Rexon Junior4Nfor Shannon Ngwakfu5Mokake Fidelis Esue6Matombo Hewett Ekumeli7Ngwane Maureen Ntube8M. Christopher Agyingi9National Higher Polytechnic Institute, University of Bamenda, P.O.BOX 039, Bambili, CameroonDepartment of Geology, University of Buea, Cameroon; Corresponding author.School of Geology and Mining Engineering, Meiganga, University of Ngaoundere, CameroonSchool of Geology and Mining Engineering, Meiganga, University of Ngaoundere, CameroonDepartment of Geology, University of Buea, CameroonDepartment of Geology, University of Buea, CameroonDepartment of Geology, University of Buea, CameroonDepartment of Geology, University of Buea, CameroonDepartment of Geology, University of Buea, CameroonDepartment of Geology, University of Buea, CameroonChemical analyses were carried out on clastic sedimentary rocks in Kompina (N'kapa Formation of the NW, Douala Basin, West Africa) to disclosed the composition of their source rock, characterised their tectonic domains, decipher the intensity of the past weathering, sedimentary cycles and maturity using concentrations of major oxides, REES and trace elements. Provenance diagram constructed from ratios of La/Co, La/Sc, Th/Sc, Cr/Th and from binary diagrams of Zr vs TiO2 and AL2O3 vs TiO2, disclosed a felsic rock composition as the source rock of the Kompina clastic rocks. The felsic source rock composition designated for the studied clastic materials is also supported by LREE enrichment over HREE and a negative europium anomaly on chondrite calculation and diagram. New discriminant functions diagrams to delineate between active and passive domains such as DF 1&2(Arc-Rift-Col)M1, DF1&2(Arc-Rift-Col)M2 combined with diagrams of DF(A-P)M, DF(A-P)MT label a passive tectonic setting characteristics for the source rock where there studied clastic materials were sorted. The weathering intensity and plagioclase lixiviation revealed by the CIA and PIA indexes advocate a weak to intense strength of chemical weathering and lixiviation of plagioclase felspars while the CIX and PIX with elimination of CaO in their formulars show extreme intensity of weathering and lixiviation of plagioclase felspars.Most of the samples show immature nature from their ICV values > 1 but with the introduction of ICVnew in this work, where oxides of iron and calcite are considered as cement and eliminated from the formular show that all the studied samples have values < 1 indicating they are mature. Plotted diagrams of Th/Sc, and (Gd/Yb)N ratios, with relationship of Zr and (La/Yb)N shows that the studied clastic materials are mature, second cycle sediments, which have experience zircon mineral addition.http://www.sciencedirect.com/science/article/pii/S2405844023032413GeochemistryDouala basinSource rock compositionTectonic settingPaleoweatheringMaturity |
| spellingShingle | Florence Njinto Kwankam Bokanda Ekoko Eric Amaya Adama Bisse Salomon Bertrant Anyeku Njeck Rexon Junior Nfor Shannon Ngwakfu Mokake Fidelis Esue Matombo Hewett Ekumeli Ngwane Maureen Ntube M. Christopher Agyingi Geochemical characterisation of clastic sediments in Kompina (N'kapa Formation, NW Douala Basin, West Cameroon): Implication for provenance, paleoweathering and sediment maturity Heliyon Geochemistry Douala basin Source rock composition Tectonic setting Paleoweathering Maturity |
| title | Geochemical characterisation of clastic sediments in Kompina (N'kapa Formation, NW Douala Basin, West Cameroon): Implication for provenance, paleoweathering and sediment maturity |
| title_full | Geochemical characterisation of clastic sediments in Kompina (N'kapa Formation, NW Douala Basin, West Cameroon): Implication for provenance, paleoweathering and sediment maturity |
| title_fullStr | Geochemical characterisation of clastic sediments in Kompina (N'kapa Formation, NW Douala Basin, West Cameroon): Implication for provenance, paleoweathering and sediment maturity |
| title_full_unstemmed | Geochemical characterisation of clastic sediments in Kompina (N'kapa Formation, NW Douala Basin, West Cameroon): Implication for provenance, paleoweathering and sediment maturity |
| title_short | Geochemical characterisation of clastic sediments in Kompina (N'kapa Formation, NW Douala Basin, West Cameroon): Implication for provenance, paleoweathering and sediment maturity |
| title_sort | geochemical characterisation of clastic sediments in kompina n kapa formation nw douala basin west cameroon implication for provenance paleoweathering and sediment maturity |
| topic | Geochemistry Douala basin Source rock composition Tectonic setting Paleoweathering Maturity |
| url | http://www.sciencedirect.com/science/article/pii/S2405844023032413 |
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