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- W2187923996 abstract "ORIGINAL SCIENTIFIC PAPER An integratedanalyticalapproachcomprisingpetrographic,geochemical,andsedimentologicalstudieswas carried out in thirteen outcrop and four subsurface samplesof the Pakaeogene Ogwashi-AsabaFormation in the Anambra Basin. The goal was inferring about source rock, transport history, tectonic setting, depositional environment and hydrocarbon potentials. Sandstones are coarse to medium grained, moderatelyto poorlysorted,fine to nearlysymmetricallyskewed. Bivariateplotsof skewnessagainstsorting and sorting against mean size indicate a fluvial depositional environment. Most of the sandstone exhibit bimodality, which indicated more than one source. Those are lithic arenites comprising 64% rock fragment, 31% quartz, 5% feldspar which suggest that they are mineralogically immature sands. The ternary plot of the framework elements revealedthat they are derived from an orogen which is taken to be a molassetrough formed between basin and craton. Geochemical analysis showed the prevalence of SiO2 (5.84-84.57%) and total Fe (12.69-92.07%) over all other oxides. This points to an oxidizing, sub aerial environment, which favours the formation of hematite. SiO2/A2O3 ratio indicates chemical immatureness. Organic analysis in lignite gave TOC 1.60-3.13%. Vitrinite dominated maceral suggested has the source potential for gas. Scatter plots(tissuepreservationvs.gelification index) indicatedon swampsasdepositionalenvironmentof lignite." @default.
- W2187923996 created "2016-06-24" @default.
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- W2187923996 date "2012-01-01" @default.
- W2187923996 modified "2023-09-26" @default.
- W2187923996 title "Petrographic and stratigraphic analyses of Palaeogene Ogwashi-Asaba formation, Anambra Basin, Nigeria" @default.
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