Cenozoic Chemostratigraphy

Chemostratigraphy of the Cretaceous Yolde Formation in Yola Sub-Basin, Northern Benue Trough, Ne Nigeria

“…The terrigenous content of the fluvial depositional facies of the Yolde Formation is linked to base-level fluctuations as it also reflects positive accommodation space, whereas, the underlying transitional marine facies reflect negative accommodation space ( (Farouk et al, 2018;Roy et al, 2018;Sial et al, 2019;Milad et al, 2020;Paronish et al, 2020;Michael & Craigie, 2021;Tonner, 2022). Reflecting on these depositional processes, the Al2O3, Al2O3/Fe2O3, KO2/Al2O3, TiO2/Al2O3, CaO, Cr, Rb/Sc, and Zr stacking patterns in cycles 1 through 4 started with high accommodation and reduce to a minimum at the top of a cycle, and there is a rapid increase in accommodation spaces.…”

“…The ubiquitous presence of siliciclastic material in the platform-top setting was due to the constant proximity of the shoreline, which in turn was due to the narrowness of the carbonate platform in this area. This proximity and constant supply of terrestrial detritus may be the reasons that terrestrial content fluctuations do not follow a classic carbonate siliciclastic model with reciprocal sedimentation (Farouk et al, 2018;Roy et al, 2018;Sial et al, 2019;Milad et al, 2020;Paronish et al, 2020;Michael & Craigie, 2021;Tonner, 2022). Conclusion This research revealed that the upper part of the Yolde Formation, primarily composed of sandstone, and the lower part, consisting of thick shale and shale/siltstone intercalation, exhibit significant variability in geochemical characteristics.…”

“…It is composed of sandstone characterized by moderate content of K2O/Al2O which is an indicator of increase in K-feldspar/illite and a greater proportion of TiO2/Al2O3 pointing towards higher concentration of Titanium bearing heavy minerals in the Yolde Formation ( Fig. 4) and this is due to fact that there's abundant amount of Al2O3 in nalyzed samples (Farouk et al, 2018;Roy et al, 2018;Sial et al, 2019;Milad et al, 2020;Paronish et al, 2020;Michael & Craigie, 2021;Tonner, 2022).…”