Abstract
Petrographic and provenance studies of heavy minerals in Ifelodun sediment were carried out. Sediment samples from eight locations were obtained from the study area; sieved to allow only sand-size lithology. The result was achieved after subjecting this sieved lithology obtained to analyses using a binocular (transmitted and reflected light) microscope. Minerals were separated in a funnel using bromoform with a specific gravity of about 2.89 (gravity method). The heavy minerals present in lithologic sand units are mainly staurolite, tourmaline, zircon and other opaque minerals including cassiterite. The most dominant non-opaque mineral is staurolite with 27.5% of the total minerals counted in the area. Staurolite is very appreciable in locations AR1 with 60% presence (which is 80% of the non-opaque minerals), AR3, AR5, AR7 and OL15b (each with 30%). OL15b also recorded a better amount of tourmaline (20%); Zircon is better in OL6b with 20% of the heavy minerals available in this location. The source rock predicted is porphyroblastic schists.
Highlights
Mineral study provides provenance information for paleotectonic reconstruction if tied with petrographic remarks under the microscope (Dewey, 2005; Garzanti, 2019) and is extensively conducted by researchers due to their economic importance
With heavy mineral and petrographic information, we can measure the extent of sedimentary recycling
The outcomes of petrographic studies which show photomicrographs of heavy minerals from different samples are presented in Figures 2 to 9
Summary
Mineral study provides provenance information for paleotectonic reconstruction if tied with petrographic remarks under the microscope (Dewey, 2005; Garzanti, 2019) and is extensively conducted by researchers due to their economic importance. Heavy mineral study is predominantly useful as product of sediment sources and sediment transport path. With heavy mineral and petrographic information, we can measure the extent of sedimentary recycling (that is, mineralogical and chemical compositions of sediments may reveal the special effects of the present-day weathering system and previous weathering and diagenetic variation history). The heavy mineral accumulation in deposits reveals their parent rocks and their origin (Raiswell and Anderson, 2005; Oladipo et al, 2018). Factors that impact this accumulation are weathering, mechanical abrasion, physical categorization and diagenetic consideration in burial (Morton and Hallsworth, 1999; Oladipo et al, 2018)
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