Granulometry, heavy mineral and geochemical studies of stream sediments around Bula, Dass District, Northeast Nigeria
| Autor: | E. E. Okon, C. I. Adamu, D.O. Inyang |
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| Rok vydání: | 2020 |
| Předmět: |
Provenance
Mineralization (geology) Tourmaline Heavy mineral Geochemistry Sediment engineering.material 010502 geochemistry & geophysics 01 natural sciences 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Granulometry engineering Geology Ilmenite 0105 earth and related environmental sciences Zircon |
| Zdroj: | Global Journal of Geological Sciences. 18:63-73 |
| ISSN: | 1596-6798 |
| DOI: | 10.4314/gjgs.v18i1.6 |
| Popis: | Active stream sediments generally consist of broken-down fragments of pre-existing rocks by the action of river (stream) flow. This makes them target materials for routine geochemical surveys and provenance analysis. Fifteen (15) stream sediment samples were collected in some parts of Bula and its environs, northeastern Nigeria, in order to determine their textural characteristics, heavy mineral and elemental composition. The sediments were subjected to granulometric, heavy mineral and elemental analyses. The result of granulometric analysis show that the streamsediments are poorly to moderately well sorted, very platykurtic to leptokurtic, fine to medium grained and positively skewed. Zircon, rutile and tourmaline are the dominant heavy mineral species occurring in the sediments. The computed Zircon-Tourmaline-Rutile (ZTR) index values for the samples range from 59.18 - 83.53, indicating mineralogical maturity. The geochemical data of the stream sediment samples show that the mean contents of the trace elements [Ti (0.73 ± 0.74%), Fe (0.39±0.19%), Cr (816±639ppm), Ni (258±108ppm), Pb (48±12.37ppm) and Zn (502±126ppm)] were higher than their respective average crustal values except for Fe. Computed threshold values indicate possible mineralization containing Fe and Ti. The elements have variable spatial distribution. The study shows that the trace elements composition of the stream sediments is majorly lithogenic. Because mineralization in rocks and sediments are often characterized by considerable variation in their trace elements contents, the metal concentrations in these sediments are large enough for Ilmenite and Rutile mineralization to be suspected within the study area. |
| Databáze: | OpenAIRE |
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