Petrology and geochemical characteristics of Precambrian granitic basement complex rocks in the southernmost part of North-Central Nigeria

Obiora, Smart C.; Ukaegbu, V. U.

doi:10.1007/s11631-009-0377-2

Cited by 14 publications

(9 citation statements)

References 11 publications

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“…B a s e d o n the mineralogical and geochemical characteristics of the Wowyen pegmatites, they are classified as Li-Cs-Ta rare metal mineralized pegmatites of [7,8,43] . The complex pegmatites show higher concentrations of Rb, Cs, Sn, B, Nb, Ta, Li and less concentration in Ba and Ti whereas the simple pegmatites show relative reduction in Nb, Ta and enhancement in REEs.…”

Section: Discussionmentioning

confidence: 99%

“…[26] accounted that the subduction and subsequent collision at margin of the West African craton resulted to widespread downbucking which resulted to emplaced of calc-alkaline acid and basic rocks. Redrawn after [8] .…”

Section: Regional Geologymentioning

confidence: 99%

“…The pegmatites in Wowyen areas of Akwanga, northcentral basement constitute integral components of the granitic and basaltic intrusions of late to post-tectonic Pan-African rocks which is about 600 ± 150 Ma [6][7][8] . The pegmatites are accounted in linear belt spreading around Ago -Iwoye area in the southwest Nigeria along Jos, northcentral basement Nigeria (see Figure 1) [9][10][11][12][13][14][15] .…”

Section: Introductionmentioning

confidence: 99%

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Geochemical Characterization of Mineralized Pegmatites around Wowyen Areas, Akwanga, Northcentral Nigeria

Chukwu¹

2022

adv. in geol. and geotech. eng. res.

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This study aims to account for the petrogenesis and mineralization of pegmatites around the Wowyen area, northcentral basement complex,Nigeria. Field studies, petrography and whole rock geochemistry (Major oxides were estimated by X-Ray Fluorescence while the trace elements were estimated by Inductively Coupled Plasma Mass Spectrometry) where the methods adopted. The pegmatites around Wowyen area are emplaced in the remobilized belt of the Nigerian Basement complex. They are predominantly complex pegmatites (rare-metal pegmatites) which are intruded in the biotite-muscovite gneiss while the simple pegmatites intruded more in the migmatitic banded gneiss. The major components of the complex pegmatites are quartz, albite and muscovite and tourmaline.The accessory constituents are garnet; ilmenites; cassiterite-columbitetantalite oxides in contrast to quartz, microcline and biotite of the simple pegmatites. The complex pegmatites show higher peraluminous than the simple pegmatites, however, higher fractionation is observed in the complex pegmatites than the simple pegmatites. The complex pegmatites are rather enriched in rare elements such as Li, Rb, B, Cs, Sn, Nb, Be and Ta and show low ratios in Al/Ga and K/Rb than the simple pegmatites. The pegmatites are likely product of sedimentary origin and originated from post-collisional tectonic event.

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Section: Discussionmentioning

confidence: 99%

Section: Regional Geologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Geochemical Characterization of Mineralized Pegmatites around Wowyen Areas, Akwanga, Northcentral Nigeria

Chukwu¹

2022

adv. in geol. and geotech. eng. res.

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“…The Basement Complex rocks are subdivided into migmatite-gneiss complexes, the older metasediments, the younger metasediments, the older granites and, the younger granite complexes and volcanic rocks (Grant, 1970;Rahaman, 1976;Obaje, 2009, Obiora andUkaegbu, 2009). The Migmatite-Gneiss Complex is the commonest and the oldest basement rock and comprises of gneisses (biotite gneiss and banded gneiss), amphibolites, migmatite and metavolcanics.…”

Section: Geologic Settingmentioning

confidence: 99%

Enhancing Stream Sediment Geochemical Anomalies Using Spatial Imaging: Case Study from Dagbala and Its Environs

Adiotomre¹

2014

IOSRJAGG

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The exploration for solid minerals is a very demanding and costly operation and exploration techniques are continually modified, with the better data interpretation approach continuously sought after by operators of the solid mineral industry, so as to improve the success rate of mineral deposit discovery. Spatial imaging approach to interpretation of anomalies related to stream sediment geochemical data is increasingly being recognized, as a significant component of the geochemical survey data analysis in the prospect for concealed mineral deposits. It is apparent that the spatial rendering of such data enhances the interpretation of associated anomalies. The present study, therefore, adopts this technique to investigate the regional distribution of five chemical elements (Au, Zn, Pb, Cu, and Ag) in stream sediments derived predominantly from Precambrian Basement rocks in the Dagbala area. Stream sediment samples were analyzed for these elements in bulk fractions with an Atomic Absorption Spectrophotometer after hot extraction with aqua regia. In order to improve the spatial mapping of geochemical anomalies, the computed statistical threshold for the chemical data is used to augment geochemical models developed with Surfera contouring and 3-D surface mapping package. Stream sediment concentration data are extrapolated or interpolated at the sample points on stream beds, allowing geochemical anomalies to be aptly extracted for optimal spatial assessment. Geochemical models show anomalies of Ag, Cu, Au, and Zn, while grid vector maps depict the dispersion trend of the elements studied.

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“…Few studies on trace elements and REE exist, and the most recent work in this area is by Obiora (2012), who provided the background to the present study. Other works are by Obiora and Ukaegbu (2009), Rahman et al (1988), Ukaegbu and Ekwueme (2006). This study seeks to elucidate the role of the Precambrian metamorphic basement complex in the evolution of the granitic rocks forming the Bamenda massif (southeastern basement complex of Nigeria) using the trace element and REE characteristics.…”

Section: Introductionmentioning

confidence: 99%

Geochemical characteristics of Precambrian Basement rocks from southeastern Nigeria: an approach to their petrogenesis and tectonic setting.

Ibe

2020

GeA

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Trace and Rare-Earth element geochemical study of twenty samples of migmatitic banded gneisses, garnet biotite schists, dolerites, granites and rhyolites was carried out in a bid to determine their petrogenetic and tectonic significance in the evolution of the southeastern Basement complex of Nigeria. The data shows that partial melting (crustal anatexis) of migmatitic gneisses and schists played a significant role in the evolution of the granitic intrusions. This is supported by the high incompatible (Rb/Sr = 0.16 to 1.31 and Ba/Sr = 0.75 to 6.21) elements ratio in the granitic intrusions than that of the migmatitic gneisses and schists (Rb/Sr, 0.051 to 0.824; Ba/Sr, 0.7 to 5). High ratios of Ba/Sr and Rb/Sr and lesser values of Ba/Rb ratios in some granitic intrusions than in others suggests increasing fractionation during the anatexis. The role of partial melting is also evident in the smooth REE patterns shown by most of these rocks and the negative Eu anomaly as indicated by the values of Eu/Eu* (0.097 to 0.7). LREE enrichment is evident in the high values of Ce/YbN (12.08-174.5), La/YbN (15.2-228.4) and La/SmN (2.6-7.2) in the granitic intrusions. Tectonic discrimination diagrams of the rocks indicate that the basement rocks were most probably formed in a post-collision orogenic setting while the dolerite and the rhyolite were formed in within-plate anorogenic setting.

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Petrology and geochemical characteristics of Precambrian granitic basement complex rocks in the southernmost part of North-Central Nigeria

Cited by 14 publications

References 11 publications

Geochemical Characterization of Mineralized Pegmatites around Wowyen Areas, Akwanga, Northcentral Nigeria

Geochemical Characterization of Mineralized Pegmatites around Wowyen Areas, Akwanga, Northcentral Nigeria

Enhancing Stream Sediment Geochemical Anomalies Using Spatial Imaging: Case Study from Dagbala and Its Environs

Geochemical characteristics of Precambrian Basement rocks from southeastern Nigeria: an approach to their petrogenesis and tectonic setting.

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