Shrimp U–Pb zircon age evidence for Paleoproterozoic sedimentation and 2.05Ga syntectonic plutonism in the Nyong Group, South-Western Cameroon: consequences for the Eburnean–Transamazonian belt of NE Brazil and Central Africa

Lerouge, Cathérine; Cocherie, Alain; Toteu, S.F.; Pénaye, Joseph; Milési, Jean-Pierre; Tchameni, Rigobert; Nsifa, Emmanuel N.; Fanning, C. Mark; Deloule, Étienne

doi:10.1016/j.jafrearsci.2005.11.010

Cited by 208 publications

(180 citation statements)

References 28 publications

(62 reference statements)

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“…Both units are distinguished on the basis of different petrological, structural and geochronological features [11]- [14]. showing the location of the Binga and Djadom iron ore prospects.…”

Section: Geographic and Geologic Context Of The Djadom And Binga Ironmentioning

confidence: 99%

Petrochemistry of Two Magnetite Bearing Systems in the Precambrian Belt of Southern Cameroon

Ngoran¹,

Suh²,

Bowker³

et al. 2016

IJG

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In the past decades, several iron ore occurrences have been discovered in the Precambrian Belt of southern Cameroon, with focus on their economic potential, and little attention on the deposit type. However, few studies have been geared towards understanding the different deposit types within this region. This paper seeks to provide new insight on the different styles of iron ore mineralisation of two potential, yet least studied iron ore deposits in this region in addition to enhancing exploration efforts within the different prospects. Petrology and geochemistry of rock samples from the Binga and Djadom iron prospects in southern Cameroon are investigated. The structural disposition of the prospects was mapped and cores described, sampled and subsequently analysed to enhance the understanding of the alteration mineralogy, ore mineralogy and textural features of the iron-bearing lithologies. Polished thin sections were studied by standard microscopy while the bulk rock geochemistry was determined by X-ray fluorescence (XRF) for major and trace elements. At Binga, the main rock types are magnetite gneisses, amphibolites, quartz-biotite gneisses, and mafic intrusions, while the main rocks encountered at Djadom are magnetite gneisses, amphibolitic BIFs, quartz-biotite gneisses, amphibolites and fault rocks. At both prospects, the target lithology for iron ore is the magnetite gneiss. The magnetite gneisses at the Binga prospect are weakly to moderately foliated, but strongly foliated at Djadom, and both contain fractures that are healed by irregular magnetite.

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“…Both units are distinguished on the basis of different petrological, structural and geochronological features [11]- [14]. showing the location of the Binga and Djadom iron ore prospects.…”

Section: Geographic and Geologic Context Of The Djadom And Binga Ironmentioning

confidence: 99%

Petrochemistry of Two Magnetite Bearing Systems in the Precambrian Belt of Southern Cameroon

Ngoran¹,

Suh²,

Bowker³

et al. 2016

IJG

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“…Several detrital zircon studies (e.g., Waldron et al 2009; within the Meguma terrane, West Avalonia, and Ganderia have attempted to distinguish West African craton from Amazonian craton sources. The West African craton is characterized by Paleoproterozoic rocks (2.0 to 2.2 Ga) related to the Eburnean and Birimian orogens, and Archean rocks (Rocci et al 1991;Lerouge et al 2006). The Amazonian craton has Paleoproterozoic and Archean sources as well, but also has extensive Mesoproterozoioc crust including the Rio Negro belt (1.6 to 1.8 Ga) and the Rondonia-Sunsas belts (1.3 to 1.0 Ga) (Litherland et al 1985;Rowley and Pindell 1989).…”

Section: Relationship To the Welsh Basinmentioning

confidence: 99%

Stratigraphy, provenance and tectonic setting of the Lumsden Dam and Bluestone Quarry formations (Lower Ordovician), Halifax Group, Nova Scotia, Canada

Pothier¹,

Waldron

White

et al. 2015

atgeol

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Cambrian to Ordovician metamorphosed clastic sedimentary rocks of the Meguma terrane have no correlatives elsewhere in Atlantic Canada but are similar to successions in North Wales. In the Meguma terrane, the Cambrian Goldenville Group, dominated by sandstone, is overlain by the Halifax Group, consisting mainly of fine-grained slate and siltstone. Within the Halifax Group widespread Furongian black slate units are overlain by greyer units with rare Early Ordovician fossils, assigned to the laterally equivalent Bear River, Feltzen, Bluestone Quarry, Lumsden Dam and Glen Brook formations. The type section of the Bluestone Quarry Formation, here defined, is on Halifax Peninsula, where four constituent members are recognized; the type section of the Lumsden Dam Formation is here defined in the Lumsden Dam region near Wolfville. Detrital zircons extracted from a sample of the Lumsden Dam Formation show a range of ages similar to those displayed by the underlying Goldenville Group, including abundant Neoproterozoic zircon representing Avalonian or Pan-African sources, and a prominent group of peaks between 1.95 and 2.2 Ga, probably representing sources in West Africa. A sample from the Glen Brook Formation east of Halifax shows a similar distribution. In contrast to the correlative Welsh successions, no influx of Mesoproterozoic zircon is seen in Early Ordovician samples, suggesting that, if the two basins were in close proximity in the Cambrian, they had diverged by the Early Ordovician, possibly as a result of strike-slip motion along the margin of Gondwana.

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“…The geology of Cameroon is predominantly made up of Precambrian basement rocks, CretaceousTertiary sedimentary basins, the Tertiary Cameroon Volcanic Line and Quaternary alluviums. The Precambrian mainly comprises the Archean Ntem Complex, the Paleoproterozoic Nyong Series, the Yaounde Group and the Pan-African granitoids [21,22]. The main sedimentary basins in Cameroon are the Mamfe, the Rio del Rey and the Douala/Kribi-Campo Basins.…”

Section: Geology Of Kaolin Sites From Cameroonmentioning

confidence: 99%

Geochemistry of Selected Kaolins from Cameroon and Nigeria

et al. 2017

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Abstract:The geochemical characteristics of selected kaolins from Cameroon and Nigeria are presented, with an attempt to elucidate on their possible industrial applications by comparing them to world-known kaolin deposits. Major oxides concentrations were subjected to factor analyses in interpreting their relationships. Geochemical indices, including chemical index of alteration (CIA), chemical index of weathering (CIW) and the index of compositional variability (ICV) were computed and plotted on binary and ternary diagrams to determine the intensity of weathering of the kaolins and discriminate their different source rock types. Kaolinite was the major phase, followed by quartz, illite and goethite as minor phases. Minerals in trace phases included smectite, anatase, muscovite, gibbsite, microcline, palygorskite and calcite. Mean abundances of major oxides in wt% were: SiO 2 (56.96)>Al 2 O 3 (24.09)>Fe 2 O 3 (3.78)>TiO 2 (1.53)> K 2 O (1.26)> MgO (0.27)>CaO (0.20)>Na 2 O (0.17)>P 2 O 5 (0.05)>MnO (0.04). The CIW versus CIA and ICV versus CIA plots showed that most of the kaolins clearly depicted extreme silicate weathering. The current applications of kaolins from Cameroon and Nigeria include ceramics and manufacturing of bricks and tiles. Low MgO, CaO, Na 2 O, K 2 O and TiO 2 further position the kaolins for pharmaceutics, cosmetics, rubber and plastic applications. Thus, the studied kaolins have the potential to contribute to improved economic development of these countries.

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Shrimp U–Pb zircon age evidence for Paleoproterozoic sedimentation and 2.05Ga syntectonic plutonism in the Nyong Group, South-Western Cameroon: consequences for the Eburnean–Transamazonian belt of NE Brazil and Central Africa

Cited by 208 publications

References 28 publications

Petrochemistry of Two Magnetite Bearing Systems in the Precambrian Belt of Southern Cameroon

Petrochemistry of Two Magnetite Bearing Systems in the Precambrian Belt of Southern Cameroon

Stratigraphy, provenance and tectonic setting of the Lumsden Dam and Bluestone Quarry formations (Lower Ordovician), Halifax Group, Nova Scotia, Canada

Geochemistry of Selected Kaolins from Cameroon and Nigeria

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