A comparative review of petrogenetic processes beneath the Cameroon Volcanic Line: Geochemical constraints

Asaah, Asobo Nkengmatia Elvis; Yokoyama, T.; Aka, Festus Tongwa; Usui, Tomohiro; Wirmvem, Mengnjo Jude; Tchamabé, Boris Chako; Ohba, Takayoshi; Tanyileke, Gregory; Hell, J.V.

doi:10.1016/j.gsf.2014.04.012

Cited by 48 publications

(44 citation statements)

References 68 publications

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“…The project went well in terms of scientific achievement. Many scientific papers were published, e.g., Issa et al (2013Issa et al ( , 2014aIssa et al ( , 2014b, Asaah et al (2014Asaah et al ( , 2015, Chako , Fouépé et al (2013), Fantong et al (2013Fantong et al ( , 2015, Tiodjio et al (2014Tiodjio et al ( , 2015Tiodjio et al ( , 2016, Kamtchueng et al (2014Kamtchueng et al ( , 2015aKamtchueng et al ( , 2015b, , Ohba et al (2016), Kozono et al (2016), and Saiki et al (2016).…”

Section: Satreps-nymo: a Project To Reduce The Risk Of Another Limnicmentioning

confidence: 99%

“…Cameroon, and are made of mostly nephelinitic lavas for Etindé (Nkoumbou et al, 1995) and basalts and basanites for Bioko and Mt. Cameroon (Yokoyama et al, 2007;Asaah et al, 2014). Mt.…”

Section: -2 Origin Of the Cameroon Volcanic Linementioning

confidence: 99%

“…The origin of the CVL has long been a subject of controversy, and various hypotheses have been proposed. They are summarized by Aka et al (2004) and more recently by Asaah et al (2014), as follows: (1) Reactivation of preexisting tectonic structures in the Cenozoic associated with crustal melting (Gorini and Bryan, 1976;Moreau et al, 1987;Fairhead, 1988). (2) Membrane stresses generated by the movement of the African plate away from the equator (Freeth, 1978).…”

Section: -2 Origin Of the Cameroon Volcanic Linementioning

confidence: 99%

“…In this sense, the magmatism in the CVL may have been similar to that in the currently active East African Rift Zone. Asaah et al (2014) went for the "hotline" model which invokes multiple plumes originating from the same source in the upper mantle, each of which produced volcanoes independently, as the model appears to explain the diverse features of the CVL, i.e., geophysical, structural and geochemical evidence, including the absence of time-dependent volcanic activity.…”

Section: -2 Origin Of the Cameroon Volcanic Linementioning

confidence: 99%

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Lakes Nyos and Monoun Gas Disasters (Cameroon)—Limnic Eruptions Caused by Excessive Accumulation of Magmatic CO2 in Crater Lakes

Kusakabe¹

2017

GEochem. Monogr. Ser.

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Section: Satreps-nymo: a Project To Reduce The Risk Of Another Limnicmentioning

confidence: 99%

“…Cameroon, and are made of mostly nephelinitic lavas for Etindé (Nkoumbou et al, 1995) and basalts and basanites for Bioko and Mt. Cameroon (Yokoyama et al, 2007;Asaah et al, 2014). Mt.…”

Section: -2 Origin Of the Cameroon Volcanic Linementioning

confidence: 99%

Section: -2 Origin Of the Cameroon Volcanic Linementioning

confidence: 99%

Section: -2 Origin Of the Cameroon Volcanic Linementioning

confidence: 99%

See 2 more Smart Citations

Lakes Nyos and Monoun Gas Disasters (Cameroon)—Limnic Eruptions Caused by Excessive Accumulation of Magmatic CO2 in Crater Lakes

Kusakabe¹

2017

GEochem. Monogr. Ser.

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“…It is affected by and/or vulnerable to hydro-meteorological hazards (floods, landslides, droughts, sea level rise), geological hazards (volcanic eruptions, earthquakes, gas explosions from lakes), ecological hazards (locust swarms), technological or man-made hazards (urban fires, conflicts, industrial and transport accidents), and biological hazards (epidemics) (e.g., [1]). Most of the geological hazards in the country are linked to the existence of a geological feature called the Cameroon Volcanic Line (CVL, [2] [5]. Devastating landslides have occurred in Melon, Yaoundé, Santa, Bafaka, Dschang, Belo, Limbe, Buea, Kemkem, Wabane and Bamanda [1] [6] [7].…”

Section: Introductionmentioning

confidence: 99%

The Debris Flow of 1st August 2012 in Kakpenyi-Tinta (Akwaya Sub Division) Southwest Cameroon—I: Event Description, Causes and Impacts

Ntchantcho¹,

Anye²,

Aka³

et al. 2017

OJG

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Compared to large-scale infrequent disasters like volcanic eruptions, earthquakes, and gas explosions from volcanic (maar) lakes, most small-scale everyday disasters (e.g., landslides and floods) are not well reported and documented in Cameroon, despite the fact that cumulatively, they cause the most casualties and distress to the people affected. This paper documents a debris flow that occurred on the 1 st of August 2012 in Kakpenyi, a quarter found in Tinta, one of the villages of Akwaya Sub Division in Manyu Division of the Southwest Region of Cameroon. The event started from the western slope (06˚14.350'N & 09˚31.475'E) of a hogback in the settlement, and mobilized ca 3.47 × 10 6 m 3 of material over a ca 1 km distance. The material was made up of a chaotic mix of mud, rock fragments, boulders, twigs, tree logs, trunks, and roots. Its distal part dammed river Kakpenyi forming a 10 m deep lake which eventually safely emptied itself. No casualties were recorded but 20 people got injured and 21 people lost farmland. The debris flow was not caused by earthquake shaking. Instead, inappropriate land use acted as a remote cause to predispose the steep slope, while heavy rainfall triggered the flow. Verbal reports talk of a similar event 40 years ago in the area. This shows that Kakpenyi is vulnerable to this kind of hazard, requiring that major infraHow to cite this paper:

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Late Cretaceous intraplate silicic volcanic rocks from the Lake Chad region: An extension of the Cameroon volcanic line?

Shellnutt

Lee

Torng³

et al. 2016

Geochem Geophys Geosyst

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Silicic volcanic rocks at Hadjer el Khamis, near Lake Chad, are considered to be an extension of the Cameroon volcanic line (CVL) but their petrogenetic association is uncertain. The silicic rocks are divided into peraluminous and peralkaline groups with both rock types chemically similar to within‐plate granitoids. In situ U/Pb zircon dating yielded a mean 206Pb/238U age of 74.4 ± 1.3 Ma indicating the magmas erupted ∼10 million years before the next oldest CVL rocks (i.e., ∼66 Ma). The Sr isotopes (i.e., ISr = 0.7021–0.7037) show a relatively wide range but the Nd isotopes (i.e., 143Nd/144Ndi = 0.51268–0.51271) are uniform and indicate that the rocks were derived from a moderately depleted mantle source. Thermodynamic modeling shows that the silicic rocks likely formed by fractional crystallization of a mafic parental magma but that the peraluminous rocks were affected by low temperature alteration processes. The silicic rocks are more isotopically similar to Late Cretaceous basalts identified within the Late Cretaceous basins (i.e., 143Nd/144Ndi = 0.51245–0.51285) of Chad than the uncontaminated CVL rocks (i.e., 143Nd/144Ndi = 0.51270–0.51300). The age and isotopic compositions suggest the silicic volcanic rocks of the Lake Chad region are related to Late Cretaceous extensional volcanism in the Termit basin. It is unlikely that the silicic volcanic rocks are petrogenetically related to the CVL but it is possible that magmatism was structurally controlled by suture zones that formed during the opening of the Central Atlantic Ocean and/or the Pan‐African Orogeny.

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A comparative review of petrogenetic processes beneath the Cameroon Volcanic Line: Geochemical constraints

Cited by 48 publications

References 68 publications

Lakes Nyos and Monoun Gas Disasters (Cameroon)—Limnic Eruptions Caused by Excessive Accumulation of Magmatic CO<sub>2</sub> in Crater Lakes

Lakes Nyos and Monoun Gas Disasters (Cameroon)—Limnic Eruptions Caused by Excessive Accumulation of Magmatic CO<sub>2</sub> in Crater Lakes

The Debris Flow of 1<sup>st</sup> August 2012 in Kakpenyi-Tinta (Akwaya Sub Division) Southwest Cameroon—I: Event Description, Causes and Impacts

Late Cretaceous intraplate silicic volcanic rocks from the Lake Chad region: An extension of the Cameroon volcanic line?

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A comparative review of petrogenetic processes beneath the Cameroon Volcanic Line: Geochemical constraints

Cited by 48 publications

References 68 publications

Lakes Nyos and Monoun Gas Disasters (Cameroon)—Limnic Eruptions Caused by Excessive Accumulation of Magmatic CO<sub>2</sub> in Crater Lakes

Lakes Nyos and Monoun Gas Disasters (Cameroon)—Limnic Eruptions Caused by Excessive Accumulation of Magmatic CO<sub>2</sub> in Crater Lakes

The Debris Flow of 1&lt;sup&gt;st&lt;/sup&gt; August 2012 in Kakpenyi-Tinta (Akwaya Sub Division) Southwest Cameroon—I: Event Description, Causes and Impacts

Late Cretaceous intraplate silicic volcanic rocks from the Lake Chad region: An extension of the Cameroon volcanic line?

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The Debris Flow of 1<sup>st</sup> August 2012 in Kakpenyi-Tinta (Akwaya Sub Division) Southwest Cameroon—I: Event Description, Causes and Impacts