Series-1 Sep-Oct-2019 Issue Statistics
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| Paper Type | : | Research Paper |
| Title | : | Structural Characterization of Outcrop-Scale in Edea and Eseka Area: Evidence for a Complex Polyphase Deformation in the Paleoproterozoic Nyong Serie (Congo craton-South Cameroon) |
| Country | : | Cameroon |
| Authors | : | Ndema Mbongué Jean Lavenir || Sigué Cyrille || Nzenti Jean Paul || Cheo Emmanuel Suh |
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: | 10.9790/0990-0705010109  |
Abstract: The Edea and Eseka area belongs to the Nyong Series which is the north-western extension of the Congo Craton in Cameroon. Structural analyses were carried out in this region in order to delineate the tectonic evolution. The structures of this area are the result of a complex structural evolution and the area experienced a polyphase deformation resulting to a succession of several phases of deformation. Detailed information on the structures and the relative timing of deformation are as follows: (1) an early stage (pre- D1) phase corresponds to the relicts of an early schistosity preserved as inclusion trails in garnet and pyroxene crystals, immediately followed by (2) two main stages (D1 and D2). D1 evolved in tangential movements, it is typically ductile and characterized by a.......
Keywords : Edea and Eseka area; Nyong series; Congo craton; tangential movements; transcurrent tectonic regime; Ogooué metamorphic; Trans-Amazonian belt.
[1]. Ndema Mbongué JL. Evolution tectono-metamorphique de la serie du Nyong à Edea et à Eseka. Thèse de doctorat Ph.D, Université de Yaoundé I. 2016.
[2]. Toteu SF, Penaye J, Van Schmus WR and Michard A. Preliminary U/Pb and Sm/Nd geochronologic data on the North-Central Cameroon: contribution of an Archaean and Paleoproterozoic crust to the edification of an active domain of the Pan-African orogeny. C. R. Acad. Sci. Paris, 1994;319:1519-1524
[3]. Lerouge C, Cocherie A, Toteu SF, Penaye J, Milesi JP, Tchameni R, Nsifa NE, Fanning CM and Deloule E. SHRIMP U/Pb zircon age evidence for paleoproterozoic sedimentation and 2.05 Ga syntectonic plutonism in the Nyong Group, South-western Cameroon: consequences for the eburnean-transamazonian belt of NE Brasil and central Africa. J. Afric. Earth Sci. 2006;44:413-427
[4]. Goodwin AM. Precambrian geology- the dynamic evolution of the continental crust, Acad Press. Harcourt Brace Jovanovich Publishers. 1991;666 pp
[5]. Maurizot P, Abessolo A, Feybesse JL, Johan V, Lecomte P. Etude et prospection miniere du Sud-Ouest Cameroun. Synthese des travaux de 1978 à 1985. Rapport BRGM 85 CMR 066. 1986.
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| Paper Type | : | Research Paper |
| Title | : | Lithostructural Mapping by Geophysical Imagery of a Granite Deposit at Gbamakro in the Department Of Bouaké (Central Côte d'Ivoire) |
| Country | : | Côte d'Ivoire |
| Authors | : | YAPO Assi Martial || SOMBO Abé Parfait || TANO Kouakou Faustin |
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: | 10.9790/0990-0705011018 |
Abstract: The research of massive rock extraction site (granite) to Gbamakro (Central Côte d'Ivoire) requires a good knowledge of the subsoil. This requires the implementation of geophysical methods of resistivity (profiling, sounding and electrical tomography). The aim is to determine the lithological and structural characteristics of the study area subsoil. The results show a resistant granite massif with fractures oriented N70 to N120. At north of the site, the fractures are associated with an altered massif. The roof of the massif is located under an altered horizon less than 5 m thick. Except north of the site, where it is at a greater depth (16 m).
Keywords : electrical profiling, electrical sounding, electrical tomography, geophysical.
[1]. D. Same, Hydrogéologie en zone de socle cristallin et cristallophyllien du Sénégal oriental. Application de la méthode électrique 1D et 2D à la localisation et à la caractérisation des aquifères de batholites de Saraya et ses environs, Thèse Doctorat 3éme cycle. Université Cheik Anta Diop, Dakar, 1999.
[2]. L. Marescot, Modélisation directe et inverse en prospection électrique sur des structures 3D complexes par la méthode des éléments finis, Thèse de doctorat ès Géosciences, Université de Nantes et de Lausanne , 2004.
[3]. M. Chouteau et B. Giroux (2006). Méthodes électriques II. Notes de cours. Géophysique appliquée, GLQ 3202. Ecole Polytechnique, France, 2006.
[4]. A. P. Sombo, Application des méthodes de résistivités électriques dans la détermination et la caractérisation des aquifères de socle en Côte d'Ivoire. Cas des départements de Sikensi et de Tiassale (Sud de la Côte d'Ivoire). Thèse de Doctorat. Université Félix Houphouët Boigny de Cocody (Abidjan, Côte d'Ivoire), 2012.
[5]. Y. Hacini, Application des méthodes géophysiques à l'étude de deux sites (Kappelen et Grenchen) de l'aquifère poreux complexe du Seeland. Thèse de doctorat, Université de Lausanne, 2006.
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| Paper Type | : | Research Paper |
| Title | : | The Local Meteoric Water Line in the Pampean Plain of Córdoba, Argentina |
| Country | : | Argentina |
| Authors | : | Cabrera, A. || M. Blarasin || F. Bécher Quinodoz || V. Lutri || J. Felizzia || C. Eric || E. Matteoda || y D. Giacobonne |
|
: | 10.9790/0990-0705011925 |
Abstract: Stable isotopes are very useful to trace groundwater from their recharge origin as precipitation. This is due to the conservation of the meteoric signal during its subsurface flow. Thus, is very important to have a local meteoric line (LML) in every world region to more accurately adjust the interpretations of hydrological relationships and processes like recharge areas, evaporation, water mixtures and probable isotopic exchanges with rocks and sediments. The objective of this work is to analyze the isotopic composition of precipitations in the dry sub-humid sector of the Pampa plain of Córdoba, its connection with the meteorological conditions and the temporal variations to improve..........
Keywords : chemistry, isotopes, precipitation, Pampean plain
[1]. Dansgaard, W. (1964). Stable isotopes in precipitation. Tellus, 16: 436-468 p.
[2]. Gat, J. (2010). Isotope hydrology: a study of the water cycle (Vol. 6). World scientific.
[3]. Clark, I. (2015). Groundwater geochemistry and isotopes. CRC press.
[4]. IAEA (2002). A new device for monthly rainfall sampling for GNIP. Water & Environment Issue 16: 5. Viena, Austria
[5]. IAEA/WMO (2019): Global Network of Isotopes in Rivers, http://www-naweb.iaea.org/napc/ih/IHS_resources_gnir.html.
[6]. Dapeña, C., &Panarello, H. O. (1999). Development of the national network for isotopes in precipitation of Argentina. In II South American Symposium on Isotope Geology (pp. 503-508).
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| Paper Type | : | Research Paper |
| Title | : | GeoEnvironmental Implications of Heavy Metals Distribution in Parts of Lagos Lagoon, Southern Nigeria |
| Country | : | Nigeria |
| Authors | : | Obua Uchenna H. || Okeke Osita C. || Onyekuru Samuel O. || Ibeneme Sabinus I. || Obua Pamela C. |
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: | 10.9790/0990-0705012634 |
Abstract: The study investigated the level of heavy metals in surface waters and sediments in the Lagos Lagoon, Lagos State. Water and sediment samples were collected in sterile plastic containers respectively from 8 sampling locations inclusive of a control. The samples were treated and digested and analyzed using the Atomic Absorption Spectrophotometer (AAS).The t-test, single factor ANOVA, post-hoc means plot and Principal Components Analysis (PCA) were used to analyze data. Cu, Zn, Cd, Mn, Ni,Cr and Fe varied as follows: 1.97-5.60(3.07) mg/L in water columns and 9.9-527.35 ppm in sediments,1.58 – 6.99(3.03 )mg/L in water columns and 37.69 – 875.64 ppm, 0.18–0.93 (0.62)mg/L and 0.37–11.46 ppm, 4.48–11.28 (8.51) mg/L and 184.95–547.45ppm, 9.83-20.50 (14.54.........
Keywords : Surface water, Sediment, Physiochemical, Lagoon, Heavy metals, Industries, Wastes, Pollution
[1]. Olatunji, A.S and Abimbola, A.F, 2010. Geochemical Evaluation of the LagosLagoon Sediments and Water, World Applied Sciences Journal 9 (2): 178-193.
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[4]. Omatshola, M.E. and O.S. Adegoke, (1981): The tectonic evolution and Cretaceous stratigraphy of theDahomey Basin. J. Mining and Geol., 54: 65-87.
[5]. Ogbe, F.G.A. (1972): Stratigraphy of Strata Exposed in the Ewekoro Quarry, Western Nigria. African Geology, University of Ibadan Press, Ibadan, 305-322.