Emmanuel Nomo Negue

Mineralogy, microstructures and geochemistry of gold-bearing calc-alkaline lamprophyres associated with I-type granites in the Lom Group, Adamawa–Yadé Domain, Cameroon

Emmanuel Nomo Negue, Dagwai Nguihdama, Fadimatou Yamgouot Ngounouno, Kepnamou Diguim Amadou, Raoul Yingyang Wanbitching, Ismaı̈la Ngounouno

Journal of African Earth Sciences

• #geological and geochemical analysis
• #clay minerals and soil interactions
• #geochemistry and geologic mapping
• #microstructure

Integrating multispectral remote sensing and geological investigation for gold prospecting in the Borongo-Mborguene gold field, eastern Cameroon

Jonas Didero Takodjou Wambo, Emmanuel Nomo Negue, Mamadou Traoré, Paul D. Asimow, Sylvestre Ganno, Amin Beiranvand Pour et 2 autre(s)

Advances in Space Research

• #geochemistry and geologic mapping
• #remote-sensing image classification
• #mineral processing and grinding
• #prospecting

Anatexis of metadiorite from the Yaoundé area, Central African Orogenic Belt in Cameroon: implications on the genesis of in-source granodiorite leucosomes

Victor Metang, Emmanuel Nomo Negue, Sylvestre Ganno, Jonas Didero Takodjou Wambo, Marcel Astrid Ewolo Teme, Arnaud Cedric Teda Soh et 5 autre(s)

Arabian Journal of Geosciences

• #geological and geochemical analysis
• #high-pressure geophysics and materials
• #geochemistry and geologic mapping
• #geology

Searching gold origin through litho-structural analysis and morphological characterization of alluvial gold nuggets in the Guiwa-Yangamo area (Batouri goldfield, Eastern Cameroon)

Emmanuel Nomo Negue, Jonas Didero Takodjou Wambo, Fadimatou Yamgouot Ngounouno, Jonathan Negou Nembouet, Arnaud Cedric Teda Soh, Achille Simplice Tsassé Nganno et 2 autre(s)

Arabian Journal of Geosciences

• #geochemistry and geologic mapping
• #geological and geochemical analysis
• #geochemistry and elemental analysis
• #alluvium

Use of Landsat 7 ETM + Data for the Geological Structure Interpretation: Case Study of the Ngoura-Colomines Area, Eastern Cameroon

Jonas Didero Takodjou Wambo, Sylvestre Ganno, Aloysius Afahnwie Ngambu, Emmanuel Nomo Negue, Joseph Mvondo Ondoa, Jean Paul Nzenti

Journal of Geosciences and Geomatics

Remote sensing and Geographical Information System (GIS) technology have opened a new era in the field of applied geology. In this study, combined field and remote sensing applications through the processing of the Landsat-7 Enhance Thematic Mapper Plus (ETM+) were used to monitor to geologic structures in Ngoura-Colomines area. This mapping approach led to the detection of 654 lineaments in which two main types have been distinguished. The type-I (15%) shows two main directions (NE-SW and NW-SE) and corresponds to large-scale or regional structures while type-II (85%) with dominant NE-SW-trends represents foliation trajectories. In addition, type-I lineaments are compatible with the Riedel fault system composed of P and P′ fractures oriented NE-SW and NNE-SSW respectively; E-W trending R fractures and R' fractures with NW-SE trends. Our findings provide the evidence of a polyphase ductile-brittle structures such as shear zone and faults. These structures constitute pathway for both mineralizing fluids and ground water circulation. Since several gold artisanal mines exist in Ngoura-Colomines area, the proposed mapping approach is an important guide for the identification of the structures that control the gold mineralisation in the area.

• #geochemistry and geologic mapping
• #mineral processing and grinding
• #hydrocarbon exploration and reservoir analysis
• #lineament

Petrography and Geochemistry of the Mbip Granitic Massif, SW Tcholliré (Central North Cameroon): Petrogenetic and Geodynamic Implication

Emmanuel Nomo Negue, Rigobert Tchameni, Olivier Vanderhaeghe, Pierre Barbey, Périclex Martial Fosso Tchunte, Jonas Didero Takodjou Wambo et 2 autre(s)

International Journal of Geosciences

In this article, we discussed about the petrography and geochemistry of magmatic rocks of the Mbip massif located SW of Tcholliré, in Central North Cameroon (Central African Fold Belt). Petrographic study shows that this massif is made of granodiorite, amphibole-biotite granite, and biotite granite which often contain enclave of mafic rocks (gabbro). Granodiorites and granites show porphyritic texture and consist dominantly of plagioclase and alkaline feldspar phenocrysts, quartz, biotite and often few amphibole. The gabbro enclaves are characterized by a granular porphyroid texture constituted of amphibole, plagioclase and olivine phenocrysts, all in a matrix of small crystals of plagioclase, olivine, amphibole, pyroxene and opaque minerals. All the analyzed rocks provide geochemical features of sublkaline serie and have nothing to do with the alkaline nature previously signaled in the former works. Granodiorites and granites are shoshonitic to calc-alkaline strongly potassic affinity consistent with emplacement in the continental collision setting. They present positive anomalies in Rb, Th, U; negative anomalies in Sr, P, Ti, Nb, Ta and some facies contain hydrated minerals such as amphibole. These characters are consistent with crustal and mantle contribution in their genesis. The mafic rocks (gabbro) have geochemical characteristics conferring a mantle origin, as confirmed by the high Mg# value (49.9). On the whole, the fractional crystallization of the magma formed by melting of crustal material and the magmatic mixing are the main petrogenetic process in the Mbip massif. Petrographic studies and geochemical data shows that the Mbip massif was emplaced in an active continental margin, into transitional regime from the end of maximum compression to the beginning of relaxation.

• #geological and geochemical analysis
• #geochemistry and geologic mapping
• #earthquake and tectonic studies
• #geology