Mumbfu Ernestine Mimba

Institut de Recherches Géologiques et Minières

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i-10 index

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Co-Authors

Takeshi Ohba

Tokai University

Salomon César Nguemhe Fils

Institut de Recherches Géologiques et Minières

Mengnjo Jude Wirmvem

University of Buea

Festus Tongwa Aka

Institut de Recherches Géologiques et Minières

Melvin Tamnta Nforba

ICF International (United States)

Nozomi Numanami

Tokai University

Tasin Godlove Bafon

University of Bamenda

Cheo Emmanuel Suh

University of Bamenda

Brice Tchakam Kamtchueng

Institut de Recherches Géologiques et Minières

Wilson Y. Fantong

Institut de Recherches Géologiques et Minières

Cooperative Institutions

Institut de Recherches Géologiques et Minières

Université de Yaoundé I

University of Buea

University of Bamenda

Ministry of Scientific Research and Innovation

University of Maroua

Mangosuthu University of Technology

National Radiation Protection Agency of Cameroon

University of Liège

Université de Dschang

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Upper Triassic mafic dykes of Lake Nyos, Cameroon (West Africa) I: K-Ar age evidence within the context of Cameroon Line magmatism, and the tectonic significance

Journal of African Earth Sciences (2018)

Festus Tongwa Aka Takeshi Hasegawa Linus Anye Nche Asobo Nkengmatia Elvis Asaah Mumbfu Ernestine Mimba

Supercontinent

10.1016/j.jafrearsci.2018.02.001

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Citations (22)

Monitoring and Environmental Assessment of Seawater in West Central Africa: Case of the Kribi Industrial and Urban Port Complex in Cameroon, Guinea Gulf

Journal of Geoscience and Environment Protection (2021)

Mioumndè Arthur Paterne Kusi Micheline Michelle-Alexia Ngum Kag Simon Pierre Kue Petou Rokis Malquaire Mumbfu Ernestine Mimba

This study is the first of a series of a project on the development and implementation of environmental protection policies, before, during and after the construction of the Kribi Industrial and Urban Port Complex (KIPC). The results will equip the State and scientific structures concerned with the protection of people, water resources and the environment as a whole. This includes reference data on the state of marine pollution in the region dating from the end of realization of the first phase of KIPC known as Kribi Deep-Water Harbor (KDWH). Accordingly, the aim of this work is to assess the current state of KIPC and its surrounding by quantifying the preliminary parameters of suspended matter (SM); to analyze the physical and chemical parameters, chemical pollution indicators for anions and major cations and organic pollution indicators of four water samples taken from four different sites in the project area by filtration and weighing, pH meter, turbid meter, titration, colorimetry and titrimetric methods. The analysis of these samples and these parameters provides results which are slightly similar to international standards. This suggests that the environment remains relatively healthy. Hence, continuous management and monitoring of the parameters and pollution factors is strongly recommended.

Port (circuit theory)

Environmental Monitoring

10.4236/gep.2021.96010

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Citations (2)

Geochemical Behavior of REE in Stream Water and Sediments in the Gold-Bearing Lom Basin, Cameroon: Implications for Provenance and Depositional Environment

Aquatic Geochemistry (2019)

Mumbfu Ernestine Mimba Mengnjo Jude Wirmvem Salomon César Nguemhe Fils Nozomi Numanami Melvin Tamnta Nforba

Felsic

Rare-earth element

Trace element

Biogeochemical Cycle

10.1007/s10498-019-09365-8

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Citations (2)

Texture and iron‐oxygen isotope composition of magnetite in the Sanaga iron ore prospect, Nyong Series, southwestern Cameroon: Implications for the origin of the magnetite mineralization

Geological Journal (2023)

Tasin Godlove Bafon Anthony Temidayo Bolarinwa Cheo Emmanuel Suh Ralain Bryan Ngatcha Mumbfu Ernestine Mimba

The Sanaga iron ore prospect within the Palaeoproterozoic Nyong Series in Cameroon is a magnetite‐dominated iron ore deposit hosted within granodioritic gneisses with an estimated resource of 82.9 Mt @ 32.1% Fe. The main ore mineral being magnetite, provides an opportunity to study the magnetite texture and iron‐oxygen isotope composition of the mineralization, which has heretofore not been reported. These offer insights into the nature and condition of formation of the mineralization thereby paving the way for better understanding the genesis and evolution of the mineralization as well as classifying it. The mineralization is characterized by Type I and Type II magnetite varieties based on their textural features. Type I magnetite is the dominant magnetite and is characterized by ilmenite oxy‐exsolution features with triple junction contacts, while Type II magnetite lacks these features. The presence of ilmenite oxy‐exsolution features in the Type I magnetite indicates a primary magmatic formation of the magnetite followed by re‐equilibration of primary Ti‐rich magnetite in the presence of a high‐temperature fluid. Oxygen isotope (δ 18 O) values for the magnetite range from +2.89% to 9.30‰ indicating precipitation from evolved ore‐forming fluids through reaction with country rocks. The iron isotope (δ 56 Fe) of the magnetite shows little variation, with positive values ranging from +0.49–0.66‰. These values plot within the magmatic and magmatic‐hydrothermal magnetite fields when compared to the published global range of δ 56 Fe values for different deposit types. A similar result is obtained by plotting the coupled Fe–O isotope pair, further buttressing the magmatic‐hydrothermal origin of the mineralization. Based on these data, the Sanaga iron mineralization is best explained as a magmatic‐hydrothermal deposit.

Ilmenite

Banded iron formation

Iron ore

Pegmatite

10.1002/gj.4727

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Citations (5)

Water quality characteristics of Lake Nyos, Cameroon

Japan Geoscience Union (2016)

Muga Yaguchi Mumbfu Ernestine Mimba Ajiro Takuya Takeshi Ohba Gregory Tanyileke

Source

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Citations (0)

Major ions, trace elements and stable isotope characteristics of shallow groundwater in the Bonaberi district, Douala, Cameroon

Sustainable Water Resources Management (2022)

Brice Tchakam Kamtchueng Aicha Foupouagnigni Mero Yannah Joséphine Ndjama Mumbfu Ernestine Mimba

10.1007/s40899-022-00737-7

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Citations (2)

Geochemical Dispersion of Gold in Stream Sediments in the Paleoproterozoic Nyong Series, Southern Cameroon

Science Research (2014)

Mumbfu Ernestine Mimba

Twenty-five stream sediment samples were collected in the Ngovayang area of southern Cameroon over a 1100 km2 area for heavy mineral fraction geochemical survey. The heavy mineral fraction of the stream sediments was analyzed for 45 trace elements. The majority of samples showed high Au concentrations though the anomalies were erratic. The geochemical data were processed using statistical and spatial analytical methods. R-mode Factor analysis produced a four-factor model which accounted for 77.02 % of the total variance in the data with the following metal associations: U-Th-Pb-W, Nb-Ta-Co-V, Au-Hf and Cu. The Au-Hf association indicated gold mineralization while the others reflect lithologic control. Uranium, Pb, Co, Ni and Ag show an almost uniform distribution within the Nyong Series indicating essentially the lithology. Anomalous gold concentrations clustered mostly in the northeastern part of the study area defining a potential primary gold target.

Lithology

Heavy mineral

10.11648/j.sr.20140206.12

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Citations (26)

Multi-tracer (δ18O, δD, 3H, CFCs and SF6) investigation of groundwater recharge and apparent age at the Bamenda Highlands along the Cameroon volcanic line

Sustainable Water Resources Management (2020)

Mengnjo Jude Wirmvem Brice Tchakam Kamtchueng Engome Regina Wotany Mumbfu Ernestine Mimba Wilson Y. Fantong

TRACER

δ18O

10.1007/s40899-020-00357-z

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Citations (4)

Statistical evaluation of stream sediment geochemical data from Tchangue-Bikoui drainage system, Southern Cameroon: a regional perspective

Geology Ecology and Landscapes (2020)

Melvin Tamnta Nforba Kingsley Ayamba Egbenchung Nelvice Layu Berinyuy Mumbfu Ernestine Mimba Emmanuel Tangko Tangko

Stream sediments play a significant role in geochemical exploration by identifying possible sources of anomalous element concentration. In this study, we use a multi-element association analysis to investigate the concentration of gold and associated elements in stream sediment samples from the Tchangue-Bikoui drainage area, Southern Cameroon. The main river and its tributaries were sampled, panned for gold grain recovery and the 100 μm size fractions analyzed for Au and associated elements by inductively coupled plasma atomic emission spectrometry (ICP-AES). A total of 50 samples were collected defining an area of ~145 km2 and 20 samples selected for geochemical analysis for a suite of 20 elements. Gold grades estimated by the panning and weighing technique rarely exceed 0.45 g/t and generally erratic while the Au concentrations from chemical analysis range from 0.01ppb to 4.00ppb. R-mode factor analysis produced a five-factor model accounting for 62.4% of the total variance. The Ni-Au-V-Sr association indicated gold mineralization while the others reflect lithologic control. Mo-Cr-Hg-Ag-As-Zr and Pb-Cu show no spatial relationship to Au and point to a typical primary mesothermal sulphide mineralization in the area which can be further investigated. Anomalous gold concentrations clustered mostly in the southeastern part downstream of River Tchangue defining a potential primary gold target.

Mesothermal

Lithology

Trace element

10.1080/24749508.2020.1728023

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Citations (15)

Baseline concentrations of trace metals in stream sediments of the lower Lom Basin, East Cameroon: Implications for environmental studies

EGUGA (2018)

Mumbfu Ernestine Mimba Takeshi Ohba Salomon Nguemhe Fils Melvin Tamnta Nforba Nozomi Numanami

Baseline (sea)

TRACE (psycholinguistics)

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Citations (0)