Mining Implication in the Geochemical Exploration of Fluvial Sediments of the East Nyambaka Volcanic Zone (Adamawa-Cameroon)

作     者：Roland William Edima Yana Augustin Désiré Balla Ondoa Lise Carole Okomo Atouba Mefire Aminatou Fagny Armel Zacharie Ekoa Bessa Nkouandou Oumarou Faarouk Roland William Edima Yana;Augustin Désiré Balla Ondoa;Lise Carole Okomo Atouba;Mefire Aminatou Fagny;Armel Zacharie Ekoa Bessa;Nkouandou Oumarou Faarouk

作者机构：Centre for Geological and Mining Research Garoua Cameroon Department of Earth Sciences Faculty of Sciences University of Ngaoundere Ngaoundere Cameroon Higher Teacher Training College of Bertoua University of Ngaoundere Bertoua Cameroon Department of Earth Sciences Faculty of Sciences University of Yaounde I Yaounde Cameroon 

出 版 物：《International Journal of Geosciences》 (地球科学国际期刊（英文）)

年 卷 期：2022年第13卷第5期

页      面：361-381页

学科分类：070902[理学-地球化学] 0709[理学-地质学] 07[理学] 

主　　题：Stream Sediments Geochemistry Mining Exploration Volcanic Zone East Nyambaka Cameroon 

摘      要：Geochemical characterization in stream sediments from Nyambaka locality was carried out on ten samples collected from the study area watershed. The distribution of trace metals in the sediments showed that some lithophiles (Be, Sc, V, Cr, Sr, Th, U), chalcophiles (Cu, Zn, Ga, As) and siderophiles (Mn, Co, Ni, Mo) have high average contents in the sediments compared to their average concentration in the upper crust. From the factorial analysis of the components, the total variance explained made it possible to represent and capture the main information on the data and to represent them in a graphical frame. Thus, using this graphical frame, the trace elements were divided into four groups opposed to each other. They show an enrichment of stream sediments in group 1 (Cr, Cu, Mn, Be, Ni, Co, Zr, Sr, Ba, Mg) and group 2 (Mo, As, Hg, V, Ag) elements more than group 3 (Ga, Sc, U) and group 4 (Au, Th). Rare earth analysis indicates a high abundance of Lanthanide (28.1 ppm to 42.4 ppm), a high concentration of light rare earth (LREE), and depletion of heavy rare earth (HREE). The variable LREE/HREE (7.24 LREE/ HREE 12.22) and (La/Yb)N (6.70 (La/Yb)N 11.72) ratios suggest an effect of heterogeneous sorting of heavy minerals with variable enrichment of dense and resistant minerals.