@Article{crph6101,
AUTHOR = {Yana, Roland William Edima and Atouba, Lise Carole Okomo and Mefire, Fagny Aminatou and Djiddi, Oumar Hamit and Haman, Adama and Ella, Anicet Ango and Nkouandou, Faarouk Oumarou},
TITLE = {Geochemistry distributions and statistics analysis of REE in stream sediments from the watershed west of Mambaka (Adamawa Plateau, Cameroun)},
JOURNAL = {Current Research in Public Health},
VOLUME = {4},
YEAR = {2025},
NUMBER = {1},
PAGES = {12-28},
URL = {https://www.scipublications.com/journal/index.php/WJGG/article/view/6101},
ISSN = {2831-5162},
DOI = {10.31586/wjgg.2025.6101},
ABSTRACT = {The Mambaka watershed is extends between latitudes 1 3°45'E and 14°15'E and longitudes 7°16'N and 6°45'N. The geology, various tectonic and structural events that have affected the Adamawa Plateau in Cameroon make it rich in multi-substance mining. The objective of this study is to map rare earth (REE) geochemical anomalies in the sediments of the watershed streams west of Mambaka, and to trace their origins and geochemical processes. Predictive maps from inverse distance interpolations (IDW), factor analysis (F1) or principal component analysis (PCA) and hierarchical bottom-up classification maps provided a better understanding of the central tendency, distribution and dispersion of REE in the samples and in the study area, based on standard deviation and variance values that generated two factors F1 (Ho-Tm-Er-Yb-Lu-Dy-Tb-Gd-Eu-Sm) and F2 (Pr-Nd-Ce-La-Sm) representing 92.44% of the total cumulative variance. The ratios Ce/Ce* > 0.78 and Eu/Eu* > 1 demonstrate positive anomalies in Ce and Eu, and clear differentiation. The normalized concentrations used to calculate fractionation ratios show that the values for LaN/YbN (0.58 to 1.34), LaN/SmN (0.61 to 0.88) and LaN/LuN (0.62 to 1.43) suggest higher fractionation in SS09 and lower fractionation in SS01. Similarly, the ratios La/Lu (61.71 to 143.46), La/Yb (9.00 to 20.72), La/Sm (4.02 to 5.83) and La/ Lu (61.71 to 143.46) confirm these higher ratios in SS09 and lower in SS01. The REE in the study area comes from hydrothermal processes based on high lineament densities at sampling points in igneous rocks with a mean ∑REE value of between 174-219 ppm.},
}

%0 Journal Article
%A Yana, Roland William Edima
%A Atouba, Lise Carole Okomo
%A Mefire, Fagny Aminatou
%A Djiddi, Oumar Hamit
%A Haman, Adama
%A Ella, Anicet Ango
%A Nkouandou, Faarouk Oumarou
%D 2025
%J Current Research in Public Health

%@ 2831-5162
%V 4
%N 1
%P 12-28

%T Geochemistry distributions and statistics analysis of REE in stream sediments from the watershed west of Mambaka (Adamawa Plateau, Cameroun)
%M doi:10.31586/wjgg.2025.6101
%U https://www.scipublications.com/journal/index.php/WJGG/article/view/6101

TY  - JOUR
AU  - Yana, Roland William Edima
AU  - Atouba, Lise Carole Okomo
AU  - Mefire, Fagny Aminatou
AU  - Djiddi, Oumar Hamit
AU  - Haman, Adama
AU  - Ella, Anicet Ango
AU  - Nkouandou, Faarouk Oumarou
TI  - Geochemistry distributions and statistics analysis of REE in stream sediments from the watershed west of Mambaka (Adamawa Plateau, Cameroun)
T2  - Current Research in Public Health
PY  - 2025
VL  - 4
IS  - 1
SN  - 2831-5162
SP  - 12
EP  - 28
UR  - https://www.scipublications.com/journal/index.php/WJGG/article/view/6101
AB  - The Mambaka watershed is extends between latitudes 1 3°45'E and 14°15'E and longitudes 7°16'N and 6°45'N. The geology, various tectonic and structural events that have affected the Adamawa Plateau in Cameroon make it rich in multi-substance mining. The objective of this study is to map rare earth (REE) geochemical anomalies in the sediments of the watershed streams west of Mambaka, and to trace their origins and geochemical processes. Predictive maps from inverse distance interpolations (IDW), factor analysis (F1) or principal component analysis (PCA) and hierarchical bottom-up classification maps provided a better understanding of the central tendency, distribution and dispersion of REE in the samples and in the study area, based on standard deviation and variance values that generated two factors F1 (Ho-Tm-Er-Yb-Lu-Dy-Tb-Gd-Eu-Sm) and F2 (Pr-Nd-Ce-La-Sm) representing 92.44% of the total cumulative variance. The ratios Ce/Ce* > 0.78 and Eu/Eu* > 1 demonstrate positive anomalies in Ce and Eu, and clear differentiation. The normalized concentrations used to calculate fractionation ratios show that the values for LaN/YbN (0.58 to 1.34), LaN/SmN (0.61 to 0.88) and LaN/LuN (0.62 to 1.43) suggest higher fractionation in SS09 and lower fractionation in SS01. Similarly, the ratios La/Lu (61.71 to 143.46), La/Yb (9.00 to 20.72), La/Sm (4.02 to 5.83) and La/ Lu (61.71 to 143.46) confirm these higher ratios in SS09 and lower in SS01. The REE in the study area comes from hydrothermal processes based on high lineament densities at sampling points in igneous rocks with a mean ∑REE value of between 174-219 ppm.
DO  - Geochemistry distributions and statistics analysis of REE in stream sediments from the watershed west of Mambaka (Adamawa Plateau, Cameroun)
TI  - 10.31586/wjgg.2025.6101
ER  -