Mineralogy and Texture of the Weathered Products from Silicic Lavas in the Sabga Area, North West Cameroon  

作　　者：Edith Etakah Bate Tibang Gideon Anoma Waji Elisha Mutum Shemang Cheo Emmanuel Suh Edith Etakah Bate Tibang;Gideon Anoma Waji;Elisha Mutum Shemang;Cheo Emmanuel Suh(Department of Geology, Mining & Environmental Science, Faculty of Science, University of Bamenda, Bambili, North West Region, Cameroon;Economic Geology Unit, Department of Geology, University of Buea, Buea, South West Region, Cameroon;Department of Earth and Environmental Sciences, Botswana International University of Science and Technology, Palapye, Botswana)

机构地区：[1]Department of Geology, Mining & Environmental Science, Faculty of Science, University of Bamenda, Bambili, North West Region, Cameroon [2]Economic Geology Unit, Department of Geology, University of Buea, Buea, South West Region, Cameroon [3]Department of Earth and Environmental Sciences, Botswana International University of Science and Technology, Palapye, Botswana

出　　处：《International Journal of Geosciences》2021年第6期605-624,共20页地球科学国际期刊（英文）

摘　　要：Products of weathering usually clay minerals, are commonly characterized through mineralogical, chemical and geochemical analysis, emphasizing their implications in industrial applications, initiation of landslides and their impact on surface water geochemistry. In this study the vertical variations in textural characteristics and clay mineral type within weathered profiles in the Sabga area were investigated. Two exposed weathered profiles were logged from bed rock to topsoil and each horizon <span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">was </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">sampled separately. Granulometric analysis on the samples indicated mixtures of clay, silt and sand size particles in all horizons. Smectite and kaolinite were identified by X-ray diffractometry (XRD) and scanning electron microscopy (SEM). The two logs show that the lower horizons display whitish colors with fine laminations, middle horizons are brownish and the upper horizons display dark brown colors. Graphic mean values for both sections gave values that range between 2.02</span></span></span><span><span><span style="font-family:;" "=""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">-</span></span></span><span><span><span style="font-family:;" "=""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">3.7</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">f</span></span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> with an average standard deviation value of 1.9</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span styProducts of weathering usually clay minerals, are commonly characterized through mineralogical, chemical and geochemical analysis, emphasizing their implications in industrial applications, initiation of landslides and their impact on surface water geochemistry. In this study the vertical variations in textural characteristics and clay mineral type within weathered profiles in the Sabga area were investigated. Two exposed weathered profiles were logged from bed rock to topsoil and each horizon <span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">was </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">sampled separately. Granulometric analysis on the samples indicated mixtures of clay, silt and sand size particles in all horizons. Smectite and kaolinite were identified by X-ray diffractometry (XRD) and scanning electron microscopy (SEM). The two logs show that the lower horizons display whitish colors with fine laminations, middle horizons are brownish and the upper horizons display dark brown colors. Graphic mean values for both sections gave values that range between 2.02</span></span></span><span><span><span style="font-family:;" "=""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">-</span></span></span><span><span><span style="font-family:;" "=""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">3.7</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">f</span></span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> with an average standard deviation value of 1.9</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span sty

关 键 词：MINERALOGY Texture SEM Clay 

分 类 号：O17[理学—数学]