Geochemical Trends in Weathering Profiles and Their Underlying Precambrian Basement Rocks in Akure,Southwestern Nigeria

作     者：Oluwatoyin O.Akinola Olusola A.Ola Olorun 

作者机构：Department of GeologyEkiti State UniversityAdo-EkitiNigeria 

出 版 物：《Journal of Environmental & Earth Sciences》 (地球与环境科学（英文）)

年 卷 期：2021年第3卷第2期

页      面：7-13页

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

主　　题：Akure Nigeria Geochemical trends In-situ weathering profile Kaolinitic 

摘      要：Akure area in southwestern Nigeria falls within the basement complex underlain by migmatite,quartzite granite and *** features of these crystalline rocks and their overlying in-situ weathering profiles are investigated and *** result from ICP-MS facility at the University of Malaya reveals average SiO_(2) content in quartzite(91.1%),granite(73.8%),migmatite(67.4%)and charnockite(58.6%)categorize the rocks as ***_(2) contents in the weathering profiles above these rocks are 61.9%,60.2%,52.2%and 54.6%*** contents in the weathering profiles overlying quartzite(23.8%),granite(19.9%),migmatite(26.3%)and charnockite(24.3%)are substantially higher than the precursor *** the same order,average alkali(Na_(2)O+K_(2)O)contents in the profiles are 3.38%,3.42%,3.48%and 2.68%.Chemical features of the profiles reflect that there exists some correlation between the chemistry of crystalline basement and their in-situ weathering *** residual soils contain low plastic clays with kaolinitic characteristics and compare well with other clays reported from other parts of Nigeria basement complex.