Mineralogy and geochemistry of pozzolans from the Tombel Plain,Bamileke Plateau,and Noun Plain monogenetic volcanoes in the central part of the Cameroon Volcanic Line

作     者：Mbowou Ngantche Igor Fulbert Owona Sebastien Chako Tchamabe Boris Lissom Justin Lanson Bruno Ekodeck Georges Emmanuel Mbowou Ngantche Igor Fulbert;Owona Sébastien;Chako Tchamabe Boris;Lissom Justin;Lanson Bruno;Ekodeck Georges Emmanuel

作者机构：Faculty of ScienceDepartment of Earth SciencesUniversity of DoualaP.O.Box 24157DoualaCameroon Faculty of ScienceDepartment of GeologyUniversity of Buea.P.O.Box 63BueaCameroon CONACYT-Centro de Ingenieria y Desarrollo Industrial(Sede Campeche)Av.Playa Pie de la Cuesta N°702Desarrollo San PabloP.O.Box.76125QueretaroMexico Institut des Sciences de la Terre(ISTerre)Maison des Sciences de la TerreP.O.Box 5338041 Grenoble Cedex 9France Faculty of ScienceDepartment of Earth SciencesUniversity of Yaounde IP.O.Box:812YaoundeCameroon 

出 版 物：《Acta Geochimica》 (地球化学学报（英文）)

年 卷 期：2020年第39卷第6期

页      面：830-861页

核心收录：

学科分类：070902[理学-地球化学] 0709[理学-地质学] 0819[工学-矿业工程] 070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：Authors are thankful to the ISTerre of Grenoble(France)and Nathaniel Findling for hosting and training the first author on the XRD technique and Rietveld method interpretation as part of his Ph.D.research work.The authors are also thankful to the Ministry of Higher Education of Cameroon for providing Research Modernization Allowance(RMA)that has been very helpful to support part of the field trip and Geochemical analysis expenses 

主　　题：Pozzolans Mineralogy Geochemistry Pozzolanicity Monogenetic volcanic fields Cameroon Volcanic Line 

摘      要：Pozzolans from the Tombel Plain,Bamileke Plateau,and Noun Plain,3 monogenetic volcanic fields in the central part of the Cameroon Volcanic Line(the Tombel Plain,Bamileke Plateau,and Noun Plain),were explored in order to constrain their petrology and make some predictions on their *** rocks in this study include alkaline and subalkaline basalts,trachybasalts,and *** of these rocks present an overall composition that overlaps with primitive mantle,suggesting rapid ascent of magmas,limited crustal contamination and crystal fractionation of olivine,clinopyroxene,and *** pozzolans present enrichment of LREE relative to HREE and high chondrite normalized ratios of La/Yb and Tb/*** between 7 and 20 and1.9 respectively,similar to those of Ocean Island *** other nearby volcanoes,partial melting in a dominantly garnet-bearing mantle zone can be *** mineralogy by X-ray diffraction revealed various mineral phases with dominantly plagioclase,augite,olivine,and Fe-Ti *** samples contains important amorphous phase up to 23,51,and 69 wt%in the Tombel Plain,Noun Plain,and Bamileke Plateau,*** elevated amount of amorphous phases together with the sum of SiO2,Al2O3 and total Fe2O3(SAI=68.50-83.5070 wt%)according to ASTM C618 standard and the sum of CaO,FeO,and MgO(CIM=14.5-30.52 wt%and 23.58-31.08 wt%)suggest interesting pozzolanicity character for the studied pozzolans.