Geology and Geochemistry of the Chromiferous Mineralization in the External Zone of the Pan-African Dahomeyides Belt,Northwestern Benin(Gulf of Guinea,West Africa)  

作　　者：Luc Adissin Glodji Renaud Saizonou Fatchessin Bruno Adjo Adiss Kamal Issifou Fatiou Soulemana Yessoufou Basile Adjo Kanon 

机构地区：[1]Departement des Sciences de la Terre,Faculte des Sciences et Techniques,Universite d’Abomey-Calavi,Cotonou,Benin [2]Direction Generale des Mines,Cotonou,Benin

出　　处：《International Journal of Geosciences》2019年第12期1068-1080,共13页地球科学国际期刊（英文）

摘　　要：Occurrences of chromium mineral exist in Bénin within the external nappes of the Pan-African Dahomeyides belt. These chromite deposits are podiform types and hosted in the serpentinite. Blackish color, the chromite appears under microscope in transmitted light, as cracked phenocrystals with tangles of the serpentinite venules. Chemical analyses using X-ray fluorescence spectrometer showed the chromite ore consists of about 38% Cr2O3 and total (Cr2O3 + Al2O3) is 60%. This chromiferous mineralisation resulted from the magmatic cumulates formation by fractional crystallization of an ultramafic magma.Occurrences of chromium mineral exist in Bénin within the external nappes of the Pan-African Dahomeyides belt. These chromite deposits are podiform types and hosted in the serpentinite. Blackish color, the chromite appears under microscope in transmitted light, as cracked phenocrystals with tangles of the serpentinite venules. Chemical analyses using X-ray fluorescence spectrometer showed the chromite ore consists of about 38% Cr2O3 and total (Cr2O3 + Al2O3) is 60%. This chromiferous mineralisation resulted from the magmatic cumulates formation by fractional crystallization of an ultramafic magma.

关 键 词：Geology Geochemistry CHROMITE SERPENTINITE Buem BENIN 

分 类 号：P61[天文地球—矿床学]