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| Characteristics of Alkali Magma Differentiation at the Cape Verde Islands L. N. Kogarko Vernadsky Institute of Geochemistry...15, 2008 Abstract—Parental magmas of the Cape Verde Islands are high-Mg foidites, picrobasalts, and basanites...the composition of volcanic rocks from the Cape Verde Islands within the scope of the system olivine–diopside–nepheline...INTRODUCTION The Cape Verde Archipelago 450 km off the West African shore consists of 118 islands, which compose...southern (Maio, São Tiago, Fogo, and Brava) chains of volcanic genesis. Volcanism at the Cape Verde Islands |
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| the denudation of volcanic islands under sub-tropical climate (Cape Verde) ⁎ Pedro A. Dinisa, , Marina...composition of the sediments produced in volcanic islands when the climate does not favour weathering. The...samples collected in the “old” Maio and the “young” Fogo islands of Cape Verde archipelago are used to investigate...transformations promoted by exogenous processes during island denudation. The main factor responsible for the...elements are enriched via weathering are useless in Cape Verde bedload sediments. With time, weathering is able |
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| Mitchell -Thomé GEOLOGY OF THE SOUTH ATLANTIC ISLANDS 1970 GEBRUDER BORNTRAEGER - BERLIN - STUTTGART...STUTTGART GHOPOGY SOUTH OF, PHE ATLANTIC ISLANDS by Dr. Raoul C. Mitchell -Thomé Consulting Geologist-Geophysicist... Preface The volume herewith treats only of those islands lying in the South Atlantic. There is a valid argument...ago. Dotted throughout these watery wastes are islands, all character- ized, with scarce an exception...to treat in one volume the entire collection of islands of the Atlantic Ocean rather than merely those |
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| phaseequilibria ll(2) 121-131 Aegean Islands see also Greek Aegean Islands heat flow 33( l-3) 3-30 Aegean Sea...mineralogy 12(2) 109-114 Africa see also Cape Verde Islands; Central Africa; East Africa; Madagascar;...petrology 22( I) 13-23 Alaska geochemistry Aleutian Islands 33( l-3) 169-188 Brooks Range 35( l-2) l-25 structural...olivine basalt geochemistry 27(I) 43-57 Aleutian Islands France 12(2) I IS-132 Iceland 5(4) 365-386 India...347-350 magmas I l(3) 243-249 alkali gabbros see essexite; ijolite; leucitite; melteigite; nephelinite; |
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| began a detailed geological survey of the Alné Island complex and announced his results in a series of...recognition of the carbonatitic nature of the Chilwa Island, Nyasaland, occurrence (Dixey et al., 1937), Larsen...als eine Bildung analog den Pegmatiten.” Chilwa Island in Lake Chilwa, Nyasaland, was first examined geologically...p. 2) Dixey is quoted: ‘The limestone of Chilwa Island is not a flat-lying sedimentary formation but a...GEOLOGY OF CARBONATITES Figure 1-2 View of Chilwa Island, Nyasaland;showing flat-topped, peneplained carbonatite |
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| and genesis, in some oceanic islands is typified by the Canary Islands case. It is important to note...known in the world are located in the Canary and Cape Verde Is., at this northwestern African Plate. The...207 207 208 208 XVIII Contents 7 The Canary Islands: Thctonics, Magmatism and Geodynamic Framework...Evolution of the Canary Islands Area... . . ... 3 The Crust Under the Canary Islands Region ...............and Identity of Vertical Movements in the Canary Islands Region ........................... 4.1 Transoceanic |
