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The Cameroon Hot Line (CHL): A unique example of active alkaline intraplate structure in both oceanic and continental lithospheres
The Cameroon Hot Line (CHL) is an active N30°E tectono-magmatic alignment, extending from Pagalu Island to Lake Chad. Its oceanic sector is comprised of six major volcanoes, and the continentalExpand
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The 616 Ma Old Egersund Basaltic Dike Swarm, Sw Norway, and Late Neoproterozoic Opening of the Iapetus Ocean
The Egersund dike swarm of SW Norway is made up of 11 basaltic dikes trending ESE‐WNW. Two groups are defined: porphyritic dikes with bytownite phenocrysts of tholeiitic affinity and aphyric dikes ofExpand
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Petrogenesis of Neoproterozoic Granitoids and Related Rocks from the Seychelles: the Case for an Andean-type Arc Origin
compositions ( Nd 750 = +5·46 to −0·87; ISr 750 = 0·7021– The Seychelles islands consist of undeformed and unmetamorphosed, 0·7061) that can be modelled as basaltic magmas derived from metaluminousExpand
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Strontium isotope composition as a tracer of calcium sources in two forest ecosystems in Belgium
The two main sources of Ca in forest ecosystems are mineral weathering release and atmospheric inputs. We use the 87 Sr/ 86 Sr isotopic ratio (Sr is used as a proxy for Ca) to determine the CaExpand
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Sr and O isotope constraints on source and crustal contamination in the high-K calc-alkaline and shoshonitic neogene volcanic rocks of SE Spain
The Neogene volcanic province of SE Spain NVPS is characterized by calc-alkaline CA , high-K calc-alkaline KCA , . . . shoshonitic SH , ultrapotassic UP , and alkaline basaltic AB volcanic series.Expand
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Petrogenetic processes in the ultramafic, alkaline and carbonatitic magmatism in the Kola Alkaline Province: A review
Igneous rocks of the Devonian Kola Alkaline Carbonatite Province (KACP) in NW Russia and eastern Finland can be classified into four groups: (a) primitive mantle-derived silica-undersaturatedExpand
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UPb and LuHf isotopes in baddeleyite and zircon megacrysts from the Mbuji-Mayi kimberlite: constraints on the subcontinental mantle
Megacrysts of baddeleyite (ZrO2) and zircon (ZrSiO4) from the diamond-bearing Mbuji-Mayi kimberlite were analyzed to determine their age, origin, and mantle source characteristics. Two of the fiveExpand
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Rare earth element geochemistry and strontium isotopic composition of a massif-type anorthositic-charnockitic body: the Hidra Massif (Rogaland, SW Norway)
Abstract The Hidra Massif (Rogaland Complex, SW Norway) mainly consists of plagioclase cumulates (anorthosites and leuconorites), which grade progressively into a fine-grained (200 μm). locallyExpand
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Redistribution of rare earth elements, thorium, and uranium over accessory minerals in the course of amphibolite to granulite facies metamorphism: The role of apatite and monazite in orthogneisses
The amphibolite to granulite facies transition has been studied in a high-K calc-alkaline, hornblende-biotite, K-feldspar megacrystic augen gneiss series from the Rogaland-Vest-Agder (Rog-VA) sectorExpand
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Nitrogen and carbon isotopic composition in the diamonds of Mbuji Mayi (Zaïre)
The concentration and isotopic composition of nitrogen, measured in large diamonds (gram size) from the Mbuji Mayi kimberlite district (Zaire) show a large range of variation (100<N<2100 ppm,Expand
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