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Article
The basalts of Réunion Island, Indian Ocean
Réunion consists of two shield volcanoes, Piton des Neiges (3069 m) and Piton de la Fournaise (2631 m). The former is extinct and deeply eroded, so that its internal structure is clearly displayed. The deepest...
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Article
Early volcanic rocks of réunion and their tectonic significance
A great sequence of hydrothermally altered and tectonically disturbed lavas and breccias is exposed in the erosional cirques of Piton des Neiges volcano, Réunion. These rocks are cut by intense swarms of minor...
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Article
Peridotitic and gabbroic rocks associated with the shield-forming lavas of réunion
The peridotitic and gabbroic rocks described occur a) as a tectonically emplaced layered body in Piton des Neiges volcano, b) as blocks in basaltic agglomerate, Piton des Neiges, and c) as nodular inclusions i...
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Article
The 1972 Eruption of Kartala volcano, grande comore
A summit eruption of Kartala commenced on September 8th, 1972 and finished on October 5th, 1972. In the course of this eruption, approximately 5×106 m3 of alkali olivine basalt was erupted from a N-S fissure syst...
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Article
Pre-Palaeozoic basement of the Scottish Midland Valley
THE tuffs and agglomerates associated with Carboniferous volcanism within the Scottish Midland Valley comprise predominantly basic volcanic and unmetamorphosed sedimentary fragments. For the most part, the for...
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Chapter and Conference Paper
The Gardar Igneous Province: Evidence for Proterozoic Continental Rifting
Three principal episodes (at c. 1300, 1250 and 1170 Ma.) of faulting and associated alkaline magmatism are recognised in the evolution of the Gardar province in south Greenland.
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Chapter
Oceanic Islands
The floor of the Indian Ocean comprises a complex array of deep basins, separated by aseismic swells or ridges, in addition to the seismic Mid-Indian Ocean Ridge. While the “Ninetyeast Ridge” is wholly submari...
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Article
Petrology and geochemistry of Rodrigues Island, Indian Ocean
Rodrigues Island is composed of a differentiated series of transitional-mildly alkaline olivine basalts. The lavas contain phenocrysts of olivine (Fo88−68)±plagioclase (An73−50), together with a megacryst suite i...
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Chapter
Gabbroic, Syenogabbroic and Syenitic Cumulates of the Tugtutôq Younger Giant Dyke Complex, South Greenland
The Tugtutôq Younger Giant Dyke Complex comprises an interconnecting suite of dykes, individually up to 800 m broad, traceable for some 145 km through a Proterozoic granitic terrain. The intrusion is thought t...
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Article
Sub-volcanic crystallization at Sete Cidades volcano, São Miguel, Azores, inferred from mafic and ultramafic plutonic nodules
Suites of coarse-grained clasts (“plutonic nodules“) within the scoria of two separate mafic post-caldera parasitic vents, on Sete Cidades volcano, are described. These involve dunites, wehrlites, olivine clin...
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Article
Constraints on petrogenesis of mesoproterozoic CFBS from the SE fennoscandian shield: Trace element and Nd isotopic evidence
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Article
The petrology of the Ditrau alkaline complex, Eastern Carpathians
¶The Ditrau complex in eastern Transsylvania, Romania is a large (ca. 18 km diameter) Mesozoic alkaline igneous complex generated in an extensional environment associated with a rifted continental margin. It c...
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Article
The Mesoproterozoic Zig-Zag Dal basalts and associated intrusions of eastern North Greenland: mantle plume–lithosphere interaction
The lavas of the Zig-Zag Dal Formation of eastern North Greenland constitute a Mesoproterozoic tholeiitic flood basalt succession up to 1,350 m thick, extending >10,000 km2, and underlain by a sill complex. U–Pb ...
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Article
Eruptive history of an alkali basaltic diatreme from Elie Ness, Fife, Scotland
The Elie Ness diatreme (Fife, Scotland) is an ideal place to study the internal architecture and emplacement processes of diatremes. Elie Ness is one of approximately 100 alkali basaltic diatremes and intrusio...