Petrology and Geochemistry of Continental Rifts

The NATO Advanced Study Institute "Paleorift Systems with Emphasis on the Permian Oslo Rift" was held at Sundvollen near Oslo, Norway, 26. July - 5. August, 1977. The meeting included 6 field trips to various parts of the Oslo Region. 70 official participants and 16 observers from 14 countries attended the meeting. The majority of the invited lectures and short research papers and progress reports presented at the meeting are published in two volumes of which this is volume No. I. Lists of content for both volumes are presently included. The guide to the field trips is being published in the Norwegian Geological Survey Series (1978). Oslo, 10. November 1977. Else-Ragnhild Neumann Ivar B. Ramberg Organizing Committee members: O. Eldholm Geological Institute, University G. Gr Ct. nlie of Oslo J. Naterstad I.B. Ramberg (chairman) Mineralogical-Geological Museum, J.A. Dons B.T. Larsen (secretary) University of Oslo E.-R. Neumann (secretary) K.S. Heier (chairman) Norwegian Geological Survey S. Huseby B. Sundvoll Seismological Observatory, University M.A. Sellevoll of Bergen Geophysics Institute, University of K. Storetvedt Bergen Geological Institute, University of P.M. Ihlen Trondheim Chr. Oftedahl F.M. Vokes NORSAR, 2007 Kjeller E.S. Husebye This volume is Scientific Report No. 39 of the Geodynamics project. The Geodynamics project is an international programme of research on the dynamics and dynamic history of the Earth with emphasis on deep-seated foundations of geological phenomena.

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Proceedings of the NATO Advanced Study Institute, Oslo, Norway, July 27-August 5, 1977

Contenu
General Aspects of Rifting.- Continental Rifting and Mantle Degassing.- A Note on the Behavior of Incompatible Trace Elements in Alkaline Magmas.- Geological and Geophysical Parameters of Mid-Plate Volcanism.- Tectonic and Magmatic Evolution of the Southern Part of the Kenya Rift Valley.- Some Aspects of the Metallogeny of Continental Rifting Events.- Active Continental Rifts.- The Afar Rift Junction.- Petrology of Plio-Pleistocene Basaltic Rocks from the Central Rio Grande Rift (New Mexico, USA) and their Relation to Rift Structure.- Rifting and Volcanism in the New Mexico Segment of the Basin and Range Province, Southwestern USA.- Mineralogy of the Tullu Moje Active Volcanic Area (Arussi: Ethiopian Rift Valley).- The Volcanological Development of the Kenya Rift.- Spatial and Temporal Variations in Basalt Geochemistry in the N. Kenya Rift.- Paleorifts.- Rift-Associated Igneous Activity in Eastern North America.- Basaltic and Alkalic Rocks of Southern Brazil: A Review.- The Gardar Igneous Province: Evidence for Proterozoic Continental Rifting.- Evidence for an Early Permian Oceanic Rift in the Northern North Atlantic.- RB/SR-Relationship in the Oslo Igneous Rocks.- Distribution of Th, U, K in the Plutonic Rocks of the Oslo Region, Norway.- Origin of the Magmas of the Vestfold Lava Plateau.- Petrology of the Skien Basaltic Rocks and the Early Basaltic (B1) Volcanism of the Permian Oslo Rift.- Composite Plutonic Ring-Complexes: A Structural Characteristic of Rift-Zone Plutonism.- Petrogenesis of the Larvik Ring-Complex in the Permian Oslo Rift, Norway.- Petrogenesis of the Holterkollen Plutonic Complex, Norway.- Metallogeny.- Ore Deposits Related to the Keweenawan Rift.- K/AR Dating of Clay-Mineral Alteration Associated with Ore Deposition in the Northern Part Of the OsloRegion.- Further K/AR Determinations on Clay-Mineral Alteration Associated with Fluorite Deposition in Southern Norway.- Ore Deposits in the North-Eastern Part of the Oslo Region and in the Adjacent Pre-Cambrian Areas.