Petrology and Geochemistry of Continental Rifts : Volume One of the Proceedings of the NATO Advanced Study Institute Paleorift Systems with Emphasis on the Permian Oslo Rift, Held in Oslo, Norway, July 27–August 5, 1977

Ladies and gentlemen, as is customary, I would like to ask you to stand and join with me in a few moments silence in memory of Professor Heezen. xx = 9 6 " 6 Front Matter....Pages i-xv Continental Rifting and Mantle Degassing....Pages 1-13 A Note on the Behavior of Incompatible Trace Elements in Alkaline Magmas....Pages 15-25 Geological and Geophysical Parameters of Mid-Plate Volcanism....Pages 27-28 Tectonic and Magmatic Evolution of the Southern Part of the Kenya Rift Valley....Pages 29-50 Some Aspects of the Metallogeny of Continental Rifting Events....Pages 51-54 The Afar Rift Junction....Pages 55-69 Petrology of Plio-Pleistocene Basaltic Rocks from the Central Rio Grande Rift (New Mexico, USA) and their Relation to Rift Structure....Pages 71-78 Rifting and Volcanism in the New Mexico Segment of the Basin and Range Province, Southwestern USA....Pages 79-86 Mineralogy of the Tullu Moje Active Volcanic Area (Arussi: Ethiopian Rift Valley)....Pages 87-100 The Volcanological Development of the Kenya Rift....Pages 101-121 Spatial and Temporal Variations in Basalt Geochemistry in the N. Kenya Rift....Pages 123-131 Rift-Associated Igneous Activity in Eastern North America....Pages 133-154 Basaltic and Alkalic Rocks of Southern Brazil: A Review....Pages 155-162 The Gardar Igneous Province: Evidence for Proterozoic Continental Rifting....Pages 163-172 Evidence for an Early Permian Oceanic Rift in the Northern North Atlantic....Pages 173-179 RB/SR — Relationship in the Oslo Igneous Rocks....Pages 181-184 Distribution of Th, U, K in the Plutonic Rocks of the Oslo Region, Norway....Pages 185-192 Origin of the Magmas of the Vestfold Lava Plateau....Pages 193-208 Petrology of the Skien Basaltic Rocks and the Early Basaltic (B 1 ) Volcanism of the Permian Oslo Rift....Pages 209-216 Composite Plutonic Ring-Complexes: A Structural Characteristic of Rift-Zone Plutonism....Pages 217-229 Petrogenesis of the Larvik Ring-Complex in the Permian Oslo Rift, Norway....Pages 231-236 Petrogenesis of the Holterkollen Plutonic Complex, Norway....Pages 237-244 Ore Deposits Related to the Keweenawan Rift....Pages 245-253 K/Ar Dating of Clay-Mineral Alteration Associated with Ore Deposition in the Northern Part of the Oslo Region....Pages 255-264 Further K/Ar Determinations on Clay Mineral Alteration Associated with Fluorite Deposition in Southern Norway....Pages 265-275 Ore Deposits in the North-Eastern Part of the Oslo Region and in the Adjacent Precambrian Areas....Pages 277-286 Back Matter....Pages 287-296 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. Grønlie 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 Proceedings of the NATO Advanced Study Institute, Oslo, Norway, July 27-August 5, 1977