East African Rifts - 1st Edition - ISBN: 9780444410870, 9781483257150

East African Rifts

1st Edition

Editors: R. W. Girdler
eBook ISBN: 9781483257150
Imprint: Elsevier
Published Date: 1st January 1972
Page Count: 192
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Developments in Geotectonics, 7: East African Rifts focuses on the movements, structure, and behavior of the East African rift system.
The selection first offers information on the surface structure and plate tectonics of Afar; tectonic and magmatic significance of volcanism in the Afar depression; and preliminary interpretation of the gravity field of Afar, northeast Ethiopia. Discussions focus on crustal models of Afar based on gravity and seismic data, tectonics, volcanism, geological setting, and crustal extension.
The text also elaborates on the gravity survey of the central part of the Ethiopian Rift Valley and an aeromagnetic survey of the Afar triangle of Ethiopia. The book examines the arrangement and development of continental rift zones, East African rift development, and the seismicity of the East African rift system. Topics include earthquake mechanisms, seismicity, and the main categories of rift zones. The manuscript is a dependable reference for readers interested in the East African rifts.

Table of Contents

Contents Foreword Surface Structure and Plate Tectonics of Afar Geological Setting. Structure. Afar Floor. Afar Margins. Crustal Extension In Afar. Afar and Plate Tectonics. Volcanism in the Afar Depression: Its Tectonic and Magmatic Significance Tectonics. Volcanism. Volcanism of Oceanic Nature. Continental Volcanism. Stratoid Volcanism. Granitic Intrusions. Activity. A Preliminary Interpretation of the Gravity Field of Afar, Northeast Ethiopia Compilation of the Bouguer Map. A Quantitative Interpretation of the Bouguer Map. Conclusions. A Gravity Survey of the Central Part of the Ethiopian Rift Valley Data. Interpretation. Correlation with Surface Geology. Models. Conclusion. An Aeromagnetic Survey of the Afar Triangle of Ethiopia (Abstract) Local Earthquake Phases Observed at Addis Ababa, Ethiopia Seismic Profiles in the Djibouti Area Results. Interpretation. Conclusion. Continental Rift Zones: Their Arrangement and Development Main Categories of Rift Zones. Main Types of Continental Rift Zones. Rift Zones of Platforms. Rift Zones of Young Folded Regions. Rifts and Rift-Like Belts. Interrelations Between Geosynchnal-Orogenic Belts and Rift Belts. Pre-Cenozoic Rift Zones and Belts. The Kenya Rift Volcanics: A Note On Volumes and Chemical Composition Distribution and Volumes. Miocene Volcanics. Pliocene Volcanics. Quaternary Volcanics. Chemical Compositions. Basalts. Trachytic Volcanics. Phonohtic Lavas. Summary and Conclusions. A Geochemical Study of Silali Volcano, Kenya, with Special Reference to the Origin of the Intermediate-Acid Eruptives of the Central Rift Valley The Eruptivity of the Central Gregory Rift Valley. Summary of the Geology of Silali. Geochemistry. Discussion. Conclusions. The Seismicity of the East African Rift System Seismicity. The Gulf of Aden. The Red Sea. East Africa. Earthquake Mechanisms. Travel Time Delays. Travel Time Delays and Gravity Anomalies. Study of Microearthqu


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© Elsevier 1972
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About the Editor

R. W. Girdler

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