Cas / Wright Volcanic Successions Modern and Ancient

A geological approach to processes, products and successions
Erscheinungsjahr 2012
ISBN: 978-94-009-3167-1
Verlag: Springer Netherland
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, 528 Seiten, eBook

One of our aims in the book is to provide geologists with a sound basis for making their own well founded interpretations. For that reason we cover not only concepts about processes, and the nature of the products, but also methods and approaches that may be useful in analysing both modern and ancient successions. Most importantly, we treat the diversity of products in volcanic terrains as facies, and we use the method of facies analysis and interpretation as a means of constructing facies models for different volcanic settings. These models will, we hope, be useful as norms for comparison for workers in ancient terrains.

The idea for this book came into being between 1981 and 1982 when J. V. W. came to Monash University to take up a Monash Postdoctoral Fellowship. During this period a short course on facies analysis in modern and ancient successions was put together, integrating J.V.W.'s extensive volcanological experience in numerous modern volcanic terrains with R.A.F.C.'s extensive sedimentological and volcanological experience in older volcanic and associated sedimentary successions in the Palaeozoic and Precambrian of Australia. The enthusiastic response from the participants to the first short course, taught in May 1982, and to subsequent annual re-runs, encouraged us to develop the short course notes into this book. The idea for both the short course and the book arose because we felt that there was no single source available that comprehensively attempted to address the problems of analysing, interpreting and understanding the complexity of processes, products and stratigraphy in volcanic terrains.

Zielgruppe

Research

Autoren/Hrsg.

Cas, R.

Wright, J.

Inhaltsverzeichnis

One An introduction to facies analysis in volcanic terrains.- Initial statement.- Two Some properties of magmas relevant to their physical behaviour.- Initial statement.- Three Volcaniclastic deposits: fragmentation and general characteristics.- Initial statement.- Four Lava flows.- Initial statement.- Five Three types of pyroclastic deposits and their eruptions: an introduction.- Initial statement.- Six Modern pyroclastic fall deposits and their eruptions.- Initial statement.- Seven Transport and deposition of subaerial pyroclastic flows and surges.- Initial statement.- Eight Ignimbrites and ignimbrite-forming eruptions.- Initial statement.- Nine Subaqueous pyroclastic flows and deep-sea ash layers.- Initial statement.- Ten Epiclastic processes in volcanic terrains.- Initial statement.- Eleven Crystal-rich volcaniclastics - pyroclastic or epiclastic?.- Initial statement.- Twelve Classification of modern and ancient volcaniclastic rocks of pyroclastic and epiclastic origins.- Initial statement.- Thirteen Modern volcanoes and volcanic centres.- Initial statement.- Fourteen Facies models for ancient volcanic successions.- Initial statement.- Fifteen Volcanism and tectonic setting.- Initial statement.- Appendix I. Methods used in studying modern pyroclastic deposits.- I.1 Physical analysis.- I.1.1 Thickness.- I.1.2 Maximum grainsize.- I.1.3 Grainsize distribution.- I.1.4 Proportions of components.- I.1.5 Crystal content of pumice.- I.1.6 Density and porosity.- I.2 Stratigraphic analysis.- Appendix II Grainsize-textural classes of volcaniclastic rocks, some possible origins, and suggested diagnostic characteristics.- References.- Acknowledgements.