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About this book
This book is a collection of 22 selected papers from the homonymous Conference held in September 2003 Milos, Greece. The aim of the conference was to serve as a forum for the presentation and constructive discussion of the state-of-the-art and emerging issues on the South Aegean Volcanic Arc.
In the first part of the book the tectonic- geodynamic setting and the present upper mantle structure of the Aegean area are discussed. It includes an interesting interpretation of data on the spatial distribution of intermediate focal depth earthquakes, fault plane solutions and deep velocity structures, to further investigate active tectonics related to the deep structure of the southern Aegean volcanic arc.
The second part deals with general volcanological, petrological and tectonic characteristics of the SAAVA presenting an extensive review of volcanological, chemical, isotope and tectonic data, using a large amount of new field and laboratory data. Interesting conclusions are presented regarding the present volcanic associations, the volcanic fields location and shape in respect to the large tectonic lineaments and the plate motions, the source of the SAAVA parental magmas.
Presented in the third part is an extensive review on the volcanic hazard assessment and the monitoring state of the SAAVA centers. Seismic and geodetic monitoring of the Santorini volcano and the recent (1995-1998) crisis of Nisyros volcano are presented and discussed.
The last part deals with hydrothermal deposits and processes in the SAAVA, as well as products and processes in adjacent areas with a particular interest and significance that link them to the SAAVA processes.
1. Tertiary and Queternary tectonics in the Aegean area. 2. A model of the Aegean geodynamic zone. 3. Upper mantle structure of the Aegean (Greece) derived from phase velocities of fundamental mode Rayleigh waves. 4. Deep structure and active tectonics of the Southern Aegean volcanic arc. 5. A west-east traverse along the magmatism of the South Aegean volcanic arc in the light of volcanological, chemical and isotope data. 6. The South Aegean active volcanic arc: relationships between magmatism and tectonics. 7. Our bubbling earth. 8. Magmatic evolution processes as recorded in plagioclase phenocrysts of Nea Kameni rocks (Santorini volcano, Greece). 9. Volcanic hazards in the Aegean area, relative risk evaluation and monitoring state of the active volcanic centers. 10. Recent seismic activity (1994-2002) of the Santorini volcano using data from local seismological network. 11. Geodetic evidence for slow, small scale inflation of the Santorini caldera. 12. Long-term prediction of the next eruption in Thera volcano from conditional probability estimates. 13. Late-Holocene coastal uplift in the Nisyros volcano (SE Aegean Sea): Evidence for a probable new phase of slow shallow intrusive activity. 14. Investigating the formation of a superficial fracture on Nisyros Island, Greece with the DC resistivity method. 15. Gravity monitoring of Nisyros volcano activity: 2001-2003 preliminary results. 16. Real time monitoring of gas-geochemical parameters in Nisyros fumaroles. 17. The Vani manganese deposit, Milos island, Greece: A fossil stratabound Mn-Ba-Pb-Zn-As-Sb-W-rich hydrothermal deposit. 18. An FT-Raman, Raman and FTIR study of hydrothermally altered volcanic rocks from Kos Island (Southeastern Aegean, Greece). 19. Rhyolitic dikes of Paros Island, Cyclades. 20. Investigation of non-pristine volcanic structures acting as probable hosts to epithermal gold mineralization in the back arc region of the active Aegean Arc, used combined satellite imagery and field data: examples from Lesvos volcanic terrain. 21. Tertiary high-Mg volcanic rocks from Western Anatolia and their geodynamic significance for the evolution of the Aegean area. 22. A mathematical model for the morphological evolution of a volcano on an island.