Page 6 - Caldera Volcanism Analysis, Modelling and Response

CONTENTS

Contributors xi
Preface xv
1. Residence Times of Silicic Magmas Associated with Calderas 1
Fidel Costa
1. Introduction 2
2. Methods for Obtaining Time Constraints of Magmatic Processes 5
3. Residence Times of Magmas Associated with Selected Calderas 11
4. Interpretation of Residence Times and Integration with Thermal
and Mechanical Constrains 35
5. Summary and Conclusions 45
Acknowledgments 47
References 47
2. Sedimentology, Depositional Mechanisms and Pulsating Behaviour
of Pyroclastic Density Currents 57
Roberto Sulpizio and Pierfrancesco Dellino
1. Introduction: What are Pyroclastic Density Currents? 58
2. Key Concepts 60
3. Sedimentology: Main Particle Support and Segregation Mechanisms in PDCs 63
4. Depositional Processes in PDCs 70
5. Field Evidences of Stepwise Aggradation in Pulsating PDCs 84
6. Conclusive Remarks and Future Perspectives 87
Acknowledgements 90
References 90
3. The Use of Lithic Clast Distributions in Pyroclastic Deposits to
Understand Pre- and Syn-Caldera Collapse Processes: A Case Study
of the Abrigo Ignimbrite, Tenerife, Canary Islands 97
A. Pittari, R.A.F. Cas, J.A. Wolff, H.J. Nichols, P.B. Larson and J. Martı ´
1. Introduction 98
2. Review of Lithic Component Studies and Inferred Caldera Processes 99
3. Case Study of the Abrigo Ignimbrite 106
4. Conclusions 135
Acknowledgements 136
References 136

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