Geophysics of the Canary Islands (eBook)

Juan Acosta is the main researcher for the project of which the results are presented in this book.   Peter Clift has done his research and teaching at MIT, WHOI, and is currently affiliated with the University of Aberdeen. He has served and is currently Editor for several journals, amongst others Marine Geophysical Researches.

Table of Contents 4
Foreword 5
Geologic evolution of the Canarian Islands of Lanzarote, Fuerteventura, Gran Canaria and La Gomera and comparison of landslides at these islands with those at Tenerife, La Palma and El Hierro 7
Abstract 7
Introduction 7
Regional setting 8
Methods 12
Recognition of gravity driven facies 14
Collapse of the Canarian Volcanoes 15
Younger Islands 28
Discussion 36
Conclusion 40
Acknowledgements 41
References 41
Salt Diapirs, Salt Brine Seeps, Pockmarks and Surficial Sediment Creep and Slides in the Canary Channel off NW Africa 45
Abstract 45
Introduction 45
Material and methods 46
Morpho-tectonic setting of the Canary Channel Results 47
Discussion 55
Conclusion 59
Acknowledgements 59
References 59
Comparison of volcanic rifts on La Palma and El Hierro, Canary Islands and the Island of Hawaii 62
Abstract 62
Introduction 62
Data 63
Background 63
Canary Islands 74
Hawaiian Islands 81
Discussion 88
Conclusion 89
Acknowledgements 90
References 90
Morphological and structural analysis in the Anaga offshore massif, Canary Islands: fractures and debris avalanches relationships 94
Abstract 94
Introduction 94
Geological setting 95
Methods 96
Anaga offshore proximal region 97
Anaga offshore distal region 107
Structural analysis 110
Conclusions 113
Acknowledgements 114
References 114
Gravity analysis offshore the Canary Islands from a systematic survey 116
Abstract 116
Introduction 116
Geological setting and previous geophysical work 116
Data Collection 118
Data Processing 119
Sea bottom correction 119
Gravity maps 121
Gravity data filtering and transformation 123
Geodynamic discussion of the gravity data 126
Conclusions Acknowledgements 128
References 128
Paleoearthquake evidence in Tenerife (Canary Islands) and possible seismotectonic sources 151
Abstract 151
Introduction and regional seismicity 151
M 152
Geology of the Study Area 153
Description of the liquefaction features 155
Origin of the liquefaction features 157
Estimates of acceleration and magnitude of the paleoearthquake 159
M 160
M 160
M 160
M 160
M 160
M 160
M 161
Conclusions 161
M 161
Acknowledgements 161
References 161
Age and composition of the Amanay Seamount, Canary Islands 163
Abstract 163
Introduction 163
Methods 166
Results 166
Comparison with adjacent volcanic edifices 169
Conclusions Acknowledgements 170
References 170