Reflection Seismology: The Continental Crust

• Tongue: English
• Leaves: 333
• Category: Library

✦ Synopsis

About The Product

Published by the American Geophysical Union as part of the Geodynamics Series.

That deep seismic reflection profiling has become a "necessary tool" to explore the deep basement of the continental crust is now well established. The question is: Will deep reflection profiling become a "standard tool" that is routinely used on all continents, as is surface geological mapping? This question can be answered in the affirmative. A clear indication of this trend are the results of the "International Symposium on Deep Structure of the Continental Crust: Results from Reflection Seismology", which was held June 26-28, 1984 on the Cornell University campus and which forms the basis for these two Geodynamics Series volumes. This was the first such international meeting, and plans are already under way to hold such a meeting every two years in a different country.

Content:

✦ Table of Contents

Title Page......Page 4
Copyright......Page 5
Contents......Page 6
Preface......Page 9
List of Reviewers
......Page 10
General Geology and Crustal Evolution of the Ivrea and Strona-Ceneri Zones......Page 12
Seismic Reflection Characteristics of the Ivreaand Strona-Ceneri Zones......Page 15
Conclusion......Page 16
References......Page 17
Crustal Structure and Seismic Reflector Geometry......Page 19
References......Page 21
Lithospheric Geometry - Himalayas......Page 23
Lithospheric Geometry - Appalachians......Page 24
A Simplified Model......Page 25
References......Page 29
Introduction......Page 30
Mylonite Zone Reflectivity......Page 31
Tectonic Corme Quences
......Page 34
Conclusions......Page 39
References......Page 40
The Normal State......Page 41
Maqma Underplating......Page 42
Left Over Slabs......Page 43
Continental Thrusts......Page 44
Transcurrent Faults and Local Overthrusting......Page 45
References......Page 46
Origin and Modification of the Continental Crust......Page 48
Tectonic Escape......Page 50
References......Page 58
Introduction......Page 61
References......Page 69
Structure of the Subcrustal Lithosphere from Seismic-Reflection Experiments......Page 72
Conclusions......Page 78
References......Page 80
Introduction......Page 82
Data......Page 87
Relationship of Geophysical Data to Broad Tectonic Elements......Page 88
Conclusions......Page 96
References......Page 97
Granite - Greenstone Terranes......Page 100
Metasedimentary Fold Belts
......Page 103
Granulite and Gneiss Terranes......Page 104
Terrane Boundary Zones......Page 105
Anorogenic Magmatic Terranes
......Page 106
The Deepest Precambrian Crust and Mohos......Page 107
References......Page 108
Geological Characteristics of Ancient Granullte Terranes......Page 112
Discussion and Models......Page 115
Conclusions......Page 120
References......Page 121
Introduction......Page 125
Seismic Record Sections......Page 126
Discussion......Page 129
References......Page 130
Introduction......Page 131
Experimental Results......Page 132
Interpretations......Page 136
References......Page 137
Geology......Page 139
A Mid-Crustal Discontinuity
......Page 141
Discussion......Page 143
References......Page 144
Regional Geology......Page 146
Survey Methods......Page 147
Data Sets......Page 148
Data Analysis and Interpretation
......Page 149
Discussion......Page 155
References......Page 157
2. Data Acquisition and Processing
......Page 159
3. Seismic Character of the Section
......Page 161
4. Architecture of the Seismic Cross Section
......Page 163
5. Geological Evaluation......Page 164
6. Remarks on the LCBL and the Reflection-Moho
......Page 170
8. Discussion......Page 171
References......Page 173
Seismic-Reflection Data
......Page 175
Regional Variations in the Reflections From Moho
......Page 184
Implications for Crustal Structure
......Page 186
References......Page 188
Introduction......Page 190
Regional Data......Page 191
Seismic Reflection Data......Page 196
Preliminary Interpretations of Profiles......Page 197
References......Page 199
Introduction......Page 201
Deep Crustal Reflection Profiles......Page 203
Discussion......Page 206
References......Page 212
Introduction......Page 214
Seismic Refraction Data......Page 216
Potential Data......Page 217
Discussion and Conclusions......Page 218
References......Page 220
The Western Isles - North Channel Profile: ' WINCH '......Page 222
A Moho 'High'......Page 223
Velocity-Density Systematics and Isostasy......Page 225
Application to Example from WINCH......Page 227
Interpretation......Page 228
References......Page 229
Structural History of Western Europ......Page 231
Distribution of Permian and Younger Sediments......Page 232
Geophysical Evidence......Page 235
Hercynian Evolution Model......Page 236
Conclusions......Page 237
References......Page 238
Laramide Uplifts......Page 240
Conclusions......Page 251
References......Page 252
Geology of the Cordilleran Hingezone......Page 254
Summary--The Transition from Cratonic to Orogenic province
......Page 261
References......Page 263
Extraction of Deep Crustal Reflections......Page 265
Dixie Valley......Page 266
Seismic Reflection Profiles......Page 267
Discussion......Page 272
References......Page 274
Background......Page 276
Snake Range Seismic Reflection Profiles......Page 277
Discussion......Page 285
Reference......Page 286
Interpretation and Analysis......Page 288
Initiation of Rifting......Page 296
Mechanism of Rifting......Page 297
Summary......Page 298
Reference......Page 299
Introduction......Page 300
Result......Page 301
References......Page 306
Introduction......Page 308
Offshore Crustal Model......Page 309
Onshore-Offshore Subduction Zone Model......Page 311
Reflection Studies......Page 313
References......Page 316
Introduction......Page 317
Interpretation......Page 318
Discussion......Page 319
Conclusions......Page 322
References......Page 323
Decoupling and Displacement in the Loe thosphere......Page 325
Model and Application......Page 326
Theoretical Considerations......Page 328
Comparison of Theoretical Results with MOIST and WINCH......Page 329
Conclusions......Page 331
References......Page 333