Island arcs, deep sea trenches, and back-arc basins : proceedings of a symposium held in honor of Maurice Ewing at Arden House, Harriman, N.Y. on March 28-31, 1976

About The Product Published by the American Geophysical Union as part of the Maurice Ewing Series . A three day symposium was held in honor of the late Maurice Ewing at Arden House, Harriman, New York on March 28-31, 1976. The symposium is the first of a planned Maurice Ewing series of symposiums to be held biennially. The American Geophysical Union has agreed to publish the proceedings of the symposiums in a special Maurice Ewing series. This volume represents the first of the series. Content: Title Page......Page 3 Copyright......Page 4 Preface......Page 5 Maurice Ewing......Page 6 Contents......Page 8 Basic Unsolved Problems......Page 10 Features of Trench-are-back ARC Systems As Present Day Manifestations of Pacific-type Orogeny......Page 11 Thermal Regime of T-a-ba Systems......Page 15 Possible Effects of Subduction Rate......Page 16 Possible Origin of Marginal Seas and The Evolution of the Western Paciffic......Page 18 References......Page 21 Pre-cenozoic Tectonics......Page 24 Java Trench Subduction System......Page 26 Banda Arc......Page 30 Complex Arcs of the Northern Indonesian Region......Page 35 Overview......Page 37 References......Page 39 Orogenic Basins......Page 41 Forearc Basins and Subduction Complexes......Page 42 Foreland Basins and Remnant Oceans......Page 44 Retroarc Basins and Fold-Thrust Belts......Page 46 References......Page 47 Introduction......Page 49 Seismic Reflectors in the Vicinity of the Muertos Trench......Page 51 Discussion......Page 56 References......Page 63 Forces......Page 65 Observations......Page 67 References......Page 69 Introduction......Page 71 Talkeetna Arc and Uyak-mchugh Complex: Late Triassic to Late Jurassic......Page 72 Gravina-nutzotin Arc And Baranof-yakutat Complex: Early to Mid Cretaceous......Page 76 Iliamna-mckinley Arc And Shumagin-valdez Complex: Late Cretaceous to Paleocene......Page 77 Summary and Discussion......Page 79 References......Page 81 Results......Page 83 Principal Conclusions......Page 95 Appendix Description of Data Acquisition and Processing System......Page 96 References......Page 100 Introduction......Page 102 Major Segmentation of Subduction Zones: Composite Cross-sections......Page 103 Comparison of Sections: Downwards Bending of the Descending Lithosphere......Page 110 Three-dimensional View: Relationship of Arc Segmentation to Structures in the Converging Plates......Page 113 References......Page 115 Modified Subduction......Page 118 Scarps, Ridges and Deep-Sea Terraces as Indicators of Seismic-tsunamic Source Regions......Page 122 Summary and Conclusions......Page 123 References......Page 124 Introduction......Page 126 Transition Zone Chemistry......Page 127 Inversion Scheme for Computing in Situ Velocities......Page 129 Data......Page 130 Bias......Page 131 Engdahl's Results......Page 133 Fine Structure of Deep Seismic Zones......Page 134 Concluding Remarks......Page 136 References......Page 137 Introduction.......Page 140 The Sea of Japan......Page 142 The Sea of Okhotsk......Page 144 The Bering Sea......Page 145 Philippine Sea......Page 147 South China, Sulu and Celebes Seas......Page 151 Southwestern Pacific......Page 153 Summary......Page 154 Heat Flow Versus Depth......Page 156 The Source of High Heat Below Back-arc Basins......Page 159 References......Page 160 Introduction......Page 165 Summary of Characteristics of Great Earthquakes Along the Circum Pacific Belt......Page 166 Seismic and Aseismic Slip......Page 167 Model of Plate Coupling and Decoupling......Page 170 Discussion and Conclusions......Page 173 References......Page 174 Outward Growth of the Accretionary Prism......Page 177 Vertical Displacements on the Upper Trench Slope......Page 179 Forward Edge of the Upper Trench Slope......Page 180 Conclusions......Page 184 References......Page 186 Laboratory Models and Theory......Page 188 Cascadia Basin Example......Page 190 Possible Effects of Anisotropy......Page 193 The Nongravitational Origin of Trench-Slope Structure......Page 195 References......Page 198 Introduction......Page 200 Trench and Abyssal Plain Sequences--Incidental Relation to Deformed Inner Slope Sedimentary Masses......Page 202 Oceanic Pelagic Deposits--abundant on Oceanic Crust But Uncommon in Pacific Fold Belts......Page 203 Pelagic Deposits in Pacific Fold Belts--age Equivalent With Associated Terrigenous Units......Page 204 Pacific Abyssal Plains--form Only in Special Areas and Commonly Include Abundant Pelagic Beds......Page 205 Pacific Fold Belts--Many not Underlain by Sub-Duction Complexes......Page 206 Overview and Concluding Remarks......Page 207 References......Page 208 Geologic Setting......Page 212 Seismic Reflection Data......Page 214 Discussion and Conclusions......Page 218 References......Page 221 Introduction......Page 223 Plate-motion Constraints......Page 224 Model of Ridge Subduction......Page 225 Tests of the Model......Page 228 References......Page 229 Isotopic and Trace Element Evidence of Sediment And Sea Water Contamination of Aleutian Magma Sources......Page 231 A Melting-mixing Model for the Genesis of Aleutian Basalts......Page 235 Summary and Conclusions......Page 238 References......Page 242 Data......Page 245 Discussion......Page 252 Conclusions......Page 258 References......Page 259 Amchitka Data......Page 261 Amchitka Seismicity......Page 262 Other Amchitka Studies......Page 265 Adak Seismicity......Page 267 Discussion......Page 270 References......Page 272 Local Tectonic Setting......Page 274 Gravity And Bathymetry Data......Page 275 Seismic Profiler Data......Page 276 Structure of the Margin......Page 278 References......Page 284 Introduction......Page 286 Criteria for Recognition of Subduction Processes ......Page 287 Geologic Setting of the Coastal Region and Margin......Page 289 Morphology and Structure of the Peru-Chile Margin......Page 290 Discussion......Page 297 References......Page 300 Regional Geological Setting......Page 303 Metallogeny of the Kyongsang Basin and Adjoining Areas ......Page 304 Metallogenic Comparison with Southwest Japan ......Page 306 Reconstructions of South Korea and Japan ......Page 307 References......Page 309 Petrochemical Characteristics......Page 311 Role of Water in Development of Orogenic Volcanic Series ......Page 312 Petrogenesis - General Considerations......Page 314 Partial Melting of the Mantle Under Hydrous Conditions ......Page 315 Partial Melting of Subducted Oceanic Crust ......Page 319 Petrogenetic Synthesis......Page 320 References......Page 322 Crustal Compositions......Page 325 Archean Sedimentary Rock REE Patterns ......Page 326 Archean Igneous Rocks......Page 327 Summary and Discussion......Page 331 References......Page 334 Data from Indonesia ......Page 336 Data from the Northwest Pacific ......Page 340 References......Page 346 Comments on Cenozoic Explosive Volcanism Related to East and Southeast Asian ARCS......Page 347 References......Page 351 Reply......Page 352 References......Page 353 Introduction......Page 354 Geology of Marginal Basins ......Page 355 Petrologic Data......Page 356 Chemical Comparisons with Ocean Ridge Basalt ......Page 361 Chemical Comparisons with Ophiolites ......Page 362 References......Page 363 Introduction......Page 365 The South Sandwich Arc and the S. Sandwich Spreading Centre ......Page 366 The South Shetlands Island Arc and Bransfield Strait Marginal Basin ......Page 370 Mesozoic Marginal Basin Floor Ophiolites from S. Chile......Page 373 References......Page 374 Some Geological and Geophysical Characteristics of Marginal Basins ......Page 376 Formation and Evolution of Marginal Basins ......Page 380 Laboratory Measurements......Page 381 Numerical Simulation of Induced Convection ......Page 382 Induced Convection Beneath Continental Plateaus......Page 384 Conclusions......Page 387 Appendix......Page 388 References......Page 389 Basin Formation......Page 391 Destruction of the Basin ......Page 394 Discussion......Page 399 References......Page 400 Introduction......Page 402 Stratigraphy and Sediment Provenance ......Page 404 Composition of the Basalts ......Page 406 Structure and Deformation ......Page 407 Reconstruction and Present Day Analogues ......Page 409 Discussion and Conclusions ......Page 410 References......Page 412 Magnetic Anomaly Data......Page 414 Tectonic Fabric......Page 417 Discussion......Page 419 References......Page 421 Magnetic Anomaly Data......Page 423 Proposed Tectonic History......Page 426 Conclusions......Page 429 References......Page 430 Introduction......Page 431 Gravity Data......Page 432 Magnetic Data......Page 433 Heat Flow......Page 435 Discussion......Page 436 Summary and Concluding Remarks ......Page 442 References......Page 443 Academy of Sciences Rise ......Page 445 K-ar Ages of the Dredged Rocks ......Page 446 Physical Properties of Dredged Rocks ......Page 449 Discussion......Page 454 References......Page 456 Development of Sedimentary Basins on the Lower Trench Slope ......Page 457 Abstract......Page 458 Note Added in Proof ......Page 459 Thin Elastic Plate Analysis of Outer Rises ......Page 460 Cenozoic Tectonics of East Asia ......Page 461 About The ProductPublished by the American Geophysical Union as part of the __Maurice Ewing Series__. A three day symposium was held in honor of the late Maurice Ewing at Arden House, Harriman, New York on March 28-31, 1976. The symposium is the first of a planned Maurice Ewing series of symposiums to be held biennially. The American Geophysical Union has agreed to publish the proceedings of the symposiums in a special Maurice Ewing series. This volume represents the first of the series. Content: Some basic problems related to thermo - mechanical aspects of trench -arc systems are discussed. The origin of high heat flow, volcanism and back arc basins, in particular, is considered from two basic models, i.e. the frictional heating model and the secondary mantle flow model. The possible effect of increasing subduction rate within the frictional model is considered also Edited By Manik Talwani And Walter C. Pitman Iii. Proceedings Of A Symposium Held In Honor Of Maurice Ewing At Arden House, Harriman, N.y. On March 28-31, 1976. Proceedings Of The 1st Of A Series Of Meetings; Proceedings Of The 2d Are Entered Under Maurice Ewing Symposium. Includes Bibliographies.