The Rocky Mountain Region: An Evolving Lithosphere Tectonics, Geochemistry, and Geophysics

Introduction to: The Rocky Mountain Region--AnEvolving Lithosphere: Tectonics, Geochemistry, andGeophysics......Page 9
REFERENCES......Page 13
INTRODUCTION......Page 14
LARAMIDE CRUSTAL AND MANTLE GEOMETRIES......Page 16
RESTORABLE CROSS-SECTIONAL MODELS FOR LARAMIDE DEFORMATION......Page 18
DISCUSSION AND CONCLUSIONS......Page 23
REFERENCES......Page 25
INTRODUCTION......Page 28
BACKGROUND......Page 30
GEOMETRIC AND KINEMATIC ANALYSIS OF THE BLACK CANYON REGION......Page 34
THE BLACK CANYON AND DUBOIS SUCCESSION CONTACT......Page 36
U-PB GEOCHRONOLOGY......Page 37
REGIONAL IMPORTANCE OF NW-TRENDING FABRICS IN SOUTHWESTERN COLORADO......Page 38
PLATE TECTONIC MODEL FOR CRUSTAL ASSEMBLY......Page 41
TECTONIC OVERVIEW......Page 43
REFERENCES......Page 44
INTRODUCTION......Page 46
UTILITY OF AEROMAGNETIC DATA FOR MAPPING PRECAMBRIAN GEOLOGY......Page 49
IMPLICATIONS FOR REGIONAL PRECAMBRIAN GEOLOGY......Page 54
DISCUSSION AND CONCLUSIONS......Page 58
REFERENCES......Page 59
INTRODUCTION......Page 62
2. DEFINITION OF THE APATITE PARTIAL ANNEALING ZONE......Page 63
3. GEOLOGIC SETTING......Page 64
4. METHODS......Page 68
5. RESULTS AND INTERPRETATION......Page 69
6. SUMMARY......Page 74
REFERENCES......Page 76
1. INTRODUCTION......Page 78
2. AN INTRACONTINENTAL ZONE OF DEFORMATION FROM THE PROTEROZOIC TO THE PHANEROZOIC......Page 79
3. THE COLORADO MINERAL BELT SHEAR ZONE SYSTEM......Page 80
4. DISCUSSION......Page 90
5. CONCLUSIONS......Page 94
REFERENCES......Page 95
1. INTRODUCTION......Page 98
2. BACKGROUND......Page 99
3. METHODOLOGY......Page 100
4. RESULTS......Page 101
REFERENCES......Page 103
1. INTRODUCTION......Page 105
2. METHODS......Page 106
4. FITTING A MODEL TO THE OBSERVED ANOMALIES......Page 107
5. RESULTS OF FORWARD MODELING......Page 109
6. DISCUSSION......Page 111
REFERENCES......Page 112
Paleomagnetic and Geochronologic Data Bearing on theTiming, Evolution, and Structure of the Cripple Creek Diatreme Complex and Related Rocks, Front Range,Colorado......Page 113
GEOLOGIC SETTING......Page 114
DISTRICT GEOLOGY......Page 116
PALEOMAGNETTC DATA......Page 117
GEOCHRONOLOGIC DATA......Page 119
DISCUSSION......Page 121
REFERENCES......Page 127
INTRODUCTION......Page 130
THERMAL MODEL......Page 131
CONTROLS ON LITHOSPHERIC THERMAL EVOLUTION......Page 134
APPLICATION TO THE PROTEROZOIC 1.8-1.0 GAOROGENIC BELT OF THE SOUTHWESTERN UNITED STATES......Page 136
SUMMARY......Page 141
REFERENCES......Page 142
INTRODUCTION......Page 144
PREVIOUS WORK......Page 145
SAMPLES/ANALYTICAL PROCEDURES......Page 146
RESULTS......Page 147
DISCUSSION......Page 157
APPENDIX......Page 165
REFERENCES......Page 166
4 0 ~ r / 3 T9h~ernn ochronologic Record of 1.45-1.3 5 GaIntracontinental Tectonism in the Southern RockyMountains: Interplay of Conductive and Advective Heatingwith Intracontinental Deformation......Page 168
METHODS AND ASSUMPTIONS......Page 169
Park Range......Page 171
Northern Front Range......Page 173
Colorado Mineral Belt: Sawatch Range, Gore Range, and Central Front Range......Page 174
Southern Colorado: Unaweep Canyon, Black Canyon,Gunnison Valley, Needle Mountains, Northern Sangre deCristo Range, and Wet Mountains......Page 175
Northern New Mexico: Tusas and Taos Ranges......Page 176
EVIDENCE FOR A REGIONAL THERMAL EPISODEAT -1.4 GA......Page 178
Central Wyoming, Western North Dakota, and SouthwesternMontan......Page 179
Southern Wyoming Archean Margin-Cheyenne Belt......Page 181
DISCUSSION......Page 182
CONCLUSIONS......Page 185
REFERENCES......Page 186
1. INTRODUCTION......Page 190
2. BACKGROUND......Page 191
3. METHODS......Page 192
4. RESULTS......Page 193
5. DISCUSSION......Page 200
6. CONCLUSIONS......Page 202
REFERENCES......Page 203
1. INTRODUCTION......Page 205
2. THE REFRACTION WIDE-ANGLE REFLECTION PROFILING TECHNIQUE......Page 207
3. THE SEISMIC REFLECTION TECHNIQUE......Page 210
4. RESOLUTION......Page 214
5. PREVIOUS SEISMIC REFRACTlON PROFILES......Page 215
7. DISCUSSION......Page 217
REFERENCES......Page 218
INTRODUCTION......Page 221
THE RESULTS OF PREVIOUS GEOPHYSICAL STUDIES......Page 223
SEISMIC REFLECTIVITY OF THE PROTEROZOIC GREEN MOUNTAIN BLOCK......Page 224
DISCUSSIONS AND CONCLUSIONS......Page 227
REFERENCES......Page 229
1. INTRODUCTION......Page 231
3. THE JEMEZ LINEAMENT......Page 232
4. CD-ROM YAVAPAI-MAZATZAL TRANSITION- ZONE PROFILE......Page 233
5. DISCUSSION......Page 239
6. CONCLUSIONS......Page 240
REFERENCES......Page 241
1. INTRODUCTION......Page 243
2. GEOLOGIC SETTING......Page 245
3. SEISMIC DATA AND INTERPRETATION......Page 247
4. RESTORATION OF LARAMIDE STRUCTURES......Page 252
5. DISCUSSION AND CONCLUSIONS......Page 253
REFERENCES......Page 254
An Integrated Geophysical Study of the Southeastern Sangre de Cristo Mountains, New Mexico: Summary......Page 256
An Integrated Geophysical Analysis of the Great Divide Basin and Adjacent Uplifts, Southwestern Wyoming:Summary......Page 258
1. INTRODUCTION......Page 260
2. ANALYSIS......Page 263
3. P-WAVE VELOCITY MODEL......Page 265
4. DISCUSSION......Page 269
REFERENCES......Page 271
Regional Crustal Structure Derived from the CD-ROM 99 Seismic Refraction/Wide-Angle Reflection Profile:The Lower Crust and Upper Mantle......Page 273
3. DATA CHARACTERISTICS......Page 274
4. VELOCITY MODELING......Page 276
6. INTEGRATION WITH GRAVITY DATA......Page 282
7. DISCUSSION......Page 288
8. CONCLUSIONS......Page 290
REFERENCES......Page 291
INTRODUCTION......Page 294
PREVIOUS SEISMIC STUDIES......Page 295
TRAVELTIME INVERSION......Page 297
DISCUSSION OF THE MODELS......Page 299
INTERPRETATION......Page 301
DISCUSSION......Page 306
REFERENCES......Page 308
2. PASSIVE SOURCE EXPERIMENTS IN THE ROCKIES......Page 310
3. RECEIVER FUNCTIONS......Page 311
4. TOMOGRAPHY: P, S, AND SURFACE WAVES......Page 313
6. MANTLE ANISOTROPY......Page 314
REFERENCES......Page 315
1. INTRODUCTION......Page 317
2. METHOD......Page 318
3. RESULTS......Page 325
4. DISCUSSION......Page 326
REFERENCES......Page 327
1. INTRODUCTION......Page 329
3. TELESEISMIC TRAVEL-TIME PROCESSING......Page 330
4. TOMOGRAPHIC INVERSION......Page 332
5. DISCUSSION......Page 337
6. CONCLUSION......Page 342
REFERENCE......Page 343
INTRODUCTION......Page 346
REFERENCES......Page 358
1. INTRODUCTION......Page 360
2. δt* MEASUREMENT......Page 362
3. δQ-' INVERSION......Page 364
4. THE PHYSICAL STATE OF THE UPPER MANTLE......Page 366
REFERENCES......Page 374
1. INTRODUCTION......Page 377
2. INTERSTATION PN STUDY......Page 378
3. DISCUSSION......Page 380
REFERENCES......Page 381
INTRODUCTION......Page 383
PHASE VELOCITY......Page 385
SHEAR-WAVE STRUCTURE IN THE CRUSTAND UPPER MANTLE......Page 388
AZIMUHTAL ANISOTROPY......Page 394
REFERENCES......Page 398
1. INTRODUCTTON......Page 400
2. NATURE OF THE CRUST-MANTLE BOUNDARY......Page 401
4. THE PRESENT CRUST-MANTLE INTERFACE IN THE SOUTHERN ROCKY MOUNTAINS......Page 403
5. GEOLOGIC EVOLUTION OF THE CRUST-MANTLE BOUNDARY IN THE SOUTHERN ROCKY MOUNTAIN REGION......Page 405
7. DISCUSSION AND CONCLUSIONS A SCENARIO OF CRUSTAL MODIFICATION......Page 412
REFERENCES......Page 414
Synthesis of Results From the CD-ROM Experiment: 4-DImage of the Lithosphere Beneath the Rocky Mountains and Implications for Understanding the Evolution of Continental Lithosphere......Page 418
GEOLOGIC AND SEISMIC EVIDENCE FOR PROTEROZOIC SUBDUCTION SCARS......Page 419
ORIGIN OF THE MANTLE VELOCITY GRADIENTS,ANISOTROPY, THICKNESS OF THE LITHOSPHERE......Page 425
LOWER CRUSTAL RESPONSE: UNDERPLATING ANDA DYNAMIC MOHO......Page 429
REACTIVATION AND DIFFERENTIAL UPLIFT OF PROTEROZOIC LITHOSPHERE......Page 430
LARAMIDE TECTONICS......Page 431
DISCUSSION OF PROCESSES OF STABILIZATION AND EVOLUTION OF CONTINENTAL LITHOSPHERE......Page 433
SUMMARY......Page 434
REFERENCES CITED......Page 435