Continental Tectonics

Publisher: National Academies Press
ISBN: 9780309029285
eISBN Pdf: 9780309540483
Place of publication: United States
Year of digital publication: 1980
Month: January
Pages: 211
Language: English

Continental Tectonics
Copyright
Studies in Geophysics
PREFACE
Contents
OVERVIEW AND RECOMMENDATIONS
- THE PLATE-TECTONIC FRAMEWORK
- THE CONTINENTS AND PLATE TECTONICS
- CURRENT CAPABILITIES
- CONTINENTAL TECTONICS IN PROPOSED GEOSCIENCE PROGRAMS
- RECOMMENDATION
- BIBLIOGRAPHY
I SUMMARY
- 1 Plate Tectonics and the Continents: A Review
  - INTRODUCTION
  - PLATE BOUNDARIES
    - Divergent Boundary Systems
    - Transform Boundary Systems
    - Convergent Boundary Systems
    - Noncollisional Convergent Systems
    - Collisional Convergent Boundary Systems
  - NON-PLATE-BOUNDARY SYSTEMS
    - Intraplate Magmatic Activity
    - Intraplate Vertical Movements
    - Intraplate Deformation
  - CONCLUSIONS
  - References
- 2 Problems of Pre-Mesozoic Continental Evolution
  - INTRODUCTION
  - TIME CALIBRATION OF THE TECTONIC RECORD
  - CONTINENTAL TECTONICS FROM THE PRE-ARCHEAN THROUGH THE PALEOZOIC
    - The Interplanetary Connection
    - The Archean Need not be Arcane
    - Proterozoic Perimeters in Space and Time
  - ARE PALEOZOIC PLATES MORE PALATABLE THAN PRECAMBRIAN?
  - Reference
II PLATE-BOUNDARY TECTONICS
- 3 Complexities of Modern and Ancient Subduction Systems
  - INTRODUCTION
  - ACTIVE CONTINENTAL MARGINS
  - BEHAVIOR OF MODERN ISLAND ARCS
  - MECHANISM OF SUBDUCTION
  - PRE-CRETACEOUS ISLAND-ARC AND MÉLANGE ASSEMBLAGES OF THE WESTERN UNITED STATES
  - CRETACEOUS AND CENOZOIC CALIFORNIA
    - Subduction Configuration
    - Late Cenozoic Disruption
  - References
- 4 Intracontinental Rifts and Aulacogens
  - INTRODUCTION
  - RIFTS IN THE WILSON CYCLE
  - RIFTS AT CONTINENTAL BREAKUP
  - CONVERGENT BOUNDARY RIFTS
  - COLLISIONAL RIFTS
    - Aulacogens
    - Impactogens
  - NORTH AMERICAN INTRACONTINENTAL RIFTS AND AULACOGENS
    - Active Rifts
    - Reactivated Rifts
    - Failed Rifts at Atlantic-Type Margins
    - Aulacogens
  - CONCLUSIONS
  - References
- 5 Evolution of Outer Highs on Divergent Continental Margins
  - INTRODUCTION
  - STRUCTURAL-STRATIGRAPHIC RELATIONS AT DIVERGENT CONTINENTAL-OCEANIC CRUSTAL BOUNDARIES
    - Geological Observations
    - Geophysical Evidence for Outer Highs
  - SUMMARY OF EVOLUTION OF DIVERGENT (PASSIVE) CONTINENTAL MARGINS
  - TECTONIC-SEDIMENTARY MODEL FOR THE EVOLUTION OF OUTER HIGHS ON DIVERGENT MARGINS
  - PROBLEMS AND RECOMMENDATIONS
  - SUMMARY
  - ACKNOWLEDGMENTS
  - References
III INTRAPLATE TECTONICS
- 6 Tectonics of Noncollisional Regimes
  - INTRODUCTION
  - SEISMIC EVIDENCE FOR INTRAPLATE COMPRESSION
  - GEOLOGICAL EVIDENCE FOR INTRAPLATE DEFORMATION RELATED TO NONCOLLISIONAL PLATE CONVERGENCE
    - Western Terrane
    - Central or Magmatic-Arc Terrane
    - Eastern Terrane
    - Colorado-Wyoming Rocky Mountain Terrane
  - PROBLEMS
  - References
- 7 Models for Midcontinent Tectonism
  - INTRODUCTION
  - GEOLOGICAL HISTORY
  - CONTEMPORARY GEODYNAMICS
    - Seismicity
    - Stress Distribution
    - Cenozoic Faulting
    - Recent Vertical Movements
  - TECTONIC MODELS
    - Resurgent Tectonics
      - Crustal Rifting
      - Zones of Weakness and Crustal Boundaries
      - Local Basement Inhomogeneities
    - Thermal Expansion and Contraction
    - Isostatic Warping
  - CONCLUSIONS
  - ACKNOWLEDGMENTS
  - References
- 8 Problems of Intraplate Extensional Tectonics, Western United States
  - INTRODUCTION
  - EARLY TERTIARY EXTENSION IN THE PACIFIC NORTHWEST
  - MIOCENE EXTENSION IN THE WESTERN UNITED STATES
    - Dike Swarms, Columbia River Basalt
    - Great Basin Extensional Tectonics
      - Geometry of Range-Front Faults in the Great Basin
      - Amount of Great Basin Extension
      - Relations Between Extension and Strike-Slip Faulting
      - Mechanisms of Crustal Extension at Depth
  - LOW-ANGLE DETACHMENT FAULTS
    - Colorado River Trough South of Lake Mead
  - PLATE-TECTONIC SPECULATIONS ON THE CAUSE(S) OF LATE CENOZOIC EXTENSION IN THE WESTERN UNITED STATES
  - PERSPECTIVES
  - ACKNOWLEDGMENTS
  - References
- 9 Geophysical and Geological Characteristics of the Crust of the Basin and Range Province
  - INTRODUCTION
  - PRESENT AND PAST CRUSTAL EXTENSION
  - THE THERMAL REGIME
  - CRUSTAL MAGMAS
  - HYDROTHERMAL CONVECTION
  - THE DISTRIBUTION OF EARTHQUAKES
  - NORMAL FAULTING AND BASAL SLIDING
  - GEOPHYSICALLY ANOMALOUS LAYERS IN THE SHALLOW CRUST
  - CRUSTAL MODEL FOR THE BASIN AND RANGE PROVINCE: A SUMMARY AND INTERPRETATION
  - ACKNOWLEDGMENTS
  - References
IV CHARACTERIZATION OF CONTINENTAL CRUST
- 10 Seismic Exploration of the Continental Basement: Trends for the 1980's
  - INTRODUCTION
  - SPECTRUM OF SEISMIC WAVELENGTHS
  - NATURAL SEISMIC SOURCES
  - ARTIFICIAL SEISMIC SOURCES
  - CONCLUSION
  - ACKNOWLEDGMENTS
  - References
- 11 Exploration of the Continental Crust Using Aeromagnetic Data
  - INTRODUCTION
  - WESTERN UNITED STATES
  - MIDWESTERN UNITED STATES
  - EASTERN UNITED STATES
  - CONCLUSIONS
  - References
- 12 Chemistry of the Lower Crust: Inferences from Magmas And Xenoliths
  - INTRODUCTION
  - CONCEPTUAL FRAMEWORK
  - CONTINENTAL MAGMATIC STUDIES
  - CONSEQUENCES OF CRUSTAL MELTING: TWO TYPES OF LOWER CRUST
    - Residual Crust
    - Solidified Basic Melts
  - EXPOSED LOWER CRUSTAL SECTIONS
  - XENOLITH STUDIES
    - Xenoliths Associated with Convergent Plate Boundaries
    - Xenoliths Associated with Rift Valley Environments and Intraplate Volcanic Areas
      - Rio Grande Rift
      - Midcontinent Rift
      - Massif Central, France
      - Intraplate Volcanic Areas
    - Xenoliths from Polymetamorphosed Precambrian Lower Crust
      - Southern Africa
      - Colorado Plateau
  - OUTSTANDING QUESTIONS AND FUTURE DIRECTIONS
    - What is the Origin of the Rock Suites at Sites of Continental Crustal Formation?
    - What are the Age Relationships Within Vertical as Well as Horizontal Crustal Sections?
    - What is the Temperature-Strain History of Lower Crustal Regions?
  - SUMMARY AND CONCLUSIONS
  - ACKNOWLEDGMENTS
  - References
- 13 Geochemical Evolution of the Continental Crust
  - INTRODUCTION
  - RADIOGENIC ISOTOPES
  - PETROGENESIS OF IGNEOUS ROCKS
  - CHEMISTRY OF THE LOWER CRUST
  - MANTLE-CRUST INTERACTION
  - ACKNOWLEDGMENTS
  - References
V CONTINENTAL EVOLUTION
- 14 Cenozoic Volcanism in the Western United States: Implications for Continental Tectonics
  - INTRODUCTION
  - SUBVOLCANIC INTRUSIONS
  - COMPOSITIONAL VARIATIONS IN THE CONTINENTAL LITHOSPHERE
  - STRUCTURAL DISCONTINUITIES IN THE CONTINENTAL LITHOSPHERE
  - PLATE-TECTONIC INTERACTIONS
  - PERSPECTIVES
  - References
- 15 The Shape of North America during the Precambrian
  - INTRODUCTION
  - ARCHEAN
  - EARLY PROTEROZOIC
  - LATE PROTEROZOIC
  - SUMMARY
  - References
- 16 An Outline of the Tectonic Characteristics of China
  - INTRODUCTION
  - TECTIONIC UNITS OF CHINA
    - Sino-Korean Paraplatform
    - Yangtze Paraplatform
  - TARIM PLATFORM
    - Tienshan-Khingan Geosynclinal Fold System and Argun Fold System
    - Kunlun-Nanshan-Tsinling Geosynclinal Fold System and Tibet-Yunnan Geosynclinal System
    - Himalayan Geosynclinal Fold System
    - South China Geosynclinal Fold System
    - Natanhata Eugeosynclinal Fold Belt and Upper Heilungkiang Miogeosynclinal Fold Belt
  - DEEP-SEATED STRUCTURES AND DEPTH FRACTURES IN CHINA
    - Deep-Seated Structure
    - Depth Fractures of China
  - THE TECTONIC DEVELOPMENT OF CHINA
  - THE POLYCYCLIC TECTONIC EVOLUTION OF CHINA
  - PRELIMINARY OBSERVATIONS ON PLATE TECTONICS IN CHINA
    - Tsangpo Depth Fracture Zone
    - Nanshan-Tsinling Region
    - Chinshakiang-Red River Depth-Fracture Zone
  - References

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