Relationship between Mesozoic and Cenozoic tectonic features in west central Arizona and adjacent southeastern California
Journal Article
·
· Journal of Geophysical Research; (United States)
- Arizona Geological Survey, Tucson (United States)
The Maria fold-and-thrust belt (MFTB) is a narrow belt of Mesozoic crustal shortening that is characterized by generally south vergent folds and thrusts that commonly displace Proterozoic crystalline rocks over deformed and metamorphosed Paleozoic and Mesozoic strata. The MFTB is cut by a south to southeast trending belt of mid-Tertiary extensional deformation. Extension was characterized by large displacements on low-angle normal faults, known as detachment faults, and by isostatic uplift of mylonitic midcrustal rocks now exposed in metamorphic core complexes. The geometry and style of extensional deformation change along the extensional belt and reveal the influence of the MFTB. Several extensional features are spatially coincident with the root zone of MFTB thrusts: (1) an areally extensive west-northwest trending belt of denuded Tertiary mylonitic fabrics in the Whipple and Harcuvar metamorphic core complexes, (2) a style of extension characterized by minimum extensional dismemberment of the upper plate and maximum denudation and uplift of deep-seated lower plate rocks, (3) an abrupt bend in the belt of arched, uplifted rocks below detachment faults, and (4) an abrupt bend in the trend of the breakaway zone of the detachment faults and an associated lateral ramp in the detachment fault system.
- OSTI ID:
- 5073949
- Journal Information:
- Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 95:B1; ISSN 0148-0227; ISSN JGREA
- Country of Publication:
- United States
- Language:
- English
Similar Records
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Late Cretaceous to early Tertiary ductile deformation: Catalina-Rincon metamorphic core complex, southeastern Arizona
Thesis/Dissertation
·
Thu Aug 01 00:00:00 EDT 1991
·
OSTI ID:138733
Mesozoic contractile and extensional structures in the Boyer Gap area, northern Dome Rock Mountains, Arizona
Conference
·
Wed Mar 31 23:00:00 EST 1993
· Geological Society of America, Abstracts with Programs; (United States)
·
OSTI ID:5437123
Late Cretaceous to early Tertiary ductile deformation: Catalina-Rincon metamorphic core complex, southeastern Arizona
Journal Article
·
Fri May 01 00:00:00 EDT 1987
· Geology; (United States)
·
OSTI ID:5276439
Related Subjects
58 GEOSCIENCES
580000* -- Geosciences
ARIZONA
CALIFORNIA
CENOZOIC ERA
CONTINENTAL CRUST
DEFORMATION
DEVELOPED COUNTRIES
EARTH CRUST
FEDERAL REGION IX
GEOLOGIC AGES
GEOLOGIC FAULTS
GEOLOGIC FORMATIONS
GEOLOGIC FRACTURES
GEOLOGIC HISTORY
GEOLOGIC MODELS
GEOLOGIC STRUCTURES
MECHANICS
MESOZOIC ERA
METAMORPHIC ROCKS
NORTH AMERICA
ROCK MECHANICS
ROCKS
TECTONICS
USA
580000* -- Geosciences
ARIZONA
CALIFORNIA
CENOZOIC ERA
CONTINENTAL CRUST
DEFORMATION
DEVELOPED COUNTRIES
EARTH CRUST
FEDERAL REGION IX
GEOLOGIC AGES
GEOLOGIC FAULTS
GEOLOGIC FORMATIONS
GEOLOGIC FRACTURES
GEOLOGIC HISTORY
GEOLOGIC MODELS
GEOLOGIC STRUCTURES
MECHANICS
MESOZOIC ERA
METAMORPHIC ROCKS
NORTH AMERICA
ROCK MECHANICS
ROCKS
TECTONICS
USA