Dilation brecciation: proposed mechanism of fracturing, petroleum expulsion, and dolomitization in Monterey formation, California
Conference
·
· Am. Assoc. Pet. Geol., Bull.; (United States)
OSTI ID:5592924
The Monterey formation has been replaced selectively by dolomite and subsequently fractured, brecciated, and relithified with several generations of dolomite cement. The 2 dolomite types are distinctive in morphology, color, stoichiometry, ..delta.. C/sup 13/, ..delta.. O/sup 18/, as well as insoluble and trace element content. Dilation breccias evidently originate in embrittled rocks through a distinctive sequence of steps induced by tectonism: dilatancy, fluid expulsion, natural hydraulic fracturing, brecciation, hydroplastic flow, injection, and dolomite precipitation. Development is most abundant in, but not restricted to, areas of strike-slip faulting. Tectonic stresses cause an initial compression and subsequent dilation (elastic) of rock microcracks and imperfections. With continued stress, the cracks are propagated inelastically and develop into major fracture networks. Fracturing associated with excess pore fluid pressures triggers an instantaneous flow of connate fluids across several hundred feet of newly fractured strata.
- OSTI ID:
- 5592924
- Report Number(s):
- CONF-8105250-
- Conference Information:
- Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Journal Volume: 65:5
- Country of Publication:
- United States
- Language:
- English
Similar Records
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Conference
·
Fri May 01 00:00:00 EDT 1981
· Am. Assoc. Pet. Geol., Bull.; (United States)
·
OSTI ID:5810905
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Conference
·
Mon Feb 28 23:00:00 EST 1983
· Am. Assoc. Pet. Geol., Bull.; (United States)
·
OSTI ID:6184161
Hydrothermal dolomitization and recrystallization of dolomite breccias from the Miocene Monterey Formation, Tepusquet area, California
Journal Article
·
Sun Sep 01 00:00:00 EDT 1996
· Journal of Sedimentary Research, Section A: Sedimentary Petrology and Processes
·
OSTI ID:445632
Related Subjects
02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CALIFORNIA
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
CONNATE WATER
CRACK PROPAGATION
DOLOMITE
FEDERAL REGION IX
FLUIDS
FRACTURE MECHANICS
FRACTURED RESERVOIRS
GEOLOGIC DEPOSITS
GEOLOGIC FRACTURES
GEOLOGIC HISTORY
GEOLOGIC STRUCTURES
GROUND WATER
HYDROGEN COMPOUNDS
INTERSTITIAL WATER
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MECHANICS
MINERAL RESOURCES
MINERALS
NORTH AMERICA
OXYGEN COMPOUNDS
PETROLEUM DEPOSITS
RESERVOIR FLUIDS
RESERVOIR PRESSURE
RESOURCES
TECTONICS
USA
WATER
020200* -- Petroleum-- Reserves
Geology
& Exploration
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CALIFORNIA
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
CONNATE WATER
CRACK PROPAGATION
DOLOMITE
FEDERAL REGION IX
FLUIDS
FRACTURE MECHANICS
FRACTURED RESERVOIRS
GEOLOGIC DEPOSITS
GEOLOGIC FRACTURES
GEOLOGIC HISTORY
GEOLOGIC STRUCTURES
GROUND WATER
HYDROGEN COMPOUNDS
INTERSTITIAL WATER
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MECHANICS
MINERAL RESOURCES
MINERALS
NORTH AMERICA
OXYGEN COMPOUNDS
PETROLEUM DEPOSITS
RESERVOIR FLUIDS
RESERVOIR PRESSURE
RESOURCES
TECTONICS
USA
WATER