Effects of ancient porosity and permeability on formation of sedimentary dolomites: Devonian Jefferson Formation (Frasnian), south-central Montana
Conference
·
· AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States)
OSTI ID:5696426
Petrographic and geochemical evidence indicates that multiple dolomitization and dolomite stabilization events affected the Devonian Jefferson Formation (Frasnian) in south-central Montana. Several types of dolomite occur, defined by cathodoluminescence: nonzoned, dully luminescent subhedral-anhedral mosaics (most common), euhedral nonzoned and zoned dolomites, zoned dolomite cements, and irregularly luminescent dolomites (dully luminescent with irregularly luminescent regions). The irregularly luminescent fabrics probably represent partial replacement of early dolomite phases with later dolomite phases. Nonzoned, Ca-enriched, euhedral dolomites occur in calcite-cemented, coarse-grained limestone layers. These permeable layers probably were conduits for early meteoric waters, that occluded porosity in the limestones and prevented later dolomite stabilization. Irregularly luminescent dolomites are interpreted as intermediate fabrics in the dolomite stabilization process. Later calcite cements which occlude intercrystalline porosity prevented further dolomite replacement. Total recrystallization of remaining dolomites and formation of final dully luminescent mosaics occurred prior to brecciation and stylolitization.
- Research Organization:
- Washington State Univ., Pullman
- OSTI ID:
- 5696426
- Report Number(s):
- CONF-870915-
- Conference Information:
- Journal Name: AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States) Journal Volume: 71:8
- Country of Publication:
- United States
- Language:
- English
Similar Records
Dolomitization of the Devonian Jefferson Formation, south-central Montana
Stratigraphy, depositional environments, and diagenesis related to porosity development and destruction in Jefferson Formation, northwestern Montana
Sedimentologic and diagenetic controls on reservoir development at Rosevear gas field, Swan Hills Formation (upper Devonian), central Alberta
Journal Article
·
Sat Jul 01 00:00:00 EDT 1989
· Mountain Geologist; (USA)
·
OSTI ID:6904336
Stratigraphy, depositional environments, and diagenesis related to porosity development and destruction in Jefferson Formation, northwestern Montana
Conference
·
Fri Aug 01 00:00:00 EDT 1986
· Am. Assoc. Pet. Geol., Bull.; (United States)
·
OSTI ID:6962832
Sedimentologic and diagenetic controls on reservoir development at Rosevear gas field, Swan Hills Formation (upper Devonian), central Alberta
Conference
·
Sun Jan 31 23:00:00 EST 1988
· AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States)
·
OSTI ID:6085132
Related Subjects
02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
DEVONIAN PERIOD
DOLOMITE
FEDERAL REGION VIII
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC FORMATIONS
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MINERAL RESOURCES
MINERALS
MONTANA
NORTH AMERICA
OXYGEN COMPOUNDS
PALEOZOIC ERA
PERMEABILITY
PETROLEUM DEPOSITS
POROSITY
RESERVOIR ROCK
RESOURCES
USA
020200* -- Petroleum-- Reserves
Geology
& Exploration
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
DEVONIAN PERIOD
DOLOMITE
FEDERAL REGION VIII
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC FORMATIONS
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MINERAL RESOURCES
MINERALS
MONTANA
NORTH AMERICA
OXYGEN COMPOUNDS
PALEOZOIC ERA
PERMEABILITY
PETROLEUM DEPOSITS
POROSITY
RESERVOIR ROCK
RESOURCES
USA