Thermal maturation of Eagle basin, northwestern Colorado
Conference
·
· Am. Assoc. Pet. Geol., Bull.; (United States)
OSTI ID:5160398
Mean random vitrinite reflectance (R/sub m/) was measured on 120 surface samples from Lower Pennsylvanian through Upper Cretaceous rocks in the Eagle basin for the purpose of mapping thermal maturity. The Eagle basin is a trough that formed during the Pennsylvanian between the ancestral Front Range to the northeast and the ancestral Uncompahgre uplift to the southwest. For comparative purposes, the stratigraphic section in the basin was divided into four intervals, each with a range of R/sub m/ values; 2.70-3.70% for Lower Pennsylvanian rocks, 0.70-2.30 for Middle Pennsylvanian rocks, 0.80-1.50 for Upper Pennsylvanian-Triassic rocks, and 0.60-1.70 for Cretaceous rocks. R/sub m/ values decrease from Lower Pennsylvanian rocks to Cretaceous rocks throughout the basin. Variability in R/sub m/ values within each stratigraphic interval may be due to structural deformation, variations in source material and depositional environment, and spatial and temporal fluctuations in geothermal gradients. R/sub m/ values indicate that most of the Middle Pennsylvanian and Upper Pennsylvanian-Triassic rocks are in the oil window (0.60-1.35%) and gas window (0.75-3.0%). Although R/sub m/ values indicate that Cretaceous rocks are in the oil and gas windows, geochemical data suggest that mainly gas would be generated.
- Research Organization:
- Geological Survey, Denver, CO
- OSTI ID:
- 5160398
- Report Number(s):
- CONF-860624-
- Conference Information:
- Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Journal Volume: 70:5
- Country of Publication:
- United States
- Language:
- English
Similar Records
Paleogeothermal gradients and timing of oil generation in the Belden Formation, Eagle Basin, northwestern Colorado
Estimation of paleogeothermal gradients and their relationship to timing of petroleum generation, Eagle basin, northwestern Colorado
Estimation of paleogeothermal gradients and their relationship to timing of petroleum generation, Eagle basin, northwestern Colorado
Journal Article
·
Sat Dec 31 23:00:00 EST 1988
· Mountain Geologist; (USA)
·
OSTI ID:6992225
Estimation of paleogeothermal gradients and their relationship to timing of petroleum generation, Eagle basin, northwestern Colorado
Conference
·
Thu Dec 31 23:00:00 EST 1987
·
OSTI ID:5992057
Estimation of paleogeothermal gradients and their relationship to timing of petroleum generation, Eagle basin, northwestern Colorado
Conference
·
Sun Jan 31 23:00:00 EST 1988
· AAPG Bull.; (United States)
·
OSTI ID:5797854
Related Subjects
02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
COLORADO
CRETACEOUS PERIOD
FEDERAL REGION VIII
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
MACERALS
MATURATION
MESOZOIC ERA
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NORTH AMERICA
ORIGIN
PALEOZOIC ERA
PENNSYLVANIAN PERIOD
PETROLEUM DEPOSITS
RESOURCES
SEDIMENTARY BASINS
TRIASSIC PERIOD
USA
020200* -- Petroleum-- Reserves
Geology
& Exploration
COLORADO
CRETACEOUS PERIOD
FEDERAL REGION VIII
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
MACERALS
MATURATION
MESOZOIC ERA
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NORTH AMERICA
ORIGIN
PALEOZOIC ERA
PENNSYLVANIAN PERIOD
PETROLEUM DEPOSITS
RESOURCES
SEDIMENTARY BASINS
TRIASSIC PERIOD
USA