Integrated gravity, magnetic, seismic, and geologic study of Triassic Riddleville basin, Georgia

Conference · Fri May 01 04:00:00 EDT 1987 · AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States)

OSTI ID:6188236

Fisher, E; Ziegler, D G; Aiken, C L.V.

An integrated approach was taken in assessing the basement configuration of the Riddleville basin, a Triassic rift structure in central Georgia. The basin is within Piedmont metamorphic and igneous rocks and is overlain by a veneer of Cretaceous and younger sediments. Generally, these basins yield poor seismic data, as in this case where much of the seismic energy is absorbed at the Triassic-Cretaceous unconformity and where little velocity contrast exists between the deeper Triassic sediments and basement. The problem is further compounded by large-amplitude gravity and magnetic contrasts caused by intrabasement lithologic changes and by the presence of basic intrusions. Detailed gravity and USGS aeromagnetic surveys were utilized as well as a singular seismic line and several nearby wells of which two penetrate basement. The complications were handily resolved by powerful potential field inverse modeling techniques where gravity and magnetic models verified the seismic interpretation. It is shown that the basin has far more sediment than previously conjectured, and bodies that were considered to be shallow are now found to be intrabasement effects. It is also established that the basin consists of a series of tilted fault blocks, each of which displays contrasting stratigraphic sections seismically where one could infer that the sedimentary architecture of the basin was at least partially controlled by the local tectonic regime.

• Research Organization: SEPCO, Dallas, TX
• OSTI ID: 6188236
• Report Number(s): CONF-870606-
• Conference Information: Journal Name: AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States) Journal Volume: 71:5
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
CRETACEOUS PERIOD
EXPLORATION
FEDERAL REGION IV
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC FAULTS
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
GEOPHYSICAL SURVEYS
GEORGIA
MESOZOIC ERA
MINERAL RESOURCES
NORTH AMERICA
PETROLEUM DEPOSITS
RESOURCES
RIFT ZONES
SEDIMENTARY BASINS
SURVEYS
TRIASSIC PERIOD
USA