Structural and sedimentational model of the buried Dunbarton Triassic basin, South Carolina and Georgia
Conference
·
OSTI ID:7190176
Seismic reflection surveys and model interpretation of gravity-magnetic surveys indicated that the Dunbarton basin may consist of fault blocks of different thicknesses with displacements of less than 30 m on the top of the Triassic rock and 92-760 m on the bottom. Drilling showed that the apparent displacement on the top was caused by the presence or absence of a reflector in the Coastal Plain sediments that masked the reflection from the top of the Triassic rock. No fault displacement has occurred since the development of the erosional surface on the top of the Triassic rock about 100 million years ago. Drilling information did not confirm or deny the displacement of the bottom of the Triassic basin. Model interpretation of the gravity-magnetic data indicates that the Dunbarton Triassic basin may be wider than previously interpreted, and is in part underlain by a denser basement rock, possibly a pre-Triassic igneous intrusion.
- Research Organization:
- Sandia Labs., Albuquerque, N.Mex. (USA)
- OSTI ID:
- 7190176
- Report Number(s):
- DP-MS-74-39; CONF-760317-2
- Country of Publication:
- United States
- Language:
- English
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