Geochronological potential of a dedicated southern Appalachian deep research drill hole
Conference
·
· Geol. Soc. Am., Abstr. Programs; (United States)
OSTI ID:6611825
A Southern Appalachian Deep Research Drill Hole (SADRDH) would offer a unique opportunity to provide geochronological controls for regional tectonothermal events as well as serve as a natural laboratory for the investigation of a variety of diffusion-controlled, radiometric systems. Considerable uncertainty exists as to the relative extents and crustal levels of translations, and the temporal relations between thrusting and regional metamorphic events. SADRDH would provide unweathered, continuous sections across many of these allochthonous units and the intervening tectonic contacts. If sufficient 3'' core is recovered, collaborative U-Pb (zircon and monazite) and Sm-Nd (whole-rock and mineral) age determinations could be integrated with careful petrologic studies to provide reliable crystallization ages for the various igneous lithologies penetrated. These results together with a coordinated, systematic determination of /sup 40/Ar//sup 39/Ar and fission track mineral ages could provide complete time-temperature profiles of the various allochthonous units and allow for recognition of contrasts across tectonic contacts. Integration of this record with results of fluid-inclusion and oxygen isotopic studies within ductile shear zones could help resolve the times and crustal conditions of thrusting. Geochronological evaluation of the thermal record within these sequences could provide control on the extent and times of basement involvement in the tectonothermal events recorded in the overlying allochthonous units.
- Research Organization:
- Univ. of Georgia, Athens (USA)
- OSTI ID:
- 6611825
- Report Number(s):
- CONF-8510489-
- Conference Information:
- Journal Name: Geol. Soc. Am., Abstr. Programs; (United States) Journal Volume: 17
- Country of Publication:
- United States
- Language:
- English
Similar Records
Geochronology of the Baie Verte Peninsula, Newfoundland: implications for the tectonic evolution of the Humber and Dunnage Zones of the Appalachian Orogen
/sup 40/Ar//sup 39/Ar mineral age record of early Caledonian tectonothermal activity in the Baltoscandian miogeocline, central Scandinavia
Polyorogenic imbrication and metamorphism of northwest portions of the Baltoscandian miogeocline
Journal Article
·
Sat Sep 01 00:00:00 EDT 1984
· J. Geol.; (United States)
·
OSTI ID:6713908
/sup 40/Ar//sup 39/Ar mineral age record of early Caledonian tectonothermal activity in the Baltoscandian miogeocline, central Scandinavia
Journal Article
·
Sat Jun 01 00:00:00 EDT 1985
· Am. J. Sci.; (United States)
·
OSTI ID:6441194
Polyorogenic imbrication and metamorphism of northwest portions of the Baltoscandian miogeocline
Conference
·
Mon Dec 31 23:00:00 EST 1984
· Geol. Soc. Am., Abstr. Programs; (United States)
·
OSTI ID:6594810
Related Subjects
58 GEOSCIENCES
580100 -- Geology & Hydrology-- (-1989)
580300* -- Mineralogy
Petrology
& Rock Mechanics-- (-1989)
AGE ESTIMATION
APPALACHIAN MOUNTAINS
BASEMENT ROCK
BOREHOLES
CAVITIES
CRYSTALLIZATION
DRILL CORES
FEDERAL REGION IV
GEOLOGIC FAULTS
GEOLOGIC FRACTURES
GEOLOGIC HISTORY
GEOLOGIC STRUCTURES
GEOLOGY
IGNEOUS ROCKS
ISOTOPE RATIO
MAPPING
METAMORPHIC ROCKS
MOUNTAINS
NORTH AMERICA
PETROLOGY
PHASE TRANSFORMATIONS
ROCKS
STRATIGRAPHY
TECTONICS
USA
580100 -- Geology & Hydrology-- (-1989)
580300* -- Mineralogy
Petrology
& Rock Mechanics-- (-1989)
AGE ESTIMATION
APPALACHIAN MOUNTAINS
BASEMENT ROCK
BOREHOLES
CAVITIES
CRYSTALLIZATION
DRILL CORES
FEDERAL REGION IV
GEOLOGIC FAULTS
GEOLOGIC FRACTURES
GEOLOGIC HISTORY
GEOLOGIC STRUCTURES
GEOLOGY
IGNEOUS ROCKS
ISOTOPE RATIO
MAPPING
METAMORPHIC ROCKS
MOUNTAINS
NORTH AMERICA
PETROLOGY
PHASE TRANSFORMATIONS
ROCKS
STRATIGRAPHY
TECTONICS
USA