Near-surface neotectonic deformation associated with seismicity in the northeastern United States
- Pennsylvania State Univ., University Park, PA (USA). Dept. of Geosciences
For the Lancaster, PA seismic zone a multifaceted investigation revealed several manifestations of near-surface, neotectonic deformation. Remote sensing data together with surface geological and geophysical observations, and recent seismicity reveal that the neotectonic deformation is concentrated in a NS-trending fault zone some 50 km in length and 10--20 km in width. Anomalies associated with this zone include distinctive lineament and surface erosional patterns; geologically recent uplift evidenced by elevations of stream terraces along the Susquehanna River; and localized contemporary travertine deposits in streams down-drainage from the inferred active fault zone. In the Moodus seismic zone the frequency of tectonically-controlled lineaments was observed to increase in the Moodus quadrangle compared to adjacent areas and dominant lineament directions were observed that are perpendicular and parallel to the orientation of the maximum horizontal stress direction (N80-85E) recently determined from in-situ stress measurements in a 1.5 km-deep borehole in the seismic zone and from well-constrained earthquake focal mechanisms. 284 refs., 33 figs.
- Research Organization:
- US Nuclear Regulatory Commission (NRC), Washington, DC (United States). Div. of Engineering; Pennsylvania State Univ., University Park, PA (USA). Dept. of Geosciences
- Sponsoring Organization:
- USNRC
- OSTI ID:
- 5403615
- Report Number(s):
- NUREG/CR-5418; ON: TI90002677; TRN: 89-030996
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
PENNSYLVANIA
SEISMOLOGY
ROCK MECHANICS
HISTORICAL ASPECTS
ROCKS
DEFORMATION
CALCIUM CARBONATES
GEOLOGIC FAULTS
GEOLOGY
GEOPHYSICS
LINEAMENTS
SEISMIC EVENTS
STRUCTURE FACTORS
TECTONICS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATES
FEDERAL REGION III
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
MECHANICS
NORTH AMERICA
OXYGEN COMPOUNDS
USA
580201* - Geophysics- Seismology & Tectonics- (1980-1989)
054000 - Nuclear Fuels- Health & Safety