ABSTRACT: Magnetic, Gravity, and Landsat Lineaments in the Appalachian Basin, New York State: Groundtruth, Faults, and Traps
Robert D. Jacobi, Geology, SUNY at Buffalo, Buffalo, NY, Stuart Loewenstein, Quest Energy, Amherst, NY; John Martin, NYSERDA, Albany, NY; and Gerald Smith, Geology, SUNY at Buffalo, Buffalo, NY
Integration of USGS magnetic anomalies, NGDC gravity anomalies, and EARTHSAT Landsat lineaments with seismic, outcrop and well log data allows identification of previously-unrecognized fault systems, as well as extrapolation of known fault systems beyond the confines of groundtruthed areas. Fracture-induced porosity is expected along these faults; several of the proposed fault systems are coincident with hydrocarbon fields.
Seismic and well log data for the Clarendon-Linden Fault System (CLF) indicate motion in Cambrian (Rome Trough), Ordovician (Black River/Trenton), Silurian, and Devonian times. Other lineament sets parallel the CLF to the east and west. Structures in outcrop and seismic occur along these lineaments. Well log data (Rickard, 1973) suggest these faults to the east experienced motion in at least Black River/Trenton time.
East-striking magnetic anomalies in central NYS coincide with the northern 0-line of Silurian salt, suggesting that the northern boundary of the Silurian salt basin was fault-controlled. Some east-northeast trending Landsat lineaments in central NYS are coincident with Black River/Trenton faults that were controlled by older faults associated with the northward extension of the Rome Trough. Some of these lineaments extend into the Mohawk Valley region. In the Mohawk Valley region, faults associated with the Taconic collision can be traced south to the NYS line. These same faults control the disposition of Silurian facies. Faulted sags in Devonian units occur across these lineaments. WNW-striking lineaments in the same region coincide with faulted monoclines at the surface.
Alleghanian thrust ramps and tear faults also are delineated by Landsat lineaments.
Search and Discovery Article #90907©2000 AAPG Eastern Section Meeting, London, Ontario, Canada