Friday, August 22, 2008

Another China-like Wedge Subduction Zone?



Indian Point NPP's, 24 mi N of NYC, sits astride the previously unidentified intersection of two Active Seismic Zones.

Study: Massive Earthquake Could Hit NYC - News Story - WNBC | New York

Exerpt from recent GEO-JARGON:




Magnetic, Gravity, and Landsat Lineaments in the
Appalachian Basin, New York State: Groundtruth, Faults,
and Traps
JACOBI, ROBERT D., Geology, SUNY at Buffalo, Buffalo, NY,
LOEWENSTEIN, STUART, Quest Energy, Amherst, NY; MARTIN,
JOHN, NYSERDA, Albany, NY; and SMITH, GERALD, 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 previouslyunrecognized 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.

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