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Contact zone permeability at intrusion boundaries: new results from hydraulic testing and geophysical logging in the Newark Rift Basin, New York, USA

Matter, Jürg M., Goldberg, D.S., Morin, R.H. and Stute, M. (2006) Contact zone permeability at intrusion boundaries: new results from hydraulic testing and geophysical logging in the Newark Rift Basin, New York, USA Hydrogeology Journal, 14, (5), pp. 689-699. (doi:10.1007/s10040-005-0456-3).

Record type: Article


Hydraulic tests and geophysical logging performed in the Palisades sill and the underlying sedimentary rocks in the NE part of the Newark Rift Basin, New York, USA, confirm that the particular transmissive zones are localized within the dolerite-sedimentary rock contact zone and within a narrow interval below this contact zone that is characterized by the occurrence of small layers of chilled dolerite. Transmissivity values determined from fluid injection, aquifer testing, and flowmeter measurements generally fall in the range of 8.1E-08 to 9.95E-06 m2/s and correspond to various scales of investigation. The analysis of acoustic and optical BHTV images reveals two primary fracture sets within the dolerite and the sedimentary rocks—subhorizontal fractures, intersected by subvertical ones. Despite being highly fractured either with subhorizontal, subvertical or both fracture populations, the dolerite above and the sedimentary rocks below the contact zone and the zone with the layers of chilled dolerite are significantly less conductive. The distribution of the particular conductive intervals is not a function of the two dominant fracture populations or their density but rather of the intrusion path of the sill. The intrusion caused thermal fracturing and cracking of both formations, resulting in higher permeability along the contact zone.

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Published date: June 2006
Keywords: Fractured rocks, Igneous rocks, Groundwater hydraulics, Hydraulic testing, Geophysical methods
Organisations: Geochemistry


Local EPrints ID: 354716
ISSN: 1431-2174
PURE UUID: 9c61b84d-26a7-4954-8f4f-6faf8087d1c4

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Date deposited: 17 Jul 2013 16:23
Last modified: 18 Jul 2017 03:53

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Author: Jürg M. Matter
Author: D.S. Goldberg
Author: R.H. Morin
Author: M. Stute

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