Geological Survey of Canada, Current Research (Online) no. 2004-C4

Geological Survey of Canada, Current Research (Online) no. 2004-C4 PDF

Author: S. Connell-Madore

Publisher: Natural Resources Canada

Published: 2004

Total Pages: 8

ISBN-13: 0662369203

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The purpose of this paper is to document results of pore size analyses of rocks from the Astarte River Formation, central Baffin Island, for use in interpreting ground electromagnetic surveys that have been conducted in the central Baffin region. Results are presented for pore size distribution analyses of four black graphitic shale samples subjected to mercury injection porosimetry measurements. These measurements are essential for the electrical mechanism analysis of these samples. Porosity values are compared to those typical of mudstone or crystalline rocks.

Geological Survey of Canada, Current Research (Online) no. 2004-C5

Geological Survey of Canada, Current Research (Online) no. 2004-C5 PDF

Author: S. Connell-Madore

Publisher: Natural Resources Canada

Published: 2004

Total Pages: 11

ISBN-13: 0662369793

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Electrical resistivity measurements previously made on graphitic shale samples from the Astarte River Formation on Baffin Island indicate that they display weak to strong anisotropic characteristics, with low and high resistivities in the directions parallel & perpendicular to foliation respectively. The purpose of the study described in this paper is to determine the electrical conductivity mechanisms that resulted in those characteristics. Study methods included electrical resistivity and porosity measurements, graphite thin-section analysis, and scanning electron microscopy. Resistivity-related factors examined in the study include pore-fluid connectivity, the presence of graphite, and the insulating quality of quartz grain layers.

Geological Survey of Canada, Current Research (Online) no. 2004-A1

Geological Survey of Canada, Current Research (Online) no. 2004-A1 PDF

Author: K. A. Simpson

Publisher: Natural Resources Canada

Published: 2004

Total Pages: 10

ISBN-13: 0662357094

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This paper summarizes field characteristics of volcanic & sedimentary facies along a transect within the Hazelton Group rocks in the east Telegraph Creek area of north-west British Columbia. It begins with a brief description of the geological setting, then presents facies descriptions & information on the distribution & associations of the rocks described. The facies are organized into the following mappable units: dacite-andesite breccia; coarse sandstone to conglomerate; felsic volcaniclastic & subordinate breccia & mudstone; interbedded mudstone & sandstone; and basalt.

Geological Survey of Canada, Current Research (Online) no. 2004-F1

Geological Survey of Canada, Current Research (Online) no. 2004-F1 PDF

Author: Nicole M. Rayner

Publisher: Natural Resources Canada

Published: 2004

Total Pages: 16

ISBN-13: 066235835X

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This paper presents results from uranium-lead dating of plutonic, volcanic, & sedimentary rocks from the Southern Indian Lake to Granville Lake area of northern Manitoba. The samples analyzed were collected from a range of tectonostratigraphic settings and provide constraints on the age of volcanism & sedimentation in the Rusty Lake Belt, on the deposition of fluvial to littoral facies sediments in the Partridge Breast Belt, and on the emplacement of orthogneiss and plutonic rocks.