-PDF Download- Geological Survey Of Canada Current Research Online No 2005 A3 EBOOK

Geological Survey of Canada, Current Research (Online) no. 2005-A3

Author: I. Rod Smith

Publisher: Natural Resources Canada

Published: 2005

Total Pages: 10

ISBN-13: 0662410750

This study was conducted in response to concerns raised by local residents about water quality in Fisherman Lake, located 18 kilometres north-west of Fort Liard, Northwest Territories. Field investigation of the lake revealed the existence of 13 gas seeps (largely methane) with distinct bubble trains rising continuously to the surface. This paper presents results of analyses of the gas & of the lake water and the determination, through isotope analyses, of whether the gas is of biogenic origin (related to the decomposition of organic matter) or thermogenic origin (representing a seep from geological strata of the gas field below the lake). The possible effects of methane on the lake water are also discussed and recommendations are made for further research.

Geological Survey of Canada, Current Research (Online) no. 2006-A3

Author: B. R. Edwards

Publisher: Natural Resources Canada

Published: 2006

Total Pages: 14

ISBN-13: 0662428269

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Geological Survey of Canada, Current Research (Online) no. 2005-C3

Author: David Snyder

Publisher: Natural Resources Canada

Published: 2005

Total Pages: 13

ISBN-13: 0662407180

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This paper describes a novel, high-resolution application of cross-borehole seismology at the Snap Lake diamond mine, Northwest Territories, to assess whether the relatively thin kimberlite dyke that hosts the diamonds could be mapped underground with sufficient resolution to accurately estimate its volume and to guide mining. Subsequent mining and mapping with the 50-by-70-metre test panel indicated whether the technique was able to map the top & bottom surfaces of the dyke and to identify ramps, pinch-outs, and cross-cutting fracture planes. The tests also compared the performance of that new technique with two other geophysical methods, high-frequency vibrating seismic surveying and ground penetrating radar.

Geological Survey of Canada, Current Research (Online) no. 2005-D3

Author: D. Calvin Campbell

Publisher: Natural Resources Canada

Published: 2005

Total Pages: 12

ISBN-13: 0662408241

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This study uses newly acquired high-resolution seismic reflection data to present evidence of large-scale mass transport deposits throughout the Quaternary in southern Orphan Basin located off the northern slope of the Grand Banks. Mass transport deposits are those associated with slope failure and transport as slumps, slides, debris avalanches, or debris flows. The results reveal the types of mass transport deposits on the Basin slope & floor and their depositional pattern from the early Pleistocene to the present.