Geological Survey of Canada, Current Research (Online) no. 2004-A2

Geological Survey of Canada, Current Research (Online) no. 2004-A2 PDF

Author: P. Van Der Heyden

Publisher: Natural Resources Canada

Published: 2004

Total Pages: 16

ISBN-13: 0662357671

DOWNLOAD EBOOK →

This report details the results of geochronological measurements made on 19 samples from locations in & directly adjacent to the eastern Bella Coola map area of British Columbia. The analytical data were extracted from a large, mostly unpublished data set that includes uranium/lead, potassium/argon, and argon/argon geochronometry for other parts of the Anahim Lake and Mount Waddington map areas. Analytical data, geological ages, and relevant observations for each dated sample are presented in chronological order. The age results provide broad constraints on pluton emplacement, volcanic eruption, and structural & metamorphic relationships in the study area, although these are discussed only in general terms.

Geological Survey of Canada, Current Research (Online) no. 2005-A2

Geological Survey of Canada, Current Research (Online) no. 2005-A2 PDF

Author: K. Wetherell

Publisher: Natural Resources Canada

Published: 2005

Total Pages: 12

ISBN-13: 0662411226

DOWNLOAD EBOOK →

The West Tuya lava field is located about 95 kilometres north-north-west of Dease Lake, British Columbia. This report presents an overview & summary of field work, geographic information system spatial analysis, and preliminary petrographic analysis conducted at the field in 2003-04. Highlights of this work include: identification of three sub-aerial shield volcanoes and their mineral composition; confirmation that mantle-derived peridotite inclusions are present at two of the volcanoes; and interpretation of the sub-aerial lava flows. The minimum and maximum volumes of material erupted are also estimated.

Geological Survey of Canada, Current Research (Online) no. 2000-A2

Geological Survey of Canada, Current Research (Online) no. 2000-A2 PDF

Author: Kazuharu Shimamura

Publisher: Natural Resources Canada

Published: 2000

Total Pages: 8

ISBN-13: 0660179946

DOWNLOAD EBOOK →

The use of static global positioning system (GPS) equipment for accurate horizontal & vertical positioning in field geology operations at high latitudes is made difficult by the need to set up & operate a GPS reference station and limitations on the distance between the reference station & field GPS due to errors introduced by the ionosphere. Dual-frequency GPS receivers have the potential to eliminate these problems since they can eliminate ionospheric errors and thereby increase baseline lengths, thus potentially permitting the use of existing GPS reference stations. This paper describes the use of a dual-frequency receiver for establishing benchmarks along the Yukon River as a field trial of this technology. Field methods and post-processing of the data using GPS data from permanent receiving stations are described, and baseline results are presented. The derived benchmarks will be applied to a survey of fill thickness below the Yukon River.

Lanterna Rally - Theme by Grace Themes