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Geological Survey of Canada, Current Research (Online) no. 2000-A16

Geological Survey of Canada, Current Research (Online) no. 2000-A16
Author: John M. Moore
Publisher: Natural Resources Canada
Total Pages: 8
Release: 2000
Genre: Geology
ISBN: 0660180081

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The Nicola Horst in the southern intermontane belt, British Columbia, is a Tertiary fault-bounded structure that exposes relatively deep-seated metamorphic equivalents of Late Triassic Nicola Group volcanic & sedimentary rocks, intruded by plutons. Associated with the Nicola facies are undated conglomerate & schist units which are unlike any known facies of the Nicola Group but which resemble units of the pre-Nicola, pericratonic succession to the east. This paper presents preliminary results of field work conducted to better understand the evolution & contact relationships of the Nicola Horst and to examine whether the Horst provides evidence regarding the contact between the Nicola Group and the ancient North American cratonic rocks.


Geological Survey of Canada, Current Research (Online) no. 2000-A5

Geological Survey of Canada, Current Research (Online) no. 2000-A5
Author: Martin De Keijzer
Publisher: Natural Resources Canada
Total Pages: 12
Release: 2000
Genre: Faults (Geology)
ISBN: 0660179970

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A well-exposed section about 250 metres wide below the high water line of the Jennings River, Teslin Lake map area in northern British Columbia shows part of the Teslin Fault and provides an opportunity to constrain the fault's kinematic history by direct ground observations. This report describes preliminary structural observations of this section of the Teslin Fault, including the rock types involved, mylonitic & ultramylonitic structures, and deformation. Indications of two main episodes of shearing are discussed.


Geological Survey of Canada, Current Research (Online) no. 2000-A9

Geological Survey of Canada, Current Research (Online) no. 2000-A9
Author: R. M. Friedman
Publisher: Natural Resources Canada
Total Pages: 9
Release: 2000
Genre: Igneous rocks
ISBN: 0660180014

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Describes uranium-lead dating of zircon and titanite from two representative samples of two plutons (diorite and quartz monzonite) in the Tetachuck Lake map area of central interior British Columbia. Includes information on the geological nature & setting of the sampled plutons, analytical procedures, and geochronology. The correlation of the two plutons with the metallogenically important group of Late Cretaceous Bulkley plutonic suite is discussed.


Geological Survey of Canada, Current Research (Online) no. 2000-C3

Geological Survey of Canada, Current Research (Online) no. 2000-C3
Author: D. E. Kerr
Publisher: Natural Resources Canada
Total Pages: 10
Release: 2000
Genre:
ISBN: 0660180227

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Describes studies conducted as part of a program to provide baseline data of surficial materials, ice-flow history, and soil geochemistry in the Yellowknife area, aimed at augmenting the geoscience database to support mineral exploration & development. After description of the regional setting & bedrock geology of the area, information is presented on surficial sediments (till, glaciofluvial & glaciolacustrine sediments, peat), ice flow patterns, glacial history, and pebble lithology provenance.