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Geological Survey of Canada, Current Research (Online) no. 2000-A7

Author : Elizabeth S. Carter

Publisher : Natural Resources Canada

Page : 13 pages

File Size : 46,81 MB

Release : 2000

Category :

ISBN : 0660179997

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Book Description

The Upper Triassic sections outcropping on the Queen Charlotte Islands contain outstanding successions of conodont and radiolarian microfossils. This report focuses on the successions about the Carnian-Norian boundary at several key localities. This boundary may coincide with an interval of significant change in global fauna and flora, particularly in terrestrial habitats. The purpose of the study reported is to demonstrate faunal change that may potentially be used in global correlation and definition of the Carnian-Norian boundary, and thus contribute towards the resolution of historical events that date from that time. The report summarizes the radiolarian change within the boundary interval identified primarily by conodonts but supplemented by some molluscan data.





Geological Survey of Canada, Current Research (Online) no. 2000-A10

Author : L. C. Struik

Publisher : Natural Resources Canada

Page : 10 pages

File Size : 24,93 MB

Release : 2000

Category :

ISBN : 0660180022

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Book Description

The final year of the Nechako NATMAP project to study the geology of central British Columbia was used to research information collected in the field & laboratory, and to compile & document the study results. This article includes a review of upcoming publications & other products, by type of product: maps, journal articles, conference presentations, and computer products, as well as ongoing research on petrology, palaeontology, terrane characterization, tectonics & structure, and Quaternary geology.



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

Author : John M. Moore

Publisher : Natural Resources Canada

Page : 8 pages

File Size : 41,99 MB

Release : 2000

Category : Geology

ISBN : 0660180081

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Book Description

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-F6

Author : T. Praamsma

Publisher : Natural Resources Canada

Page : 10 pages

File Size : 16,2 MB

Release : 2000

Category :

ISBN : 0660182327

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Book Description

This study examines aspects of the geological evolution of the Sharbot Lake domain and compares it with that of neighbouring domains & terranes in the Central metasedimentary belt, Grenville Province, Ontario. The study reports uranium-lead zircon & titanite geochronological ages for a granodiorite phase of the Pakenham intrusion from the northern part of the Sharbot Lake domain. The new data expand the known range of magmatism in this part of the belt, elucidate the early tectonic evolution of the domain, and constrain the timing of overprinting metamorphism. Possible links between the Pakenham structure and the Wolf Grove structure to the south-east are also discussed.



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

Author : K. Wetherell

Publisher : Natural Resources Canada

Page : 12 pages

File Size : 38,78 MB

Release : 2005

Category : Geology

ISBN : 0662411226

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Book Description

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.