Geofile 2008-11 presents for the
first
time in digital form the geology and mineral deposit potential of the
Terrace area of northwestern British Columbia. It provides an easy-to-use
introduction to the geology and exploration potential of the area. This
release presents results of the ongoing Terrace Geological Mapping and
Mineral Assessment Project which is now in its third year with publication
of three 1:50,000 geological maps. This data release gives direct access to the
digital files and geoscience data generated during the project.
For more details about this
project see references below.
Available
Datasets
The GIS
compatible data files on this CD represent a major part of the ouput of the
4 year, ongoing Terrace Geological Mapping and Mineral Assessment Project.
The shape (.shp) files can be downloaded and incorporated into standard GIS
software packages, including ESRI’s free
Arc Explorer.
A Manifold GIS
Map file that contains all of the layers used to build the Terrace map is
above. We also welcome user comments to make this style of
product more useful.
Also included
are KML (.kml/.kmz) files for use in Google Earth – simply open GE then drag
and drop the files from their folder into it. The following KML layers were
generated for the project area: new rock geochemical
analyses from the project, MINFILE and groups of mineral occurrences such as
porphyry Mo associated with Eocene plutons; selected project photographs,
and a new geological compilation that integrates 2005-2007 project mapping.
Finally, the
Terrace Service Directory offers an introduction to services of
use to explorationists in the area.
Notes on using the .kml files
Note that there
are 2 separate files presenting assay data. They both present the same data
set, which includes all of the analyses in 2006 through 2008 publications.
They differ in the “look” of the data. The file Terrace assays with
symbols.kml shows symbols of varying size corresponding to
concentrations of a given element, with different symbols/colours
corresponding to the four key elements copper, gold, silver and molybdenum.
Double clicking on an individual symbol will display the sample number and
complete analysis. In the file Terrace photos and assays.kml,
clicking on the “Au, Ag, Cu, Pb, Zn” in the left-hand menu and then double
clicking on an individual sample will display assay results for these
elements. If a single element is chosen in the left hand menu, tilt Google
Earth to a slanted perspective, and the element will appear as a scaled
column relative to its value. In this file, click “Turn off layers” in the
left hand column under Geochemistry in order to view the photographs more
clearly.
References:
Nelson, J.L.,
Barresi, T., Knight, E. and Boudreau, N. (2006a): Geology and mineral
potential of the Usk map area (103I/09) near Terrace, British Columbia;
B.C. Ministry of Energy, Mines and Petroleum Resources,
Geological
Fieldwork 2005, Paper 2006-1, pages 117-134.
Nelson, J.L.,
Barresi, T., Knight, E. and Boudreau, N. (2006b): Geology of the Usk map
area (193I/09); B.C. Ministry of Energy, Mines and Petroleum Resources
Open-File 2006-3, 1:50,000 scale.
Nelson, J.L. and Kennedy,
R. (2007a): Terrace regional mapping project Year 2: New geological insights
and exploration targets (NTS 103I/16S, 10W), west-central British Columbia;
BC Ministry of Energy, Mines and Petroleum ResourcesGeological Fieldwork 2006, Paper 2007-1, pages 149-162.
Nelson, J.L., Kennedy,
R., J. Angen and S. Newman (2007b): Geology of the Terrace Map Area (103I
9,10,15,16), British Columbia; BC Ministry of
Energy, Mines and Petroleum Resources
Open-File 2007-4, 1:70,000.
Nelson, J.L., Kyba, J.,
McKeown, M. and Angen, J., in preparation: Geology of the Chist Creek map
area (103I/08);
B.C. Ministry of Energy, Mines and Petroleum Resources
Open-File 2008-3, 1:50,000.
Nelson, J.L.,
Kyba, J., McKeown, M. and Angen, J. (2008, this volume): Terrace Regional
Mapping Project Year 3: Contributions to Stratigraphic, Structural and
Exploration Concepts Zymoetz River to Kitimat River, 103I/08; BC Ministry
of Energy, Mines and Petroleum Resources,
Geological Fieldwork 2007,
Paper 2008-1, pages 159-174.
McKeown, M., Nelson, J.L.
and Friedman, R.(2008): Newly discovered VHMS potential within Paleozoic
volcanics of the Stikine assemblage, Terrace area, northwestern B.C.;
B.C. Ministry of Energy, Mines and Petroleum Resources,
Geological
Fieldwork 2007, Paper 2008-1.
Hooper, D.G.
(1984): Geological report on the Gazelle claim, record number 4229; B.C.
Ministry of Energy, Mines and Petroleum Resources,
Assessment Report
12717, 41 pages.
Hooper, D.G.
(1985): Gazelle claim geological report; B.C. Ministry of Energy, Mines
and Petroleum Resources,
Assessment Report 14076, 25 pages.
Contacts and
Notes:
All
publications of the BC Geological Survey are available free on the website
http://www.em.gov.bc.ca/Mining/Geolsurv/Publications/default.htm
This data
release project is a partnership between BC Geological Survey and TEDA
(Terrace Economic Development Authority).
See
2008 Terrace Business Directory for Natural Resources.
For more
information on this release contact:
JoAnne Nelson:
joanne.nelson@gov.bc.ca,
phone: 250-952-0438
_____________________
The Ministry is
in the process of website redesign and upgrade, so links may be changing. If
you have any difficulties accessing the Terrace geodata release, please
contact:
Pat Desjardins:
Pat.Desjardins@gov.bc.ca,
phone: 250-952-0425
All publications of the BC Geological Survey are available
for purchase through Crown Publications Inc. (and its agents).
For questions or more information on geology and minerals
in British Columbia please contact GSB Mailbox
or use the toll free number
(B.C. residents only).
