New releases from the British Columbia Geological Survey
Lett, R.E., 2018. Compilation of geochemical data between Lillooet and French Bar Creek, south-central British Columbia. Ministry of Energy, Mines and Petroleum Resources, British Columbia Geological Survey GeoFile 2018-4, 42 p.
Lett, R.E., 2018. Regional moss mat-sediment geochemical survey in the Porcher Island, Grenville Channel, and Dundas Island area, central British Columbia coast. Ministry of Energy, Mines and Petroleum Resources, British Columbia Geological Survey GeoFile 2018-5, 32p.
Information Circular 2018-3
Saanich Inlet, southern Vancouver Island, geology of an Aspiring Global Geopark
April 6, 2018
The British Columbia Geological Survey Branch is searching for a full-time Senior Minerals Geologist (Base Metal Metallogeny)
Ministry: Energy, Mines and Petroleum Resources
Branch: BC Geological Survey, Mines and Mineral Resources Division
Job Type: Regular Full Time
Category: Scientific and Technical; Licensed Science Officer (LS04)
Posting close date: 11 pm Pacific Time, April 26 2018
The Senior Minerals Geologist (Base Metal Metallogeny) provides the Province with expertise on the geology of sediment hosted, strataform and stratabound Pb, Zn, Au and Ag deposits in British Columbia. The position is responsible for conducting individual field surveys for regional bedrock mapping, interpreting regional geology, investigating mineral deposits and evaluating the mineral potential. This position identifies target project areas, collects and interprets data to identify high mineral potential areas and metallotects, identifies new investment targets for the private sector, provides the geological maps that support many aspects of societal planning and generates or catalyzes broader scale breakthroughs and geoscientific innovations that benefit all British Columbians. The Senior Minerals Geologist position is a lead on developing geoscientific innovation through field- and laboratory-based studies that advances knowledge of the Province’s base metal endowment. Contribution to the broader geoscience community is an expectation and may entail the review of journal manuscripts, external publication, participation in professional organizations, and delivering scientific lectures.
Job Profile_LSO GEO 4_Senior Minerals Geologist (Base Metal Metallogeny)
To be considered for this position, your application must clearly demonstrate how you meet the education and experience as outlined below:
• Graduation from a university with a post-graduate degree in geology, geological engineering or equivalent qualifications (preferably a Ph.D.).
• Registered or eligible for immediate registration as a fully qualified Professional Geoscientist with Engineers & Geoscientists British Columbia.
• Minimum of five years relevant professional experience in mineral exploration, mining geology or public sector geoscience (e.g. government).
Experience with, and knowledge of:
• geology and economic geology, especially base metal metallogeny and related deposit-types;
• geology and mineral potential, especially base metal deposits of the Canadian Cordillera;
• sedimentology and stratigraphy especially related to VMS, MVT, and SEDEX deposits;
• field techniques and leading field projects in remote and rugged terrain for extended periods of time;
• research procedures and modern analytical techniques applicable to the position and relevant mineral exploration;
• publishing geoscientific data in peer-reviewed and government literature;
• presenting geoscientific results to technical and non-technical audiences.
For specific position-related enquiries, please contact Adrian.Hickin@gov.bc.ca
Applications must be sent directly to the BC Public Service Agency. Please do not send your application to this email address or reply to this email.
The full job posting, and instructions on how to apply for the position are available on the BC Public Service Agency website:
April 6, 2018
The British Columbia Geological Survey will be offering two field trips following the Resources for Future Generations meeting in June.
Please register before April 15
Friday, June 22 to Sunday, June 24
Upper Fir carbonatite-hosted Nb-Ta deposit in the Blue River area, east-central British Columbia
Sponsored by the Mineralogical Association of Canada
Leaders: Alexei S. Rukhlov (British Columbia Geological Survey) and Thomas C. Chudy (Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia)
Cost: $1160. Includes transportation, accommodation, meals, and guidebook.
Widespread Late Paleozoic carbonatites in the Canadian Cordillera are unusual. In contrast to most carbonatites, which are restricted to intracratonic regions, they were emplaced in a more active setting, along the western margin of Laurentia. The Upper Fir carbonatite complex (330 Ma) hosts one of the largest Nb-Ta deposits in the Cordillera, with unusual, Ta-rich pyrochlore associated with ferrocolumbite, other Nb minerals, and locally coarse molybdenite.
Participants will examine drill-core sections and outcrops of metacarbonatites, related metasomatic rocks, syntectonic pegmatites, enclosing (semi)pelites and amphibolites of the Mica Creek assemblage (750-550 Ma) and Mesozoic-Cenozoic structures related to the Cordilleran orogeny. We will consider the tectono-metamorphic overprinting of igneous features in the Upper Fir carbonatites, as recorded by paragenetic relationships, mineral chemistry, recrystallization and retrograde mylonitization.
Stops along the route from Vancouver to Blue River will offer participants the opportunity to observe key outcrops representing several Cordilleran terranes. A helicopter will ferry participants from the North Thompson valley to the deposit. Participants should be prepared for inclement weather and to walk about 2 km on rugged trails and excavated sites.
For more information please contact
Alexei Rukhlov (British Columbia Geological Survey)
Thursday, June 21 to Sunday, June 24
The Tulameen Alaskan-type ultramafic-mafic intrusion: Architecture, emplacement mechanisms and Cr-PGE vs Cu-PGE 'Reef-style' mineralization in a convergent margin setting
Sponsored by the Mineralogical Association of Canada
Leaders: Graham Nixon and Dejan Milidragovic (British Columbia Geological Survey)
Cost: $800. Includes transportation and accommodation. Registration covers dinners on Thursday and Saturday; participants will buy dinner on Friday and their own lunches at a supermarket stop on the way to the field.
The Tulameen ultramafic-mafic complex is a classically zoned Alaskan-type intrusion emplaced in a Late Triassic supra-subduction zone setting. Field trip participants will examine the lithological zoning and temporal evolution of the complex. We consider the contrast between well-documented chromitite-PGE mineralization in the dunite core and derivative placers and newly discovered Cu-PGE sulphide mineralization in the more differentiated ultramafic rocks. Highlights include 'magmatic avalanche' deposits exposed in the Tulameen River bed, and a 700m zone of Cu-PGE mineralization similar to occurrences documented from layered intrusions in extensional tectonic settings.
Leaving directly after the conference on Thursday June 21, we will be based in Princeton for three nights. We will return to Vancouver by noon on Sunday June 24. Transport in the field will use four-wheel drive vehicles, and participants should bring rain gear and boots with ankle support. Limited financial support may be available for students.
This trip complements Special Session MIN 38: Advances in the study of platinum group-elements and ultramafic rocks.
For more information please contact
Graham Nixon (British Columbia Geological Survey)
February 15, 2018
Open File 2018-2
Nixon, G.T., 2018. Geology of the Tulameen Alaskan-type ultramafic-mafic intrusion, British Columbia. British Columbia Ministry of Energy, Mines and Petroleum Resources, British Columbia Geological Survey Open File 2018-1, scale 1:20,000.
Rukhlov, A.S., Mao, M., Spence, J., Creaser, R.A., Czech, E., and Gabites, J., 2018. Mineral chemistry and isotopic systematics of carbonatites and related rocks from the Blue River area. British Columbia Ministry of Energy, Mines and Petroleum Resources, British Columbia Geological Survey GeoFile 2018-1 (poster).
Nixon, G.T., Manor, M.J., and Scoates, J.S., 2018. Cu-PGE sulphide mineralization in the Tulameen Alaskan-type intrusion: Analogue for Cu-PGE reefs in layered intrusions? British Columbia Ministry of Energy, Mines and Petroleum Resources, British Columbia Geological Survey GeoFile 2018-2 (poster).
Mihalynuk, M.G., Friedman, R.M., Joyce, N., Camacho, A., and Zagorevski, A., 2018. Geochronologic data from samples collected in the Turtle Lake area, NTS 104M/16, northwest British Columbia. British Columbia Ministry of Energy, Mines and Petroleum Resources, British Columbia Geological Survey GeoFile 2018-3.
January 18, 2018
Released in December 2017, the Cordilleran indicator minerals volume will be at the Mineral Exploration Roundup Conference (2018).
Ferbey, T., Plouffe, A., and Hickin, A.S. (Editors) 2017. Indicator minerals in till and stream sediments of the Canadian Cordillera. Geological Association of Canada Special Paper Volume 50, and Mineralogical Association of Canada Topics in Mineral Sciences Volume 47, 243 p.
This volume stems from a workshop given in 2016 at the annual Geological Association of Canada Mineralogical Association of Canada meeting in Whitehorse, Yukon. The workshop was led by the British Columbia Geological Survey, with support from the Yukon Geological Survey and the Geological Survey of Canada. Published jointly by the Geological Association of Canada and the Mineralogical Association of Canada, the volume fills a notable knowledge gap on the use of indicator minerals in the Canadian Cordillera.
The volume will be on display at the Ministry of Energy, Mines and Petroleum Resources Booth, West Exhibit Hall. It is available for purchase from the Geological Association of Canada or the Mineralogical Association of Canada.
Hickin, A.S., Ward, B.C., Plouffe, A., and Nelson, J., 2017. Introduction to the geology, physiography, and glacial history of the Canadian Cordillera in British Columbia and Yukon, pp. 1-25.
Hickin, A.S., and Plouffe, A., 2017. Sampling and interpreting stream, lake, and glacial sediments for mineral exploration in the Canadian Cordillera, a review, pp. 27-51.
Lett, R., and Rukhlov, A.S., 2017. A review of analytical methods for regional geochemical survey (RGS) programs in the Canadian Cordillera, pp. 53-108.
Lian, O.B., and Hickin, A.S., 2017. Origin and character of till and other diamictons and their applicability to mineral prospecting, pp. 109-127.
Plouffe, A., and Ferbey, T., 2017. Porphyry Cu indicator minerals in till: A method to discover buried mineralization, pp. 129-159.
Canil, D., Pisiak, L., Lacourse, T., Plouffe, A., Ferbey, T., and Grondahl, C., 2017. Magnetite as an indicator mineral in porphyry Cu±Au±Mo deposits of British Columbia, Canada, pp. 161-174.
Simandl, G.J., Mackay, D.A.R., Ma, X., Luck, P., Gravel, J., and Akam, C., 2017. The direct indicator mineral concept and QEMSCAN® applied to exploration for carbonatite and carbonatite-related ore deposits, pp. 175-190.
Mao, M., Rukhlov, A.S., Rowins, S.M., Hickin, A.S., Ferbey, T., Bustard, A., Spence, J., and Coogan, L.A., 2017. A novel approach using detrital apatite and till geochemistry to identify covered mineralization in the TREK area of the Nechako Plateau, British Columbia, pp. 191-243.
January 17, 2018
At 9:00 am, Monday January 22, the British Columbia Geological Survey will release four annual publications.
Click images to go to webpages. Please note: the links will not function until the specified hour of release.
Geological Fieldwork 2017: A Summary of Field Activities and Current Research
British Columbia Geological Survey Paper 2018-1
Provincial Overview of Exploration and Mining in British Columbia 2017
British Columbia Geological Survey Information Circular 2018-1
British Columbia Coal Industry Overview, 2017
British Columbia Geological Survey Information Circular 2018-2
Operating mines and selected exploration projects in British Columbia, 2017
British Columbia Geological Survey Open File 2018-1
Clarke, G., Northcote, B., Katay, F., and DeGrace, J.R.
January 16, 2018
Association for Mineral Exploration Roundup 2018
British Columbia Geological Survey geoscientists will be presenting the results of ongoing programs at the annual Mineral Exploration Roundup Conference (2018) sponsored by the Association for Mineral Exploration (AME) at the Vancouver Convention Centre West, January 22-25, 2018.
Ministry of Energy, Mines, and Petroleum Resources Booth
West Exhibit Hall
Monday January 22 - Thursday January 25: 9:00 AM - 4:00 PM (Monday - Wednesday); 9:00 AM - 2:30 PM (Thursday)
Please visit the Ministry of Energy, Mines, and Petroleum Resources booth to discuss mineral exploration with representatives from the British Columbia Geological Survey; Mineral Titles Office; Health, Safety and Permitting Branch; and the Major Mine Permitting Office. Copies of the Survey’s latest publications, including Geological Fieldwork 2017 and the Provincial Overview of Mining and Exploration 2017 will be distributed.
New Geoscience Session: Expanding Exploration Space
West Ballroom B
Monday January 22; 1:30 PM - 4:35 PM
This session considers projects that are helping to expand exploration across the northern Cordillera. Topics will cover deposit to regional scales, presenting research on established and nascent deposits while examining new exploration environments.
1:35 PM – Maurice Colpron (Yukon Geological Survey) - Regional stratigraphic and tectonic setting of base metal occurrences in Yukon
1:55 PM – David Moynihan (Yukon Geological Survey) - Geological setting of gold-bearing vein occurrences in eastern Yukon
2:15 PM – Nicolas Pinet (Geological Survey of Canada) - Carlin-type gold in the eastern Rackla belt of north-central Yukon: geological setting, controls on ore style and geometry, and open questions
2:35 PM – Coffee Break
2:55 PM – Gayle Febbo (Exploration Petrology Inc.) - Tectonic controls and structural modification of porphyry and epithermal systems: examples from KSM, Red Mountain and Big Bulk, northwest British Columbia
3:15 PM – Robert Lee (Mineral Deposit Research Unit - UBC) - Development of an integrated 3D model and distal expression of the Highland Valley Copper System, south-central British Columbia
3:35 PM – Dejan Milidragovic (British Columbia Geological Survey) - Nickel: a Cordilleran perspective
3:55 PM – Alexei Rukhlov (British Columbia Geological Survey) - Tiny yet powerful - apatite for exploration
4:15 PM – Colin Dunn / David Heberlein (Colin Dunn Consulting/Heberlein Consulting) - Sweat, sap and emanations – what trees and snow can reveal about hidden mineralization and processes
Passport to Explore Session: Innovation in Canadian Public Geoscience
West Exhibit Hall - Innovation Stage
Tuesday January 23; 9:30 AM – 11:05 AM
This session features brief presentations by geoscientists from Canadian geological surveys and research agencies highlighting innovations that are available to the exploration community.
9:30 AM – Gabe Fortin (British Columbia Geological Survey) - MapPlace 2: Online tools for exploration
9:45 AM – Brett Elliot (Yukon Geological Survey) - Maps, Apps, and Publications: Tools to discover geoscience information in Yukon
10:00 AM – Nathan Hayward (Geological Survey of Canada) - Landscape antiquity and modeling of ancient drainage reversals of southern Yukon
10:15 AM – Gilles Bellefleur (Geological Survey of Canada) - Imaging Host Rocks and Alteration of Porphyry Deposits with Distributed Acoustic Sensing: Preliminary Results from the New Afton Mine, BC
10:30 AM – Alain Plouffe (Geological Survey of Canada) - Markers of porphyry Cu mineralization: unfolding the story locked in minerals
10:45 AM – Bruce Madu / Todd Ballantyne (Geoscience BC / in3D Geoscience Inc.) - Sparking discovery and innovation opportunities: new Search Phase 3 geophysical data release
West Ballroom Foyer
Monday, January 22 – Thursday, January 25; 9:00 AM – 4:00 PM (Monday – Wednesday); 9:00 AM – 2:30 PM (Thursday)
The Poster Session will display more than 80 posters highlighting research by the British Columbia Geological Survey, Yukon Geological Survey, Geological Survey of Canada, Geoscience BC, geoscientists from universities and industry. Posters will be on display for all four days of Roundup, and will include the results from geological mapping, geophysical and geochemical surveys, and research about the origins of deposits in the Cordillera, other parts of Canada, and the rest of the world. Authors will be on hand during the Poster Session Reception on Tuesday January 23, from 1:30-4:00 PM.
Cui, Y., Zhao, S., Fortin, G., Meredith-Jones, S., and Jones, L. D. MapPlace 2 geospatial web services: New features and applications
Cui, Y., Miller, D., Schiarizza, P., and Diakow, L.J. Integrated digital geology of British Columbia
Han T. and Rukhlov, A. S. Regional Geochemical Survey (RGS) data update and release using the newly developed RGS database
Diakow, L. J., Mihalynuk, M. G., Friedman, R. M., Logan, J. M., and Camacho, A. New geochronologic constraints on Nicola Group volcano-stratigraphy and Cu-Au-Ag porphyry mineralization
Mihalynuk, M. G., Zagorevski, A., Milidragovic, D., Tsekhmistrenko, M., Friedman, R.M., Joyce, N., Camacho, A., and Golding M. GEM contributions to new constraints on Stikinia – Cache Creek terrane geology near the BC – Yukon border
Nelson, J. and van Straaten, B. I. New insights into the Hazelton Group in the Golden Triangle
Nixon, G. T., Manor, M. J., and Scoates, J. S. Cu-PGE sulphide mineralization in the Tulameen Alaskan-type intrusion: analogue for Cu-PGE reefs in layered intrusions?
Ootes, L., Castonguay, S., Friedman, R. M., Devine, F., and Simmonds R. Testing the relationship between the Llewellyn fault, Tally-Ho shear zone, and gold-mineralizing systems in northwest British Columbia
Riddell, J. Comparison of the effectiveness of coal ash chemistry indices for predicting CSR (coke strength after reaction with CO2) using data from BC COALFILE
Rukhlov, A. S., Kieffer, B., Creaser, R.A., Mao, M, Gabites, J., Spence, J., and Czech, E. Mineral chemistry, isotopic systematics, and petrogenesis of the Blue River carbonatites, east-central British Columbia
Schiarizza, P. Geology of the Nicola Group in the Spanish Lake area
Simandl, G. J., Akam, C., Yakimoski, M., Richardson, D., Teucher, A., Paradis, S., McPhail, S., Hayes, M., Stefik, R., and Ferri, F. Potential recovery of Ca, K, Mg, Br, I, B, and Li from formation and flowback waters, NE British Columbia, Canada
Simandl, G. J., Petrus, J., Leybourne, M., Paradis, M., and Akam, C. Mount Brussilof fersmite - its importance in constraining the timing of magnesite and MVT mineralization, sparry dolomitization, and Nb- REE hydrothermal events in SE British Columbia, Canada.
van Straaten, B. I. and Bouzari, F. The Middle Jurassic Tanzilla-McBride hydrothermal system: one of the largest lithocaps in BC
van Straaten, B. I. and Bichlmaier, S. A new syncollisional Middle Jurassic volcanic and metallogenic episode along the northeastern margin of Stikinia
After more than 30 years with the BCGS, JoAnne Nelson, Senior Project Geologist and Northwestern British Columbia Manager, retired at the close of 2017. JoAnne’s insightful scientific contributions and commitment to public service have made her a role model and leader in Cordilleran geoscience. JoAnne has influenced several generations of Cordilleran geologists and has published in national and international journals on topics that have strongly shaped our current understanding of Cordilleran tectonics. In addition to her research excellence, JoAnne has remained extremely active and enthusiastic member of the BCGS, organizing conferences, special sessions, and fieldtrips. JoAnne’s accomplishments were formally recognized in 2013 when she was listed in the top ‘100 Global Inspirational Women in Mining’ by the United Kingdom’s Standard Bank. In 2015, she was awarded the ‘Gold Pick’ award by the Kamloops Exploration Group (KEG) in recognition of “outstanding services and contributions to the minerals industry”. In 2017, she was given a ‘Special tribute’ by the Association of Mineral Exploration (AME) at the 2017 Mineral Exploration Roundup conference in recognition of her distinguished career in geoscience focused on the tectonics and metallogeny of the Northern Cordillera. JoAnne’s decades of outstanding work in Canadian Earth science was recognized with the 2017 Provincial and Territorial Geologists Medal. JoAnne remains active and will continue to contribute the Cordilleran Geology as an Emeritus Geoscientist with the Survey.
JoAnne will be speaking at the Kamloops Exploration Group lecture series in Kamloops on February 15, 2018 and in Logan Lake on February 16, 2018, presenting ‘The Road North’, a look back on a long, adventuresome field career in British Columbia’s northwest wilderness: the landscape, the stories, and the people most of all.
As part of the CPTG lecture tour, JoAnne will be speaking about British Columbia’s “Golden Triangle” in Whitehorse, Yukon at the Cordilleran Tectonics Workshop, March 2-4, 2018.
December 11, 2017
BCGS Open Files 2017-2 to 2017-7
(also released as Geoscience BC Maps 2017-02-01 to 2017-02-06)
D. Sacco, H. Arnold, T. Ferbey, and W. Jackaman
Because of extensive drift cover, large parts of the southern Interior Plateau that are underlain by prospective rocks of the Stikine and Quesnel terranes remain underexplored. Nonetheless, buried bedrock mineralization may be defined by examining the geochemistry and mineralogy of glacial sediments. With a relatively simple transport and depositional history, basal tills are particularly well suited for this type of exploration.
Till geochemical and mineralogical surveys are a central component of a Geoscience BC's Targeting Resources for Exploration and Knowledge (TREK) project, initiated in 2013 to better understand the geology and metallogeny of the southern Interior Plateau. Released as joint British Columbia Geological Survey and Geoscience BC publications, these basal till potential maps were completed for the planning and implementation phases of TREK. By identifying areas where basal till is most likely to occur, the maps are intended to help design exploration projects, and guide surficial sediment geochemistry and mineralogy sampling programs.
Sacco, D., Arnold, H., Ferbey, T., and Jackaman, W., 2017. Basal till potential of the Anahim Lake map area (NTS 093C/06), British Columbia. British Columbia Geological Survey Open File 2017-02, Geoscience BC Map 2017-02-01, 1:50,000 scale.
Sacco, D., Arnold, H., Ferbey, T., and Jackaman, W., 2017. Basal till potential of the Satah Mountain map area (NTS 093C/07), British Columbia. British Columbia Geological Survey Open File 2017-03, Geoscience BC Map 2017-02-02, 1:50,000 scale.
Sacco, D., Arnold, H., Ferbey, T., and Jackaman, W., 2017. Basal till potential of the Downton Creek map area (NTS 093C/10), British Columbia. British Columbia Geological Survey Open File 2017-04, Geoscience BC Map 2017-02-03, 1:50,000 scale. http://www.empr.gov.bc.ca/Mining/Geoscience/PublicationsCatalogue/OpenFiles/2017/Pages/2017-4.aspx
Sacco, D., Arnold, H., Ferbey, T., and Jackaman, W., 2017. Basal till potential of the Christensen Creek map area (NTS 093C/11), British Columbia. British Columbia Geological Survey Open File 2017-05, Geoscience BC Map 2017-02-04, 1:50,000 scale.
Sacco, D., Arnold, H., Ferbey, T., and Jackaman, W., 2017. Basal till potential of the Carnlick Creek map area (NTS 093C/14), British Columbia. British Columbia Geological Survey Open File 2017-06, Geoscience BC Map 2017-02-05, 1:50,000 scale.
Sacco, D., Arnold, H., Ferbey, T., and Jackaman, W., 2017. Basal till potential of the Kushya River map area (NTS 093C/15), British Columbia. British Columbia Geological Survey Open File 2017-07, Geoscience BC Map 2017-02-06, 1:50,000 scale.
September 14, 2017
British Columbia Geological Survey Geoscience Maps 2017-2 and 2017-4
Also published as Geological Survey of Canada Open Files 8287, 8288, 8290, and 8291
O. Boulanger and F. Kiss
Geoscience Map 2017-2
Boulanger, O., and Kiss, F., 2017. Aeromagnetic survey of the Llewellyn area, NTS 104-M/8 and parts of 104-M/1,2,6,7, British Columbia, residual total magnetic field. British Columbia Geological Survey Geoscience Map 2017-2, sheet 1 of 2, 1:100,000 scale and digital data. Also published as Geological Survey of Canada, Open File 8287. https://doi.org/10.4095/305322
Boulanger, O., and Kiss, F., 2017. Aeromagnetic survey of the Llewellyn area, NTS 104-M/8 and parts of 104-M/1,2,6,7, British Columbia, first vertical derivative of the magnetic field. British Columbia Geological Survey Geoscience Map 2017-2, sheet 2 of 2, 1:100,000 scale and digital data. Also published as Geological Survey of Canada, Open File, 8290. https://doi.org/10.4095/305325
Geoscience Map 2017-4
Boulanger, O., and Kiss, F., 2017. Aeromagnetic survey of the Llewellyn area, NTS 104-M/9,10,15,16 and parts of 104-M/11,14, British Columbia, residual total magnetic field. British Columbia Geological Survey Geoscience Map 2017-4, sheet 1 of 2, 1:100,000 scale and digital data. Also published as Geological Survey of Canada, Open File 8288. https://doi.org/10.4095/305323
Boulanger, O., and Kiss, F., 2017. Aeromagnetic survey of the Llewellyn area, NTS 104-M/9,10,15,16 and parts of 104-M/11,14, British Columbia, first vertical derivative of the magnetic field. British Columbia Geological Survey Geoscience Map 2017-4, sheet 2 of 2, 1:100,000 scale and digital data. Also published as Geological Survey of Canada, Open File 8291. https://doi.org/10.4095/305326
Data coverage extends from northwestern British Columbia into Yukon as Geological Survey of Canada Open File 8289 and Yukon Geological Survey Open File 2017-61.
August 23, 2017
British Columbia Geological Survey GeoFile 2017-11
Regional Geochemical Survey (RGS) data update and release using the newly developed RGS database
T. Han and A.S. Rukhlov
This GeoFile is a release of the most current and complete province-wide geochemical data set collected under the Regional Geochemical Survey (RGS) program. This data set was generated by integrating RGS data previously published by the British Geological Survey and Geoscience BC. It was compiled from 111 original sources with 64,828 samples and about 5 million determinations analyzed using 18 methods in 18 laboratories. For the ease of use and consistency with previously published data, the data set is in a flat tabular format. Behind the scenes is the newly developed RGS database that operates through a semi-automated process for data compilation, quality control, upload, and product generation. This RGS database provides a solution for consistent, standardized, and long-term data storage and for timely data update and regular data release. The RGS data set is just one of many potential data products that can be generated from the RGS database.
August 23, 2017
British Columbia Geological Survey GeoFile 2017-9
Compiled till geochemical data for British Columbia
A.L. Bustard, T. Han, and T. Ferbey
The complete data set of publically available, regional-scale, till geochemical surveys carried out in British Columbia by the British Columbia Geological Survey, the Geological Survey of Canada, and Geoscience BC compiles 39 reports released between 1992 and 2017, and includes geochemical data for 10,454 samples. Five Microsoft Excel tables generated from this database provide analytical determinations for the clay (<2 µm) and silt plus clay (<63 µm) size fractions of tills by inductively coupled plasma mass spectrometry after an aqua regia or modified aqua regia digestion, after a lithium metaborate fusion, and by instrumental neutron activation. These data tables can be brought into GIS software and integrated with other geoscience data to generate new exploration targets and design follow-up exploration programs.
June 29, 2017
British Columbia Geological Survey GeoFile 2017-10
Ash chemistry database for British Columbia Rocky Mountain bituminous coals
Janet Riddell and Tian Han
Ash is the inorganic residue remaining after coal combusts. It is composed of oxides of the mineral content in the coal. Coal ash chemistry can have a significant influence on coke strength after reaction (CSR), an important measure of coking coal quality. Coals that were overlain by non-marine deposits (which includes most Canadian Rocky Mountain coals) generally have mineral assemblages that form ashes with low ratios of reactive oxides (i.e. Fe2O3, CaO, MgO, Na2O and K2O) to refractory oxides (i.e. SiO2, Al2O3 and TiO2), which favours good coke strength under blast furnace conditions. Coal ash chemistry is also used to predict slagging and fouling potential in the furnaces or kilns of all types of coals. This database compiles ash chemistry analyses of British Columbia Rocky Mountain bituminous coals from public sources into a standardized relational format to facilitate its distribution and use.
June 29, 2017
British Columbia Geological Survey Geoscience Map 2017-1
Geology and geochronology of the Turnagain ultramafic-mafic intrusion
G. T. Nixon, J. E. Scheel, R. M. Friedman, C. J. Wall, J. Gabites, D. Miller and J. S. Scoates
The Turnagain Alaskan-type intrusion in northern British Columbia belongs to a global class of ultramafic-mafic intrusions emplaced at convergent margin tectonic settings that are gaining prominence as exploration targets for magmatic Ni-Cu-PGE sulphide mineralization. The Turnagain body is unusually enriched in Ni(-Co) sulphides compared to typical Alaskan-type intrusions. In terms of contained Ni metal, the low-grade mineralization at Turnagain ranks ninth among the world’s largest deposits, constituting a total resource of 1842 Mt @ 0.21 wt % Ni and 0.013 wt % Co.
Geoscience Map 2017-1 provides a compilation of the geology (1:10,000 scale), incorporating historical and modern exploration work, and geochronological results (U-Pb, 40Ar/39Ar) for the intrusion and its host rocks. A series of transverse and longitudinal sections controlled in part by drillhole information are used to construct a conceptual 3-D model of the intrusion. Field observations and geochronology establish a multi-stage history of emplacement in the Early Jurassic, with four distinct intrusive phases spanning at least 3 million years (~188-185 Ma). The geochronological results indicate two separate episodes of sulphide mineralization hosted by different intrusive phases: an early event that produced the main Ni(-Co) resource; and a younger event that gave rise to significant Cu(-PGE) mineralization, a potential future resource. From regional geological studies and geophysical surveys, we infer that deformation of the Turnagain intrusion was during accretion of an outboard arc assemblage (Quesnellia/Yukon-Tanana terranes) onto miogeoclinal strata of the ancient North American margin. The geochronological data bracket this accretionary event to after ca. 185 Ma (mid-Early Jurassic) and before ca. 171 Ma (early Middle Jurassic).
June 29, 2017
British Columbia Geological Survey Open File 2017-9
Preliminary bedrock geology of the Tanzilla and McBride area
B.I. van Straaten, R. Gibson, and J. Nelson
The Tanzilla – McBride map area encompasses about 1023 square kilometers immediately east-southeast of the community of Dease Lake in northwestern British Columbia. The geology is based largely on fieldwork conducted in 2015 and 2016. The map area covers a previously poorly understood volcanic succession that we assign to the Horn Mountain Formation, recently defined as a late Early to Middle Jurassic volcanic succession (about 5.4 km thick) in the upper part of the Hazelton Group.
The oldest units in the area are mafic volcanic rocks of the Stuhini Group (Triassic) that are cut by the Cake Hill pluton (Late Triassic). Separated by a regional unconformity, these units are overlain by the Spatsizi Formation (Hazelton Group, late Pliensbachian to Toarcian), a sedimentary succession up to 1 km thick. The Spatsizi Formation grades laterally and vertically to the Horn Mountain Formation. Units in the lower part of the Horn Mountain Formation include massive green augite-plagioclase-phyric volcanic breccia and rare grey coarse platy plagioclase-phyric lapilli tuff and pillows that were, at least in part, deposited in a subaqueous environment. Overlying units of interlayered maroon augite-plagioclase-phyric flows, volcanic breccia and tuff suggest increasingly greater volumes of volcanism and the formation of a subaerial volcanic edifice. During a hiatus in volcanism, these rocks were cut and hydrothermally altered by a 173 Ma (Aalenian) porphyry. These units are overlain by Bajocian mafic volcanic flows in the upper part of the Horn Mountain Formation. The Horn Mountain Formation is cut by the Three Sisters pluton (ca 173-169 Ma, Aalenian-Bajocian), and is unconformably overlain by sedimentary rocks of the Bowser Lake Group (Bajocian). In the northern part of the map area, folded Takwahoni Formation siliciclastic rocks deposited in the Whitehorse trough (Laberge Group, Pliensbachian to Toarcian(?)) are in the hanging wall of the south-verging Kehlechoa thrust fault, and structurally overlie the Horn Mountain volcanic succession. The Snowdrift Creek pluton (Late Jurassic) cuts the Kehlechoa fault. The Takwahoni Formation is structurally overlain by undifferentiated limestone, siliciclastic, volcanic and ultramafic rocks of the Cache Creek terrane in the hanging wall of the King Salmon thrust fault.
At least three magmatic-hydrothermal events are recognized in the map area. Late Triassic porphyry-style copper mineralization occurs at the Gnat Pass developed prospect and nearby Moss showing. The Horn Mountain Formation hosts aerially extensive gossans at Tanzilla and McBride (both early-stage porphyry projects) interpreted as Middle Jurassic in age. At Tanzilla, an advanced argillic lithocap overlies porphyry-style alteration at depth. Quartz-sericite-pyrite to potassic alteration with anomalous copper and molybdenum is hosted by a syn-mineral 173 Ma plagioclase porphyry. Our mapping extends the advanced argillic alteration at Tanzilla for at least 17 km along strike. It is interpreted as a lithocap formed by acidic hydrothermal fluid flow along an unconformity or fault in the upper Horn Mountain Formation. At the McBride showing, widespread quartz-sericite-pyrite and local potassic alteration hosts elevated copper and gold in volcanic rocks of the middle Horn Mountain Formation. Molybdenum mineralization is locally in the Snowdrift Creek pluton (Late Jurassic) and its immediate wall rocks, and in a satellite stock to the south.
March 3, 2017
Geological Survey at the 2017 Prospectors and Developers Association of Canada Meeting (PDAC), March 5-8.
Please join British Columbia Ministry of Energy and Mines Minister Bill Bennett, Deputy Minister Elaine McKnight, Assistant Deputy Minister Peter Robb, and staff of the British Columbia Geological Survey at the Prospectors and Developers Association of Canada (PDAC) convention, at the Metro Toronto Convention Centre.
Tuesday March 7, from 3:00 to 4:00 pm, British Columbia Ministry of Energy and Mines Booth (631, South Trade Floor)
The Minister and Survey staff will be available to discuss exploration and mining opportunities. Refreshments provided by the Association for Mineral Exploration (AME).
Ernst & Young LLP will be releasing the British Columbia Mineral and Coal Exploration Survey 2016, produced in collaboration with the Ministry of Energy and Mines and the Association for Mineral Exploration.
Sunday, March 5: 10:00 - 5:00
Monday, March 6: 10:00 - 5:00
Tuesday, March 7: 10:00 - 5:00
Wednesday, March 8: 9:00 - 12:00
Visit our booth to talk with Survey staff, pick up copies of our latest publications, and see the new MapPlace 2 in action.
February 8, 2017
The following posters, which were presented at the annual Mineral Exploration Roundup Conference (2017), are now available for download.
Apatite compositions as a proxy for the oxidation states of porphyry Cu-Mo-Au deposits
A.S. Rukhlov, S.M. Rowins, M. Mao, L.A. Coogan, and J. Spence