| Title | Three-dimensional analysis of magnetotelluric data from the New Afton porphyry deposit, central British Columbia |
| Download | Downloads |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Roots, E; Craven, J A; Schetselaar, E ; Enkin, R; Wade, D |
| Source | Targeted Geoscience Initiative 5: contributions to the understanding and exploration of porphyry deposits; by Plouffe, A (ed.); Schetselaar, E (ed.); Geological Survey of Canada, Bulletin 616, 2021 p. 53-64, https://doi.org/10.4095/327952  Open Access |
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| Year | 2021 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is contained in Targeted Geoscience
Initiative 5: contributions to the understanding and exploration of porphyry deposits |
| File format | pdf |
| Province | British Columbia |
| NTS | 92I/09; 92I/10 |
| Lat/Long WENS | -120.5500 -120.4833 50.7000 50.6167 |
| Subjects | economic geology; geophysics; structural geology; Science and Technology; Nature and Environment; mineral deposits; porphyry deposits; copper; gold; mineral exploration; ore mineral genesis;
mineralization; alteration; alteration halos; mapping techniques; geophysical surveys; magnetotelluric surveys; core samples; conductivity; resistivity; porosity; trend surface analyses; ore controls; structural controls; field methods; in-field
instrumentation; bedrock geology; structural features; faults; lithology; igneous rocks; intrusive rocks; picrites; diorites; monzonites; volcanic rocks; basalts; latites; sedimentary rocks; sandstones; software; modelling; New Afton Deposit; Pothook
Deposit; Nicola Group; Kamloops Group; Phanerozoic; Mesozoic; Triassic |
| Illustrations | location maps; geoscientific sketch maps; plots; 3-D models; 3-D images |
| Program | Targeted Geoscience Initiative (TGI-5) Intrusion/Porphyry ore systems - porphyry processes - mineral markers |
| Released | 2021 09 01; 2022 11 17 |
| Abstract | Magnetotelluric data were collected along eight lines perpendicular to the mineralized zone and alteration halo of the New Afton Cu-Au porphyry deposit. The data were collected at an interstation
spacing of 100 m and a line spacing of 300 m, and with a bandwidth of approximately 0.01 to 10 000 Hz. Phase tensor maps show an approximately east-west delineation of the survey into northern and southern sections. Determinant phase maps show
conductivities initially increasing with depth in the north and decreasing in the south, with this trend reversing at depth. Preliminary results from 3-D inversions show conductive cover underlain by more resistive material throughout most of the
survey area, with notably lower resistivities to the north. Two linear northeast-southwest features, spatially associated with the New Afton and Pothook mineralization, are imaged crosscutting the primary east-west fault zone, with high resistivities
in the north and low resistivities in the south. |
| Summary | (Plain Language Summary, not published)
This Bulletin published by the Geological Survey of Canada contains ten articles summarizing the results of five-year research projects conducted on
porphyry deposits in Canada as part of the Targeted Geoscience Initiative (TGI). Porphyry deposits are ore bodies, including past-producing and active mines, associated with intrusive rocks such as granite. They are significant producers of a variety
of metals, including copper, molybdenum, tin and tungsten. Nine out of ten papers describe projects conducted in the Canadian Cordillera where most Canadian porphyry deposits occur and a paper on similar, but older deposits in the Appalachians of
Atlantic Canada. The main objective of these TGI research projects was to better define the geological conditions where porphyry deposits form and test techniques to detect buried porphyry deposits in support of mineral exploration. |
| GEOSCAN ID | 327952 |
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