| Title | Analysis of wireline logs and vertical seismic profiling data acquired with fibre-optic cable at the copper-gold New Afton porphyry deposit, British Columbia |
| Download | Download (whole publication) |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Bellefleur, G ;
Schetselaar, E; Wade, D; White, D; Enkin, R; Schmitt, D R |
| Source | Targeted Geoscience Initiative: 2018 report of activities; by Rogers, N (ed.); Geological Survey of Canada, Open File 8549, 2019 p. 235-241, https://doi.org/10.4095/313657  Open Access |
| Year | 2019 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is contained in Targeted Geoscience
Initiative: 2018 report of activities |
| File format | pdf |
| Province | British Columbia |
| NTS | 92I/09NW; 92I/10NE |
| Area | Kamloops |
| Lat/Long WENS | -120.5500 -120.4833 50.6833 50.6333 |
| Subjects | economic geology; structural geology; geophysics; mineral deposits; mineral exploration; exploration methods; porphyry deposits; metals; copper; gold; ore mineral genesis; mineralization; alteration
halos; alteration; geophysical logging; geophysical surveys; acoustic surveys; seismic surveys; seismic profiles; seismic waves; boreholes; bedrock geology; lithology; igneous rocks; intrusive rocks; diorites; monzonites; volcanic rocks; picrites;
structural features; faults; densities; Canadian Cordillera; New Afton Deposit; Methodology; Phanerozoic; Cenozoic; Tertiary; Mesozoic; Jurassic; Triassic |
| Illustrations | cross-sections; location maps; lithologic sections; profiles; geophysical logs; graphs; geophysical profiles; geoscientific sketch maps |
| Program | Targeted Geoscience Initiative (TGI-5) Knowledge Management Coordination |
| Program | Targeted Geoscience Initiative (TGI-5) Intrusion/Porphyry ore systems - arc-related porphyry systems - time and space |
| Released | 2019 03 01 |
| Abstract | Wireline logs and vertical seismic profile (VSP) data were acquired in two boreholes intersecting the mineralized zone and alteration halo at the copper-gold New Afton porphyry deposit, Canada. Log data
provide physical rock properties for the main lithologies and alteration zones. Calliper logs reveal many faults and caved-in zones indicating rocks with low integrity at the borehole wall. The preponderance of these zones as indicated by the logs
suggests that their response may dominate the seismic reflection wavefield. Distributed acoustic sensing (DAS) was used to acquire VSP data in the boreholes surveyed with logs. Straight and helically wound fibre-optic cables used for the VSP survey
housed standard fibres and a fibre engineered to increase the intensity of backscattering at the DAS interrogator. A new generation of DAS interrogator connected to the engineered fibres provided field data with lower noise level and higher
signal-to-noise ratio. Data with higher signal-to-noise ratio from straight fibre-optic cable were processed and used for depth imaging. Depth images benefitted from new migration weights that account for the directional sensitivity of the straight
fibre-optic cable and limit the extent of migration artefacts. Migration results show several reflectors with shallow dips to the northwest, some explained by faults intersecting the boreholes. The main sub-vertical lithological and alteration
contacts at New Afton generated downgoing reflections that were not considered in the migration. |
| Summary | (Plain Language Summary, not published)
The Targeted Geoscience Initiative (TGI) is directed towards providing next generation knowledge and methods to facilitate more effective targeting of
buried mineral deposits. The program aims to enhance the effectiveness of exploration for Canada's major mineral systems by resolving foundational geoscience problems that constrain the geological processes responsible for the liberation metals from
their source region, transportation of these ore metals and control their eventual deposition. TGI supports projects on gold, Ni-Cr-PGE, porphyry-style mineralization, uranium and volcanic- and sedimentary-hosted base metal mineralization ore
systems, with each project divided into subprojects focused on resolving specific knowledge gaps by integrating data and studies from multiple sites across Canada. Herein, we present interim results and interpretations from a selection of the
research activities currently being conducted under the auspices of TGI. |
| GEOSCAN ID | 313657 |
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