| Reference Type | Journal (article/letter/editorial) |
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| Title | Protracted hydrothermal alteration of the Burgundy alkalic porphyry prospect determined by in situ U-Pb and Rb-Sr petrochronology, northwestern British Columbia, Canada |
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| Journal | Ore Geology Reviews |
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| Authors | Beno, Carl J. | Author |
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| Dlugosz, Joanna | Author |
| Larson, Kyle P. | Author |
| Dyck, Brendan | Author |
| Wasiliew, Ali | Author |
| Karadimas, Phoenix | Author |
| Button, Mark | Author |
| Shrestha, Sudip | Author |
| Year | 2025 | Volume | < 180 > |
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| Page(s) | 106557 |
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| URL | |
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| DOI | doi:10.1016/j.oregeorev.2025.106557Search in ResearchGate |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 18173405 | Long-form Identifier | mindat:1:5:18173405:7 |
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| GUID | 0 |
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| Full Reference | Beno, Carl J., Dlugosz, Joanna, Larson, Kyle P., Dyck, Brendan, Wasiliew, Ali, Karadimas, Phoenix, Button, Mark, Shrestha, Sudip (2025) Protracted hydrothermal alteration of the Burgundy alkalic porphyry prospect determined by in situ U-Pb and Rb-Sr petrochronology, northwestern British Columbia, Canada. Ore Geology Reviews, 180. 106557 doi:10.1016/j.oregeorev.2025.106557 |
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| Plain Text | Beno, Carl J., Dlugosz, Joanna, Larson, Kyle P., Dyck, Brendan, Wasiliew, Ali, Karadimas, Phoenix, Button, Mark, Shrestha, Sudip (2025) Protracted hydrothermal alteration of the Burgundy alkalic porphyry prospect determined by in situ U-Pb and Rb-Sr petrochronology, northwestern British Columbia, Canada. Ore Geology Reviews, 180. 106557 doi:10.1016/j.oregeorev.2025.106557 |
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| In | Link this record to the correct parent record (if possible) |
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| Abstract/Notes | The Late Triassic Burgundy porphyry system in the Golden Triangle of northwest British Columbia, Canada hosts Cu-Au mineralization in multiple prospective centers. Preliminary geologic mapping of the surface expression of the prospect and a cross section through the southern extension at The Ridge provide a preliminary structural understanding of the system with respect to the surrounding host rocks. The porphyries that make up the Burgundy prospect are emplaced into Upper Stikine Assemblage to Lower Stuhini Group strata with discrete episodes of texturally and geochemically distinct porphyry emplacement and igneous/hydrothermal brecciation. Lithogeochemical data indicate the prospect is a silica-undersaturated alkalic porphyry system consistent with the ubiquitous absence of quartz. A complex history of potassic, calc-potassic, phyllic, and propylitic alteration events overprint the porphyries, breccias, and wallrocks. The age of alteration was determined using in situ U-Pb and Rb-Sr geochronology. Titanite U-Pb (212.8 [±2.6] to 208.6 [±1.9] Ma), apatite U-Pb (216.7 [±2.9] to 208.2 [±4.1] Ma), garnet U-Pb (215.1 [±1.3] to 211.4 [±0.95] Ma), and biotite Rb-Sr (218.9 [±5.4] to 200.5 [±0.5] Ma) ages are interpreted alongside trace and major element geochemistry to reflect the timing of hydrothermal precipitation and/or equilibration of the dated phases during infiltration of hydrothermal fluids. The geochronology results define a minimum emplacement age for the porphyry suite and outline a protracted period (>10 Myr) of localized, likely episodic, post-emplacement hydrothermal alteration/equilibration. The oldest ages from apatite (216.7 ± 2.9 Ma), garnet (215.1 ± 1.3 Ma), and biotite (218.9 ± 5.4 Ma) indicate emplacement of Burgundy porphyries began before emplacement of the neighboring Galore Creek alkalic suite (212â205 Ma). In addition, the youngest biotite date (200.5 ± 0.5 Ma) indicates Burgundy experienced localized high-T hydrothermal fluid infiltration associated with either a long-lived hydrothermal system related to cooling of structurally deeper Burgundy melts and/or externally derived fluids during the onset of local Tatogga/Texas Creek suite magmatism. The new age data from Burgundy indicate alkalic magmatism in the Golden Triangle began earlier than is currently recognized within the working regional framework model and that Burgundy was a conduit for protracted hydrothermal activity during this critical metallogenic epoch near the Triassic-Jurassic boundary. |
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| Zhou (2022) Lithos Multiple magmatic-hydrothermal processes recorded by titanite from the Early Cretaceous Liangwan pluton, Tongbai Orogen 428â429 |
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