| Title | Lithologic controls on Paleoproterozoic BIF-hosted/associated gold: overview of Re-Os geochronology and Pb isotopes preliminary results |
| Download | Download (whole publication) |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Mercier-Langevin, P; Valette, M; De Souza, S; Creaser, R A; McNicoll, V J; Grondin-LeBlanc, P; St. Pierre, B; Lauzon, M -C; Malo, M; Côté-Mantha, O; Simard, M |
| Source | Targeted Geoscience Initiative: 2017 report of activities, volume 1; by Rogers, N (ed.); Geological Survey of Canada, Open File 8358, 2018 p. 147-152, https://doi.org/10.4095/306466  Open Access |
| Year | 2018 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is contained in Targeted Geoscience
Initiative: 2017 report of activities, volume 1 |
| File format | pdf |
| Province | Nunavut |
| NTS | 45M; 46D; 46E; 46L; 46M; 47D; 55; 56; 57A; 57B; 65; 66A; 66B; 66C; 66F; 66G; 66H; 66I; 66J; 66K; 66N; 66O; 66P; 67A |
| Area | Meliadine District |
| Lat/Long WENS | -104.0000 -86.0000 68.5000 60.0000 |
| Subjects | economic geology; tectonics; geochronology; mineral deposits; mineral exploration; mineral potential; gold; ore mineral genesis; mineralization; ore controls; modelling; bedrock geology; basement
geology; lithology; sedimentary rocks; iron formations; igneous rocks; intrusive rocks; syenites; granites; greenstones; metamorphic rocks; gneisses; structural features; faults; shear zones; metamorphism; radiometric dating; isotopic studies; lead
isotope ratios; metallotects; tectonic history; hydrothermal systems; orogenesis; scanning electron microscopy; mass spectrometer analysis; arsenopyrite; pyrrhotite; Archean; Canadian Shield; Western Churchill Province; Hearne Domain; Rae Domain;
Chesterfield Block; Chesterfield Fault Zone; Amaruq Deposit; Vault Deposit; Meadowbank Deposit; Tiriganiaq Deposit; Three Bluffs Deposit; Nueltin Suite; Dubawnt Supergroup; Amer Shear Zone; Happy Lake Shear Zone; Josephine River Shear Zone; Pyke
Fault; Queen Maud Block; Snowbird Tectonic Zone; Tyrrell Shear Zone; Wager Bay Shear Zone; Paleoproterozoic; Precambrian; Proterozoic |
| Illustrations | geoscientific sketch maps; photomicrographs |
| Program | Targeted Geoscience Initiative (TGI-5) Knowledge Management Coordination |
| Program | Targeted Geoscience Initiative (TGI-5) Gold systems |
| Released | 2018 01 19 |
| Abstract | Eastern Nunavut represents an excellent site to study BIF-hosted gold deposits. Many examples of this type of deposit are present in this region that is largely underlain by Neoarchean rocks that were
deformed at Archean and Paleoproterozoic times. Recent research indicates that what was previously considered to be a simple Early Proterozoic gold metallotect associated with the Trans-Hudson orogen at ca. 1.9 to 1.8 Ga rather appears to be a long,
multiphase hydrothermal history associated with a number of distinct orogenic events. Preliminary Re-Os analyses on ore-associated arsenopyrite from the Amaruq deposit suggest a major time span with the youngest model ages at ca. 2250 and the oldest
at ca. 2650 Ma. Such a long ore-forming history is in agreement with results obtained in the Meliadine district where arsenopyrite Re-Os ages range from 2.3 Ga to 1.8 Ga. The oldest model ages suggest that the Archean basement and host rocks may have
played an active role in forming the Paleoproterozoic gold systems. |
| 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 | 306466 |
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