00000nam 2200000zi 4500 9.895127 CaOODSP 20251031142448 m o d f cr |n||||||||| 210108t20202020oncd ob f|0| 0 eng d CaOODSP eng rda CaOODSP n-cn-on n-cn-qu n-cn-nu M183-2/8706E-PDF Pinet, N., author. The ups and downs of the Canadian Shield. 3, additional apatite fission-track analyses from the Musselwhite, Roberto, Meadowbank and Raglan mines, Ontario, Quebec, and Nunavut / N. Pinet and K. McDannell. [Ottawa] : Geological Survey of Canada, 2020. ©2020 1 online resource (49 pages) : charts. text txt rdacontent computer c rdamedia online resource cr rdacarrier Open file ; 8706 This record only includes the Open File report in PDF; the complete data set with all the files in various formats is available for free download at http://geoscan.nrcan.gc.ca/. Includes bibliographical references (pages 23-26). "The low-temperature (ca 120-60°C) thermal history of nine samples from four mines was investigated using the apatite fission-track (AFT) method. Analyses correspond to four samples from the Musselwhite mine over a 275 m vertical interval, three from the Roberto mine over a 382 m vertical interval and one sample from both the Meadowbank and Raglan mines. AFT inverse modelling using both HeFTy and QTQt softwares yield concordant results and indicate that a Phanerozoic heating episode was minor (< 20°C) or non-existent over the Musselwhite mine. This contrasts with previous AFT studies that document significant heating (> 20°C) due to sedimentary burial and indicates that the Canadian Shield did not react as a single entity during the last billion years. The thermal history of samples from the Roberto and Meadowbank mines are less constrained due to the lack of ‘high’ (> 120°C) temperature constraints. The sample from the Raglan mine yields the youngest central age among the samples reported in this study"--Abstract. Shields (Geology) Canada. Fission track dating. Boucliers (Géologie) Canada. Datation Méthode des traces de fission. Geological Survey of Canada, issuing body. Open file (Geological Survey of Canada) 8706. (CaOODSP)9.506878 PDF 4.31 MB https://publications.gc.ca/collections/collection_2021/rncan-nrcan/m183-2/M183-2-8706-eng.pdf (Open File report) HTML N/A https://doi.org/10.4095/321845 (complete data set)