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Eaglet property, southeastern British Columbia: Re-Os geochronology, sulphur isotopes, and thermobarometry
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SYSNO ASEP 0488680 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Eaglet property, southeastern British Columbia: Re-Os geochronology, sulphur isotopes, and thermobarometry Author(s) Hora, Z. D. (CA)
Stein, H. (US)
Žák, Karel (GLU-S) SAI, RID, ORCID
Dobeš, P. (CZ)Source Title Geological Fieldwork - ISSN 0381-243X
Roč. 2017, č. 1 (2018), s. 157-166Number of pages 10 s. Publication form Online - E Language eng - English Country CA - Canada Keywords Eaglet deposit ; MINFILE 093A 046 ; fluorite ; celestite ; molybdenite ; sulphur isotopes ; Re-Os geochronology ; fluid inclusion microthermobarometry Subject RIV DB - Geology ; Mineralogy OECD category Geology Institutional support GLU-S - RVO:67985831 Annotation New Re-Os age data from three molybdenite samples collected at the Eaglet property in southeastern British Columbia yielded model ages of 200.3, 233.8 and 251.6 Ma, but the signifi cance of these multiple ages remains unclear. Sulphur values of δ34S +6.00 to +12.91‰ for celestite are outside the range of published values for sulphates of marine origin and indicate some other crustal source of sulphate. Galena intergrown with celestite shows an overlapping δ34S of +12.07‰, but pyrite displays much lower δ34S values: +0.99 to -4.84‰. With δ34S restricted to -3.93 to -5.04‰, molybdenite suggests a single homogeneous sulphur source, in spite of the three signifi cantly different model ages. Fluid inclusions in fluorite samples display varied fluid types corresponding to three types of fluorite identified macroscopically. This is consistent with the idea of multiphase mineralization described for this deposit in previous reports. The minimum trapping pressure, constrained by temperature and composition, is 2.1 to 2.6 Kb. Workplace Institute of Geology Contact Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Year of Publishing 2019
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