Marsh, Erin E, Goldfarb, Richard J, Hart, Craig J.R, Johnson, Craig A (2003) Geology and geochemistry of the Clear Creek intrusion-related gold occurrences, Tintina Gold Province, Yukon, Canada. Canadian Journal of Earth Sciences, 40 (5) 681-699 doi:10.1139/e03-018
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Geology and geochemistry of the Clear Creek intrusion-related gold occurrences, Tintina Gold Province, Yukon, Canada | ||
| Journal | Canadian Journal of Earth Sciences | ||
| Authors | Marsh, Erin E | Author | |
| Goldfarb, Richard J | Author | ||
| Hart, Craig J.R | Author | ||
| Johnson, Craig A | Author | ||
| Year | 2003 (May 1) | Volume | 40 |
| Issue | 5 | ||
| Publisher | Canadian Science Publishing | ||
| DOI | doi:10.1139/e03-018Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 483818 | Long-form Identifier | mindat:1:5:483818:4 |
| GUID | 0 | ||
| Full Reference | Marsh, Erin E, Goldfarb, Richard J, Hart, Craig J.R, Johnson, Craig A (2003) Geology and geochemistry of the Clear Creek intrusion-related gold occurrences, Tintina Gold Province, Yukon, Canada. Canadian Journal of Earth Sciences, 40 (5) 681-699 doi:10.1139/e03-018 | ||
| Plain Text | Marsh, Erin E, Goldfarb, Richard J, Hart, Craig J.R, Johnson, Craig A (2003) Geology and geochemistry of the Clear Creek intrusion-related gold occurrences, Tintina Gold Province, Yukon, Canada. Canadian Journal of Earth Sciences, 40 (5) 681-699 doi:10.1139/e03-018 | ||
| In | (2003, May) Canadian Journal of Earth Sciences Vol. 40 (5) Canadian Science Publishing | ||
| Abstract/Notes | The Clear Creek gold occurrences lie within deformed lower greenschist-facies rocks of the western Selwyn basin. They consist of auriferous, sheeted quartz veins that cut six Cretaceous stocks and their hornfels. The veins contain 12% combined pyrite and arsenopyrite, with lesser pyrrhotite, bismuthinite, and scheelite, as well as 25 g/t Au. New 40Ar/39Ar geochronology of hydrothermal micas indicates that the veins formed within 12 million years of granitoid emplacement. Fluid inclusion microthermometry defines a parent ore fluid of ~81 mol.% H2O, 14 mol.% CO2, 4 mol.% NaCl ± KCl, and 1 mol.% CH4, which unmixed into a low- and high-salinity immiscible pair. This suggests a more saline parent fluid and a greater degree of fluid unmixing relative to the other occurrences in the eastern Tintina Gold Province. Inclusions trapped in As- and Bi-rich, high-gold grade veins have homogenization temperatures of 300350°C, whereas inclusions found in more Ag- and Pb-rich veins are characterized by temperatures of 250300°C. Fluid inclusion geobarometry suggests hydro-fracturing and gold deposition at 57 km depth. The δ18O values of quartz samples range from 1316 (per mil) and δ34S for sulfides are also consistent between 3.0 and 0, with the exception of some outliers from the Contact Zone of the Pukelman stock that indicate a lower temperature second phase of mineralization. It remains uncertain as to whether the Clear Creek ore fluids were exsolved from magmas at depth or from devolatilization reactions within the contact metamorphic aureoles of the intrusions. | ||
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