Stikinia is a tectonostratigraphic terrane in the Canadian Cordillera comprised of
the Early Permian Asitka Group, the Late Triassic Stuhini Group and the Early to Middle
Jurassic Hazelton Group. William’s Gold property which coincides with the study area is
located on the east-northeast margin of the Stikine terrane within a fault mosaic of
Devonian to Permian Asitka Group carbonates and volcanic and sedimentary rocks of the
Stuhini Group.
The primary purpose of this study is to determine the timing of mineralization and
the absolute ages of the intrusions within the Williams west region of the William’s Gold
property. This study attempts to correlate mesothermal gold veining and Cu-Au porphyry
style mineralization from the study area with mineralization that has occurred
approximately 100km southeast at Kemess Mine.
U-Pb, Ar-Ar geochronology and Pb isotopic studies were used to determine the
ages and isotopic signatures of rocks located within the study area. Four samples of
quartz monzonite and one sample of a feldspar porphyry gave U-Pb crystallization ages
ranging from 221.4 to 183.6 Ma. Two samples G090062, and G090063 contained cores
that cluster between 230 and 260 Ma and 330 and 380 Ma. The oldest gave an age of
420Ma. The presence of older cores suggests that the intrusion passed through older
basement rocks, possibly the Paleozic Stikine Assemblage. A sample of alteration sericite
from the T-bill prospect that is believed to occur syn-mineralization was dated using the
Ar-Ar method and returned an inverse isochron age of 194.6 +/-3.5 Ma. The age of the
sericite alteration did not correspond to the ages of the five intrusive units analyzed
during this study. This suggests that the mineralization at the T-bill prospect was likely
not genetically related to any of the intrusions dated in this study.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:BVAU.2429/1114 |
| Date | 23 July 2008 |
| Creators | Bayliss, Sandra M. |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | text |
| Rights | Bayliss, Sandra M. |
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