Revised geological map of Mount Nansen area (NTS 115/I3 and part of 115I/2)
Description
This map presents a compilation and re-interpretation of the bedrock geology in the Mount Nansen area. It is an update from the preliminary version released in 2021. The main updates are based on new U-Pb zircon ages for Cretaceous magmatic rocks. Most economically significant are the CA-TIMS U-Pb zircon crystallization ages for the Kelly (ca. 78 Ma) and Cyprus porphyries (ca. 71 Ma) and the LA-ICPMS U-Pb zircon crystallization age of ca. 111 Ma for the Dickson Hill plug. New CA-TIMS crystallization ages (ca. 108 Ma) for two phases of the Bow Creek granite redefine that body as part of the Whitehorse magmatic suite and a new LA-ICPMS crystallization age of ca. 199 Ma from the deformed granodiorite which hosts the Brown-McDade deposit confirm a Minto suite designation for those rocks.
Resources
| Name |
Format |
Description |
Link |
| Yukon Geological Survey publication metadata |
HTML |
|
https://data.geology.gov.yk.ca/Reference/95959 |
| Original metadata (https://open.yukon.ca) |
HTML |
|
https://open.yukon.ca/information/cdf3b061-e9a9-45fb-ac92-a7fefa88deb5 |
| maps |
ZIP |
|
https://ygsftp.gov.yk.ca/publications/openfile/2022/OF2022-4.zip |