BOSS- SURPRISE LAKE BATHOLITH

• Main Authors: Mount Leonard, P. A. Christophel
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Weir; Atlin; Atlin Lake; Alaska
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.176.6171; http://www.empr.gov.bc.ca/Mining/Geoscience/PublicationsCatalogue/Fieldwork/Documents/1979/08_christopher_p75-79.pdf

Regional mapping of the Surprise Lake batholith was initiated during the 1979 field season. The Mount Leonard boss, the most westerly segment of the Surprise Lake batholith, was mapped during July and August. Continuation of mapping in the batholith is planned for 1980. The maparea (Fig. 23). within the Atlin Horst tectonic subdivision, is situated east of Atlin Lake in northern British Columbia with the centre of the Surprise Lake batholith at latitude 59 degrees 42 minutes north and longitude 132 degrees 53 minutes west. The area is mountainous with peak elevations of 1 800 to 2 100 metres and the valley containing Surprise Lake at about 942 metres. Access is way and Highway 7 to Atlin. A good!'ia the Alaska Iiigh-gravel road exists between Atlin and Surprise Lake and various mining roads provide access to most of the batholith situated northwest of Surprise Lake. Several mining companies actively explored the area around Ruby Mountain during 1979. Prospecting and exploration efforts in the Surprise Lake batholith have located intermting molybdenum and/or tungsten properties including Adanac (molybdenum), Gladys Lake (molybdenum), Black Diamond (tungsten), and Weir Mountain (molybdenum, tungsten). Geochemical data obtained flom stream sill: and water samples collected during the Uranium Reconnaissance Program in 1977 demonstrate that the Surprise