Open File 2010-03: Geology of Porcher Island and northern Grenville Channel, northwestern British Columbia

Geology of Porcher Island and northern Grenville Channel, northwestern British Columbia, (parts of NTS 103G/15,16; H/13; J/1 and J/2)

by Nelson, J., Mahoney, B., Gehrels, G. and van Staal, C.

Open File 2010-03

GSC Open File 6624

This open file covers 1:50,000 scale mapping conducted in 2009 on Porcher Island and adjacent islands, and the mainland coast on the eastern side of Grenville Channel. The area is underlain mostly by rocks of the southern Alexander terrane, intruded by a suite of mid-Cretaceous plutons. The Alexander terrane is a large composite crustal fragment that underlies part of the St. Elias Range on the Yukon-Alaskan border, and most of southeastern Alaska. It is of considerable exploration interest because of the volcanogenic massive sulphide deposits that it hosts, including Niblack and others on southern Prince of Wales Island just north of the BC-Alaska border, as well as a trend of Triassic deposits, notably Windy Craggy and the Greens Creek mine. The project is part of the Edges project of the national GEM program and is being delivered jointly with the Geological Survey of Canada.

Survey News

    · North Vancouver Island Field Trip
    Graham Nixon will be hosting a field trip on Northern Vancouver Island, May 15-16. Please contact Graham if you are interested in more information.

    · CMIC Innovation Workshop, Sunday, May 9, Vancouver, BC

      The Canada Mining Innovation Council is presenting a workshop on innovation, barriers to innovation, and the challenges of technology transfer. Leaders from industry (3M, Teck Resources, Barrick Gold) will present case studies and discuss how their companies overcome barriers to innovation, followed by an open dialogue.

      For more information and to register:

    · Mark your calendars! The 2nd annual BCGS Open House will be on November 10, 2010.


      Most provincial geoscience data can be easily accessed over the internet in map format at: and through various thematic pages at

      Printed BC Geological Survey geoscience publications are available from Crown Publications Inc.

      Tel: 250-387-6409 Fax: 250-387-1120

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      Questions or to update your contact info please contact Tania Demchuk:

      Email: Tel: 250-952-0417 Fax: 250-386-0221

      BC Geological Survey

      British Columbia Ministry of Energy, Mines and Petroleum Resources

      Mining and Minerals Division

      Release Notification 2010-05

      April 6, 2010