GEOLOGICAL SURVEY OF CANADA COMMISSION GEOLOGIQUE DU CANADA CURRENT RESEARCH 1994-A CORDILLERA AND PACIFIC MARGIN RECHERCHES EN COURS 1994-A CORDILLERE ET MARGE DU PACIFIQUE Natural Resources Ressources naturelles Canada Canada NOTICE TO LIBRARIANS AND INDEXERS The Geological Survey's Current Research series contains many reports comparable in scope and subject matter to those appearing in scientific journals and other serials. Most contributions to Current Research include an abstract and bibliographic citation. It is hoped that these will assist you in cataloguing and indexing these reports and that this will result in a still wider dissemination of the results of the Geological Survey's research activities. La sCrie Recherches en cours de la Commission gtologique contient plusieurs rapports dont la portte et la nature sont comparables A ceux qui paraissent dans les revues scientifiques et autres ptriodiques. La plupart des articles publiks dans Recherches en cours sont accompagnts d'un r6sumC et d'une bibliographic, ce qui vous permettra, on I'esp?re, de cataloguer et d'indexer ces rapports, d'oc une meilleure diffusion des rksultats de recherche de la Commission gtologique. GEOLOGICAL SURVEY OF CANADA COMMISSION GEOLOGIQUE DU CANADA CURRENT RESEARCH 1994-A CORDILLERA AND PACIFIC MARGIN RECHERCHES EN COURS 1994-A CORDILLERE ET MARGE DU PACIFIQUE O~inisterof Energy, Mines and Resources Canada 1994 Available in Canada through authorized bookstore agents and other bookstorcs or by mail from Canada Conlnlunication Group - Publishing Ottawa, Canada KIA OS9 and from Geological Survey of Canada offices: 601 Booth Street Ottawa, Canada K I A OE8 3303-33rd Strect N.W., Calgary, Alberta T2L 2A7 l00 West Pender Strect Vancouver, B.C. V6B IR8 A deposit copy of this publication is also available for reference in public libraries across Canada Cat. No. M44- 1994 1 ISBN 0-660-58982-6 Price subject to change without notice Cover description View north across Iskut River to Hoodoo Mountain. Its distinctive domical shape and relatively flat summit suggest the origin of thc Hoodoo Mountain volcanic centre as a tuya, or subglacial volcano comprising trachyte lava flows and domes interlayered with pyroclastic rocks and deposits erupted over the past l l0 000 years. For more information on the Hoodoo Mountain centre see the report by awards and Russell on pages 67-76. (photo by R.G. Anderson, 1993; GSC 1993-304). Description de la photo couverture Le mont Hoodoo, vu vers le nord de I'autre c6tC de la riviere Iskut. La forme caracteristique en d6me et le sommet relativement plat du mont donnent a penser que le centre volcanique de Hoodoo Mountain etait a I 'originc un tuya, ou volcan sous-glaciaire, comportant des d6mes et des coulkes de laves trachytiques interstratifies de roches et de dipbts pyroclastiques CpanchCs au cours des l l0 000 demi6res annees. Pour de plus amples renseignements sur le centre volcanique de Hoodoo Mountain, voir le rapport par awards et Russell aux pages 67-76 (photo de R.G. Anderson, 1993; GSC 1993-304). I GEOLOGICAL SURVEY OF CANADA SECTOR ASSISTANT DEPUTY MINISTER Chief Scientist SOUS-MINISTRE ADJOINT Bureau du SEUEUR DE LA Scientifique principal 1 COMMISSION GEOLOG111UE du CANADA I Geophysics, Sedimentary and Minerals and Continental Marine Geoscience Branch Geoscience Branch I Direction de la geophysique, Direction des ressources minkrales et de la geologie et de la gkologie du continent F1 sedimentaire et marine L Atlantic Resources Geoscience Geoscience Geoscience Geoscience Geophysics Division Division Centre Centre Centre Division Division des Division de la Centre Centre Centre geoscientifique Division de la ressources geologie du gkoscientifique gkoscientifique geophysique minCrales continent de QuCbec de I'Atlantioue Terrain Cordilleran Sedimentary 1 Division 1 1 1 and Petroleum Geology Division de la Division de la Cordillire sciences lnstitut de 1 1 1 des Terrains 1 geologie sedimentaire et ~etrolliire Geoscience Polar Coordination and Planning Information and Continental Division Communications Shelf Project Division de la coordination Division ~tudedu et de la planification Division de plateau I'information continental geoscientifique et des communications Separates Tirks B part A limited number of separates of the papers that appear in On peut obtenir un nombre limitc de cctirks h part)> dcs this volume are available by direct request to the individual articles qui paraissent dans cette publication cn s'adrcssant authors. The addresses of the Geological Survey of Canada directement a chaque auteur. Les adresses dcs diffkrents offices follow: bureaux de la Commission gkologique du Canada sont les suivantes: 601 Booth Street 60 l, rue Booth OTTAWA, Ontario OTTAWA, Ontario KlA OE8 KlA OE8 (FAX: 613-996-9990) (facsimilt : 61 3-996-9990) Institute of Sedimentary and Petroleum Geology Institut de gtologie skdimentaire et pktroliere 3303-33rd Street N.W. 3303-33rd St. N.W., CALGARY, Alberta CALGARY, Alberta T2L 2A7 T2L 2A7 (FAX: 403-292-5377) (facsimilt : 403-292-5377) Cordilleran Division Division de la Cordillere 100 West Pender Street 100 West Pender Street VANCOUVER, B.C. VANCOUVER, British Columbia V6B 1R8 V6B 1 R8 (FAX: 604-666-1 124) (facsimilt : 604-666-1 124) Pacific Geoscience Centre Centre gtoscientifique du Pacifiquc P.O. Box 6000 P.O. Box 6000 9860 Saanich Road 9860 Saanich Road SIDNEY. B.C. SIDNEY, British Columbia V8L 4B2 V8L 4B2 (Fax: 604-363-6565) (facsimilt : 604-363-6565) Atlantic Geoscience Centre Centre gkoscientifique de I'Atlantiquc Bedford Institute of Oceanography Institut ockanographique Bedford P.O. Box 1006 B.P. 1006 DARTMOUTH, N.S. DARTMOUTH, Nova Scotia B2Y 4A2 B2Y 4A2 (FAX: 902-426-2256) (facsimilk : 902-426-2256) QuCbec Geoscience Centre Centre gkoscientifique de Quebec 2700, rue Einstein 2700, rue Einstein C.P. 7500 C.P. 7500 Ste-Foy (Quebec) Ste-Foy (Qutbec) GlV 4C7 G1V 4C7 (FAX: 41 8-654-261 5) (facsimilk : 41 8-654-261) When no location accompanies an author's name in the Lorsque I'adressc de l'auteur nc figure pas sous lc titre title of a paper, the Ottawa address should be used. d'un document, on doit alors utiliser I'adrcsse d'ottawa. CONTENTS Preliminary stratigraphy from Lansing map area, Yukon Territory C. Roots and D. Brent ..................................... .l Tectonic framework of the Teslin region, southern Yukon Territory S.P. Gordey and R.A. Stevens ................................. 1 1 Operation Bouguer - the final phase of a gravity survey in the northern Cordillera C. Eowe, D.A. Seernann, D.B. Hearty, and D.W. Halliday ................. 19 New sulphide occurrences in the northeastern part of Iskut River map area and southeastern part of Telegraph Creek map area, northwestern British Columbia M.H. Gunning, K. Patterson, and D. Green .........................25 Stratigraphic and structural setting of mineral deposits in the Brucejack Lake area, northwestern British Columbia A.G.S. Davies, P.D. Lewis, and A.J. Macdonald ...................... 37 Geology of the Cambria Icefield: regional setting for Red ~ountaingold deposit, northwestern British Columbia CJ. Greig, R.G. Anderson, P.H. Daubeny, K.F. Bull, and T.K. Hinderman .......45 Recent basaltic volcanism in the Iskut-Unuk rivers area, northwestern British Columbia S. Rauksd6ttir, E.G. Enegren, and J.K. Russell ....................... 57 Preliminary stratigraphy of Hoodoo Mountain volcanic centre, northwestern British Columbia B.R. Edwards and J.K. Russell ................................ 69 Geology and origins of the Zippa Mountain igneous complex with emphasis on the Zippa Mountain pluton, northern British Columbia B.A. Lueck and J.K. Russell ................................. 77 . Northern continuation of the Eastern Waddington Thrust Belt and Tyaughton Trough, Tatla Lake-Bussel Creek map areas, west-central British Columbia P. van der Heyden, P.S. Mustard, and R. Friedman .................... 87 Stratigraphy and sedimentology of the Tatla Lake-Bussel Creek map areas, west-central British Columbia P.S. Mustard and P. van der Heyden. ............................ 95 Preliminary study of Tertiary volcanic stratigraphy in the Clisbako River area, central British Columbia P. Metcalfe and C.J. Hickson ................................ 105 The geology and structure of the Coryell Batholith, southern British Columbia P. Stinson and P.S. Simony ................................. 109 A new regional mapping project in Vernon map area, British Columbia R.I. Thompson and K.L. Daughtry ............................. 1 17 Was the depositional environment of the Sullivan Zn-Pb deposit in British Columbia marine or lacustrine and how saline was it?: a summary of the data F.W. Chandler and G.A. Zieg ................................ 123 Field evidence for Early Proterozoic tectonism in core gneisses of Frenchman Cap dome, Monashee complex, southern Canadian Cordillera J.L. Crowley and P.M. Schaubs .............................. 13 1 Geology of Big Bar map area, British Columbia: facies distribution in the Jackass Mountain Group C.J. Hickson, J.B. Mahoney, and P. Read ......................... 143 Preliminary studies of Recent volcanic deposits in southwestern British Columbia using ground penetrating radar M.V. Stasiuk and J.K. Russell ............................... 15 1 Turonian (Upper Cretaceous) strata and biochronology of southern Gulf Islands, British Columbia J.W. Haggart ......................................... 159 Cayoosh Assemblage: regional correlations and implications for terrane linkages in the southern