GAC-MAC-CSPG-CSSS Pre-conference Field Trips A1 Contamination in the South Mountain Batholith and Port Mouton Pluton, southern Nova Scotia HALIFAX Building Bridges—across science, through time, around2005 the world D. Barrie Clarke and Saskia Erdmann A2 Salt tectonics and sedimentation in western Cape Breton Island, Nova Scotia Ian Davison and Chris Jauer A3 Glaciation and landscapes of the Halifax region, Nova Scotia Ralph Stea and John Gosse A4 Structural geology and vein arrays of lode gold deposits, Meguma terrane, Nova Scotia Rick Horne A5 Facies heterogeneity in lacustrine basins: the transtensional Moncton Basin (Mississippian) and extensional Fundy Basin (Triassic-Jurassic), New Brunswick and Nova Scotia David Keighley and David E. Brown A6 Geological setting of intrusion-related gold mineralization in southwestern New Brunswick Kathleen Thorne, Malcolm McLeod, Les Fyffe, and David Lentz A7 The Triassic-Jurassic faunal and floral transition in the Fundy Basin, Nova Scotia Paul Olsen, Jessica Whiteside, and Tim Fedak Post-conference Field Trips B1 Accretion of peri-Gondwanan terranes, northern mainland Nova Scotia Field Trip A6 and southern New Brunswick Sandra Barr, Susan Johnson, Brendan Murphy, Georgia Pe-Piper, David Piper, and Chris White Geological setting of intrusion-related gold B2 The Joggins Cliffs of Nova Scotia: Lyell & Co's "Coal Age Galapagos" J.H. Calder, M.R. Gibling, and M.C. Rygel mineralization in southwestern New Brunswick B3 Geology and volcanology of the Jurassic North Mountain Basalt, southern Nova Scotia Dan Kontak, Jarda Dostal, and John Greenough Kathleen Thorne, Malcolm McLeod, B4 Stratigraphic setting of base-metal deposits in the Bathurst Mining Camp, New Brunswick Steve McCutcheon, Jim Walker, Pierre Bernard, David Lentz, Warna Downey, and Sean McClenaghan Les Fyffe, and David Lentz B5 Geology and environmental geochemistry of lode gold deposits in Nova Scotia Paul Smith, Michael Parsons, and Terry Goodwin B6 The macrotidal environment of the Minas Basin, Nova Scotia: sedimentology, morphology, and human impact Ian Spooner, Andrew MacRae, and Danika van Proosdij B7 Transpression and transtension along a continental transform fault: Minas Fault Zone, Nova Scotia John W.F. Waldron, Joseph Clancy White, Elizabeth MacInnes, and Carlos G. Roselli B8 New Brunswick Appalachian transect: Bedrock and Quaternary geology of the Mount Carleton – Restigouche River area Reginald A. Wilson, Michael A. Parkhill, and Jeffrey I. Carroll B9 Gold metallogeny in the Newfoundland Appalachians Andrew Kerr, Richard J. Wardle, Sean J. O'Brien, David W. Evans, and Gerald C. Squires Geological Association of Canada Mineralogical Association of Canada - Canadian Society of Petroleum Geologists - Canadian Society of Soil Sciences Joint Meeting - Halifax, May 2005 Field Trip A6 Geological setting of intrusion-related gold mineralization in southwestern New Brunswick Kathleen Thorne1, Malcolm McLeod2, Les Fyffe1, and David Lentz3 1New Brunswick Department of Natural Resources P.O. Box 6000, Fredericton, New Brunswick, Canada E3B 5H1 2New Brunswick Department of Natural Resources P.O. Box 5040, Sussex, New Brunswick, Canada E4E 5L2 3Department of Geology, University of New Brunswick Fredericton, New Brunswick, Canada E3B 5A3 © Atlantic Geoscience Society Department of Earth Sciences Dalhousie University Halifax, Nova Scotia, Canada B3H 3J5 ISBN 0-9737981-4-9 AGS Special Publication Number 25 TABLE OF CONTENTS Page SAFETY ......................................................................................................................1 TRIP ITINERARY ......................................................................................................3 INTRODUCTION .......................................................................................................4 GEOLOGICAL SETTING ..........................................................................................5 Regional Geological Setting ........................................................................................5 General Geological Setting of the Clarence Stream area.............................................8 Tectonic Considerations.............................................................................................10 DAY 1 – Geology of southwestern New Brunswick.................................................15 Geological Setting......................................................................................................15 Stratigraphy................................................................................................................15 Fredericton Belt................................................................................................15 St. Croix Belt ....................................................................................................16 Mascarene Belt..................................................................................................17 East Branch Brook Metagabbro...............................................................18 Magaguadavic Granite.............................................................................19 Structure.....................................................................................................................19 Stop Descriptions.......................................................................................................20 Stop 1 – Digdeguash Formation .......................................................................20 Stop 2 – Moores Mills Quarry ..........................................................................21 Stop 3a – Calais - Oak Bay formational contact...............................................23 Stop 3b – Oak Bay - Waweig (Campbell Point Member) formational contact......................................................................................................24 Stop 3c – Gabbro intrusion within Waweig Formation....................................25 Stop 3d – Sawyer Brook Member of the Waweig Formation ..........................25 Stop 3e – Felsic volcanic unit in the Simpson Corner Member of the Waweig Formation...................................................................................26 Stop 4 – Granitic dykes along margin of the Saint George Batholith ..............26 DAY 2 – Clarence Stream Gold Deposit...................................................................28 Introduction................................................................................................................28 Geological Setting......................................................................................................28 Main Zone Deposits...................................................................................................29 Anomaly A Deposits..................................................................................................32 Stop Descriptions.......................................................................................................34 Stop 5 – Magaguadavic Granite........................................................................34 Stop 6 – Clarence Stream Trench 1 ..................................................................34 Stop 7 – Clarence Stream Trench 2 ..................................................................36 Stop 8 – Clarence Stream Trench 7 ..................................................................37 Stop 9 – Clarence Stream Trench 4 ..................................................................38 Stop 10 – Anomaly A – Murphy Zone Trench.................................................40 Stop 11 – Anomaly A – AD Trench .................................................................41 Stop 12 – Clarence Stream core at Mount Pleasant mine site ..........................43 DAY 3 – Mount Pleasant Sn-W-Mo-Bi Mine and Related Deposits ........................44 Introduction................................................................................................................44 The Fire Tower Zone Deposit....................................................................................46 McDougall Brook Granite .........................................................................................47 Kedron Granite...........................................................................................................47 Stop Descriptions.......................................................................................................48 Stop 13a – McDougall Brook Au occurrence...................................................48 Stop 13b – Kedron core ....................................................................................49 Stop 14a – Mount Pleasant – Fire Tower Zone ................................................50 Stop 14b – Mount Pleasant – Tailings Pile.......................................................51 ACKNOWLEDGEMENTS.......................................................................................52 REFERENCES ..........................................................................................................52 LIST OF FIGURES Page Figure 1: Field trip stop locations........................................................................5 Figure 2: Tectonic divisions of the Atlantic Provinces .......................................6 Figure 3: Geology of southwestern New Brunswick ..........................................7 Figure 4: Stratigraphic column for the Mascarene, St. Croix, and Fredericton belts...................................................................................9