The Occurrence and Petrology of Basic Intrusions
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A Geological Reconnaissance of the Northern Selwyn Mountains Region, Yukon and Northwest Territories
CANADA - DEPARTMENT OF MINES AND TECHNICAL SURVEYS I PAPER 53-7 I A GEOLOGICAL RECONNAISSANCE OF THE NORTHERN SELWYN MOUNTAINS REGION, YUKON AND NORTHWEST TERRITORIES By J. 0. Wheeler "". OTTAWA 1954 Price, 50 cents CANADA DEPARTMENT OF MINES AND TECHNICAL SURVEYS GEOLOGICAL SURVEY OF CANADA Pape r 53- 7 A GEOLOGICAL RECONNAISSANCE OF THE NORTHERN SELWYN MOUNTAINS REGION, YUKON AND NORTHWEST TERRITORIES By J. 0. Whe ele r OTTAWA 1953 Price, 50 cents CONTENTS Page Introd uction ..................... ................. .. 1 Historic al notes ..... .............................. 2 A ccessibility and transport ation ...................... 3 Natural resources ...... ...... .............. .. ... 3 Phy siography ..... .. .. ...................... .. ....... 4 Drainage .......................................... 5 Selwy n Valley ............. .... ... ...... ... ..... 5 Valleys . ......•..................................... 6 Upland areas ........................... ........... 6 Influence of structure and lithology ....... .... ........ 6 Cirques ....... .............. ....... ..... ......... 7 Nivation features . .. ... ... .... .......... .... ...... 7 Land slides and rock glaciers ......................... 7 Height of drift ......................... .. ........... 8 Thickness of drift .................................. 9 Constructional features 9 Glaciation ... .......... .. ............. .. ..•.......... 10 Maximum elevation and thickness of valley g laciers ..... 10 Direction of ice movement ....... .............. .•.. .. 10 General geolog -
Glaciation and the Physical, Chemical and Biological Limnology of Yukon ·Lakes
i i © Minister of Supply and Services Canada 1981 Cat. no. Fs 97-6/966 ISSN 0706-6457 Correct citation for this publication: Lindsey, C. C., K. Patalas, R. A. Bodaly, and C. P. Archibald. 1981. Glaciation and the physical, chemical and biological limnology of Yukon ·lakes. Can. Tech·. Rep. Fish. Aquat Sri. 966: v·i + 37 p. iii I TABLE OF CONTENTS .Iohle. Page g Temperature (temp) (°C) and oxygen (mg/L) profiles for lakes of the ABSTRACT/RESUME v Stewart, Takhini, Tatchun, Teslin, ·and White subdrainages of tile INTRODUCTION . 1 Yukon River drainage system 18 10 Water chemistry of lal~es of the Alsek, SOURCES AND METHODS 1 Liard, Peel, and Porcupine River drainage systems • . 19 RESULTS AND DISCUSSION 11 Water chemistry of lakes of the Atlin, Physical Limnology Lewe~. Mandanna, Nordenskiold, Lake area 2 Pelly;·Big Salmon, and Little Maximum depth 2 Salmon subdrainages of the Yukon Elevation 2 River drainage system 20 Temperature . 2 12 Water chemistry of lakes of the Stewart, Chemical Limnology Takhini, Tatchun, Teslin, and White Total dissolved solids (TDS) 2 subdrainages of the Yukon River Major ions, chlorophyll a, and Secchi 2 drainage system 21 disc visibility • 13 Absolute abundance of crustaceans, Oxygen content . 2 rotifers. and total zooplankton Glaciological Background 2 (crustaceans plus rotifers) and Zooplankton Abundance and Distribution 3 relative abundance (% by number) Glacial History and Fish Distributions 4 of crustacean species for lakes Alsek and White River drainages 4 of the Alsek, Liard, Peel and Por- Yukon River drainages 4 cupine River drainage systems 22 Liard River drainages . 6 14 Absolute abundance of crustaceans, Peel and Porcupine River drainages 6 rotifers, and total zooplankton (crustaceans plus rotifers) and ACKNOWLEDGMENTS 7 relative abundance (% by number) of crustacean species for lakes REFERENCES 8 of the Atlin, Lewes, Mandanna, Nordenskiold, Pelly, Big Salmon, and Little Salmon subdrainages of the Yukon River drainage LIST OF TABLES system . -
E-Book on Dynamic Geology of the Northern Cordillera (Alaska and Western Canada) and Adjacent Marine Areas: Tectonics, Hazards, and Resources
Dynamic Geology of the Northern Cordillera (Alaska and Western Canada) and Adjacent Marine Areas: Tectonics, Hazards, and Resources Item Type Book Authors Bundtzen, Thomas K.; Nokleberg, Warren J.; Price, Raymond A.; Scholl, David W.; Stone, David B. Download date 03/10/2021 23:23:17 Link to Item http://hdl.handle.net/11122/7994 University of Alaska, U.S. Geological Survey, Pacific Rim Geological Consulting, Queens University REGIONAL EARTH SCIENCE FOR THE LAYPERSON THROUGH PROFESSIONAL LEVELS E-Book on Dynamic Geology of the Northern Cordillera (Alaska and Western Canada) and Adjacent Marine Areas: Tectonics, Hazards, and Resources The E-Book describes, explains, and illustrates the have been subducted and have disappeared under the nature, origin, and geological evolution of the amazing Northern Cordillera. mountain system that extends through the Northern In alphabetical order, the marine areas adjacent to the Cordillera (Alaska and Western Canada), and the Northern Cordillera are the Arctic Ocean, Beaufort Sea, intriguing geology of adjacent marine areas. Other Bering Sea, Chukchi Sea, Gulf of Alaska, and the Pacific objectives are to describe geological hazards (i.e., Ocean. volcanic and seismic hazards) and geological resources (i.e., mineral and fossil fuel resources), and to describe the scientific, economic, and social significance of the earth for this region. As an example, the figure on the last page illustrates earthquakes belts for this dangerous part of the globe. What is the Northern Cordillera? The Northern Cordillera is comprised of Alaska and Western Canada. Alaska contains a series of parallel mountain ranges, and intervening topographic basins and plateaus. From north to south, the major mountain ranges are the Brooks Range, Kuskokwim Mountains, Aleutian Range, Alaska Range, Wrangell Mountains, and the Chugach Mountains. -
Article Is Available Online USA, 2004
The Cryosphere, 10, 639–664, 2016 www.the-cryosphere.net/10/639/2016/ doi:10.5194/tc-10-639-2016 © Author(s) 2016. CC Attribution 3.0 License. Numerical simulations of the Cordilleran ice sheet through the last glacial cycle Julien Seguinot1,2,3, Irina Rogozhina3,4, Arjen P. Stroeven2, Martin Margold2, and Johan Kleman2 1Laboratory of Hydraulics, Hydrology and Glaciology, ETH Zürich, Zürich, Switzerland 2Department of Physical Geography and the Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden 3Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Potsdam, Germany 4Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany Correspondence to: Julien Seguinot ([email protected]) Received: 21 June 2015 – Published in The Cryosphere Discuss.: 7 August 2015 Revised: 2 February 2016 – Accepted: 19 February 2016 – Published: 16 March 2016 Abstract. After more than a century of geological research, 1 Introduction the Cordilleran ice sheet of North America remains among the least understood in terms of its former extent, volume, and dynamics. Because of the mountainous topography on During the last glacial cycle, glaciers and ice caps of the which the ice sheet formed, geological studies have often had North American Cordillera have been more extensive than only local or regional relevance and shown such a complexity today. At the Last Glacial Maximum (LGM), a continuous that ice-sheet-wide spatial reconstructions of advance and re- blanket of ice, the Cordilleran ice sheet (Dawson, 1888), treat patterns are lacking. Here we use a numerical ice sheet stretched from the Alaska Range in the north to the North model calibrated against field-based evidence to attempt a Cascades in the south (Fig.1). -
A Freshwater Classification of the Mackenzie River Basin
A Freshwater Classification of the Mackenzie River Basin Mike Palmer, Jonathan Higgins and Evelyn Gah Abstract The NWT Protected Areas Strategy (NWT-PAS) aims to protect special natural and cultural areas and core representative areas within each ecoregion of the NWT to help protect the NWT’s biodiversity and cultural landscapes. To date the NWT-PAS has focused its efforts primarily on terrestrial biodiversity, and has identified areas, which capture only limited aspects of freshwater biodiversity and the ecological processes necessary to sustain it. However, freshwater is a critical ecological component and physical force in the NWT. To evaluate to what extent freshwater biodiversity is represented within protected areas, the NWT-PAS Science Team completed a spatially comprehensive freshwater classification to represent broad ecological and environmental patterns. In conservation science, the underlying idea of using ecosystems, often referred to as the coarse-filter, is that by protecting the environmental features and patterns that are representative of a region, most species and natural communities, and the ecological processes that support them, will also be protected. In areas such as the NWT where species data are sparse, the coarse-filter approach is the primary tool for representing biodiversity in regional conservation planning. The classification includes the Mackenzie River Basin and several watersheds in the adjacent Queen Elizabeth drainage basin so as to cover the ecoregions identified in the NWT-PAS Mackenzie Valley Five-Year Action Plan (NWT PAS Secretariat 2003). The approach taken is a simplified version of the hierarchical classification methods outlined by Higgins and others (2005) by using abiotic attributes to characterize the dominant regional environmental patterns that influence freshwater ecosystem characteristics, and their ecological patterns and processes. -
Ross River Landscape Hazards
Ross River Landscape Hazards Geoscience Mapping for Climate Change Adaptation Planning This publication may be obtained from: Northern Climate ExChange Yukon Research Centre, Yukon College 500 College Drive P.O. Box 2799 Whitehorse, Yukon Y1A 5K4 867.668.8895 1.800.661.0504 yukoncollege.yk.ca/research Recommended citation: Benkert, B.E., Fortier, D., Lipovsky, P., Lewkowicz, A., de Grandpré, I., Grandmont, K., Turner, D., Laxton, S., Moote, K., and Roy, L.-P., 2015. Ross River Landscape Hazards: Geoscience Mapping for Climate Change Adaptation Planning. Northern Climate ExChange, Yukon Research Centre, Yukon College. 116 p. and 2 maps. Front cover photograph: Aerial view of the community of Ross River looking southeast. Photo credit: Yukon Geological Survey Disclaimer: The report including any associated maps, tables and figures (the “Information”) convey general observations only. The Information is based on an interpretation and extrapolation of discrete data points and is not necessarily indicative of actual conditions at any location. The Information cannot be used or relied upon for design or construction at any location without first conducting site-specific geotechnical investigations by a qualified geotechnical engineer to determine the actual conditions at a specific location (“Site-Specific Investigations”). The Information should only be used or relied upon asa guide to compare locations under consideration for such Site-Specific Investigations. Use of or reliance upon the Information for any other purpose is solely at the user’s own risk. Yukon College and the individual authors and contributors to the Information accept no liability for any loss or damage arising from the use of the Information. -
CENSUS for the SOUTH NAHANNI MOUNTAIN CARIBOU HERD, September 2001
CENSUS FOR THE SOUTH NAHANNI MOUNTAIN CARIBOU HERD, September 2001 Anne Gunn, Rick Farnell*, Jan Adamczewski*, Judy Dragon and Loralee Laberge* Department of Resources, Wildlife & Economic Development Government of the Northwest Territories Yellowknife, NT 2002 Manuscript Report No. 147 The contents of this paper are the sole responsibility of the authors. * Government of Yukon, Box 194, Watson Lake, Yukon Y0A 1C0 ii ABSTRACT The Nahanni herd of woodland caribou has a main wintering area largely within Nahanni National Park and a cross-border summer-fall range near the Tungsten mine in the southern Mackenzie Mountains. Studies by Parks Canada biologists had defined the herd’s seasonal ranges from standard VHF radio-collars and fall composition surveys in the mid to late 1990’s, but the herd’s size had not been previously estimated. Relatively low fall calf:cow ratios and increased hunter access had led to concerns about the sustainability of the harvest from both sides of the territorial border. In late September 2001, we carried out a helicopter-based census-survey of this caribou herd, with joint funding from the NWT, Parks Canada and Yukon. We counted 781 caribou and estimated herd size as 940 –1140 caribou based on a sightability correction derived from radio- collared caribou. Some questions remain about how distinct this herd’s distribution is as overlap with neighbouring herds occurs in winter. The calf:cow ratio was 10:100, well below recruitment needed to balance natural mortality. However the survey was during the rut when the radio-collared cows showed high fidelity to the mountain plateaux, which increases the repeatability of the census. -
Nahanni National Park Reserve of Canada
NAHANNI NATIONAL PARK RESERVE OF CANADA Nah§ Dehé Management Plan April, 2004 Foreword Canada’s national parks, national historic sites and national marine conservation areas represent the soul of Canada. They are a central part of who we are and what we are. They are places of magic and wonder and heritage. Each tells its own story. Together, they connect Canadians to our roots, to our future and to each other. What we cherish as part of our national identity, we also recognize as part of our national responsibility. All Canadians share the obligation to preserve and protect Canada’s unique cultural and natural heritage. Together, we hold our national parks, national historic sites and national marine conservation areas in trust for the benefit of this and future generations. To achieve this, practical action grounded in long-term thinking is needed. These principles form the foundation of the new management plan for Nahanni National Park of Canada. May I offer my deep appreciation to the vast range of thoughtful Canadians who helped forge this plan. I am especially grateful to our very dedicated team from Parks Canada and to all those local organizations and individuals who have demonstrated such good will, hard work, spirit of co-operation and extraordinary sense of stewardship. In that same spirit of partnership and responsibility, I am pleased to approve the Nahanni National Park of Canada Management Plan. David Anderson Minister of the Environment - i - Recommendation Statement Nahanni National Park Reserve of Canada Management -
Quaternary Geology of Howard's Pass And
QUATERNARY GEOLOGY OF HOWARD’S PASS AND APPLICATIONS TO DRIFT PROSPECTING by Derek G. Turner B.Sc., University of Victoria, 2005 THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE In the Department of Earth Sciences © Derek G. Turner, 2008 SIMON FRASER UNIVERSITY Fall, 2008 All rights reserved. This work may not be reproduced in whole or in part, by photocopy or other means, without permission of the author. APPROVAL Name: Derek Glen Turner Degree: Master of Science Title of Thesis: Quaternary Geology of Howard’s Pass and Applications to Drift Prospecting Examining Committee: Chair: Dr. James A. MacEachern Associate Professor of Earth Sciences ______________________________________ Dr. Brent C. Ward Senior Supervisor Associate Professor of Earth Sciences ______________________________________ Mr. Jeffery D. Bond Supervisor Surficial Geologist, Yukon Geological Survey ______________________________________ Dr. Lionel E. Jackson Jr. Supervisor Quaternary Geologist, Geological Survey of Canada ______________________________________ Dr. Victor M. Levson External Examiner Quaternary Geologist, British Columbia Ministry of Energy, Mines and Petroleum Resources Date Defended/Approved: August 6th, 2008 _________________________ ii ABSTRACT The Quaternary geology of Howard’s Pass was studied by creating a 1:50 000- scale terrain inventory map of the area and examining the ice-flow history of the region. Four stages of ice flow occurred in Howard’s Pass during the late Wisconsinan McConnell glaciation. The first stage is marked by ice growth from local cirques. During the second stage, an ice divide developed east of the Nahanni River, with ice flowing southwest across Howard’s Pass. During continued ice sheet growth in stage 3, the ice divide either migrated or a second divide grew to the southwest in the Logan Mountains and ice flowed northward across the study area. -
View: Local and Traditional Knowledge in the Liard River Watershed
Literature Review: Local and Traditional Knowledge in the Liard River Watershed Literature Review Local and Traditional Knowledge In the Liard River Watershed ______________________________________ Brenda Parlee I i Parlee, B. ©2019 Tracking Change Project, University of Alberta. All rights reserved. Compiled October 2016. ii Literature Review: Local and Traditional Knowledge in the Liard River Watershed TABLE OF CONTENTS Table of Contents ......................................................................................................................... iii Tables and Figures .................................................................................................................................... iv Summary Points ............................................................................................................................ 1 Introduction ................................................................................................................................... 3 The Liard River Basin ............................................................................................................................... 3 Methods .......................................................................................................................................... 3 Searching for Secondary Sources of Publicly Available Traditional Knowledge ................ 3 Oral Histories ........................................................................................................................................ -
The Weather of the Yukon, Northwest Territories and Western Nunavut Graphic Area Forecast 35
YUKON-E05 11/12/05 10:03 PM Page 3 TheThe WeatheWeather ooff tthehe Yukon,Yukon, NNorthwestorthwest TTerritorieserritories andand WesterWestern NunavutNunavut GraphicGraphic AreaArea ForecastForecast 3355 YUKON-E05 11/12/05 10:03 PM Page i TheThe WeatheWeather ofof tthehe Yukon,Yukon, NNorthwestorthwest TTerritorieserritories andand WesterWestern NunavutNunavut GraphicGraphic AreaArea ForecastForecast 3535 by Ross Klock Ed Hudson David Aihoshi John Mullock YUKON-E05 11/12/05 10:03 PM Page ii Copyright Copyright © 2001 NAV CANADA. All rights reserved. No part of this document may be reproduced in any form, including photocopying or transmission electronically to any computer, without prior written consent of NAV CANADA. The information contained in this document is confidential and proprietary to NAV CANADA and may not be used or disclosed except as expressly authorized in writing by NAV CANADA. Trademarks Product names mentioned in this document may be trademarks or registered trademarks of their respective companies and are hereby acknowledged. Relief Maps Copyright © 2000. Government of Canada with permission from Natural Resources Canada Design and illustration by Ideas in Motion Kelowna, British Columbia ph: (250) 717-5937 [email protected] YUKON-E05 11/12/05 10:03 PM Page iii LAKP-Yukon, NWT, Nunavut iii The Weather of the Yukon, Northwest Territories and Western Nunavut Graphic Area Forecast 35 Preface For NAV CANADA’s Flight Service Specialists (FSS), providing weather briefin- gs to help pilots navigate through the day-to-day fluctuations in the weather is a crit- ical role. While available weather products are becoming increasingly more sophisti- cated and at the same time more easily understood, an understanding of local and regional climatological patterns is essential to the effective performance of this role. -
The Northern Transportation Systems Assessment
THE NORTHERN TRANSPORTATION SYSTEMS ASSESSMENT Phase 1 Report Northern Transportation Demand Assessment June 2010 NORTHERN TRANSPORTATION SYSTEMS ASSESSMENT PAGE 2 PROLOG /EBA PHASE 1 REPORT : TRANSPORTATION DEMAND ASSESSMENT THE NORTHERN TRANSPORTATION SYSTEMS ASSESSMENT Phase 1 Report Northern Transportation Demand Assessment Submitted to Transport Canada Submitted by PROLOG Canada Inc. In Association with EBA Engineering Consultants Ltd. June 2010 PROLOG /EBA PAGE 3 NORTHERN TRANSPORTATION SYSTEMS ASSESSMENT PAGE 4 PROLOG /EBA PHASE 1 REPORT : TRANSPORTATION DEMAND ASSESSMENT NORTHERN TRANSPORTATION SYSTEMS ASSESSMENT Phase 1 Report Northern Transportation Demand Assessment Table of Contents 1. Introduction and Summary .............................................................. 7 2. Contemporary Transportation Systems Demand .................................. 11 2.1 Sealift Systems Demand .......................................................................................................... 13 2.1.1 Eastern Dry Cargo System ............................................................................................ 15 2.1.2 Eastern Fuel Supply System ......................................................................................... 20 2.1.3 Western Sealift System ................................................................................................. 24 2.2 Intermodal Systems Demand ................................................................................................. 31 2.2.1 Mackenzie Intermodal System