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Dating Early and Middle (Reid) Pleistocene Glaciations in Central Yukon by Tephrochronology

Published online by Cambridge University Press:  20 January 2017

John A. Westgate ,
Shari J. Preece ,
Duane G. Froese ,
Robert C. Walter ,
Amanjit S. Sandhu  and
Charles E. Schweger
John A. Westgate
Affiliation:
Physical Sciences Division, University of Toronto at Scarborough, 1265 Military Trail, Scarborough, Ontario, M1C 1A4, [email protected]
Shari J. Preece
Affiliation:
Physical Sciences Division, University of Toronto at Scarborough, 1265 Military Trail, Scarborough, Ontario, M1C 1A4, [email protected]
Duane G. Froese
Affiliation:
Department of Geography, University of Calgary, Calgary, Alberta, T2N 1N4, Canada
Robert C. Walter
Affiliation:
Physical Sciences Division, University of Toronto at Scarborough, 1265 Military Trail, Scarborough, Ontario, M1C 1A4, Canada
Amanjit S. Sandhu
Affiliation:
Physical Sciences Division, University of Toronto at Scarborough, 1265 Military Trail, Scarborough, Ontario, M1C 1A4, Canada
Charles E. Schweger
Affiliation:
Department of Anthropology, University of Alberta, Edmonton, Alberta, T6G 2E3, Canada
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Abstract

The late Cenozoic deposits of central Yukon contain numerous distal tephra beds, derived from vents in the Wrangell Mountains and Aleutian arc–Alaska Peninsula region. We use a few of these tephra beds to gain a better understanding on the timing of extensive Pleistocene glaciations that affected this area. Exposures at Fort Selkirk show that the Cordilleran Ice Sheet advanced close to the outer limit of glaciation about 1.5 myr ago. At the Midnight Dome Terrace, near Dawson City, exposed outwash gravel, aeolian sand, and loess, related to valley glaciers in the adjacent Ogilvie Mountains, are of the same age. Reid glacial deposits at Ash Bend on the Stewart River are older than oxygen isotope stage (OIS) 6 and likely of OIS 8 age, that is, about 250,000 yr B.P. Supporting evidence for this chronology comes from major peaks in the rates of terrigeneous sediment input into the Gulf of Alaska at 1.5 and 0.25 myr B.P.

Keywords

glass-fission-track datingYukonlate CenozoicReid Glaciationbasalt flowsmagnetostratigraphyinterglacial bedsMosquito Gulch tephraMidnight Dome tephraSheep Creek tephraFort Selkirk tephra
Type
Research Article
Information
Quaternary Research , Volume 56 , Issue 3 , November 2001 , pp. 335 - 348
Copyright
University of Washington

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References

Alloway, B.V., Pillans, B.J., Sandhu, A.S., and Westgate, J.A. Revision of the marine chronology in the Wanganui Basin, New Zealand, based on the isothermal fission-track dating of tephra horizons. Sedimentary Geology 82, (1993). 299 310.Google Scholar
Armentrout, J.M. Glacial lithofacies of the Neogene Yakataga Formation, Robinson Mountains, southern Alaska Coast Range, Alaska. Molnia, B.F. Glacial-Marine Sedimentation. (1983). Plenum, New York. 629 665.Google Scholar
Berger, G.W., Péwé, T.L., Westgate, J.A., and Preece, S.J. Age of Sheep Creek tephra (Pleistocene) in central Alaska from thermoluminescence dating of bracketing loess. Quaternary Research 45, (1996). 263 270.Google Scholar
Bigazzi, G., and Galbraith, R.F. Point-counting technique for fission-track dating of tephra glass shards, and its relative standard error. Quaternary Research 51, (1999). 67 73.Google Scholar
Bond, J.D. Late Cenozoic History of McQuesten Map Area, Yukon Territory, with Applications to Placer Gold Research. (1997). University of Alberta, Edmonton.Google Scholar
Bostock, H.S. Carmacks District, Yukon. (1936). Geological Survey of Canada, p. 189 Google Scholar
Bostock, H.S. Notes on Glaciation in Central Yukon Territory. (1966). CrossRefGoogle Scholar
Burn, C.R. Permafrost, tectonics, and past and future regional climate change, Yukon and adjacent Northwest Territories. Canadian Journal of Earth Sciences 31, (1994). 182 191.Google Scholar
Cande, S.C., and Kent, D.V. Revised calibration of the geomagnetic polarity timescale for the late Cretaceous and Cenozoic. Journal of Geophysical Research 100, (1995). 6093 6095.CrossRefGoogle Scholar
Desloges, J.R., and Church, M. Channel and floodplain facies in a wandering gravel-bed river. Ethridge, F.G., Flores, R.M., and Harvey, M.D. Recent Developments in Fluvial Sedimentology. (1987). 99 109.Google Scholar
Duk-Rodkin, A. (1996). Surficial Geology, Dawson, Yukon Territory. Geological Survey of Canada, Open File 3288, scale 1:250,000.Google Scholar
Duk-Rodkin, A. (1999). Glacial Limits Map of Yukon Territory. Geological Survey of Canada, Open File 3694, scale 1:1,000,000.Google Scholar
Duk-Rodkin, A., Barendregt, R.W., Tarnocai, C., and Phillips, F.M. Late Tertiary to late Quaternary record in the Mackenzie Mountains, Northwest Territories, Canada: Stratigraphy, paleosols, paleomagnetism, and chlorine-36. Canadian Journal of Earth Sciences 33, (1996). 875 895.Google Scholar
Ford, D.C. Evidences of multiple glaciation in South Nahanni National Park, Mackenzie Mountains, Northwest Territories. Canadian Journal of Earth Sciences 13, (1976). 1433 1445.Google Scholar
Francis, D., and Ludden, J. The mantle source for olivine nephelinite, basanite, and alkaline olivine basalt at Fort Selkirk, Yukon, Canada. Journal of Petrology 31, (1990). 371 400.Google Scholar
Froese, D.G., and Hein, F.J. Sedimentology of a high level terrace placer gold deposit. Lebarge, W.P. Yukon Quaternary Geology. (1996). Exploration and Geological Services Division, Whitehorse. 13 26.Google Scholar
Froese, D.G., Barendregt, R.W., Enkin, R.J., and Baker, J. Paleomagnetic evidence for multiple Late Pliocene—Early Pleistocene glaciations in the Klondike area, Yukon Territory. Canadian Journal of Earth Sciences 37, (2000). 863 877.Google Scholar
Gansecki, C.A., Mahood, G.A., and McWilliams, M. New ages for the climactic eruptions at Yellowstone: Single-crystal 40Ar/39Ar dating identifies contamination. Geology 26, (1998). 343 346.Google Scholar
Harmon, R.S., Ford, D.C., and Schwarcz, H.P. Interglacial chronology of the Rocky and Mackenzie Mountains based upon 230Th−234U dating of calcite speleothems. Canadian Jounal of Earth Sciences 14, (1977). 2543 2552.Google Scholar
Hughes, O. L. (1986). Quaternary chronology of Yukon Territory and western district of Mackenzie. in Correlation of Quaternary Deposits and Events around the Margin of the Beaufort Sea: Contributions from a joint Canadian-American Workshop, April 1984 Heginbottom, J. A. and Vincent, J-S, Eds., pp. 13–17. Geological Survey of Canada, Open File Report 1237.Google Scholar
Hughes, O. L, Campbell, R. B, Muller, J. E, and Wheeler, J. O. (1969). Glacial Limits and Flow Patterns, Yukon Territory. South of 65 Degrees North Latitude, Geological Survey of Canada, Paper 68-34.Google Scholar
Hughes, O.L., Harington, C.R., Schweger, C.E., Matthews, J.V. Jr. Ash Bend section. Morison, S.R., and Smith, C.A.S. Guidebook to Quaternary Research in Yukon. (1987). National Research Council of Canada, Ottawa. 50 53.Google Scholar
Hughes, O.L., Rutter, N.W., and Clague, J.J. Yukon Territory: Quaternary stratigraphy and history, Cordilleran Ice Sheet. Fulton, R.J. Quaternary Geology of Canada and Greenland. (1989). Geological Survey of Canada, Ottawa. 58 62.Google Scholar
Jackson, L.E. Jr. Pleistocene subglacial volcanism near Fort Selkirk, Yukon Territory. Current Research. (1989). p. 251–256.Google Scholar
Jackson, L.E. Jr., Barendregt, R.W., Irving, E., and Ward, B. Magnetostratigraphy of early to middle Pleistocene basalts and sediments, Fort Selkirk area, Yukon Territory. Current Research. (1990). p. 277–286.Google Scholar
Jackson, L.E. Jr., Barendregt, R.W., Baker, J., and Irving, E. Early Pleistocene volcanism and glaciation in central Yukon: A new chronology from field studies and paleomagnetism. Canadian Jounal of Earth Sciences 33, (1996). 904 916.Google Scholar
Jacobs, J.A. Reversals of the Earth's Magnetic Field. (1984). Adam Hilger Ltd, Bristol.Google Scholar
Klassen, R.W. The Tertiary-Pleistocene stratigraphy of the Liard Plain, southeastern Yukon Territory. (1987). Google Scholar
Martinson, D.G., Pisias, N.G., Hays, J.D., Imbrie, J., Moore, T.C., and Shackleton, N.J. Age dating and the orbital theory of the ice ages: Development of a high-resolution 0 to 300,000-year chronostratigraphy. Quaternary Research 27, (1987). 1 29.Google Scholar
Matthews, J.V. Jr., Schweger, C.E., and Hughes, O.L. Plant and insect fossils from the Mayo Village Section (central Yukon): New data on middle Wisconsinan environments and glaciation. Géographie physique et Quaternaire 44, (1990). 15 26.Google Scholar
Naeser, N.D., Westgate, J.A., Hughes, O.L., and Péwé, T.L. Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska. Canadian Journal of Earth Sciences 19, (1982). 2167 2178.Google Scholar
Oches, E.A., Banerjee, S.K., Solheid, P.A., and Frechen, M.A. High-resolution proxies of climate variability in the Alaskan loess record. Busacca, A. Dust Aerosols, Loess Soils and Global Change. (1998). Washington State University, College of Agriculture and Home Economics, 167 170.Google Scholar
Preece, S.J., Westgate, J.A., Alloway, B.V., and Milner, M.W. Characterization, identity, distribution, and source of late Cenozoic tephra beds in the Klondike district of the Yukon, Canada. Canadian Journal of Earth Sciences 37, (2000). 983 996.Google Scholar
Preece, S.J., Westgate, J.A., Stemper, B.A., and Péwé, T.L. Tephrochronology of late Cenozoic loess at Fairbanks, central Alaska. Geological Society of America Bulletin 111, (1999). 71 90.Google Scholar
Prueher, L.M., and Rea, D.K. Rapid onset of glacial conditions in the subarctic North Pacific region at 2.67 Ma: Clues to causality. Geology 26, (1998). 1027 1030.Google Scholar
Rea, D. K., and Snoeckx, H. (1995). Sediment fluxes in the Gulf of Alaska: Paleoceanographic record from Site 887 on the Patton-Murray Seamount Platform. in Proceedings of the Ocean Drilling Program, Scientific Results Rea, D. K., Basov, I. A., Scholl, D. W., and Allan, J. F., Eds., 145, 247–256. Ocean Drilling Program, College Station, Texas.Google Scholar
Sandhu, A.S., and Westgate, J.A. The correlation between reduction in fission-track diameter and areal track density in volcanic glass shards and its application in dating tephra beds. Earth and Planetary Science Letters 131, (1995). 289 299.Google Scholar
Sandhu, A.S., Westgate, J.A., and Alloway, B.V. Optimizing the isothermal plateau fission track dating method for volcanic glass shards. Nuclear Tracks 21, (1993). 479 488.Google Scholar
Sandhu, A.S., Westgate, J.A., Preece, S.J., and Froese, D.G. Glass-fission-track ages of late Cenozoic distal tephra beds in the Klondike district, Yukon Territory. Emond, D.S., and Weston, L.H. Yukon Exploration and Geology 2000. (2001). Exploration and Geological Services Division, Yukon. 247 256.Google Scholar
Schweger, C.E., White, J.M., and Froese, D.G. Preglacial and interglacial pollen records from central and northern Yukon: 3 Ma of forest history. Program and Abstracts, Canadian Quaternary Association Meeting. (1999). p. 67 Google Scholar
Seward, D., and Kohn, B.P. New zircon fission-track ages from New Zealand Quaternary tephra: An interlaboratory experiment and recommendations for the determination of young ages. Chemical Geology 141, (1997). 127 140.Google Scholar
Shackleton, N.J., Berger, A., and Peltier, W.R. An alternative astronomical calibration of the lower Pleistocene timescale based on ODP Site 677. Transactions of the Royal Society of Edinburgh, Earth Sciences 81, (1990). 251 261.CrossRefGoogle Scholar
Sinclair, P.D., Tempelman-Kluit, D.J., Medaris, L.G. Jr. Lherzolite nodules from a Pleistocene cinder cone in central Yukon. Canadian Journal of Earth Sciences 15, (1978). 220 226.Google Scholar
Smith, C.A.S., Tarnocai, C., and Hughes, O.L. Pedological investigations of Pleistocene glacial drift surfaces in the central Yukon. Géographie physique et Quaternaire 40, (1986). 29 37.Google Scholar
Staudacher, T.H., Jessberger, E.K., Dominik, B., Kirsten, T., and Schaeffer, O.A. 40Ar-39Ar ages of rocks and glasses from the Nördlinger Ries Crater and the temperature history of impact breccias. Journal Geophysics 51, (1982). 1 11.Google Scholar
Tarnocai, C., and Schweger, C.E. Late Tertiary and Early Pleistocene paleosols in northwestern Canada. Arctic 44, (1991). 1 11.Google Scholar
Tarnocai, C., Smith, S., and Hughes, O.L. Soil development on Quaternary deposits of various ages in central Yukon Territory. Current Research. (1985). p. 229–238.Google Scholar
Westgate, J.A. Isothermal plateau fission-track ages of hydrated glass shards from silicic tephra beds. Earth and Planetary Science Letters 95, (1989). 226 234.Google Scholar
Westgate, J.A., Sandhu, A.S., and Shane, P. Fission-track dating. Aitken, M., and Taylor, R.E. Chronometric and Allied Dating in Archaeology. (1997). Plenum, New York. 127 158.Google Scholar
Westgate, J.A., Preece, S.J., Kotler, E., and Hall, S. Dawson tephra: A prominent stratigraphic marker of Late Wisconsinan age in west-central Yukon, Canada. Canadian Journal of Earth Sciences 37, (2000). 621 627.Google Scholar
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