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Ice surface velocity patterns on Seward Glacier, Alaska/Yukon, and their implications for regional tectonics in the Saint Elias Mountains

  • Andrew L.J. Ford (a1), Richard R. Forster (a1) and Ronald L. Bruhn (a2)

Abstract

Seward Glacier, on the Alaskan/Yukon border along the Gulf of Alaska, sits atop an important structural and morphological junction in the Saint Elias orogen. It is situated at the intersection between the Fairweather and Bagley strike–slip faults, and in the hanging wall of the Malaspina and Chugach–Saint Elias thrust faults. An ice surface velocity map of Seward Glacier derived from interferometric synthetic aperture (InSAR) reveals a complex flow pattern, which implies there is a previously unmapped northwest-trending supra-/subsurface ridge crossing the Seward. Analysis of additional remote-sensing images, ASTER, ERS SAR and the InSAR coherence map, confirms this observation. The presence of this ridge leads to a set of tectonic models describing the possible interaction of the underlying faults.

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References

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Allen, C. R. and Smith, G. I.. 1953. Seismic and gravity investigation son the Malaspina Glacier, Alaska. Transactions, American Geophysical Union,34(5),755760.
Dusel-Bacon, C., Csejtey, J. R., Forster, H. L., Doyle, G. O., Nokleberg, W. J. and Plafker, G.. 1994. Distribution, facies, ages and proposed tectonic associations of regionally metamorphosed rocks in east and south-central Alaska. U.S. Geol. Su Rv. Prof. Pap. 1497-C.
Estabrook, C. H., Nabelek, J. L. and Lemer-Lam, A. L..1992. Tectonicmodel of the Pacific–North American plate boundary in the Gulf of Alaska from broadband analysis for the 1979 St. Elias, Alaska, earthquake and its aftershocks. J. Geophys. Res., 97(B5), 65876612.
Fatland, D.R. and Lingle, C. S.. 1998. Analysis of the 1993–95 Bering Glacier (Alaska) surge using differential SAR interferometry. J. Glaciol., 44(148), 532546.
Fletcher, H.J. and Freymueller, I.T.. 1999. New GPS constraints on the motion of theYakutat Block. Geophys. Res. Lett., 26(19), 30293032.
Goldstein, R. M., Engelhardt, H., Kamb, B. and Frolich, R. M.. 1993. Satellite radar interferometry for monitoring ice sheet motion: application to an Antarctic ice stream. Science, 262(5139),15251530.
Gustavson, T.C. and Boothroyd, J. C.. 1987. Adepositional model for outwash, sediment sources, and hydrologic characteristics, Malaspina Glacier, Alaska: a modern analog of the southeastern margin of the Laurentide ice sheet. Geol. Soc. Am. Bull., 99(2),187200.
Jaeger, J. and 8 others. 2001. Orogenic and glacial research in pristine southern Alaska. Eos, 82(19), 213, 216.
Joughin, I., Kwok, R. and Fahnestock, M.. 1996. Estimation of ice-sheet motion using satellite radar interferometry: method and error analysis with application to Humboldt Glacier, Greenland. J. Glaciol.,42(142), 564575.
Joughin, I. R., Kwok, R. and Fahnestock, M. A.. 1998. Interferometric estimation of three-dimensional ice-flow using ascending and descending passes. Ieee Trans. Geosci. Remote Sensing, GE-36(1), 2537.
Kwok, R. and Fahnestock, M. A.. 1996. Ice sheet motion and topography from radar interferometry. Ieee Trans. Geosci. Remote Sensing, GE-34(1),189200
MacGregor, K. R., Anderson, R. S., Anderson, S. P. and Waddington, E. D.. 2000. Numerical simulations of glacial-valley longitudinal profile evolution. Geology, 28(11),10311034.
Meigs, A. and Sauber, J.. 2000. Southern Alaska as an example of the longterm consequences of mountain building under the influence of glaciers. Quat. Sci. Rev., 19(14–15),15431562.
Merrand, Y. and Hallet, B.. 2000. Glacial landscapes evolution in sub-polar regions: an integrated field and theoretical study to model the evolution of the Chugach–St. Elias mountains, southern Alaska. [Abstract.] Eos, 81(48), Fall Meeting Supplement, F1072.
Molnia, B. F. and Jones, J. E.. 1989. View through the ice: areunusual airborne radar backscatter features from the surface of the Malaspina Glacier, Alaska, expressions of subglacial morphology? Eos,70(28),701, 710.
Page, R. A. 1969. Late Cenozoic movement on the Fairweather fault in southeast Alaska. Geol. Soc. Am. Bull., 80(θ), 18731878.
Plafker, G. 1987. Regional geology and petroleum potential of the northern Gulf of Alaska continental margin. in Scholl, D.W., Grantz, A. and Vedder, J. G., eds. Geology and Resource Potential of The Continental Margin of Western North America and Adjacent Ocean Basins. Houston, TX, Circum-Pacific Council for Energy and Mineral Resources, 229268. (Earth Science Series 6.)
Plafker, G., Moore, J. C. and Winkler, G. R.. 1994. Geology of the southern Alaska margin. in Plafker, G. and Berg, H. C., eds. Quaternary Geology of Alaska. Boulder, CO, Geological Society of America, 389449. (The Geology of North America G-1.)
Rignot, E., Forster, R. and Isacks, B.. 1996. Interferometric radar observations of Glaciar San Rafael, Chile. J. Glaciol., 42(141), 279291. (Erratum: 42(142), p. 591.)
Sauber, J., McClusky, S. and King, R.. 1997. Relation of ongoing deformation rates to subduction zone processes in southern Alaska. Geophys. Res. Lett., 24(22), 28532856.
Sauber, J., Plafker, G., Molnia, B. F. and Bryant, M. A.. 2000. Crustal deformation associated with glacial fluctuations in the eastern Chugach Mountains, Alaska. J. Geophys. Res.,105(B4), 80558077.
Savage, J.C. and Lisowski, M.. 1986. Strain accumulation in the Yakataga seismic gap, southern Alaska. J. Geophys. Res., 91(9), 94939506.
Sharp, R. P. 1958. MalaspinaGlacier, Alaska. Geol. Soc. Am. Bull.,69(2), 617646.
Tarr, R.S. and Martin, L.. 1912. The earthquakes at Yakutat Bay, Alaska, in September, 1899. U. S. Geol. Surv. Prof. Pap. 69.
Ulaby, F.T., Moore, R. K. and Fung, A. K.. 1982. Microwave Remote Sensing, Active and Passive. Vol. 2. Radar Remote Sensing and Surface Scattering and Emission Reading, MA, Addison-Wesley Publishing Co.
Zebker, H. A., Rosen, P., Hensley, S. and Mouginis-Mark, P. J..1996. Analysis of active lava flows on Kilauea volcano, Hawaii, using SIR-C radar correlation measurements. Geology, 24(6), 495498.
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Annals of Glaciology
  • ISSN: 0260-3055
  • EISSN: 1727-5644
  • URL: /core/journals/annals-of-glaciology
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