TY - JOUR T1 - Active tectonics of the St. Elias orogen, Alaska, observed with GPS measurements JF - Journal of Geophysical Research: Solid Earth Y1 - 2013 A1 - Elliott, Julie A1 - Jeffrey T. Freymueller A1 - Chris F. Larsen KW - Alaska KW - geodesy KW - St. Elias orogen KW - tectonics KW - Yakutat block AB - We use data from campaign and continuous GPS sites in southeast and south central Alaska to constrain a regional tectonic block model for the St. Elias orogen. Active tectonic deformation in the orogen is dominated by the effects of the collision of the Yakutat block with southern Alaska. Our results indicate that  37 mm/yr of convergence is accommodated along a relatively narrow belt of N-NW dipping thrust faults in the eastern half of the orogen, with the present-day deformation front running through Icy Bay and beneath the Malaspina Glacier. Near the Bering Glacier, the collisional thrust fault regime transitions into a broad, northwest dipping décollement as the Yakutat block basement begins to subduct beneath the counterclockwise rotating Elias block. The location of this transition aligns with the Gulf of Alaska shear zone, implying that the Pacific plate is fragmenting in response to the Yakutat collision. Our model indicates that the Bering Glacier region is undergoing internal deformation and could correspond to the final stage of offscraping and accretion of sediments from the Yakutat block prior to subduction. Predicted block motions at the western edge of the orogen suggest that the crust is laterally escaping along the Aleutian fore arc. UR - http://dx.doi.org/10.1002/jgrb.50341 ER - TY - JOUR T1 - Gravity and uplift rates observed in southeast Alaska and their comparison with GIA model predictions JF - Journal of Geophysical Research Y1 - 2012 A1 - Tatsuru Sato A1 - Miura, S. A1 - Sun, W. A1 - Sugano, T. A1 - Jeffrey T. Freymueller A1 - Chris F. Larsen A1 - Ohta, Y. A1 - Fujimoto, H. A1 - Inazu, D. A1 - Roman J. Motyka VL - 117 ER - TY - JOUR T1 - Reevaluation of the viscoelastic and elastic responses to the past and present-day ice changes in Southeast Alaska JF - Tectonophysics Y1 - 2011 A1 - Tatsuru Sato A1 - Chris F. Larsen A1 - Miura, S. A1 - Ohta, Y. A1 - Fujimoto, H. A1 - Sun, W. A1 - Roman J. Motyka A1 - Jeffrey T. Freymueller VL - 511 ER - TY - JOUR T1 - Gravity measurements in southeastern Alaska reveal negative gravity rate of change caused by glacial isostatic adjustment JF - Journal of Geophysical Research Y1 - 2010 A1 - Sun, W. A1 - Miura, S. A1 - Tatsuru Sato A1 - Sugano, T. A1 - Jeffrey T. Freymueller A1 - Kaufman, M. A1 - Chris F. Larsen A1 - Cross, R. A1 - Inazu, D. VL - 115 ER - TY - JOUR T1 - Tectonic block motion and glacial isostatic adjustment in southeast Alaska and adjacent Canada constrained by GPS measurements JF - Journal of Geophysical Research Y1 - 2010 A1 - Elliott, J.L. A1 - Chris F. Larsen A1 - Jeffrey T. Freymueller A1 - Roman J. Motyka VL - 115 ER - TY - JOUR T1 - Earth tides observed by gravity and GPS in southeastern Alaska JF - Journal of Geodynamics Y1 - 2008 A1 - Tatsuru Sato A1 - Miura, S. A1 - Ohta, Y. A1 - Fujimoto, H. A1 - Sun, W. A1 - Chris F. Larsen A1 - Heavner, M. A1 - Kaufman, AM A1 - Jeffrey T. Freymueller VL - 46 ER - TY - JOUR T1 - Post Little Ice Age Glacial Rebound in Glacier Bay National Park and Surrounding Areas JF - Alaska Park Science Y1 - 2007 A1 - Roman J. Motyka A1 - Chris F. Larsen A1 - Jeffrey T. Freymueller A1 - Echelmeyer, K.A. VL - 6 ER -