Year of Award
Master of Science (MS)
Other Degree Name/Area of Focus
Department or School/College
Department of Geosciences
James Sears, Michael Stickney
GPS geodesy, fault slip, crustal velocity, kinematics
University of Montana
Geology | Geophysics and Seismology | Tectonics and Structure
We derive surface velocities relative to North America, using data from 1989 through 2014 in the interior northwest, to investigate kinematics from the Snake River Plain (SRP) to the Canadian border. The Centennial Tectonic Belt (CTB) exhibits similarities to the main Basin and Range Province (BRP) that suggest the CTB is an extension of the BRP, including range and fault orientation, increasing velocity magnitudes westward, and a distinct high rate of strain across the Madison Range. Calculations of fault spreading rates and orientations from geodetic data show that several faults are more active than previously assumed when compared to seismic and paleoseismic rates, while structural and geomorphic rates do not exhibit consistent correlation. The northern section of the Madison Fault was previously estimated to be spreading less than 0.2 mm y-1, however we derived a rate of 1.2 mm y-1 from geodetic data constraining nearly half of the CTB spreading rate of 2.6 mm y-1 to the Madison Fault. Comparing the mean velocity of the CTB to that of the SRP we find a dextral slip of 0.9 mm y-1.
Schmeelk, Dylan, "KINEMATIC CONSTRAINTS ON TECTONICS OF THE NORTHERN BASIN AND RANGE" (2016). Graduate Student Theses, Dissertations, & Professional Papers. 10799.
© Copyright 2016 Dylan Schmeelk