Derrick Hasterok

Graduate Student, Thermal Geophysics Group
Department of Geology and Geophysics
University of Utah
135 S 1460 E RM 709
Salt Lake City, Utah 84112, USA

PH: 1-801-581-3588
FAX: 1-801-581-7065
E-Mail: dhasterok.at.mines.utah.edu

"The present is the key to the past."
-James Hutton

Academic History

Currently pursuing a Ph.D. U of Utah
M.Sc. Geophysics, 2006, U of Utah
B.S. Geophysics, 2001, Caltech

Fellowships and Awards

Teaching Experience

Professional Societies

2000-Present American Geophysical Union (AGU)
2002-Present Geological Society of America (GSA)

Research Interests

Causes of Continental Elevation

Elevation of the continents varies widely from below sea level by nearly a kilometer on the continental shelves to the height of Mt. Everest above 9 km. Regional elevation variations can be separated into three separate contributing factors. 1: Variations in composition (density) and crustal thickness. 2: Steady-state thermal expansion due to heat content. And 3: Dynamic elevation resulting from mantle and surface processes and plate tectonics. My work involves quantifing the contributions of each of these factors to the continents.

Global Heat Flow

Heat flow determinations derived from borehole temperature measurements provide us with the most direct indicators of the lithospheric thermal structure. The Global Heat Flow database originally compiled by Alan Jessop at the Canadian Geologic Survey was last updated by Pollack et al. [1993]. Since Pollack et al.'s publication, more than 10,000 heat flow measurements have been collected. I have been working on compiling the more recent data as well as correcting errors in the previous versions of the database. Once complete, this new compilation will provide significantly greater coverage in India, South America and Africa, filling some previously large gaps.

Rift Related Melting

The compostion of the mantle appears to relatively heterogeneous. This includes regions of local enrichment (or pods) which may melt at significantly lower temperatures than the surrounding less depleted mantle. As rifting occurs, these pods may rise and decompress causing adiabatic expansion and melting if these pods rise high and quickly enough. By numerically modeling trajectories of these pods during rifting, one may record the pressure temperature history and predict the variety of melts that may form given the bulk composition.

Rifting of Stable Crust

Is the rifting of cratons a passive or an active process? What are the driving forces? To examine these end members, Phil Wannamaker and I have collected 38 broadband and 11+ long period magnetotelluric (MT) measurements in the Colorado Plateau/Basin and Range transition zone in central Utah. These sites extend a previously collected eastern Great Basin and Colorado Plateau lines, filling a crucial gap in knowledge of the geophysical characterization of the transition zone. Combining MT models with thermal evolution models of the plateau, we can test the active and passive rifting hypotheses.

Publications

Wannamaker, P.E., D.P. Hasterok, J.M. Johnston, J.A. Stodt, D.B. Hall, T.L. Sodergren, L. Pellerin, V. Maris, W.M. Doerner, and M.J. Unsworth, in prep., Lithospheric dismemberment and magmatic process of the Great Basin-Colorado Plateau Transition, Utah, implied from magnetotellurics Geochem. Geophys. Geosys.

Hasterok, D. and D.S. Chapman, 2007, Continental Thermal Isostasy I: Methods and Sensitivity J. Geophys. Res. 112, doi:10.1029/2006JB004663.

Hasterok, D. and D.S. Chapman, 2007, Continental Thermal Isostasy II: Applications to North America, J. Geophys. Res. 112, doi:10.1029/2006JB004664.

Hasterok, D., 2005, Thermal Isostasy on Continents: Applications to North America, Masters Thesis, University of Utah, 129pp.

Conference Abstracts

[Talk] Hasterok, D. and D.S. Chapman, 2007, INVITED A reference heat generation model for the continental lithosphere constrained by heat flow and elevation, Eos Trans. AGU, Fall Meeting Suppl., 88, T22B-04.

[Talk] D.S. Chapman and D. Hasterok, 2007, Thermal isostasy a new constraint for Heat Generation Models of the Continental Lithosphere, Eos Trans. AGU, Fall Meeting Suppl., 88, T22B-03.

[Poster] Hasterok, D., P.E. Wannamaker, D.S. Chapman and W. Doerner, 2007, Extension in the Colorado Plateau/Basin and Range Transition Zone, Central Utah: An active or Passive Process? Eos Trans. AGU, Fall Meeting Suppl., 88, T31C-0581.

[Talk] Hasterok, D., P.E. Wannamaker, D.S. Chapman and W. Doerner, 2007, Extension in the Colorado Plateau/Basin and Range Transition Zone, Central Utah: An active or Passive Process? GSA Abstracts with Programs, 39 (6), 278.

[Poster] Hasterok, D., P.E. Wannamaker, D.S. Chapman and W. Doerner, 2007, Rifting at the Edge of a Craton, the Great Basin--Colorado Plateau Transition Zone, GSA Penrose Conference Extending the Continental Lithosphere.

[Poster] Hasterok, D., 2007, Global Thermal Isostasy NSF Workshop on the Future of Marine Heat Flow.

[Poster] Hasterok, D. and D.S. Chapman, 2007, Composition and Thermal Contributions to the Elevation of North America National Earthscope Meeting, Monterrey, California.

[Poster] Hasterok, D. P.E. Wannamaker, D.S. Chapman and W. Doerner, 2007, Geotherms, Fluids, and Lithospheric Structure of the Colorado Plateau Transition Zone, 38N Latitude, National Earthscope Meeting, Monterrey, California.

[Poster] Hasterok, D. and D.S. Chapman, 2006, Heat Production and Elevation of the Southwestern United States. Eos Trans. AGU, Fall Meeting Suppl., 87, T43-1655.

[Talk] Wannamaker, P.E., D. Hasterok, 2006, , Eos Trans. AGU, ,

[Poster] Wannamaker, P.E., D. Hasterok, and , 2006 , EMIW

[Talk] Hasterok, D. and D.S. Chapman, 2006, Continental Thermal Isostasy: Application to Global Tectonic Provinces, IHFC 6th International Conference on Heat Flow and Structure of the Lithosphere.

[Poster] Hasterok, D. and D.S. Chapman, 2005, Continental Thermal Isostasy, Eos Trans. AGU, 86, T21C-0499.

Wannamaker, P.E., and W.M. Doerner and D.P. Hasterok, 2005, Upper mantle diapers, lower crustal magmatic underplating, and lithospheric dismemberment of the Great Basin and Colorado Plateau regions, Nevada and Utah; implications from deep MT resistivity surveying, Eos Trans. AGU, 86, GP41B-0875.

Hasterok, D., D.S. Chapman and R.N. Harris, 2005, Thermal isostasy and the elevation of the Continents IASPEI General Assembly, Santiago, Chile.

[Poster] Hasterok, D., D.S. Chapman and R.N. Harris, 2005, Thermal Isostasy and the Elevation of North America National EarthScope Meeting

[Poster] Hasterok, D., D.S. Chapman and R.N. Harris, 2004, Using Continental Elevation to Estimate Heat Production Distributions Eos Trans. AGU, 85, T43B-1324

Quesada, R., and G.R. Jiracek and D.L. Alumbaugh and D. Hasterok and L. Pellerin and G.R. Young, 2004, Joint Magnetotelluric-Transient Electromagnetic Imaging of Basin-Bounding Faulting in the Rio Grande Rift, New Mexico, Eos Trans. AGU, 85, GP11A-0823

Wannamaker, P.E., and D.P. Hasterok and J.M. Johnston and T.L. Sodergren and W.M. Doerner, 2004, Non-uniform Extensional Processes Influenced by Fluid and Melt Distributions Below the Great Basin-Colorado Plateau Transition Zone, Utah, Revealed Through Electrical Conductivity Structure, Eos Trans. AGU, 85, 2004 AGU Fall Meeting, T53D-06

[Poster] Hasterok, D., D.S. Chapman and R.N. Harris, 2004, Contributions to the Elevation of North America, Thermal Processes in the Context of EarthScope

[Poster] Hasterok, D., D.S. Chapman, and R.N. Harris, 2003, Contributions to the Elevation of North America, Eos Trans. AGU, 84 (47), T31E-0887.

Hasterok, D., and D.S. Chapman, 2003, Thermal Isostasy as a Tool for Analyzing Continental Dynamics, IUGG Meeting, Sapporo, Japan.

MacKnight, R.B., and A.T. Fisher, M. Hutnak, E. Silver, C. Stein, R. Harris, H. Deshon, D. Hasterok and C. Ellsworth, 2003, Patterns of Heat Loss and Hydrothermal Recharge and Discharge Within 20-24 Ma Seafloor Offshore of the Nicoya Peninsula, Costa Rica, From Collocated Thermal and Seismic Data, Eos Trans. AGU, 84 (47), T52B-0260

Doerner, W.M., P.E. Wannamaker, T.L. Sodergren, J.A. Stodt, D.P. Hasterok, and M.J. Unsworth, 2002, Resistivity Architecture and Physical State of the Great Basin: Separate and Joint Roles of Fluids and Graphite Eos Trans. AGU, 83 (47), GP52A-04.

Hasterok, D., T. Sodergren, P. Wannamaker, and M. Unsworth, 2002, 3-D MT modeling the Colorado Plateau and Great Basin, western United States, 16th EM Induction Workshop.

Quesada, R.M., C. Nettleton, C. Flescher, G. Jiracek, D. Alumbaugh, R. Bielinski, and D. Hasterok, 2002, Magnetotellurics reveals major Rio Grande Rift faulting in the Santa Fe, New Mexico area, USA, 16th EM Induction Workshop.

Baldridge, S.W., J.F. Ferguson, S.W. Braile, S. Biehler, G.R. Jiracek, B.E. Gilpin, D.L. Alumbaugh, D. Gratwick, T.L. Richards and D.P. Hasterok, 2001., Architecture of the southern Espanola Basin (Rio Grande Rift) and flank uplift adjacent to the La Bajada Fault, GSA Abstracts with Programs, 33 (5), 61.

Alumbaugh, David, G.R. Jiracek and D. Hasterok, 2000, One-, Two-, and Three-Dimensional Analysis of MT Data Collected Across the Transition Between the Espanola and Santa Domingo Basins, New Mexico, Eos Trans. AGU, 81 (48), GP51A-09.

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