Mahan group publications


Baird, G.B., Grover, T.W., Mahan, K.H., Raschke, M.B., Frothingham, M.G., Möller, A., Chumley, A.S., Hooker, J.C., Kelly, N.M., and Allaz, J.M., In Press, Paleoproterozoic tectonics in the Northern Colorado Front Range, GSA Field Guides,

Sui, S., Shen, W., Mahan, K.H., and Schulte-Pelkum, V., In Press, Seismologically constrained crustal composition of the continental U.S., GSA Bulletin.

Frothingham, M., Schulte-Pelkum, V., Mahan, K.H., Merschat, A., Mather, M., and Cabrera, Z., In Press, Don’t judge an orogen by its cover: Kinematics of the Appalachian Decollement from seismic anisotropy, Geology.

Dumond, G., Mahan, K.H., Goncalves, P., Williams, M.L., and Jercinovic, M.J., 2022, Monazite as a monitor of shear strain in orogenic crust, John G. Ramsay special issue in Journal of Structural Geology, v. 161,

Frothingham, M., Mahan, K.H., Schulte-Pelkum, V., and Caine, J.S., 2022, From crystals to crustal-scale seismic anisotropy: Bridging the gap between rocks and seismic studies with digital geologic map data in Colorado, Tectonics, v. 41, e2021TC006893,


Provow, A.W. , Newell, D.L., Dehler, C.M., Ault, A.K. Yonkee, W.A., Thomson, S.N., and Mahan, K.H., 2021, Revised maximum depositional age for the Ediacaran Browns Hole Formation: Implications for western Laurentia Neoproterozoic stratigraphy, Lithosphere,

Mahan, K.H., Frothingham, M., and Alexander, E., 2021, Virtual mapping and analytical data integration: A teaching module using Precambrian crystalline basement in Colorado’s Front Range (USA), Special issue on Virtual Geological Education Resources, Geoscience Communication and Solid Earth,

Leydier, T., Goncalves, P., Albaric, J., LeClere, H., Mahan, K.H., and Faulkner, D., 2021, Seismic properties across an amphibolite- to greenschist-facies strain gradient (Neves area, eastern Alps, Italy): new considerations for shear zone imaging, Tectonophysics. v. 816,


Orlandini, O.F. and Mahan, K.H., 2020, Rheological evolution of a pseudotachylyte-bearing deep crustal shear zone in the western Canadian Shield, Journal of Structural Geology, v. 141, doi:10.1016/j.jsg.2020.104188.


Orlandini, O.F., Mahan, K.H., Williams, M.L., Regan, S.P., and Mueller, K., 2019, Evidence for deep crustal seismic rupture in a granulite-facies intraplate strike-slip shear zone, northern Saskatchewan, Canada, Geological Society of America Bulletin, doi:10.1130/B31922.1.


Levandowski, W., Jones, C., Butcher, L.A., and Mahan, K.H., 2018, Lithospheric density models reveal evidence  for Cenozoic uplift of the Colorado Plateau and Great Plains by lower crustal hydration, Geosphere, v. 14doi:10.1130/GES01619.1. 

Condit, C.B., Mahan, K.H., Curtis, K.C., and Möller, A., 2018, Dating metasomatism: monazite and zircon growth during amphibolite-facies albitization, Minerals, Special Issue on “Application of Electron Microprobe Methods in Trace Element Analysis and Geochronology”, v. 8, doi:10.3390/min8050187.

Condit, C.B. and Mahan, K.H., 2018, Fracturing, fluid flow, and shear zone development: relationship between chemical and mechanical processes in Proterozoic mafic dikes from southwestern Montana, USA, Journal of Metamorphic Geology, v. 36, p. 195-223, doi: 10.1111/jmg.12289.


Brownlee, S., Schulte-Pelkum, V., Raju, A., Mahan, K.H., Condit, C., and Orlandini, O.F., 2017, Characteristics of deep crustal seismic anisotropy from a compilation of rock elasticity tensors and their expression in receiver functions, Tectonics, v. 36, doi: 10.1002/2017TC004625, also featured in EOS. 

Regan, S.P., Williams, M.L., Chiarenzelli, J.R., Grohn, L., Mahan, K.H., and Gallagher, M., 2017, A paired U-Pb and Hf in zircon transect across the south-central Snowbird Tectonic Zone, western Churchill Province: implications for Neoarchean continuity across the Rae-Hearne boundary, northern Saskatchewan, Precambrian Research, v. 300, p. 201-222. 

Schulte-Pelkum, V., Mahan, K.H., Shen, W., and Stachnik, J., 2017, The distribution and composition of high-velocity lower crust across the continental U.S: comparison of seismic and xenolith data and implications for lithospheric dynamics and history, Tectonics, v. 36, doi: 10.1002/2017TC004480, received Editor’s Highlight. 

Williams, M.L., Jercinovic, M.J., Mahan, K.H., and Dumond, G., 2017, Electron Microprobe Petrochronology, Reviews in Mineralogy and Geochemistry, MSA, v. 83, DOI: 10.2138/rmg.2017.83.5. 

Regan, S., Williams, M.L., Mahan, K., Dumond, G., Jercinovic, M., and Orlandini, O., 2017, Neoarchean arc magmatism and subsequent collisional orogenesis along the eastern Rae domain, western Churchill Province: Implications for the early growth of Laurentia, Precambrian Research, v. 294, p. 151-174, doi: 10.1016/j.precamres.2017.03.010. 

Butcher, L.A., Mahan, K.H., and Allaz, J.M., 2017, Late Cretaceous to Paleocene crustal hydration in the Colorado Plateau, USA, from xenolith petrology and monazite geochronology, Lithosphere, doi:10.1130/L583.1. 

Johnson, J.E., Flowers, R.M., Baird, G. and Mahan, K.H., 2017, Inverted zircon and apatite (U-Th)/He dates from the Front Range, Colorado: High-damage zircon as a low temperature (<50°C) thermochronometer, Earth and Planetary Science Letters, v. 466, p. 80-90, doi:10.1016/j.epsl.2017.03.002. 


Condit, C.B., Mahan, K.H., Ault, A., and Flowers, R.M., 2015, Foreland propagation of high-grade tectonism in the deep roots of a Paleoproterozoic collisional orogen, SW Montana, USA, Lithosphere, v. 7, p. 625-645, doi:10.1130/L460.1. 

Jones, C., Mahan, K.H., Butcher, L., Levandowski, W., and Farmer, G.L., 2015, Continental uplift through crustal hydration, Geology, v. 43, p. 355-358, doi:10.1130/G36509.1.

Leslie, S.R., Mahan, K.H., Regan, S., Williams, M.L., and Dumond, G., 2015, Contrasts in sillimanite deformation in felsic tectonites from anhydrous granulite- and hydrous amphibolite-facies shear zones, western Canadian Shield, Journal of Structural Geology, v. 71, p. 112-124, doi:10.1016/j.jsg.2014.12.002.


Regan, S.P., Williams, M.L., Leslie, S., Mahan, K.H., Jercinovic, M.J., and Holland, M.E., 2014, The Cora Lake shear zone, Athabasca granuilite terrane (Snowbird Tectonic Zone), an intraplate response to far-field orogenic processes during amalgamation of Laurentia, Canadian Journal of Earth Science, v. 51, p. 877-901, doi: 10.1139/cjes-2014-0015.

Johnson, J.E., West, D.P., Jr., Condit, C., and Mahan, K.H., 2014, The Spanish Creek mylonite: A zone of high strain in the northern Madison Range, SW Montana, Rocky Mountain Geologyv.49, p. 91-114, doi:10.2113/gsrocky.49.2.91.

Williams, M.L., Dumond, G., Mahan, K.H., Regan, S.P., Holland, M., 2014, Garnet-forming reactions in felsic orthogneiss: Implications for densification and strengthening of the lower continental crustEarth and Planetary Science Letters, v. 405, p. 207-219.

Schulte-Pelkum, V. and Mahan, K.H., 2014, Imaging faults and shear zones using receiver functions, PAGEOPH, Topical Volume on Crustal Fault Zones, DOI 10.1007/s00024-014-0853-4.

Schulte-Pelkum, V. and Mahan, K.H., 2014, A method for mapping crustal deformation and anisotropy with receiver functions and first results from USArrayEarth and Planetary Science Letters, v. 402, p. 221-233.


Dumond, G., Mahan, K.H., Williams, M.L., and Jercinovic, M.J., 2013, Transpressive uplift and exhumation of continental lower crust revealed by syn-kinematic monazite reactions, Lithosphere, doi: 10.1130/L292.1.

Mahan, K.H., Allaz, J.M., Baird, G.B., and Kelly, N.M., 2013, Proterozoic metamorphism and deformation in the northern Colorado Front Range, in Abbott, L.D., and Hancock, G.S., eds., Classic Concepts and New Directions: Exploring 125 Years of GSA Discoveries in the Rocky Mountain Region, Geological Society of America Field Guide 33, p. 1-20, doi:10.1130/2013.0033(06).


Mahan, K.H., Schulte-Pelkum, V., Blackburn, T.J., Bowring, S.A., and Dudas, F.O., 2012, Seismic structure and lithospheric rheology from deep crustal xenoliths, central Montana, USA, Geochemistry Geophysics Geosystems, v. 13, Q10012, doi:10.1029/2012GC004332.

Bartley, J.M., Glazner, A.F., and Mahan, K.H., 2012, Formation of pluton roofs, floors, and walls by crack opening at Split Mountain, Sierra Nevada, California, Geosphere, v. 8, p. 1086-1103, doi:10.1130/GES00722.1.

Barnhart, K.R., Mahan, K.H., Blackburn, T.J., Bowring, S.A., and Dudas, F.O., 2012, Deep crustal xenoliths from central Montana: Implications for the timing and mechanisms of high-velocity lower crust formation. Geosphere, First published online November 16, 2012, doi: 10.1130/GES00765.1.

Ward, D., Mahan, K., and Schulte-Pelkum, V., 2012, Roles of quartz and mica in seismic anisotropy of mylonites, Geophysical Journal International, doi:10.1111/j.1365-246X.2012.05528.x.

Ault, A., Flowers, R.M., and Mahan, K.H., 2012, Quartz shielding of sub-20 um zircons from radiation damage-enhanced Pb loss: an example from a granulite facies mafic dike, northwestern Wyoming craton. Earth and Planetary Science Letters, v. 339-340, p. 57-66, doi:10.1016/j.epsl.2012.04.025.

Blackburn, T.J., Bowring, S.A., Perron, J.T., Mahan, K.H., Dudas, F.O., and Barnhart, K.R., 2012, A thermal and exhumation history of continents at billion year time-scales, Science, v. 335, p. 73-76, doi: 10.1126/science.1213496.

Blackburn, T.J., Shimizu, N., Bowring, S.A., Schoene, B., Mahan, K.H., 2012, Zirconium in rutile speedometry: constraining deep lithosphere temperature-time histories over a 1000-500 °C temperature range, Earth and Planetary Science Letters, v. 317-318, p. 231-240.

Karlstrom, K.E., Ilg, B.R., Hawkins, D., Williams, M.L., Dumond, G., Mahan, K., and Bowring, S.A., 2012, Vishnu basement rocks of the Upper Granite Gorge: Continent formation 1.84 to 1.66 billion years ago, Geological Society of America Special Papers 489, p. 7-24, doi: 10.1130/2012.2489(01).


Mahan, K.H., Smit, A., Williams, M.L., Dumond, G., and Van Reeenen, D.D., 2011, Heterogeneous strain and polymetamorphism in high-grade terranes: Insight into crustal processes from the Athabasca Granulite Terrane, western Canada and Limpopo Complex, southern Africa, in Edited by D.D. van Reenen, J.D. Kramers, S. McCourt, & L. L. Perchuk, Origin and Evolution of Precambrian High-Grade Gneiss Terranes, with Special Emphasis on the Limpopo Complex of Southern Africa, GSA Memoir 207, 269-287, doi: 10.1130/2011.1207(14).

Blackburn, T.J., Bowring, S., Schoene, B., Mahan, K.H., Dudas, F., 2011, U-Pb Thermochronology: creating a temporal record of lithosphere thermal evolution, Contributions to Mineralogy and Petrology, v. 162, p. 479-500, DOI: 10.1007/s00410-011-0607-6.


Blackburn, T.J., Bowring, S., Burdick, S., van der Hilst, R., Mahan, K.H., Barnhart, K., 2010, U-Pb thermochronology: 4-Dimensional Imaging of the North American Lithosphere, inSights: the EarthScope newsletter, Spring 2010.

Mahan, K.H., Wernicke, B., and Jercinovic, M.J., 2010, Th-U-total Pb geochronology of authigenic monazite in the Adelaide rift complex, South Australia, Earth and Planetary Science Letters, 289, 76-86.


Mahan, K.H., Guest, B., Wernicke, B., and Niemi, N.A., 2009, Low-temperature thermochronologic constraints on the kinematic history and spatial extent of the Eastern California shear zone. Geosphere, v. 5, 1-13, doi: 10.1130/GES00226.1.

Williams, M.L., Karlstrom, K.E., Dumond, G., and Mahan, K.H., 2009, Perspectives on the architecture of continental crust from integrated field studies of exposed isobaric sections, in Crustal Cross Sections from the Western North American Cordillera and Elsewhere: Implications for Tectonic and Petrologic Processes (eds. Miller, R.B. and Snoke, A.W.), GSA Special Paper 456, 219-241.


Mahan, K.H., Goncalves, P., Flowers, R.M., Williams, M.L., and Hoffman-Setka, D., 2008, The role of heterogeneous strain in development and preservation of a polymetamorphic record in high-pressure granulitesJournal of Metamorphic Geology, v. 26, p. 669-695.

Flowers, R.M., Bowring, S.A., Mahan, K.H., Williams, M.L., 2008, Craton stabilization and disruption from the lower crustal record in the western Canadian shieldContributions to Mineralogy and Petrology, DOI:10.1007/s00410-008-0301-5.

Hetherington, C.J., Williams, M.L., Jercinovic, M.J., and Mahan, K.H., 2008, Application of electron-probe microanalysis to composition, chronology, and occurrence of xenotime for understanding geologic processes. Chemical Geology, v. 254, p. 133-147.


Dumond, G., Mahan, K.H., Williams, M.L., and Karlstrom, K., 2007, Metamorphism in middle continental crust, Upper Granite Gorge, Grand Canyon, Arizona: implications for segmented crustal architecture, processes at 25-km-deep levels, and unroofing of orogensGeological Society of America Bulletin, v. 119; no. 1-2; p. 202-220; DOI:10.1130/B25903.1.


Mahan, K.H., 2006, Retrograde mica in deep crustal granulites: implications for crustal seismic anisotropyGeophysical Research Letters, v. 33, L24301, doi:10.1029/2006GL028130.

Mahan, K.H., Goncalves, P., Williams, M.L., and Jercinovic, M.J., 2006, Dating metamorphic reactions and fluid flow: application to exhumation of high-P granulites in a crustal-scale shear zone, western Canadian ShieldJournal of Metamorphic Geology, v. 24, p. 193-217, doi:10.1111/j.1525-1314.2006.00633.x.

Mahan, K.H., Williams, M.L., Flowers, R.M., Jercinovic, M.J., Baldwin, J.A., Bowring, S.A., 2006, Geochronological constraints on the Legs Lake shear zone with implications for regional exhumation of lower crust, Western Churchill Province, Canadian ShieldContributions to Mineralogy and Petrology. v. 152, p. 223-242, doi:10.1007/s00410-006-0106-3

Flowers, R.M., Mahan, K.H., Bowring, S.A., Williams, M.L., Pringle, M.S., Hodges, K.V., 2006, Multistage exhumation and juxtaposition of lower continental crust in the western Canadian Shield: Linking high-resolution U-Pb and 40Ar/39Ar thermochronology with P-T-D pathsTectonics, v. 25, TC4003, doi:10.1029/2005TC001912.

Williams, M.L., Jercinovic, M.J., Goncalves, P., and Mahan, K.H., 2006, Format and Philosophy for Collecting, Compiling, and Reporting Microprobe Monazite AgesChemical Geology, v. 225, p. 1-15.

Baldwin, J.A., Bowring, S.A., Williams, M.L., and Mahan, K.H., 2006, Geochronological constraints on the crustal evolution of felsic high-pressure granulites, Snowbird tectonic zone, CanadaLithos, v. 88, p. 173-200, doi:10.1016/j.lithos.2005.08.009.


Mahan, K.H. and Williams, M.L., 2005, Reconstruction of a large deep-crustal exposure: Implications for the nature of the Snowbird Tectonic Zone and early growth of LaurentiaGeology, v. 33, p. 385-388, DOI:10.1130/G21273.1.


Mahan, K.H., Williams, M.L., and Baldwin, J.A., 2003, Contractional uplift of deep crustal rocks along the Legs Lake shear zone, western Churchill Province, Canadian ShieldCanadian Journal of Earth Sciences, v. 40, p. 1085-1110, doi: 10.1139/E03-039.

Mahan, K.H., Bartley, J.M., Coleman, D.S., Glazner, A.F., Carl, B.S., 2003, Sheeted intrusion of the synkinematic McDoogle pluton, Sierra Nevada, CaliforniaGeological Society of America Bulletin, v. 115, p. 1570-1582, DOI:10.1130/B22083.1.


Mahan, K.H., Williams, M.L., Baldwin, J.A., and Bowring, S.A., 2001, Juxtaposition of deep crustal and middle crustal rocks across the Legs Lake shear zone in northern Saskatchewan. In Summary of Investigations, Vol. 2. Saskatchewan Geological Survey, Saskatchewan Energy Mines, 2001-4.2.

%d bloggers like this: