Thomas Lapen

fac portrait

Thomas Lapen

Curriculum Vitae pdf

Geology Graduate Advisor, Associate Professor of Geology, Isotope Geochemistry

Ph.D., 2005, University of Wisconsin-Madison
M.S., 1998, Western Washington University
B.S., 1995, Central Washington University

Office: 315-A SR1
Phone: (713) 893-1708

Google Scholar Profile
ResearchGate Profile

Selected Publications

  • McClelland W.C., Lapen T.J., 2013, Linking time to the pressure-temperature path for ultrahigh-pressure rocks. Elements, 9, 273-279.
  • Tomlinson D.W., Copeland P., Murphy M.A., Lapen T.J., 2013, Oligocene shortening in the Little Burro Mountains of southwest New Mexico. Rocky Mountain Geology, v. 48, 169–183.
  • Beard B.L., Ludois J.M., Lapen T.J., Johnson C.M., 2013, Pre-4.0 billion year weathering on Mars constrained by Rb-Sr geochronology on meteorite ALH 84001. Earth and Planetary Science Letters. 361, 173-182.
  • Sanchez VI, Murphy MA, Robinson AC, Lapen TJ, Heizler MT, 2013, Tectonic evolution of the India-Asia suture zone since Middle Eocene time, Lopukangri area, south-central Tibet. Journal of Asian Earth Sciences. V. 62, 205-220. doi:10.1016/j.jseaes.2012.09.004
  • Ahmad I, Khan S, Lapen TJ, Burke K, 2013, Isotopic ages for alkaline igneous rocks, including a 26 Ma ignimbrite, from the Peshawar Plain of northern Pakistan and their tectonic implications. Journal of Asian Earth Sciences. V. 62, 414-424. doi:/10.1016/j.jseaes.2012.10.025 
  • Shaulis B.J., Lapen T.J., Casey J.F., Reid D.R., 2012, Timing and rates of flysch sedimentation in the Stanley Group, Ouachita Mountains, Oklahoma and Arkansas, U.S.A.: Constraints from U-Pb zircon ages of subaqueous ash-flow tuffs. Journal of Sedimentary Research – Current Ripples. v. 82, 833-840. doi:10.2110/jsr.2012.68 
  • van Acken D., Brandon A.D., Lapen T.J., 2012, Highly siderophile element and osmium isotope evidence for post-core formation magmatic and impact processes on the aubrite parent body. Meteoritics and Planetary Science. V. 47, 1606-1623. doi:10.1111/j.1945-5100.2012.01425.x 
  • Peslier A.H., Woodland A.B., Bell D.R., Lazarov M., Lapen T.J., 2012, Metasomatic control of water contents in the Kaapvaal cratonic mantle.  Geochimica et Cosmochimica Acta. 97, 213-246. doi:10.1016/j.gca.2012.08.028 
  • Robinson AC, Ducea M, Lapen TJ, 2012, Detrital Zircon and Isotopic Constraints on the Crustal Architecture and Tectonic Evolution of the Northeastern Pamir. Tectonics. Tectonics, V 31, doi:10.1029/2011TC003013
  • Zhu Y, Bhattacharya JP, Li W, Lapen TJ, Jicha BR, Singer BS, 2012, Milankovitch-Scale Sequence Stratigraphy and Stepped Forced Regressions of the Turonian Ferron Notom Deltaic Complex, South-Central Utah, U.S.A Journal of Sedimentary Research, v. 82, 723-746.
  • Copeland P., Murphy M.A., Dupre W.R., Lapen T.J., 2011, Oligocene deformation in southern New Mexico and its implications for Farallon plate geodynamics. Geosphere, 7, 1209-1219; doi: 10.1130/GES00672.1.
  • Hui, H., Peslier, A.H., Lapen, T.J., Shafer, J.T., Brandon, A.D., Irving, A.J., 2011, Petrogenesis of basaltic shergottite Northwest Africa 5298: Closed system crystallization of an oxidized mafic melt. Meteoritics and Planetary Science, 46, 1313-1328; doi: 10.1111/j.1945-5100.2011.01231.x.
  • Zhang R, Murphy MA, Lapen TJ, Sanchez V, Heizler M, 2011, Late Eocene crustal thickening followed by Early-Late Oligocene Extension along the India-Asia suture zone: Evidence for cyclicity in the Tibet-Himalayan orogen. Geosphere, 7, 1249-1268; doi: 10.1130/GES00643.1.
  • Shaulis, B., Lapen, T.J., Toms, A., 2010, Signal linearity of an extended range pulse counting detector: Applications to accurate and precise U‐Pb dating of zircon by laser ablation quadrupole ICP‐MS, Geochem. Geophys. Geosyst., 11, Q0AA11, doi:10.1029/2010GC003198.
  • Shafer, J.T., Brandon, A.D., Lapen, T.J., Righter, M., Peslier, A.H., Beard, B.L., 2010, Trace element systematics and 147Sm-143Nd and 176Lu-176Hf ages of Larkman Nunatak 06319: Closed-system fractional crystallization of an enriched shergottite magma, Geochimica et Cosmochimica Acta, 74, 7307-7328, DOI: 10.1016/j.gca.2010.09.009.
  • Peslier A.H., Hnatyshin D., Herd, C.D.K., Walton E.L., Brandon A.D., Lapen T.J., Shafer J.T., 2010, Crystallization, melt inclusion, and redox history of a new Martian meteorite: olivine phyric shergottite LAR 06319. Geochimica et Cosmochimica Acta. 74:4543-4576.
  • Lapen T.J., Righter M., Brandon A.D., Debaille V., Beard B.L., Shafer J.T., and Peslier A.H., 2010, A younger age for ALH 84001 and its geochemical link to shergottite sources in Mars. Science, 328, 347 – 351. DOI: 10.1126/science.1185395
  • Skora, S, Lapen, TJ, Baumgartner, LP, Johnson, CM, Hellenbrand, E, and Mahlen, NJ., 2009, The duration of prograde garnet crystallization in the UHP eclogites at Lago di Cignana, Italy.  Earth Planet. Sci. Lett. 287:402-411. 
  • Brandon, AD, Lapen, TJ, Debaille, V, Beard, BL, Rankenburg, K, and Neal, C., 2009, Re-evaluating 142Nd/144Nd in Lunar Mare basalts with implications for the early evolution and bulk Sm/Nd of the Moon.  Geochim. Cosmochim. Acta 73:6421-6445.
  • Lapen, T.J., Medaris, L.G.Jr., Beard, B.L., Johnson, C.M., 2009, The Sandvik peridotite, Gurskøy, Norway: Three billion years of mantle evolution in the Baltica lithosphere. Lithos, doi:10.1016/j.lithos.2008.08.007.
  • Lapen T.J., Cuthbert, S., Dobrzhinetskaya, L., 2008, International Eclogite Field Symposium and Workshop of the Task Force IV, International Lithosphere Program; Episodes, v. 31, 1-3.
  • Skora, S., Baumgartner, L.P., Mahlen, N.J., Lapen, T.J., Bussy, F., 2008, Estimation of a maximum Lu diffusion rate in a natural eclogite garnet. Swiss J. Geosciences, DOI: 10.1007/s00015-008-1268-y.
  • Chafetz, H.S., Wu, Z., Lapen, T.J., Milliken, K.L., 2008, Geochemistry of preserved Permian aragonitic cements in the tepees of the Guadalupe Mountains, West Texas and New Mexico, U.S.A.; Journal Sedimentary Research, 78, 187-198
  • Mahlen, N.J., Beard, B.L., Johnson, C.M., Lapen, T.J., 2008, An investigation of dissolution methods for Lu-Hf and Sm-Nd isotope studies in zircon and garnet bearing whole rock samples. Geochemistry, Geophysics, and Geosystems (G3) 9, Q01002, doi:10.1029/2007GC001605
  • Copeland, P., Watson, E.B., Urizar, S.C., Patterson, D., Lapen, T.J., 2007, Alpha thermochronology of carbonates I: Experimental data, Geochimica et Cosmochimica Acta, 71, 4488-4511.
  • Kylander-Clark, A.R.C., Hacker, B.R., Johnson, C.M., Beard, B.L., Mahlen, N.J., Lapen, T.J., 2007, Coupled Lu-Hf and Sm-Nd geochronology constrains prograde and exhumation histories of high- and ultrahigh-pressure eclogites from western Norway. Chem. Geol. 242:137-154.
  • Lapen, T.J., Johnson, C.M., Baumgartner, L.P., Dal Piaz, G.V., Skora, S., Beard, B.L., 2007, Coupling of oceanic and continental crust during Eocene eclogite facies metamorphism: Evidence from the Monte Rosa nappe, Western Alps, Italy. Contributions to Mineralogy Petrology, 153:139-157.
  • Lapen, TJ, Medaris, LG Jr, Johnson, CM, and Beard, BL, 2005, Archean to Middle Proterozoic evolution of Baltica subcontinental lithosphere: evidence from combined Sm- Nd and Lu-Hf isotpe analyses of the Sandvik ultramafic body, Norway. Contrib. Mineral. Petrol. 150:131-145.
  • Brown, E.H., Lapen, T.J., Leckie, M.R., Silva, P.I., Verga, D., Singer, B.S., 2005, Revised ages of blueschist metamorphism and the youngest pre-thrusting rocks in the San Juan Islands, Washington. Canadian Journal of Earth Sciences, 42:1389-1400.
  • Jicha, B.R., Singer, B., Brophy, J.G., Fournelle, J.H., Johnson, C.M., Beard, B.L., Lapen, T.J., and Mahlen, N.J., 2004, Variable impact of the subducted slab on Aleutian island arc magma sources: evidence from Sr, Nd, Pb, and Hf isotopes and trace element abundances. Jour. Petrol. 45:1845-1875.
  • Lapen, T.J., Mahlen, N.J., Johnson, C.M., Beard, B.L., 2004, High precision Lu and Hf isotope analyses of both spiked and unspiked samples: A new approach, Geochem Geophys Geosyst, 5, Q01010, doi: 10.1029/2003GC000582
  • Lapen, T.J., Johnson, C.M., Baumgartner, L.P., Mahlen, N.J., Beard, B.L., Amato, J.M., 2003, Burial rates during prograde metamorphism of an ultra-high pressure terrane: an example from Lago di Cignana, Western Alps, Italy, Earth Planet Sci Lett, 215, 57-72.
  • Brown, E.H., Talbot, J.L., McClelland, W.C., Feltman, J.A., Lapen, T.J., Bennett, J.D., Hettinga, M.A., Troost, M.L., Alvarez, K.M., Calvert, A.T., 2000, Interplay of plutonism and regional deformation in an obliquely convergent arc, southern Coast Belt, British Columbia: Tectonics, vol. 19, no. 3, p. 493-511.
  • Dragovich, J.D., Logan, R.L., Schasse, H.W., Walsh, T.J., Lingley, W.S. Jr., Norman, D.K., Gerstel, W.J., Lapen, T.J, Schuster, J.E., and Meyers, K.D., 2002, Geologic map of Washington. Northwest quadrant: Washington Division of Geology and Earth Resources Geologic Map GM-50, 72 p., 3 pl., scale 1:250,000.
  • Loen, J.S., Lingley, W.S., Jr., Anderson, Garth, Lapen, T.J., 2001, Reconnaissance investigation of sand, gravel, and quarried bedrock resources in the Bellingham 1:100,000 quadrangle, Washington: Washington Division of Geology and Earth Resources Information Circular 91, 45 p., 1 plate.
  • Lapen, T.J., 2000, Geologic map of the Bellingham 1:100,000-scale quadrangle, Washington: Washington Division of Geology and Earth Resources Open-File-Report 00-5, 35 p., 2 plates.
  • Dragovich, J.D., Norman, D.K., Lapen, T.J., Anderson, G., 1999, Geologic map of the Sedro-Woolley North and Lyman 7.5-minute quadrangles, western Skagit County, Washington: Washington Division of Geology and Earth Resources Open-File-Report 99-3, 37 p., 4 plates.