Joshua Schwartz

Assistant Professor

Contact

Email: jschwartz@geo.ua.edu
Phone: 205-348-1878
Office: 239 Bevill
Fax: 205-348-0818

Education

B.A. 2000, Brown University;
M.A. 2003, Brown University;
Ph.D. 2007, University of Wyoming

Research Interests

My research interests focus on understanding processes that control the magmatic and tectonic evolution of oceanic lithosphere in modern and ancient environments. Aspects of my research examine mechanisms and timescales of magmatism at mid-ocean ridges and supra-subduction zones, and the collisional accretion of these rocks along convergent margins. This work utilizes geochemical and isotopic tools, particularly U-Pb geochronology, in combination with structural and petrologic observations to understand the age and origin of oceanic rocks and the processes that have affected them from igneous crystallization to subsequent metamorphism and deformation. Current projects that I am working on include:

• Petrologic and structural development of a long-lived, composite accretionary complex and forearc terrane (Baker terrane, Blue Mountains, NE Oregon)
• Timescales and processes of magmatic growth in slow-spreading oceanic crust (Atlantis Bank, Southwest Indian Ridge)
• Thermal evolution of an oceanic core complex (Atlantis Bank, Southwest Indian Ridge)

Representative publications:

Baines, A.G., Cheadle, M.J., John, B.E., Grimes, C.G., Schwartz, J.J., and Wooden, J.L, in press, SHRIMP Pb/U zircon ages constrain gabbroic crustal accretion at Atlantis Bank on the ultraslow-spreading Southwest Indian Ridge, Earth and Planetary Science Letters.

LaMaskin, T.A., Schwartz, J.J., Dorsey, R.J., Snoke, A.W., Johnson, K., and Vervoort, J.D., in press, Mesozoic sedimentation, magmatism, and tectonics in the Blue Mountains Province, northeastern Oregon, in O’Connor, J.E., Dorsey, R.J., and Madin, I.P., eds., Volcanoes to Vineyards: Geologic Field Trips through the Dynamic Landscape of the Pacific Northwest: Geological Society of America Field Guide 15, p. 187–202, doi: 10.1130/2009. fl d015(09).

Schwartz, J.J., Snoke, A.W., Frost, C.D, Barnes, C.G., Gromet, L.P., and Johnson, K., in press, Analysis of the Wallowa-Baker terrane boundary: Implications for tectonic accretion in the Blue Mountains province, northeastern Oregon, Geological Society of America Bulletin, doi: 10.1130/B26493.1.

Garlick, S.R., Medaris, L.G., Jr., Snoke, A.W., Schwartz, J.J., and Swapp, S.M., 2009, Granulite- to amphibolite-facies metamorphism and penetrative deformation in a disrupted ophiolite, Klamath Mountains, California: A deep view into the basement of an accreted oceanic arc, in Miller, R.B., and Snoke, A.W., eds., Crustal cross sections from the western North American Cordillera and elsewhere: Implications for tectonic and petrologic processes: Geological Society of America Special Paper 456, p. 151–186, doi: 10.1130/2009.2456(06).

Grimes, C.B., John, B.E., Cheadle, M.J., Mazdab, F.K., Wooden, S., and Schwartz, J.J., 2009, On the occurrence, trace element geochemistry, and crystallization history of zircon from in situ ocean lithosphere, Contributions to Mineralogy and Petrology, doi 10.1007/s00410-009-0409-2.

Schwartz, J. J., John, B.E., Cheadle, M. J., Reiners, P. W., and A. G. Baines, 2009, Cooling history of Atlantis Bank oceanic core complex: Evidence for hydrothermal activity 2.6 Ma off axis, Geochem. Geophys. Geosyst., 10, Q08020, doi:10.1029/2009GC002466.

Baines, A.G., Cheadle, M.J., John, B.E., and Schwartz, J.J., 2008, The rate of oceanic detachment faulting at Atlantis Bank, SW Indian Ridge, Earth and Planetary Science Letters, 273(1-2), 105-114, doi:10.1016/j.epsl.2008.06.013.

Schwartz, J.J., Gromet, L.P., and Miró, R., 2008, Timing and duration of the calc-alkaline arc of the Pampean Orogeny: implications for the Late Neoproterozoic to Cambrian evolution of Western Gondwana, The Journal of Geology, v.116, p.39-61.

Grimes, C.B., John, B.E., Kelemen, P.B., Mazdab, F., Wooden J.L., Cheadle, M.J., Hanghoj, K., and Schwartz, J.J., 2007, The trace element chemistry of zircons from oceanic crust: A method for distinguishing detrital zircon provenance: Geology, v. 35, p. 643-646.

Schwartz, J.J., John, B.E., Cheadle, M.J., Miranda, E.A., Grimes, C., Wooden, J.L., and Dick, H.J.B., 2005, Dating the Growth of Oceanic Crust at Slow-Spreading Ridges, Science, v. 310, p. 654-657.

Schwartz, J.J., Gromet, L.P., 2004, Provenance of a late Proterozoic-Early Cambrian basin, Sierras de Córdoba, Argentina, Precambrian Research, v. 129, p. 1-21.

Miró, R.C., Schwartz, J.J. and Gromet, P., 2004, Magmatismo calcoalcalino en la Sierra Norte de Córdoba. Su extensión temporal, in Aceñolaza et al. (Eds.), INSUGEO, Serie Correlación Geológica 16. Instituto Superior de Correlación Geológica, Tucumán, pp. 199-210.

Schwartz, J.J., 2004, A Web-Based History of Modern Hapkido, in Vogel, R. (Ed.), UC Berkeley Martial Arts Monograph, Berkeley, Ca. p. 1-22.

 

 

 

Department Info