Julie Newman, Professor, Department of Geology and Geophysics, Texas A&M University

Texas A&M Department of Geology & Geophysics

M.T. Halbouty Building,
Room 157
Geology & Geophysics, TAMU
College Station, TX 77843-3115

newman@geo.tamu.edu

Phone: 979-845-9283
Fax: 979-845-6162

Assistant Professor; Ph.D., University of Rochester, 1993

Field and microstructural studies of crustal and upper mantle rocks; mechanisms of strain localization; fluid-rock interactions; interactions between deformation and metamorphism.

Determination of deformation processes, and conditions of deformation (pressure, temperature, stress, strain-rate) in crustal and upper mantle environments.

Structure and tectonics of mid-ocean ridges. Geothermometry and microstructural investigations of deformed rocks from ridge-settings.

Structure and tectonics of fold- and thrust- belts. Field mapping of structures, especially in cooperation with microstructural studies.

Experimental investigation of mechanical and microstructural behavior of carbonates using high pressure gas apparatus. (Funded by NSF: Experimental Deformation of Dolomite and Mechanisms of Flow in the Calcium-Magnesium Carbonate System. June 1, 2001 — May 31, 2003)

Applications of electron microscopy and electron backscattered diffraction (EBSD) to geology.

Peridotite ultramylonite from the North Pyrenees. Extreme grain size reduction is associated with localization into 5 mm to 30 m wide shear zones after relatively large and uniform strain on the kilometer scale.

Newman, J. and Drury, M.R., submitted. Controls on the location and scale of shear zones in upper mantle peridotites. Submitted to the Journal of Structural Geology.

Dijkstra, A.H., Drury, M.R., Vissers, R.L.M. and Newman, J. In press. Peridotite tectonites and mylonites in the Othris Massif (Greece): melt-rock reaction and shear zone formation. Journal of Structural Geology.

Newman, J., Lamb, W.M., Drury, M.R., and Vissers, R.L.M. 1999. Localization in a peridotite shear zone: Reaction-softening by a water-deficient, continuous net transfer reaction. Tectonophysics (303)1-4 (1999) pp. 193-222.

Newman, J. and Kronenberg, A.K. 1998. Plastically deformed layer 3 gabbros, Southwest Indian Ridge. Atlas of mylonitic and fault-related rocks, (eds: Snoke, A.W., Tullis, J.A., and Todd, V.R.)

Newman, J. and Mitra, G. 1998. Deformation and dynamic recrystallization of dolomite. Atlas of mylonitic and fault-related rocks, (eds: Snoke, A.W., Tullis, J.A., and Todd, V.R.)

Vissers, R.L.M., Drury, M.R., Newman, J. and Fliervoet, T.F., 1997. Mylonitic deformation in upper mantle peridotites of the North Pyrenean Zone (S France). Tectonophysics (The Adolphe Nicolas Volume, eds. Mainprice, D., Boudier, F. and Bouchez, J.-L), v. 279, pp. 303-325.

Newman, J. and Mitra, G. 1994. Fluid-influenced deformation and recrystallization of dolomite at low temperatures in naturally deformed rocks, Mountain City Window, TN. Bulletin Geological Society of America, v. 106, p. 1267-1280.

Newman, J. 1994. The influence of grain size and grain size distribution on methods for estimating paleostresses from twinning in carbonates. Journal of Structural Geology, v. 16, p. 1589-1601.

Newman, J. and Mitra, G. 1993. Lateral variations in mylonite zone thickness as influenced by fluid-rock interactions, Linville Falls fault, NC. Journal of Structural Geology, v. 15, p. 849-863.

Recent Abstracts

Newman, J. and Drury, M.R. 2001. Temperature — stress — strain rate path along a peridotite shear zone: Implications for dynamic processes within the upper mantle. International Meeting on Deformation Mechanisms, Rheology and Tectontonics, Leiden, Netherlands.

Newman, J. and Drury, M.R. 2000. Deformation history along a peridotite shear zone with implications for dynamic processes within the upper mantle. GSA Abstracts with Programs, v. 32.

Drury, M.R., Newman, J., Lamb, W.M., Vissers, R., and van Roermund, H. 2000. The role of lithospheric mantle in orgenesis: Coupled or uncoupled? (Un)coupled 2000: Continental Collision and Tectonosedimentary Evolution of Forelands: Mechanics of Coupling and Far-Field Deformation, Amsterdam, Netherlands.

Newman, J., Drury, M.R. and Lamb, W.M. 1999. Continuous net-transfer reaction during deformation of a peridotite shear zone: Implications for rheology of the upper mantle. INVITED PAPER. EOS, Trans. Am. Geophys. Union.

Newman, J. and Drury, M.R. 1999. The role of initial grain size in shear localization. International Meeting on Deformation Mechanisms, Rheology, and Microstructures, Neustadt, Germany.

Newman, J., Drury, M.R. and Lamb, W.M. 1998. Deformation of polyphase rocks: Implications for mechanical and chemical processes during grain size sensitive creep.
INVITED PAPER. GSA Abstracts with Programs, v. 30.

Newman, J. and Drury, M.R. 1998. Depth of localized shear zones in "wet" vs. "dry" lithosphere. Penrose Conference on Ophiolites and Oceanic Crust.

Dijkstra, A., Drury, M.R., Newman, J., and Vissers, R.L.M. 1998. Large-scale melt-rock interaction in the Othris lherzolite-ophiolite, central Greece. Penrose Conference on Ophiolites and Oceanic Crust.

Newman, J., Drury, M.R., Lamb, W.M. and Vissers, R.L.M. 1997. Reaction-enhanced, water-deficient localization in a peridotite shear zone. GSA Abstracts with Programs, v. 29.

Newman, J., Drury, M.R., Vissers, R.L.M. and Lamb, W.M. 1997. Reaction-induced deformation and localization in a peridotite shear zone from the northern Pyrenees (S. France). International Meeting on Deformation Mechanisms in Nature and Experiment. Basel, Switzerland.

Newman, J., Lamb, W.M., Kronenberg, A.K. and Tullis, J. 1995. Shear Localization in Mid-Ocean Ridge Gabbros. EOS, Trans. Am. Geophys. Union, v. 76.

Department of Geology and Geophysics, Texas A&M University

Center for Tectonophysics, Texas A&M University

Microscopy and Imaging Center, Texas A&M University

Geological Society of America

American Geophysical Union

Association of Women Geoscientists