Jan Tullis

Julia Ann “Jan” Tullis is an American structural geologist and emerita Professor at Brown University. Tullis is known for her work in structural geology, especially for her experimental work in deformation mechanisms, microstructures, and rheology of crustal rocks.

Julia Ann ("Jan") Tullis
Born
Julia Ann Tullis
NationalityAmerican
Alma materCarleton College (A.B.) University of California, Los Angeles (PhD)
Known forDeformation Mechanics
Scientific career
Fields
  • Geology
  • Rock mechanics
  • Rheology
Institutions
  • University of California, Los Angeles
  • Brown University
ThesisPreferred orientations in experimentally deformed quartzites (1971)
Doctoral advisorDavid T. Griggs, John Christie

Education and career

Tullis graduated Magna Cum Laude with distinction from Carleton College in June 1965,[1] earning her A.B. in Geology. Following this she completed her PhD at the University of California, Los Angeles in 1971 with a thesis on experimental rock deformation. Tullis became a research assistant at Brown University while editing her dissertation in 1970. Later, Tullis was named a Research Assistant Professor in 1971, Associate Professor in 1979, and a full Professor in 1989.[2] She transitioned to Professor Emerita in 2013 but continues with undergraduate teaching and advising.[3]

Research

Tullis' research involved experimental investigations of the deformation mechanisms, microstructures and rheology of crustal rocks using constant strain-rate Griggs-type solid medium apparatus including adaptations for molten salt assemblies.[4] Her two major goals were to enable more accurate inferences concerning the thermomechanical history of naturally deformed rocks based on their preserved microstructures and crystallographic preferred orientations, and to provide mechanical data and flow laws to enable more accurate modeling of crustal deformation under various conditions.[5]

Experiments were conducted on monophase and polyphase aggregates, both natural and synthetic, over a wide range of pressure and temperature conditions equivalent to those from the shallow to the deep crust, and involving varying controlled water contents. She and her students and other collaborators documented grain-scale Deformation mechanisms from brittle fracturing to cataclastic flow to dislocation creep and melt or fluid-enhanced diffusion creep.[6] These experiments investigated the role of phase distribution and contiguity in the progressive deformation of polyphase aggregates, and documented a number of processes resulting in strain weakening and localization, such as in mylonite zones.[7] Tullis' work with Renee Heilbronner examined fabric evolution during progressive shearing and static annealing.[8]

Selected publications
  • Microstructures and preferred orientations of experimentally deformed quartzite: Tullis, Christie, and Griggs (1973)[9]
  • Experimental deformation of dry westerly granite: Tullis and Yund (1977)[10]
  • Hydrolytic weakening of experimentally deformed westerly granite and Hale albite rock: Tullis and Yund (1980)[11]
  • Significance and petrogenesis of mylonitic rocks: Tullis, Snoke, and Todd (1982)[12]
  • Flow strengths of quartz aggregates: grain size and pressure effects due to hydrolytic weakening: Kronenberg and Tullis (1984)[13]
  • Dynamic recrystallization of feldspar: a mechanism for ductile shear zone formation: Tullis and Yund (1985)[14]
  • Ductile shear zone from brittle precursors in feldspathic rocks: the role of dynamic recrystallization: Tullis, Dell Angelo, and Tund (1990)[15]
  • Dislocation creep regimes in quartz aggregates: Hirth and Tullis (1992)[16]
  • Chapter 4 The Brittle-Ductile transition in feldspar aggregates: an experimental study: Tullis and Yund (1992)[17]
  • A flow law for dislocation creep of quartz aggregates determined with the molten salt cell: Gleason and Tullis (1995)[18]
  • Deformation-enhanced fluid distribution in feldspar aggregates and implications for ductile shear zones: Tullis, Yund, and Farver (1996)[19]
  • Textural and mechanical evolution with progressive strain in experimentally deformed aplite: Dell Angelo and Tullis (1996)[20]
  • A recrystallized grain size piezometer for experimentally deformed feldspar aggregates: Post and Tullis (1999)[21]
  • Weakening and strain localization produced by syn-deformational reaction of plagioclase: Stunitz and Tullis(2001)[22]
  • The effect of static annealing on microstructures and crystallography preferred orientations of quartzites experimentally deformed in axial compression and shear: Heilbronner and Tullis (2002)[23]
  • Reaction-induced weakening of plagioclase-olivine composites: DeRonde, Stunitz, and Tullis (2005)[24]
  • Dauphiné twinning as evidence for an impact origin of preferred orientation in quartzite: An example from Vredefort, South Africa: Holyoke and Tullis (2005)[25]
  • Effect of water on the dislocation creep microstructure and flow stress of quartz and implications for the recrystallized grain size piezometer: Stipp and Tullis (2006)[26]
  • Mechanisms of weak phase interconnection and the effects of phase strength contrast on fabric development: Holyoke and Tullis (2006)[27]
  • Evolution of c axis pole figures and grain size during dynamic recrystallization: Results from experimentally sheared quartzite: Heilbronner and Tullis (2006)[28]
  • Effect of aqueous and carbonic fluids on the dislocation creep strength of quartz: Chernak, Hirth, Selverstone, and Tullis (2009) [29]

Awards and honors

References
  1. "Carleton Geology Newsletter" (PDF). 1993.
  2. "Overview".
  3. "Undergraduate Advisors". Department of Earth, Environmental & Planetary Sciences | Brown University. Retrieved 2022-12-08.
  4. Gleason, Gayle C.; Tullis, Jan (1995-07-30). "A flow law for dislocation creep of quartz aggregates determined with the molten salt cell". Tectonophysics. 30 Years of Tectonophysics a Special Volume in Honour of Gerhard Oertel. 247 (1): 1–23. doi:10.1016/0040-1951(95)00011-B. ISSN 0040-1951.
  5. Tullis, JAN; Christie, John M.; Griggs, David T. (1973). "Microstructures and Preferred Orientations of Experimentally Deformed Quartzites". Geological Society of America Bulletin. 84: 297. doi:10.1130/0016-7606(1973)84<297:mapooe>2.0.co;2. Retrieved 2022-12-18.
  6. Chernak, Linda J.; Hirth, Greg; Selverstone, Jane; Tullis, Jan (2009-04-01). "Effect of aqueous and carbonic fluids on the dislocation creep strength of quartz". Journal of Geophysical Research. 114 (B4): B04201. doi:10.1029/2008JB005884. ISSN 0148-0227.
  7. Stünitz, Holger; Tullis, Jan (2001-05-01). "Weakening and strain localization produced by syn-deformational reaction of plagioclase". International Journal of Earth Sciences. 90 (1): 136–148. doi:10.1007/s005310000148. ISSN 1437-3262. S2CID 129033150.
  8. Heilbronner, Renée; Tullis, Jan (January 2002). "The effect of static annealing on microstructures and crystallographic preferred orientations of quartzites experimentally deformed in axial compression and shear". Geological Society, London, Special Publications. 200 (1): 191–218. doi:10.1144/gsl.sp.2001.200.01.12. ISSN 0305-8719. S2CID 129319082.
  9. Tullis, JAN; Christie, John M.; Griggs, David T. (1973). "Microstructures and Preferred Orientations of Experimentally Deformed Quartzites". Geological Society of America Bulletin. 84: 297. doi:10.1130/0016-7606(1973)84<297:mapooe>2.0.co;2. Retrieved 2022-12-08.
  10. Tullis, Jan; Yund, Richard A. (1977-12-10). "Experimental deformation of dry westerly granite". Journal of Geophysical Research. 82 (36): 5705–5718. doi:10.1029/JB082i036p05705.
  11. Tullis, J.; Yund, R. A. (1980-01-01). "Hydrolytic weakening of experimentally deformed Westerly granite and Hale albite rock". Journal of Structural Geology. 2 (4): 439–451. doi:10.1016/0191-8141(80)90005-X. ISSN 0191-8141.
  12. Tullis, Jan; Snoke, Arthur W.; Todd, Victoria R. (1982). "Significance and petrogenesis of mylonitic rocks". Geology. 10 (5): 227. doi:10.1130/0091-7613(1982)10<227:sapomr>2.0.co;2. Retrieved 2022-12-08.
  13. Kronenberg, Andreas K.; Tullis, Jan (1984-06-10). "Flow strengths of quartz aggregates: Grain size and pressure effects due to hydrolytic weakening". Journal of Geophysical Research: Solid Earth. 89 (B6): 4281–4297. doi:10.1029/JB089iB06p04281.
  14. Tullis, Jan; Yund, Richard A. (1985). "Dynamic recrystallization of feldspar: A mechanism for ductile shear zone formation". Geology. 13 (4): 238. doi:10.1130/0091-7613(1985)13<238:drofam>2.0.co;2. Retrieved 2022-12-08.
  15. Tullis, Jan; Dell'Angelo, Lisa; Yund, Richard A. (1990), Duba, A. G.; Durham, W. B.; Handin, J. W.; Wang, H. F. (eds.), "Ductile shear zones from brittle precursors in feldspathic rocks: The role of dynamic recrystallization", Geophysical Monograph Series, Washington, D. C.: American Geophysical Union, vol. 56, pp. 67–81, doi:10.1029/gm056p0067, ISBN 978-0-87590-025-4, retrieved 2022-12-08
  16. Hirth, Greg; Tullis, Jan (1992-02-01). "Dislocation creep regimes in quartz aggregates". Journal of Structural Geology. 14 (2): 145–159. doi:10.1016/0191-8141(92)90053-Y. ISSN 0191-8141.
  17. Tullis, J.; Yund, R. (1992-01-01), Evans, Brian; Wong, Teng-fong (eds.), "Chapter 4 The Brittle-Ductile Transition in Feldspar Aggregates: An Experimental Study", International Geophysics, Fault Mechanics and Transport Properties of Rocks, Academic Press, vol. 51, pp. 89–117, doi:10.1016/s0074-6142(08)62816-8, ISBN 9780122437809, retrieved 2022-12-08
  18. Gleason, Gayle C.; Tullis, Jan (1995-07-30). "A flow law for dislocation creep of quartz aggregates determined with the molten salt cell". Tectonophysics. 30 Years of Tectonophysics a Special Volume in Honour of Gerhard Oertel. 247 (1): 1–23. doi:10.1016/0040-1951(95)00011-B. ISSN 0040-1951.
  19. Tullis, J.; Yund, R.; Farver, J. (1996). "Deformation-enhanced fluid distribution in feldspar aggregates and implications for ductile shear zones". Geology. 24: 63. doi:10.1130/0091-7613(1996)024<0063:defdif>2.3.co;2. Retrieved 2022-12-08.
  20. Dell'Angelo, Lisa N.; Tullis, Jan (1996-05-15). "Textural and mechanical evolution with progressive strain in experimentally deformed aplite". Tectonophysics. 256 (1): 57–82. doi:10.1016/0040-1951(95)00166-2. ISSN 0040-1951.
  21. Post, Alice; Tullis, Jan (1999-03-15). "A recrystallized grain size piezometer for experimentally deformed feldspar aggregates". Tectonophysics. 303 (1): 159–173. doi:10.1016/S0040-1951(98)00260-1. ISSN 0040-1951.
  22. Stünitz, Holger; Tullis, Jan (2001-05-01). "Weakening and strain localization produced by syn-deformational reaction of plagioclase". International Journal of Earth Sciences. 90 (1): 136–148. doi:10.1007/s005310000148. ISSN 1437-3262. S2CID 129033150.
  23. Heilbronner, Renée; Tullis, Jan (January 2002). "The effect of static annealing on microstructures and crystallographic preferred orientations of quartzites experimentally deformed in axial compression and shear". Geological Society, London, Special Publications. 200 (1): 191–218. doi:10.1144/gsl.sp.2001.200.01.12. ISSN 0305-8719. S2CID 129319082.
  24. de Ronde, A. A.; Stünitz, H.; Tullis, J.; Heilbronner, R. (2005-11-16). "Reaction-induced weakening of plagioclase–olivine composites". Tectonophysics. 409 (1): 85–106. doi:10.1016/j.tecto.2005.08.008. ISSN 0040-1951.
  25. Wenk, H.-R.; Lonardelli, I.; Vogel, S.C.; Tullis, J. (2005). "Dauphiné twinning as evidence for an impact origin of preferred orientation in quartzite: An example from Vredefort, South Africa". Geology. 33 (4): 273. doi:10.1130/g21163.1. Retrieved 2022-12-08.
  26. Stipp, Michael; Tullis, Jan; Behrens, Harald (2006). "Effect of water on the dislocation creep microstructure and flow stress of quartz and implications for the recrystallized grain size piezometer". Journal of Geophysical Research. 111 (B4): B04201. doi:10.1029/2005JB003852. ISSN 0148-0227.
  27. Holyoke, Caleb W.; Tullis, Jan (2006-04-01). "Mechanisms of weak phase interconnection and the effects of phase strength contrast on fabric development". Journal of Structural Geology. 28 (4): 621–640. doi:10.1016/j.jsg.2006.01.008. ISSN 0191-8141. S2CID 129457174.
  28. Heilbronner, Renée; Tullis, Jan (2006-10-06). "Evolution of c axis pole figures and grain size during dynamic recrystallization: Results from experimentally sheared quartzite". Journal of Geophysical Research. 111 (B10): B10202. doi:10.1029/2005JB004194. ISSN 0148-0227.
  29. Chernak, Linda J.; Hirth, Greg; Selverstone, Jane; Tullis, Jan (2009-04-01). "Effect of aqueous and carbonic fluids on the dislocation creep strength of quartz". Journal of Geophysical Research. 114 (B4): B04201. doi:10.1029/2008JB005884. ISSN 0148-0227.
  30. www.minsocam.org http://www.minsocam.org/MSA/Awards/Fellowslist.html. Retrieved 2022-12-08. {{cite web}}: Missing or empty |title= (help)
  31. "Fellowship - Current Fellows". www.geosociety.org. Retrieved 2022-12-08.
  32. "Faculty Teaching Award". Dean of the Faculty | Brown University. Retrieved 2022-12-08.
  33. "Tullis". Honors Program. Retrieved 2021-06-27.
  34. Thornburg, J. B. (1998). "Tullis wins outstanding educator award". Eos, Transactions American Geophysical Union. 79 (43): 519. doi:10.1029/98EO00384. ISSN 0096-3941.
  35. "Artful Teaching: A Brief History of the Harriet W. Sheridan Center for Teaching and Learning, 1987-2007" (PDF). 2007.
  36. "Good advisors at Brown". College Confidential Forums. 2011-02-16. Retrieved 2022-12-08.
  37. Geology. "Jan Tullis '65 Honored For Career Contributions In Structural Geology - Carleton College". www.carleton.edu. Retrieved 2022-12-08.
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