Jan Tullis Explained

Julia Ann ("Jan") Tullis
Birth Name:Julia Ann Tullis
Nationality:American
Alma Mater:Carleton College (A.B.)University of California, Los Angeles (PhD)
Thesis Title:Preferred orientations in experimentally deformed quartzites
Thesis Url:https://catalog.library.ucla.edu/vwebv/holdingsInfo?bibId=3321792
Thesis Year:1971
Doctoral Advisor:David T. Griggs, John Christie
Doctoral Students:Greg Hirth
Known For:Deformation Mechanics

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.

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

Awards and honors

Notes and References

  1. Web site: 1993 . Carleton Geology Newsletter .
  2. Web site: Overview .
  3. Web site: Undergraduate Advisors . 2022-12-08 . Department of Earth, Environmental & Planetary Sciences Brown University . en.
  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 . en . 247 . 1 . 1–23 . 10.1016/0040-1951(95)00011-B . 1995Tectp.247....1G . 0040-1951.
  5. Microstructures and Preferred Orientations of Experimentally Deformed Quartzites . 2022-12-18 . Geological Society of America Bulletin . 10.1130/0016-7606(1973)84<297:mapooe>2.0.co;2. 1973 . Tullis . JAN . Christie . John M. . Griggs . David T. . 84 . 1 . 297 . 1973GSAB...84..297T .
  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 . en . 114 . B4 . B04201 . 10.1029/2008JB005884 . 2009JGRB..114.4201C . 0148-0227. free .
  7. Stünitz . Holger . Tullis . Jan . 2001-05-01 . Weakening and strain localization produced by syn-deformational reaction of plagioclase . International Journal of Earth Sciences . en . 90 . 1 . 136–148 . 10.1007/s005310000148 . 2001IJEaS..90..136S . 129033150 . 1437-3262.
  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 . 10.1144/gsl.sp.2001.200.01.12 . 2002GSLSP.200..191H . 129319082 . 0305-8719.
  9. Microstructures and Preferred Orientations of Experimentally Deformed Quartzites . 2022-12-08 . Geological Society of America Bulletin . 10.1130/0016-7606(1973)84<297:mapooe>2.0.co;2. 1973 . Tullis . JAN . Christie . John M. . Griggs . David T. . 84 . 1 . 297 . 1973GSAB...84..297T .
  10. Tullis . Jan . Yund . Richard A. . 1977-12-10 . Experimental deformation of dry westerly granite . Journal of Geophysical Research . en . 82 . 36 . 5705–5718 . 10.1029/JB082i036p05705. 1977JGR....82.5705T .
  11. Tullis . J. . Yund . R. A. . 1980-01-01 . Hydrolytic weakening of experimentally deformed Westerly granite and Hale albite rock . Journal of Structural Geology . en . 2 . 4 . 439–451 . 10.1016/0191-8141(80)90005-X . 1980JSG.....2..439T . 0191-8141.
  12. Significance and petrogenesis of mylonitic rocks . 2022-12-08 . Geology . 10.1130/0091-7613(1982)10<227:sapomr>2.0.co;2. 1982 . Tullis . Jan . Snoke . Arthur W. . Todd . Victoria R. . 10 . 5 . 227 . 1982Geo....10..227T .
  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 . en . 89 . B6 . 4281–4297 . 10.1029/JB089iB06p04281. 1984JGR....89.4281K .
  14. Dynamic recrystallization of feldspar: A mechanism for ductile shear zone formation . 2022-12-08 . Geology . 10.1130/0091-7613(1985)13<238:drofam>2.0.co;2. 1985 . Tullis . Jan . Yund . Richard A. . 13 . 4 . 238 . 1985Geo....13..238T .
  15. Hirth . Greg . Tullis . Jan . 1992-02-01 . Dislocation creep regimes in quartz aggregates . Journal of Structural Geology . en . 14 . 2 . 145–159 . 10.1016/0191-8141(92)90053-Y . 1992JSG....14..145H . 0191-8141.
  16. 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 . en . 247 . 1 . 1–23 . 10.1016/0040-1951(95)00011-B . 1995Tectp.247....1G . 0040-1951.
  17. Deformation-enhanced fluid distribution in feldspar aggregates and implications for ductile shear zones . 2022-12-08 . Geology . 10.1130/0091-7613(1996)024<0063:defdif>2.3.co;2. 1996 . Tullis . J. . Yund . R. . Farver . J. . 24 . 1 . 63 . 1996Geo....24...63T .
  18. Dell'Angelo . Lisa N. . Tullis . Jan . 1996-05-15 . Textural and mechanical evolution with progressive strain in experimentally deformed aplite . Tectonophysics . en . 256 . 1 . 57–82 . 10.1016/0040-1951(95)00166-2 . 1996Tectp.256...57D . 0040-1951.
  19. Post . Alice . Tullis . Jan . 1999-03-15 . A recrystallized grain size piezometer for experimentally deformed feldspar aggregates . Tectonophysics . en . 303 . 1 . 159–173 . 10.1016/S0040-1951(98)00260-1 . 1999Tectp.303..159P . 0040-1951.
  20. Stünitz . Holger . Tullis . Jan . 2001-05-01 . Weakening and strain localization produced by syn-deformational reaction of plagioclase . International Journal of Earth Sciences . en . 90 . 1 . 136–148 . 10.1007/s005310000148 . 2001IJEaS..90..136S . 129033150 . 1437-3262.
  21. 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 . 10.1144/gsl.sp.2001.200.01.12 . 2002GSLSP.200..191H . 129319082 . 0305-8719.
  22. de Ronde . A. A. . Stünitz . H. . Tullis . J. . Heilbronner . R. . 2005-11-16 . Reaction-induced weakening of plagioclase–olivine composites . Tectonophysics . en . 409 . 1 . 85–106 . 10.1016/j.tecto.2005.08.008 . 2005Tectp.409...85D . 0040-1951.
  23. Dauphiné twinning as evidence for an impact origin of preferred orientation in quartzite: An example from Vredefort, South Africa . 2022-12-08 . Geology . 10.1130/g21163.1. 2005 . Wenk . H.-R. . Lonardelli . I. . Vogel . S.C. . Tullis . J. . 33 . 4 . 273 . 2005Geo....33..273W .
  24. 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 . en . 111 . B4 . B04201 . 10.1029/2005JB003852 . 2006JGRB..111.4201S . 0148-0227. free .
  25. 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 . en . 28 . 4 . 621–640 . 10.1016/j.jsg.2006.01.008 . 2006JSG....28..621H . 129457174 . 0191-8141.
  26. 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 . en . 111 . B10 . B10202 . 10.1029/2005JB004194 . 2006JGRB..11110202H . 0148-0227.
  27. 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 . en . 114 . B4 . B04201 . 10.1029/2008JB005884 . 2009JGRB..114.4201C . 0148-0227. free .
  28. Web site: http://www.minsocam.org/MSA/Awards/Fellowslist.html . 2022-12-08 . www.minsocam.org.
  29. Web site: Fellowship - Current Fellows . 2022-12-08 . www.geosociety.org.
  30. Web site: Faculty Teaching Award . 2022-12-08 . Dean of the Faculty Brown University . en.
  31. Web site: Tullis . 2021-06-27 . Honors Program . en-US.
  32. Thornburg . J. B. . 1998 . Tullis wins outstanding educator award . Eos, Transactions American Geophysical Union . en . 79 . 43 . 519 . 10.1029/98EO00384 . 1998EOSTr..79..519T . 0096-3941. free .
  33. Web site: 2007 . Artful Teaching: A Brief History of the Harriet W. Sheridan Center for Teaching and Learning, 1987-2007 .
  34. Web site: 2011-02-16 . Good advisors at Brown . 2022-12-08 . College Confidential Forums . en.
  35. Web site: Geology . Jan Tullis '65 Honored For Career Contributions In Structural Geology - Carleton College . 2022-12-08 . www.carleton.edu . en-US.

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