Research Interests
My major research centers around the understanding of subduction zone processes. Several topics concerning dehydration of the downgoing oceanic crust (which induces magma generation in the overlying mantle wedge) can be approached by studying orogenic blueschists and eclogites as well as Mariana forearc serpentinites. The question of fluid mobility under high pressure conditions plays here a central role. Obviously so-called fluid-mobile elements are the tracers of choice, with specific interest in Li  and B (element concentration and isotope ratio), Cl, Rb, Ba, Cs and Sb. The tools that I use include several electron microprobe techniques (element mapping, high contrast back scattered imaging, etc.), secondary ion mass spectrometer,  laser ablation microprobe quadrupole-ICP-MS and multi collector-ICP-MS. 

Other projects where I'm currently involved include (1) chemical variation of metamorphic and detrital rutile, (2) development of trace element mineral standards and (3) significance of naturally occuring lawsonite eclogites. 

Curriculum Vitae

Personals	Date of Birth: 03/19/1968 in Bremen, Germany  Nationality: German
Education	1995-2000 Universität Göttingen, Germany and Memorial University, Canada; Ph.D.  1991-1995 Universität Göttingen, Germany, Geology and Mineralogy; Diplom  1990-1991 Exchange student at the University of Pennsylvania, USA  1988-1990 Universität Heidelberg, Germany, Geology; Vordiplom
Employment	Feb. 2004- April 2004  Guest researcher at the Université Paris, France. since Oct. 2001 Wissenschaftlicher Assistent at Universitaet Heidelberg, Germany July 2000- Sept. 2001 Research Associate at the University of Maryland, USA  April-July 2000 Research Associate at the Memorial University, Canada
Fellowships	July 2000- Sept. 2001 Feodor Lynen Fellowship, Alexander-von-Humboldt Stiftung May-Oct. 1995 DAAD scholarship for field studies in Graubünden, Switzerland and California, USA
Grants	NSF project "Li isotopic investigations of the crust and mantle". Co-PI with R.L. Rudnick, W.F. McDonough, P. Tomascak  DFG project Fo 181/10-1 "In-situ Spurenelementanalyse von hochdruckmetamorphen Gesteinen" (In-situ trace element analysis of high pressure metamorphic rocks). Co-PI with S.F. Foley  Various grants for national and international conferences (EU-Hochschulbüro travel grant, DMG travel grant, 7th International Kimberlite Conference travel grant).

Graduate and post-doctoral advisors

Prof. Stephen F. Foley (Mainz, Germany) 
Prof. William F. McDonough (University of Maryland, USA) 
Prof. Toby Rivers (Memorial University, Canada) 
Prof. Roberta L. Rudnick (University of Maryland, USA) 

Past and current collaborators

Dr. Matthias Barth (Universität Mainz, Germany) 
Dr. Pierre Cartigny (Université Paris 7, France) 
Dr. Jochen Halfar (Universität Stuttgart, Germany) 
Dr. Andreas Kronz (Universität Göttingen, Germany) 
Dr. Roland Stalder (Universität Göttingen, Germany) 
Dr. Daniel Stoeckli (University of Kansas, USA)
Dr. Sonia Tonarini (CNR, Pisa, Italy) 
Dr. Hilmar von Eynatten (Universität Göttingen, Germany)
Dr. Michael Wiedenbeck (GFZ Potsdam, Germany) 
Dr. Ivan Savov (Smithsonian Institution, USA)
Dr. Renato Moraes (Federal Univ. of Rio de Janeiro, Brazil)

Educational Commitment
 

since 2001	Assistant Professor (Introduction to Metamorphic Petrology; Introduction to Magmatic Petrology; Field Trips to Black Forest, Aegean, Alps; Field mapping in crystalline areas).
2001	Co-Supervisor of the University of Maryland Earth Science Summer Research Internships for Undergraduates.
1993	Lecturer at the Evening School (VHS) Göttingen. Geological excursions around Göttingen and introduction to geology (together 4 courses)

List of Publications

T. Zack, G.L. Luvizotto (2006): Application of rutile thermometry to eclogites. Min. Petr. 88, 69-85.
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T. Zack, R. Moraes, A. Kronz (2004): Temperature dependence of Zr in rutile: Empirical calibration of a rutile thermometer. Contr. Min. Petr. 148, 471-488.
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T. Zack, H. von Eynatten, A. Kronz (2004): Rutile geochemistry and its potential use in quantitative provenance studies. Sedimentary Geology 171, 37-58.
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R. Altherr, G. Topuz, H. Marschall, T. Zack, T. Ludwig (2004): Evolution of a tourmaline-bearing eclogite from the Elekdag area (Central Pontides, N Turkey): evidence for infiltration of subduction-related B-rich fluids during exhumation. Contr. Min. Petr. 148, 409-425.
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T. Zack, Rivers T, Brumm R, Kronz A (2004): Cold subduction of oceanic crust: Implications from a lawsonite eclogite from the Dominican Republic. European Journal of Mineralogy 16, 909-916.
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R. Gonfiantini, S. Tonarini, M. Gröning, A. Adorni-Braccesi, A.S. Al-Ammar, M. Astner, S. Bächler,R.M. Barnes, R.L. Bassett, A. Cocherie, A. Deyhle, A. Dini, G. Ferrara, J. Gaillardet, J. Grimm, C. Guerrot, U. Krähenbühl, G. Layne, D. Lemarchand, A. Meixner, D.J. Northington, M. Pennisi, E. Reitznerová, I. Rodushkin, N. Sugiura, R. Surberg, S. Tonn, M. Wiedenbeck, S. Wunderli, Y. Xiao, T. Zack (2003): Intercomparison of boron isotope and concentration measurements. Part II: Evaluation of results. Geostandards Newsletters 27, 41-57.

T. Zack, P. B. Tomascak, R. L. Rudnick, C. Dalpe, W. F. McDonough (2003): Extremely light Li in orogenic eclogites: The role of isotope fractionation during dehydration in subducted oceanic crust. Earth and Planetary Science Letters 208, 279-290.
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T. Zack, A. Kronz, S. Foley & T. Rivers (2002): Trace element abundance in rutiles from eclogites and associated garnet mica schists. Chem. Geol. 184, 97-122.
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T. Zack, S. Foley & T. Rivers (2002): Equilibrium and disequilibrium trace element partitioning in hydrous eclogites (Trescolmen, Central Alps). J. of Petrology 43, 1947-1974.
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T. Zack, T. Rivers & S. Foley (2001): Fluid infiltration at 2.0 GPa in eclogites from Trescolmen, Central Alps: Constraints from Cs-Rb-Ba systematics in phengites and amphiboles. Contr. Min. Petr. 140, 651-669. 
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J. Halfar, T. Zack, A. Kronz & J. C. Zachos (2000): Growth and high resolution paleoenvironmental signals of rhodoliths (coralline red algae): a new biogenic archive. J. Geophys. Res. C105, 22107-22116. 
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T. Zack (2000): Trace element mineral analysis in high pressure metamorphic rocks from Trescolmen, Central Alps. Dissertation, Universität  Göttingen, Germany. 98 pp. 
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C. Meyre, C. de Capitani, T. Zack & M. Frey (1999): Petrology of high-pressure metapelites from the Adula nappe (Central Alps, Switzerland). J. of Petrology 40, 199-213. 
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T. Zack, S. Foley & G.A. Jenner (1997): A consistent partition coefficient set for clinopyroxene, amphibole and garnet from laser ablation microprobe analysis of garnet pyroxenites from Kakanui, New Zealand. N. Jb. Miner. Abh. 172, 23-41. 
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Extended Abstracts

R.L. Rudnick, W.F. McDonough, P.B. Tomascak, T. Zack (2003): Lithium isotopic composition of eclogites: Implications for subduction zone processes. Extended Abstract of the 8th Int. Kimberlite Conf.

T. Zack & R. Brumm (1998): Ilmenite/liquid partition coefficients of 26 trace elements determined through ilmenite/clinopyroxene partitioning in garnet pyroxenites. Extended Abstract of the 7th International Kimberlite Conference, 986-988. PDF-file

T. Zack, S. Foley & T. Rivers (1998): Trace element partitioning between hydrous minerals (phengites, zoisite, amphibole) and omphacite in eclogites: Clues for modelling dehydration reactions in subduction zones. 8th V.M. Goldschmidt Conference, Mineralogical Magazine 62A, 1679-1680. 

J. Halfar, T. Zack, A. Kronz & J. C. Zachos (1998): Paleoenvironmental signals and growth rates of Rhodoliths- a geochemical approach. 8th V.M. Goldschmidt Conference, Mineralogical Magazine 62A, 559-560. 

Abstracts

T. Zack, H. Marschall (2003): Isotope fractionation during subduction: The case for Li and B. Goldschmidt conference abstracts, A573.

T. Zack (2003): The potential use of rutile geochemistry for provenance analysis. EGS'03 meeting. Geophysical research abstracts, 5: 12057.

T. Zack, P.B. Tomascak, W.F. McDonough, R.L. Rudnick, C. Dalpe (2002): Evidence for Li isotope fractionation during subduction. In Eleventh Annual Goldschmidt Conference, LPI Contribution 1088 (CD-Rom), p. 3768, Lunar and Planetary Institute, Houston, TX, 2001.

T. Zack, P.B. Tomascak, W.F. McDonough, C. Dalpe, R.L. Rudnick (2001): Light Li Isotopic Composition in Subducting Slabs:  Evidence From Alpine Eclogites. AGU fall meeting, Eos Trans. AGU 82(47), V12E-11. 

R.L.Rudnick, C. Dalpe, W.F. McDonough, P.B. Tomascak, T. Zack (2001): Li Isotopic Composition of the Mantle. AGU fall meeting, Eos Trans. AGU 82(47), V12C-0995. 

W.F. McDonough, R.L.Rudnick, C. Dalpe, P.B. Tomascak, T. Zack (2001): Li isotopes as a tracer of Earth Processes. AGU fall meeting,Eos Trans. AGU 82(47), V52B-11. 

T. Zack,  A. Kronz, S.F. Foley & T. Rivers (2001): The role of rutile as a major carrier for the extended HFSE group (Nb, Ta, W, Sb, Sn and Mo) in high pressure rocks. In 11th Annual V.M. Goldschmidt Conference, Abstract #3754. LPI Contribution No. 1088, Lunar and Planetary Institute, Houston (CD-ROM). 

T. Zack, P.B. Tomascak, R.L. Rudnick & W.F. McDonough (2001): Li isotope fractionation during slab dehydration? Implications from studies of subduction-related eclogites and associated garnet mica schists. In 11th Annual V.M. Goldschmidt Conference, Abstract #3768. LPI Contribution No. 1088, Lunar and Planetary Institute, Houston (CD-ROM). 

T. Zack, T. Rivers & S. Foley (2000): What governs the origin of the slab component in subducting oceanic crust? Insights from trace element distribution in deformed and massive eclogites. 10th Goldschmidt Conf., J. Conference Abstracts 5, 1118. Poster

T. Zack, S. Foley & T. Rivers (1999): Fluid infiltration in eclogites at 2 GPa: Evidence from Cs, Rb and Ba systematics. EUG'10 Conference, J. of Conference Abstracts 4, 716. 

T. Zack, S. Foley & T. Rivers (1999): The role of phengite, zoisite, lawsonite and rutile as trace element carriers in subducting slabs. 1999 AGU spring meeting, EOS, Trans. Am. Geophys. Union 80, S350. 

T. Zack, S. Foley & T. Rivers (1998): Trace element partitioning of hydrous minerals (phengite, zoisite, amphibole) in eclogites: Potential influence on the slab component in subduction zones. Geo-Berlinâ98, Terra Nostra, Schriften der Alfred-Wegener-Stiftung 98/3, V 401-402. 

T. Zack & S. Foley (1997): First Laser Ablation Microprobe measurements of trace-element partitioning between hydrous phases in high-pressure metamorphic rocks. Abstract to 7th Annual V.M. Goldschmidt Conference, p. 226, LPI Contribution No. 921, Lunar and Planetary Institute, Houston. 

T. Zack, S. Foley & T. Rivers (1997): Laser Ablation Microprobe measurements of high pressure metamorphic rocks; first results from eclogitic rocks of the Adula nappe. Abstract of 5th Int. Eclogite Conference, Supplement No. 1 to Terra Nova 9, 42. 

C. Meyre, T. Zack, C. de Capitani & M. Frey (1997): High-pressure metapelites of the Adula Nappe (Central Alps, Switzerland). Abstract of 5th Int. Eclogite Conference, Supplement No. 1 to Terra Nova 9, 20. 

T. Zack, S. Foley & G.A. Jenner (1996): A consistent partition coefficient set for 21 trace elements for clinopyroxene, amphibole and garnet through laser ablation microprobe analysis of garnet pyroxenites from Kakanui, New Zealand. 6th Goldschmidt Conf., J. Conference Abstracts 1, 691. 

T. Zack, S. Foley, S. Klemme & I. Horn (1994): Trace element distribution between amphibole, clinopyroxene and garnet in a high pressure cumulate from Kakanui, New Zealand. Late abstract for the 4th V.M. Goldschmidt Conference. Addendum to Mineralogical Magazine 58A. 

Useful links (Work in progress) 

Geochemistry 
Metamorphic petrology 
Big picture 
 

Own stuff
 
 

last updated 05/11/2007