Publications
2024
Schirra, M., Zajacz, Z. and Müller, D. (2025) Magnetite geochemistry of alkalic type giant epithermal gold deposits: insights into the magmatic evolution of mineralized alkaline systems. Geological Society, London, Special Publications 551. doi:https://doi.org/10.1144/SP551-2024-57?ref=pdf&rel=cite-as&jav=VoR
Hui, K.X., Rottier, B., Qin, K.Z., Zajacz, Z., Tsay, A., Zhao, J.X., Gao, S. and Shi, R.Z. (2024) Silver Behavior During Magmatic and Magmatic-Hydrothermal Evolution of a Highly Evolved Reduced Granitic System Related to the Giant Shuangjianzishan Ag-Pb-Zn-(Sn) Epithermal Deposit, Northeast China. Economic Geology 119. doi:10.5382/econgeo.5031
Mororo, E.A.A., Berkesi, M., Zajacz, Z. and Guzmics, T. (2024) Rare earth element transport and mineralization linked to fluids from carbonatite systems. Geology. doi:10.1130/g51531.1
Schirra, M., Zajacz, Z. and Müller, D. (2024) The hidden link between dry ankaramitic melts and giant alkalic-type epithermal Au deposits: The Lihir Island example. Geochimica Et Cosmochimica Acta 378, 82-98. doi:10.1016/j.gca.2024.06.024
Zhao, P.L., Zajacz, Z., Grondahl, C., Tsay, A., Mao, J.W., Cheng, Q.M. and Yuan, S.D. (2024) Indium partitioning between silicate melts and magmatic fluids: implications for indium ore genesis and the tracing of magma degassing. Geochimica Et Cosmochimica Acta 374, 146-155. doi:10.1016/j.gca.2024.03.030
2023
Farsang, S., Caracas, R., Adachi, T.B.M., Schnyder, C. and Zajacz, Z. (2023) S2- and S3- radicals and the S42- polysulfide ion in lazurite, hauyne, and synthetic ultramarine blue revealed by resonance Raman spectroscopy. American Mineralogist 108, 2234-2243. doi:10.2138/am-2022-8655
Hollings, P., Hanley, J., Smyk, M., Heaman, L., Cousens, B. and Zajacz, Z. (2023) The ∼1.1 Ga St. Ignace Island Complex, Northern Ontario, Canada: Evidence for Magma Mixing and Crustal Melting in the Generation of Midcontinent Rift-Related Bimodal Magmas and Implications for Regional Metallogeny. Journal of Petrology 64. doi:10.1093/petrology/egad032
2022
Alex, A. and Zajacz, Z. (2022a) A new high-pressure experimental apparatus to study magmatic processes at precisely controlled redox conditions. American Mineralogist 107, 692-702. doi:10.2138/am-2022-7977
Alex, A. and Zajacz, Z. (2022b) The solubility of Cu, Ag and Au in magmatic sulfur-bearing fluids as a function of oxygen fugacity. Geochimica Et Cosmochimica Acta 330, 93-115. doi:10.1016/j.gca.2022.03.036
Grondahl, C. and Zajacz, Z. (2022) Sulfur and chlorine budgets control the ore fertility of arc magmas. Nature Communications 13. doi:10.1038/s41467-022-31894-0
Marques, A.F.A., Madureira, P., Zajacz, Z., Hu, S.Y. and Ribeiro, L.P. (2022) Deep sourced magma and ore-metal mobility in the D. Joao de Castro submarine volcano (Azores): a mineral chemistry and melt inclusion study. Contributions to Mineralogy and Petrology 177. doi:10.1007/s00410-022-01963-0
Mei, Y., Liu, W.H., Xia, F., Zajacz, Z., Migdisov, A. and Williams-Jones, A. (2022) Preface to Base, Precious and Critical Metals in Fluid-Mineral Interactions. Geochimica Et Cosmochimica Acta 330, 1-5. doi:10.1016/j.gca.2022.06.030
Sullivan, N.A., Zajacz, Z., Brenan, J.M., Hinde, J.C., Tsay, A. and Yin, Y.W. (2022a) The solubility of gold and palladium in magmatic brines: Implications for PGE enrichment in mafic-ultramafic and porphyry environments. Geochimica Et Cosmochimica Acta 316, 230-252. doi:10.1016/j.gca.2021.09.010
Sullivan, N.A., Zajacz, Z., Brenan, J.M. and Tsay, A. (2022b) The solubility of platinum in magmatic brines: Insights into the mobility of PGE in ore-forming environments. Geochimica Et Cosmochimica Acta 316, 253-272. doi:10.1016/j.gca.2021.09.014
Zhao, P.L., Zajacz, Z., Tsay, A., Chu, X., Cheng, Q.M. and Yuan, S.D. (2022a) The partitioning behavior of Mo during magmatic fluid exsolution and its implications for Mo mineralization. Geochimica Et Cosmochimica Acta 339, 115-126. doi:10.1016/j.gca.2022.10.020
Zhao, P.L., Zajacz, Z., Tsay, A. and Yuan, S.D. (2022b) Magmatic-hydrothermal tin deposits form in response to efficient tin extraction upon magma degassing. Geochimica Et Cosmochimica Acta 316, 331-346. doi:10.1016/j.gca.2021.09.011
2021
Hetzinger, S., Halfar, J., Zajacz, Z., Möller, M. and Wisshak, M. (2021) Late twentieth century increase in northern Spitsbergen (Svalbard) glacier-derived runoff tracked by coralline algal Ba/Ca ratios. Climate Dynamics 56, 3295-3303. doi:10.1007/s00382-021-05642-x
Lamadrid, H.M., Zajacz, Z., Klein, F. and Bodnar, R.J. (2021) Synthetic fluid inclusions XXIII. Effect of temperature and fluid composition on rates of serpentinization of olivine. Geochimica Et Cosmochimica Acta 292, 285-308. doi:10.1016/j.gca.2020.08.009
Németh, B., Török, K., Bali, E., Zajacz, Z., Fodor, L. and Szabó, C. (2021) Melt-rock interaction in the lower crust based on silicate melt inclusions in mafic garnet granulite xenoliths, Bakony-Balaton Highland Volcanic Field (Hungary). Geologica Carpathica 72, 232-252. doi:10.31577/GeolCarp.72.3.4
Sendula, E., Lamadrid, H.M., Rimstidt, J.D., Steele-MacInnis, M., Sublett, D.M., Aradi, L.E., Szabó, C., Caddick, M.J., Zajacz, Z. and Bodnar, R.J. (2021) Synthetic Fluid Inclusions XXIV. In situ Monitoring of the Carbonation of Olivine Under Conditions Relevant to Carbon Capture and Storage Using Synthetic Fluid Inclusion Micro-Reactors: Determination of Reaction Rates. Frontiers in Climate 3. doi:10.3389/fclim.2021.722447
2020
Alex, A. and Zajacz, Z. (2020) A new method to quantitatively control oxygen fugacity in externally heated pressure vessel experiments. European Journal of Mineralogy 32, 219-234. doi:10.5194/ejm-32-219-2020
Chen, H.J., Pina, J.M., Yuan, F.L., Johnston, A., Ma, D.X., Chen, B., Li, Z.L., Dumont, A., Li, X.Y., Liu, Y.N., Hoogland, S., Zajacz, Z., Lu, Z.H. and Sargent, E.H. (2020) Multiple Self-Trapped Emissions in the Lead-Free Halide Cs3Cu2I5. Journal of Physical Chemistry Letters 11, 4326-4330. doi:10.1021/acs.jpclett.0c01166
Davis, D.W., Sutcliffe, C.N., Thibodeau, A.M., Spalding, J., Schneider, D., Cruden, A., Adams, J., Parmenter, A., Jensen, M. and Zajacz, Z. (2020) Hydrochronology of a proposed deep geological repository for low- and intermediate-level nuclear waste in southern Ontario from U-Pb dating of secondary minerals: response to Silurian and Cretaceous events. Canadian Journal of Earth Sciences 57, 464-476. doi:10.1139/cjes-2019-0004
Fu, S.L., Zajacz, Z., Tsay, A. and Hu, R.Z. (2020) Can magma degassing at depth donate the metal budget of large hydrothermal Sb deposits? Geochimica Et Cosmochimica Acta 290, 1-15. doi:10.1016/j.gca.2020.08.029
Hunter, E.A.O., Hunter, J.R., Zajacz, Z., Keith, J.D., Hann, N.L., Christiansen, E.H. and Dorais, M.J. (2020) Vapor Transport and Deposition of Cu-Sn-Co-Ag Alloys in Vesicles in Mafic Volcanic Rocks. Economic Geology 115, 279-301. doi:10.5382/econgeo.4702
Sutcliffe, C.N., Thibodeau, A.M., Davis, D.W., Al-Aasm, I., Parmenter, A., Zajacz, Z. and Jensen, M. (2020) Hydrochronology of a proposed deep geological repository for low- and intermediate-level nuclear waste in southern Ontario from U-Pb dating of secondary minerals: response to Alleghanian events. Canadian Journal of Earth Sciences 57, 494-505. doi:10.1139/cjes-2019-0005
2019
Askerka, M., Li, Z.L., Lempen, M., Liu, Y.A., Johnston, A., Saidaminov, M.I., Zajacz, Z. and Sargent, E.H. (2019) Learning-in-Templates Enables Accelerated Discovery and Synthesis of New Stable Double Perovskites. Journal of the American Chemical Society 141, 3682-3690. doi:10.1021/jacs.8b13420
Hetzinger, S., Halfar, J., Zajacz, Z. and Wisshak, M. (2019) Early start of 20th-century Arctic sea-ice decline recorded in Svalbard coralline algae. Geology 47, 963-967. doi:10.1130/g46507.1
Hou, A., Halfar, J., Adey, W., Wortmann, U.G., Zajacz, Z., Tsay, A., Williams, B. and Chan, P. (2019) Long-lived coralline alga records multidecadal variability in Labrador Sea carbon isotopes. Chemical Geology 526, 93-100. doi:10.1016/j.chemgeo.2018.02.026
Hsu, Y.J., Zajacz, Z., Ulmer, P. and Heinrich, C.A. (2019) Chlorine partitioning between granitic melt and H2O-CO2-NaCl fluids in the Earth’s upper crust and implications for magmatic-hydrothermal ore genesis. Geochimica Et Cosmochimica Acta 261, 171-190. doi:10.1016/j.gca.2019.07.005
Tuba, G., Kontak, D.J., Zajacz, Z. and Petrus, J.A. (2019) Bulk microanalysis of assemblages of small fluid inclusions by LA-ICP-MS: Methodology and application to orogenic gold systems. Chemical Geology 529. doi:10.1016/j.chemgeo.2019.119326
Zajacz, Z. and Tsay, A. (2019) An accurate model to predict sulfur concentration at anhydrite saturation in silicate melts. Geochimica Et Cosmochimica Acta 261, 288-304. doi:10.1016/j.gca.2019.07.007
Conference presentations
2024
Cacciatore, E. E., Tsay, A., & Zajacz, Z. (2024, November 8–9th). Experimental development of new oxybarometers based on V-Sc exchange between mafic minerals and hydrous silicate melts [Oral presentation]. 22nd Swiss Geoscience Meeting, Basel, Switzerland.
Espinel Pachón, I.M., Zajacz, Z., Schirra, M., Tsay, A. (2024, October 24th). Inclusiones fluidas y fundidas como herramienta para entender la evolución magmática-hidrotermal de depósitos tipo pórfido de Cobre [virtual presentation]. VIII Congreso Internacional de Geología del Sur (VIII GEOSUR 2024), Arequipa, Perú.
Espinel Pachón, I.M., Zajacz, Z., Schirra, M., Tsay, A. (2024, September 16th). Contenido de volátiles y metales en magmas formadores de depósitos tipo pórfido de cobre [ virtual presentation]. Seminario Geológico Geociencias y nuevos Rumbos en la Investigación Aplicada 2024, Cerro de Pasco, Perú
Farsang, S. & Zajacz, Z. (2024, August 18-23rd). Sulphur speciation in magmatic fluids: facts and artefacts [invited keynote presentation]. European Mineralogical Conference, Dublin, Ireland
Schirra, M. & Zajacz, Z. (2024, June 23-28th). The link between ultra-calcic magmas and alkalic-type epithermal gold deposits: Melt inclusion evidence from Lihir Island, Papua New Guinea, and Cripple Creek, USA. Gordon Research Conference Geochemistry of Mineral Deposits, Newry, USA.
Zajacz, Z. and Farsang, S. (2024, April 14-19). Redox dependent sulfur partitioning between liquid and vapor: implications for magmatic-hydrothermal ore genesis and volcanic degassing [oral presentation]. EGU General Assembly 2024, Vienna, Austria, https://doi.org/10.5194/egusphere-egu24-13176
2023
Gennaro, I., Tsay, A., Schirra, M., Zajacz, Z. (2023, November 17–18th). Experimental determination of cation exchange coefficients to facilitate the prediction of Fe and Ca abundances in primary magmatic fluids [oral presentation]. 21st Swiss Geoscience Meeting, Mendrisio, Switzerland.
Espinel Pachón, I.M., Zajacz, Z., González Ródriguez, C., Schirra, M., Tsay, A., Li,W., Miranda,M. (2023, November 17–18th). Redox state, sulfur and chalcophile element budgets during magma differentiation in thick continental crust: a case study on the Parinacota volcano [oral presentation]. 21st Swiss Geoscience Meeting, Mendrisio, Switzerland.
Schirra, M., Zajacz, Z. & Müller, D. (2023, November 17-18th). The gold endowment of alkaline melts: Insights from LA-ICP-MS analysis of silicate melt inclusions. 21st Swiss Geoscience Meeting, Mendrisio, Switzerland.
Espinel Pachón, I.M., Zajacz, Z., González Ródriguez, C., Schirra, M., Tsay, A., Li,W., Miranda,M. (2023, August 28th–September 1st). Redox state, sulfur and chalcophile element budgets during magma differentiation in thick continental crust: a case study on the Parinacota volcano [oral presentation]. 17th Biennial SGA Meeting, ETH Zurich, Switzerland.
Schirra, M., Müller, D. & Zajacz, Z. (2023, August 28-31st). Alkalic epithermal Au deposits: Insights into magma evolution and ore fertility using silicate melt inclusions from Lihir Island, Papua New Guinea. 17th SGA biennial meeting, Zürich, Switzerland.
Cacciatore, E. E., Tsay, A., & Zajacz, Z. (2023, July 9–14th). Experimental development of new oxybarometers based on V-Sc exchange between mafic minerals and hydrous silicate melts [Poster presentation]. Goldschmidt 2023 Conference, Lyon, France.
Farsang, S. & Zajacz, Z. (2023, July 9-14th). The effect of temperature on sulphur speciation in magmatic fluids and its implications for magma redox and ore genesis [oral presentation]. Goldschmidt 2023 Conference, Lyon, France. https://doi.org/10.7185/gold2023.14296
Zajacz, Z. (2023, July 9-14th). Volatile Element and Chalcophile Metal Behavior during Magma Differentiation in Transcrustal Systems: Implications for Magma Fertility for Porphyry Ore Genesis [oral keynote presentation]. Goldschmidt 2023 Conference, Lyon, France. https://doi.org/10.7185/gold2023.17671
Gennaro, I., Tsay, A., Schirra, M., Zajacz, Z. (2023, July 9–14th). The effects of chlorine and melt aluminosity on ore-forming potential in arc-related magmatic-hydrothermal systems [oral presentation]. Goldschmidt Conference 2023, Lyon, France. https://doi.org/10.7185/gold2023.17699
Miranda, M., Schirra, M., Tsay, A., Zajacz, Z. (2023, July 9-14th). Development of new methods to track magma degassing and fluid fluxing in complex magmatic systems based on halogen ratios [Oral presentation]. Goldschmidt 2023 Conference, Lyon, France. https://doi.org/10.7185/gold2023.17011
Schirra, M., Müller, D. & Zajacz, Z. (2023, July 9-14th). The evolution of a trans-crustal alkaline magma system and its implications for epithermal Au mineralization: A case study from Lihir Island, Papua New Guinea [oral presentation]. Goldschmidt 2023 Conference, Lyon, France.
Farsang, S. & Zajacz, Z. (2023, July 2- 6th). The effect of salinity on sulphur speciation in magmatic fluids and its implications for magma redox and ore genesis [oral presentation]. European Current Research on Fluid and Melt Inclusions, Reykjavik, Iceland
Zajacz, Z., Miranda, M., Tsay, A. (2023, July 2- 6th). Developments to increase the utility of silicate melt inclusions in understanding volatile element systematics in arc magmas [oral keynote presentation]. European Current Research on Fluid and Melt Inclusions, Reykjavik, Iceland
Cacciatore, E. E., Tsay, A., & Zajacz, Z. (2023, June 12–15th). Experimental development of new oxybarometers based on V-Sc exchange between mafic minerals and hydrous silicate melts [Oral presentation]. 18th International Symposium on Experimental Mineralogy, Petrology, and Geochemistry (EMPG), Milan, Italy.
Farsang, S. & Zajacz, Z. (2023, June 12–15th). The effect of oxygen fugacity on sulphur speciation in magmatic fluids based on in situ Raman spectroscopy experiments at elevated P-T [oral presentation]. International Symposium on Experimental Mineralogy, Petrology, and Geochemistry (EMPG), Milan, Italy
Gennaro, I., Tsay, A., Schirra, M., Zajacz, Z. (2023, June 12–15th). Towards a quantitative model for the prediction of fluid/melt partitioning of ore metals in porphyry systems: The effect of chlorine and melt aluminosity [oral presentation]. 18th International Symposium on Experimental Mineralogy, Petrology, and Geochemistry (EMPG), Milan, Italy.
Miranda, M., Tsay, A., Schirra, M., Zajacz, Z. (2023, June 12-15th). Tracking magma degassing and fluid fluxing in complex magmatic systems [Poster presentation]. 18th International Symposium on Experimental Mineralogy, Petrology, and Geochemistry (EMPG), Milan, Italy.
2022
Espinel Pachón, I.M., Zajacz, Z., González Ródriguez, C., Schirra, M., Tsay, A., Li,W., Miranda,M. (2022, December 7th). Controlling the redox evolution of arc magmas on continental margins: an approach using melt inclusions [oral presentation]. SGA Prague Christmas meeting, Charles University, Prague, Switzerland.
Miranda, M., Zajacz, Z. (2022, November 18-20th). Development of new methods to track magma degassing and fluid fluxing in complex magmatic systems: The study of heavy halogens [Oral presentation]. 20th Swiss Geosciences Meeting 2022, Lausanne, Switzerland.
Cacciatore, E. E., Tsay, A., & Zajacz, Z. (2022, October 21st). The development of new magmatic oxybarometers to assist with regional-scale exploration for magmatic-hydrothermal ore deposits [Oral presentation]. DPMS Day, Bern, Switzerland.
Cacciatore, E. E., Tsay, A., & Zajacz, Z. (2022, September 13–16th). The development of new magmatic oxybarometers to assist with regional-scale exploration for magmatic-hydrothermal ore deposits [Oral presentation]. Sustainable Mineral Resources Supply Conference, Geneva, Switzerland.
Gennaro, I., Zajacz, Z. (2022, September 13–16th). Cation exchange and ore-forming potential in Cl-bearing upper-crustal magmatic-hydrothermal systems: Preliminary results [oral presentation]. Sustainable Mineral Resources Supply Conference, Geneva, Switzerland.
Zajacz, Z. (2022, Sept. 11-15th) Towards quantitative understanding of volatile and metal release from magmas [oral keynote presentation]. GeoMinKöln 2022, Cologne, Germany. https://www.dmg-home.org/fileadmin/user_upload/Konferenzen/GeoMinKoeln/Volume_of_Abstracts_GeoMinKoeln2022_lores.pdf
Farsang, S. & Zajacz, Z. (2022, July 18- 22nd). S species in lazurite and haüyne revealed by resonance Raman spectroscopy: S2–, S3– & S42– [poster presentation]. International Mineralogical Association General Meeting, Lyon, France
Schirra, M. & Zajacz, Z. (2022, May 22-27nd). Controls on the ore fertility of alkaline magmas associated with epithermal Au mineralizing systems: First insights from melt inclusions from the Lihir Island [poster presentation]. Gordon Research Conference Geochemistry of Mineral Deposits, Barcelona, Spain.
2020
Zajacz, Z., Tsay A. and Ghazali, N. (2020, June 21-26). Redox Control on Sulfur Mobility in the Magmatic-Hydrothermal Ore-Forming Environment [invited oral/video presentation]. Goldschmidt Virtual 2020 Conference, https://doi.org/10.46427/gold2020.3066