Harquail Family Invests $10M in Earth Sciences

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Pedro J. Jugo (Program Coordinator PhD in Mineral Deposits and Precambrian Geology)

Associate Professor, Igneous Petrology

B.Sc. (Central de Venezuela)
M.Sc. (Maryland)
Ph.D. (Alberta)


Harquail School of Earth Sciences
Laurentian University
Sudbury, Ontario
P3E 2C6
Telephone: (705) 675-1151 x2106Email:

Research Interests

  • Genesis of orthomagmatic and hydrothermal ore deposits.
  • Metasomatic processes and how they affect the chemistry and mineralogy of magmas.
  • Volatiles in magmas, volcanic degassing.
  • Geochemistry of highly siderophile elements (Ru, Rh, Pd, Re, Os, Ir, Pt, Au) in magmatic systems.
  • Sulfide-sulfate equilibria in silicate melts.
  • Available Research Opportunities

Sulphide-sulfate equilibria, sulfur content and sulfur speciation in silicate melts as function of oxidation state and melt composition.
Diffusion and mechanisms of nucleation of highly siderophile elements (HSE) in silicate melts.
Current PhD Graduate Students

Current M.Sc. students

Luis Alfonso Arteaga [co-supervised with Dr. Daniel Kontak]
Temporal and spatial relationship between gold mineralization and intrusive rocks in the Boston Creek area, Abitibi Greenstone Belt, ON.

Michael Langa
Looking for geochemical markers to identify and differentiate among chromitite cycles.

Evan Keir-Sage [co-supervised with Dr. Matthew Leybourne]
Metamorphism and alteration of footwall rocks associated with the Platreef PGE complex, South Africa

Ashley Kirwan (Applied MSc candidate in Mineral Exploration)
Lithological controls on gold mineralization of the Loma Larga high-sulfidation epithermal deposit, Azuay province, Ecuador.

Current PhD students 

Moosa Khanyi [co-supervised with Dr. Matthew Leybourne]
Regional geological setting and comparison of the Platreef PGE mineralization with the Bushveld Complex, South Africa

Past PhD students

Dr. Fabio Cafagna
B.Sc. Experimental and analytical studies of S and PGEs in silicate glasses and minerals. [Jugo / McDonald]

Representative Publications

Refereed Papers

Cafagna F and Jugo PJ (2016) An experimental study on the geochemical behavior of highly siderophile elements (HSE) and metalloids (As, Se, Sb, Te, Bi) in a mss-iss-pyrite system at 650 °C: A possible magmatic origin for Co-HSE-bearing pyrite and the role of metalloid-rich phases in the fractionation of HSE. Geochimica et Cosmochimica Acta 179:233-258.

Adibpour M, Jugo PJ, Ames DE (2015) Trace element distribution in sulphide assemblages of the Levack-Morrison ore system, Sudbury, Ontario: Looking for chemical fingerprints of mineralization processes
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Botcharnikov RE, Linnen RL, Wilke M, Holtz F, Jugo PJ, Berndt J (2010) High gold concentrations in sulphide-bearing magma under oxidizing conditions
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Jugo PJ, Wilke M, Botcharnikov RE (2010) Sulfur K-edge XANES analysis of natural and synthetic basaltic glasses: Implications for S speciation and S content as function of oxygen fugacity. Geochimica and Cosmochimica Acta. 74: 5926-5938. doi: 10.1016/j.gca.2010.07.022. Download PDF

Walton EL, Jugo PJ, Herd CDK, Wilke M (2010) Martian regolith in Elephant Moraine 79001 Shock Melts? Evidence from major element composition and sulfur speciation. Geochimica and Cosmochimica Acta. 74: 4829-4843. doi: 10.1016/j.gca.2010.04.065. Download PDF

Ulrich T, Kamber BS, Jugo PJ, Tinkham DK (2009) Imaging element-distribution patterns in minerals by laser ablation – inductively coupled plasma – mass spectrometry (LA–ICP–MS). The Canadian Mineralogist 47: 1001-1012. doi: 10.3749/Canmin. Download PDF

Jugo, PJ, 2009, Sulfur content at sulfide saturation in oxidized magmas. Geology. 37: 415-418. doi: 10.1130/G25527A.1. Download PDF

Wilke, M., Jugo, PJ, Klimm, K., Susini, J., Botcharnikov, R., Kohn, S.C., Janousch, M., 2008 The origin of S4+ detected in silicate glasses by XANES. American Mineralogist. 93: 235-240. Download PDF

Woodland, A.B., Jugo, PJ, 2007, A complex magmatic system beneath the Devès volcanic field, Massif Central, France: evidence from clinopyroxene megacrysts. Contributions to Mineralogy and Petrology. 153 (6): 719-731. Download PDF

Jugo, PJ, Luth, R.W., and Richards, J.P., 2005, An experimental study of the sulfur content in basaltic melts saturated with immiscible sulfide or sulfate liquids at 1300 ºC and 1.0 GPa. Journal of Petrology. 46: 783-798. Download PDF

Jugo, PJ, Luth, R.W., and Richards, J.P., 2005, Experimental data on the speciation of sulfur as a function of oxygen fugacity in basaltic melts. Geochimica and Cosmochimica Acta. 69: 497-503. Download PDF

Jugo, PJ, Candela, P.A., and Piccoli, P.M., 1999, Magmatic sulfides and Au:Cu ratios in porphyry deposits: an experimental study of copper and gold partitioning at 850 ºC, 100 MPa in a haplogranitic melt-pyrrhotite-intermediate solid solution-gold metal assemblage, at gas saturation. In: Granites; crustal evolution and associated mineralization. AN Sial; WE Stephens and VP Ferreira (Eds.) Lithos 46: 573-589. Download PDF


Jugo, PJ, Wilke M, Botcharnikov RE (2008) Sulfur speciation in natural and experimental silicate glasses determined by XANES: Implications for S behavior in magmatic systems. GAC-MAC-SEG-SGA Joint Annual Meeting, May 26-28, 2008; Quebec City, Canada.

Wilke M, Botcharnikov RE, Jugo, PJ (2008) Sulfur and Iron oxidation state in quenched melts as a function of oxygen fugacity. European Geophysical Union, General Assembly, April 13-18, 2008, Vienna, Austria. Geophysical Research Abstracts, Vol. 10, EGU2008-A-10559.

Botcharnikov RE, Wilke M, Jugo, PJ, F. Holtz F (2008) Experimental constraints on the redox and compositional control of S solubility in hydrous felsic to mafic magmas. European Geophysical Union, General Assembly, April 13-18, 2008, Vienna, Austria. Geophysical Research Abstracts, Vol. 10, EGU2008-A-10859.

Walton EL, Jugo, PJ, Herd CDK (2008) The nature and origin of localized shock melts in Martian meteorites: Major and trace element composition, sulfur speciation and texture of EET 79001 shock melt veins and pockets. 39th Lunar and Planetary Science Conference, March 10-14, League City, Texas, USA. Abstract 1880.

Wilke M, Jugo PJ, Botcharnikov R, Susini J (2007) Sulfur speciation in glasses by Micro-XANES – the nature of S(IV+) in glasses. Goldschmidt conference, Cologne, Germany, 19-24 August, 2007.

Jugo PJ, Wilke M, Woodland AB (2007) A model to predict changes in S solubility in silicate melts with changes in oxygen fugacity. AGU Spring Meeting, Acapulco, Mexico, 22-25 May, 2007.

Wilke M, Jugo PJ, Susini J (2007) Sulfur speciation in synthetic and natural glasses using XANES at the S K-edge. Sulfur in glasses and melts workshop; Hannover, Germany, 1-2 March, 2007.

Jugo PJ, Wilke M, Woodland AB (2007) Constraints on the maximum sulfur content in silicate melts in the transition from sulfide- to sulfate-dominated systems. Sulfur in glasses and melts workshop; Hannover, Germany, 1-2 March, 2007.

Jugo PJ and Wilke M (2006) Synchrotron studies of sulfur speciation in silicate glasses: Implications for the sulfur content of magmatic systems. GSA annual meeting, Abstracts with Programs, 38; 7.
Wilke M, Jugo PJ, Farges F, Schmidt C, Susini J, and Simionovici A (2006) Determination of oxidation state and speciation in geological relevant systems using XANES. European Conference on X-Ray Spectrometry (EXRS), Paris, France, June 19-23, 2006.

Jugo PJ (2005) Sequential assimilation of anhydrite and carbon: a viable mechanism for sulfide precipitation at Noril’sk? 10th International Platinum Symposium, Oulu, Finland, August 7-11, 2005.

Jugo PJ, and Woodland, AB (2005) Sulfide stability as a function of oxidation state and melt alkalinity: A geochemical explanation for the link between Au-rich deposits and alkaline suites. Gordon Research Conference in Inorganic Geochemistry (Metals in Ore-Forming Systems: Sources, Transport, Deposition). Andover, USA, July 31-August 5, 2005.

Jugo PJ, Luth RW, Richards JP, Sylvester PJ, and Tubrett MN, (2005) Experimental determination of the solubilities of Ir, Pt, Pd and Au in sulfide- and sulfate-saturated basaltic melts at 1300 ºC and 1 GPa: Implications for HSE fractionation in subduction zones. EGU, Vienna, Austria. Geophys. Res. Abstracts, v. 7, 04879. SRef-ID: 1607-7962/gra/EGU05-A-04879.

Jugo PJ, Luth RW, and Richards JP (2003) Generation of sulfur-rich, sulfur-undersaturated basaltic melts in oxidized arc sources. Eos. Trans. AGU, 84(46), Fall Meet. Suppl., Abstract V32F-08, 2003.

Jugo PJ, Luth RW, and Richards JP, (2001) Experimental determination of sulfur solubility in basaltic melts at sulfide vs. sulfate saturation: Possible implications for ore formation. Eos. Trans. AGU, 82 (47), Fall Meet. Suppl., Abstract V32G-05, 2001.