Paul Alexandre

B.Sc., M.Sc., M.Sc., Ph.D., P.Geo.

paul-alexandre-stonecity

Professional Associate III

Department of Geology

Academic Credentials

PhD: Université de Loraine, France, 2000, Geochronology (Summa cum laude)
Thesis: Tectonic evolution of two segments of the European Variscan Belt: North Limousin and Eastern Pyrenees: 40Ar/39Ar and U-Pb geochronology

MSc: Université de Loraine, France, 1997, Exploration Geochemistry
Thesis: K-Ar geochronology, petrology, mineralogy and mineral chemistry, and whole rock geochemistry of the Indian emerald deposits (Rajasthan Emerald Belt)

MSc: Université de Nancy, France, 1996, Mineral Exploration
Thesis: Petrography, mineralogy, mineral chemistry, and whole rock geochemistry of the Montou and Sotison volcanics-hosted skarn copper deposits in France

BSc: Université de Lyon, France, 1995, Geology
Thesis: Petrology and mineralogy of the Montou and Sotison volcanics-hosted skarn copper deposits in France

Teaching

Introduction to Geophysics (42:269)

Continents Adrift (42:266)

Earth's Resources (42:271)

Introduction to Geochemistry (42:366)

Field School (42:333)

Research Interests

Economic Geology, Metallogeny, Mineral Exploration

  • VMS deposits (Flin Flon - Snow Lake belt)
  • Uranium deposits (unconformity-related, Na-metasomatism-related, sandstone hosted; exploration methods)
  • Gold deposits (Central France, SE Manitoba)
  • Emerald deposits (pegmatite type)

 

Geochronology

  • Applied geochronology (deposit studies, orogenic evolution)
  • Theoretical developments (thermochronology, data interpretation)

 

Geochemistry

  • Stable isotopes applied to mineral explpration
  • Radiogenic isotopes applied to metallogeny
  • Lithogeochemistry applied to deposit studies

 

Mineralogy

  • Mineral chemistry (emerald, uraninite, high-Cr minerals, clay minerals)
  • Crystallography (zircon, uraninite)
Peer-reviewed Publications

Alexandre P., Kyser K., Layton-Matthews D., Joy B., and Uvarova Y. (2016) Chemical composition of natural uraninite. Canadian Mineralogist, 53, 1-30.

Alexandre P., Peterson R., and Joy B. (2016) Sector zoning in uraninite. Canadian Mineralogist, doi:10.3749.

Villarreal-Fuentes J., Levresse G., Nieto-Samaniego A.F., Alexandre P., and Corona-Esquivel R. (2016) Geochemistry and geochronology of the Sierra de Gomez Limestone-hosted U deposit, Chihuahua: Implications for distribution of Rio Grande rift mineral deposits in northern Mexico. Ore Geology Reviews, 76, 19–34.

Alexandre P., Kyser K., Layton-Matthews D., Beyer S.R., Hiatt E.E., Lafontaine J. (2015) Formation of the enigmatic Matoush uranium deposit in the Paleoprotozoic Otish Basin, Quebec, Canada. Mineralium Deposita 50, 825-845.

Alexandre P., Peterson R.C., Kyser, K., Layton-Matthews D., and Joy, B (2014) High-Cr minerals from the Matoush uranium deposit in the Otish Basin, Quebec, Canada. Canadian Mineralogist, 52, 61-75.

Le Carlier de Veslud C., Alexandre P., Ruffet G., Cuney M., Cheilletz A. (2013) A two-stage exhumation in the Western French Massif Central: new geochronological evidence of syn-collisional extension. Lithos 175, 1-15.

Ng R., Alexandre P., Kyser K. (2013) Mineralogical and geochemical evolution of the unconformity-related McArthur River Zone 4 ore body in the Athabasca Basin, Canada: Implications of a silicified zone. Economic Geology, 108, 1657-1689.

Ng R., Alexandre P., Kyser K., Cloutier J., Yassir A. Abdu Y.A., and Hawthorne F.C. (2013) Oxidation state of iron in alteration minerals associated with sandstone-hosted unconformity-related uranium deposits and apparently barren alteration systems in the Athabasca Basin, Canada: Implications for exploration. Journal of Geochemical Exploration, in press.

Polito P., Kyser K., Alexandre P., Hiatt E.E., and Stanley C.R. (2011) Advances in understanding the Kombolgie Subgroup and unconformity-related uranium deposits in the Alligator Rivers Uranium Field and how to explore for them using lithogeochemical principles. Australian Journal of Earth Sciences, 58, 453–474.

Alexandre P., Kyser K., Jiricka D., and Witt G. (2012) Formation and evolution of the Centennial unconformity-related uranium deposit in the south-central Athabasca Basin, Canada. Economic geology, 107, 385–400.

Alexandre P., Uvarova Y., and Kyser K. (2012) Origin of uranous and uranyl minerals at the Centennial deposit, Athabasca Basin, northern Saskatchewan, Canada. Canadian Mineralogist, 50, 693-704.                           

Beyer S.R. Kyser K., Hiatt E.E., Polito P.A., Alexandre P., and Hoksbergen K. (2012) Basin evolution and unconformity-related uranium mineralization: the Camie River U prospect, Paleoproterozoic Otish Basin, Quebec. Economic Geology, 107, 401–425.

Alexandre P. (2011) Comparison between grain size and multi-mineral 40Ar/39Ar thermochronology. Geochimica et Cosmochimica Acta, 75, 4260–4272.

Cloutier J., Kyser K., Olivo G.R., and Alexandre P. (2010) Contrasting patterns of alteration at the Wheeler River area, Athabasca Basin, Saskatchewan, Canada: insights into the apparently uranium-barren zone K alteration system. Economic Geology, 105, 303-324.

Alexandre P. (2010) Mineralogy and geochemistry of the Aricheng Na metasomatism-type uranium occurrence, Guyana. Mineralium Deposita, 45, 351-367.

Cloutier J., Kyser K., Olivo G., Alexandre P. (2009) The Millennium uranium deposit, Athabasca Basin, Saskatchewan, Canada: an atypical basement-hosted unconformity-related uranium deposit. Economic Geology, 104, 815–840.

Alexandre P., Kyser K., and Jiricka D. (2009) Critical geochemical and mineralogical factors for the formation of unconformity-related uranium deposits: comparison between barren and mineralized systems in the Athabasca Basin, Canada. Economic Geology, 104, 413-435.

Alexandre P., Kyser K., Thomas D., Polito P., Marlat J. (2009) Geochronology of unconformity-related uranium deposits in the Athabasca Basin, Saskatchewan, Canada and their integration in the evolution of the basin. Mineralium Deposita, 44, 41–59.

Carney J.N., Alexandre P., Pringle M.S., Pharaoh T.C., Merriman R.J., and Kemp S.J. (2008) 40Ar-39Ar isotope constraints on the age of deformation in Charnwood Forest, UK. Geological Magazine, 145, 702-713.

Alexandre P. (2007) U-Pb zircon SIMS ages from the French Massif Central and implication for the pre-Variscan tectonic evolution in Western Europe. Comptes Rendus de l’Académie des Sciences Paris, 339, 613-612.

Alexandre P., Andreoli M.A.G., Jamison A., and Gibson R. (2007) Response to the Comment by Reimold et al. on 40Ar/39Ar age constraints on low-grade metamorphism and cleavage development in the Transvaal Supergroup (central Kaapvaal Craton, South Africa): implications for the tectonic setting of the Bushveld Igneous Complex (South African Journal of Geology, 109, 393-410), by Alexandre et al. (2006). South African Journal of Geology, 110, 160-162.

Alexandre P., Andreoli M.A.G., Jamison A., and Gibson R. (2006) 2042 Ma Low-grade metamorphism in the Transvaal Supergroup (Central Kaapvaal Craton, South Africa): precise 40Ar/39Ar dating and implications for the tectonic setting of the Bushveld Igneous Complex. South African Journal of Geology, 109, 393-410.

Alexandre P. and Kyser T.K. (2006) Geochemistry of uraniferous bitumen in the Athabasca Basin, Saskatchewan. Economic Geology, 101, 1605-1612.

Alexandre P., Kyser K., Polito P.A., Sopuck V., and Thomas D. (2005) Alteration mineralogy and stable isotope geochemistry of Paleoproterozoic basement-hosted unconformity-type uranium deposits in the Athabasca Basin, Canada. Economic Geology, 100, 1547-1563.

Tikhomirov P.L., Akinin V.V., Ispolatov V.O., Alexandre P., Cherepanova I.Yu., and Zagoskin V.V. (2005) The age of the northern part of the Okhotsk-Chukotka volcanic belt: new Ar-Ar and U-Pb data. Stratigrafiya. Geologicheskaya korrelyatsiya (Stratigraphy. Geologic correlation), Moscow [in Russian]

Alexandre P. and Kyser T.K. (2005) Effects of cationic substitutions and alteration of uraninite, and implications for the dating of uranium deposits. Canadian Mineralogist , 43, 1005-1017.

Alexandre P., Chalot-Prat F., Siantot, A., Wijbrans J., Stephenson R., Wilson M., Kitchka A., and Stovba S. (2004) 40Ar/39Ar dating of magmatic activities in the Donbas Foldbelt and the Scythial Platforn (Eastern European Craton). Tectonics, 23(5), TC5002

Polito P.A., Kyser T.K., Marlatt J., Alexandre P., Bajwah Z., and Drever G. (2004) Significance of alteration assemblages for the origin and evolution of the Proterozoic Nabarlek unconformity-related uranium deposit, Northern Territory, Australia – A reply. Economic Geology, 99(5), 1045-1048

Polito P.A., Kyser T.K., Marlatt J., Alexandre P., Bajwah Z., and Drever G. (2004) Significance of alteration assemblages for the origin and evolution of the Proterozoic Nabarlek unconformity-related uranium deposit, Northern Territory, Australia. Economic Geology, 99 (1), 113-139.

Le Carlier de Veslud C., Alexandre P., Cuney M., Ruffet G., Cheilletz A., and Virlogeux D. (2004) 40Ar/39Ar thermochronology and thermal evolution of Meso-Variscan  granitoids of the Charroux-Civray plutonic complex ("Seuil du Poitou"). Bulletin de la Société Géologique de France, 175(2): 147-156.

Kyser K., Chipley D., Bukata A., Polito P., Fitzpatrick A., and Alexandre P. (2003) Application of laser ablation and high resolution ICPMS to the analysis of metal contents in tree rings, ages of uranium-rich minerals and Se content in sulphide ores. Canadian Journal of Analytical Sciences and Spectroscopy, 48 (5), 258-268.

P. Alexandre, C. Le Carlier de Veslud, M. Cuney, G. Ruffet, D. Virlogeux, and A. Cheilletz (2002) 40Ar/39Ar dating of leucogranites in the sediment-covered Charroux-Civray complex (Vienne). Comptes Rendus Geoscience, 334, 1141-1148.

Cuney M., Alexandre P., Le Carlier de Veslud C., Cheilletz A., Raimbault L., Ruffet G., and Scaillet S. (2002) The timing of W-Sn-Rare Metals mineral deposit formation in the Western Variscan chain in their orogenic setting: the case of the Limousin area (Massif Central, France). In: Blundell, D., Neubauer, F. & von Quadt, A. (eds), The timing and location of major ore deposits in an evolving orogen.  Geological Society, London, Special Publications 204, 213-228.

Alexandre P., Ruffet G., and Cheilletz A. (2002) Muscovite recrystallization and saddle-shaped 40Ar/39Ar age spectra: example from the Blond granite (Massif Central, France). Geochimica et Cosmochimica Acta, 66 (10), 1793-1807.

Deloule E., Alexandre P., Cheilletz A., Laumonier B., and Barbey P. (2002) In-situ U-Pb zircon ages for Early Ordovician magmatism in the eastern Pyrenees, France: the Canigou orthogneisses. International Journal of Earth Sciences (Geologische Rundschau), 91, 398-405.

Kagou Dongmo A., Wandji P., Pouclet A., Vicat J.P., Cheilletz A., Guimolaire Nkouathio D., Alexandre P., and M. Tchoua F. (2001) Volcanological evolution of the mount Manengouba (Cameroon line), new petrographical, geochemical, and geochronological data. Comptes Rendus de l'Academie des Sciences Paris, 333, 155-162.

Alexandre P., Giuliani G., and Zimmerman, J.L. (2001) Mineralogy, Age and Fluid Geochemistry of the Rila Emerald Deposit (Bulgaria). Economic Geology, 96, 1469-1476.

Alexandre P., Floc'h J.P., Cuney M., and Cheilletz A. (2001) Datation U-Pb à la microsonde ionique des zircons de l'Unité Supérieure des Gneiss dans le Sud Limousin, Massif Central. Comptes Rendus de l'Academie des Sciences Paris, 332, 625-632.

Alexandre P., Royer J.J., and Deloule E. (2001) 331 ± 9 Ma emplacement age of the Soultz monzogranite (Rhine Graben basement) by U/Pb ion-probe zircon dating of samples from 5km depth. Comptes Rendus de l'Academie des Sciences Paris, 332, 747-754.

Alexandre P. (2001) Synneusis of zircon: why not? Mineralogical Magazine, 65 (1) 71 - 79.

Le Carlier de Veslud C., Cuney M., Royer J.J., Floc'h J.P., Améglio L., Alexandre P., Vigneresse J.L., and Itard Y. (2000) Relationship between granitoids and mineral deposits: three-dimensional modelling of the Variscan Limousin Province (NW French Massif Central). Transactions of the Royal Society of Edinburgh: Earth Sciences, 91, 283-301.

Alexandre P., Cheilletz A., Deloule E., and Cuney M. (2000) 319 ± 7 Ma crystallisation age for the Blond granite (Northwest Limousin, French Massif Central) obtained by U-Pb ion-probe dating of zircons. Comptes Rendus de l'Academie des Sciences Paris, 330, 617 - 622.

Giuliani G., France-Lanord C., Coget P., Schwarz D., Cheilletz A., Branquet Y., Giard D., Martin-Izard A., Alexandre P., and Piat D.H. (1998) Oxygen isotope systematics of emerald: relevance for its origin and geological significance. Mineralium Deposita 33, 513 - 519.

Previous Positions

Research Associate, Queen's University (Kingston, Canada) 2009-2015

Consultant, Rio Tinto, 2011-2015

Associate Professor, Queen's University (Kingston, Canada) 2006-2009

Laboratory Manager, University of Glasgow (Glasgow, UK), 2004-2006

Post-Doctoral Fellow, Queen's University (Kingston, Canada) 2000-2004

Mine Geologist, Chuquicamata copper mine (Chile) 1997

Contact

Address:

Department of Geology
Brandon University
John R. Brodie Science Centre
270 – 18th Street
Brandon, Manitoba
R7A 6A9

Phone: (204) 727-9693
Cell: (204) 573 2705
Fax: (204) 728-7346
Email: Paul.Alexandre@brandonu.ca

 

Links