Fred Jourdan

Fred Jourdan

Curriculum vitae (pdf)



Fred Jourdan is a geochronologist and geochemist. He developed his skills during his Master (University of Geneva, Switzerland), his PhD (University of Nice-Sophia Antipolis, France) and his current postdoctoral (Berkeley Geochronology Center and University of Berkeley; USA) research. During his education and training, he has used noble gas (40Ar/39Ar), thermal ionization and MC-ICP mass spectrometers. He has also performed experiments on microprobe and LA-ICPMS (University of Lausanne, Switzerland) and He has been strongly committed to work in clean laboratory (ionic exchange columns, acid preparations, chemical abrasion and thermal annealing).

His research has been performed in collaboration with various internationally reputed scientists: P. Renne, R. Mundil and J. Matzel (BGC, Berkeley); J. Christensen (University of Berkeley), B. Weiss (MIT and CalTech) , W.U. Reimold (South Africa) ; J.G. MacHone (Connecticut); L. Tanner (Syracuse, New-York); S. Cirilli (Trieste, Italy) ; D. Contak (Halifax, Nova Scotia); G. Feraud and C. Verati (Nice, France); H. Bertrand and J. Blichert-Toft (ENS, France); A. Marzoli (Padova, Italy); Mike Watkeys (Durban, South Africa); B. Le Gall (Brest, France); M. Cosca and F. Bussy (Lausanne, Switzerland) and M. Dungan (Geneva; Switzerland).

His work focuses on:

(1) 40Ar/39Ar dating and isotopic geochemistry of large igneous provinces

(2) 40Ar/39Ar "speedy-step heating" dating applied to structural inheritance of giant dike swarms in large igneous provinces.

(3) 40Ar/39Ar and U/Pb dating and isotopic geochemistry of subduction-related dike swarms

(4) Dating of impact craters

(5) 40Ar/39Ar methodological development (standard calibrations, 39Ar and 37Ar recoil and K decay constant)


Selected Publications

F. Jourdan, Féraud, G., Bertrand, H., Kampunzu, A.B., Tshoso, G. Watkeys, M.K. & Le Gall, B. Reply to Comment on “The Karoo large igneous province: Brevity, origin, and relation with mass extinction questioned by new 40Ar/39Ar age data” by Teal R. Riley, Philip T. Leat, Michael L. Curtis. Geology (in press)

F. Jourdan, C. Verati, G. Feraud, Intercalibration of the Hb3gr 40Ar/39Ar dating standard. Chemical Geology (in press).

F. Jourdan, Féraud, G., Bertrand, H., Watkeys, M.K., Kampunzu, A.B., Le Gall, B. Basement control on dyke distribution in Large Igneous Provinces: Case study of the Karoo triple junction. Earth and Planetary Sciences Letters 241, p. 307-322, 2006.

F. Jourdan, Féraud, G., Bertrand, H., Kampunzu, A.B., Tshoso, G. Watkeys, M.K. & Le Gall, B. The Karoo Large Igneous Province: brevity, origin and relation with mass extinction in question from new 40Ar/39Ar age data, Geology 33, p. 745-748, 2005.

Le Gall B., Tshoso, G., Dyment, J. Kampunzu, A. B., Jourdan, F., Féraud, G., Bertrand, H., Aubourg, C, Structure of the Okavango giant mafic dyke swarm (NE Botswana) and its significance within the Karoo large igneous province of southern Africa, Journal of structural geology 27, p. 2234-2255, 2005.

F. Jourdan, G. Féraud, H. Bertrand, A.B. Kampunzu, G. Tshoso, B. Le Gall, J.J. Tiercelin, P. Capiez, The Karoo triple junction questioned : evidence from 40Ar/39Ar Jurassic and Proterozoïc ages and geochemistry of the Okavango dyke swarm (Botswana)., Earth and Planetary Sciences Letters 222, p. 989-1006, 2004.

F. Jourdan, A. Marzoli, H. Bertrand, M. Cosca, D. Fontignie., The northernmost CAMP: Ar/Ar age, petrology and Sr-Nd-Pb isotope geochemistry of the Kerforne dyke, Brittany, France., in: The Central Atlantic Magmatic Province, W. Hames, J.G. McHone, C. Rupel, P.R. Renne, ed. 136, pp. 209-226, AGU Monograph, 2003.

B. Le Gall, G. Tshoso, F. Jourdan, G. Féraud, H. Bertrand, J.J. Tiercelin, A.B. Kampunzu, M.P. Modisi, J. Dyment, M. Maia., 40Ar/39Ar geochronology and structural data from the giant Okavango and related mafic dyke swarms, Karoo igneous province, Botswana, Earth and Planetary Science Letters 202, p. 595-606, 2002.