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Dr. Yann Lahaye

Wissenschaftlicher Mitarbeiter

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Hinweis: Diese Seite wird nicht mehr aktualisiert (Stand Mai 2008).

Dr. Yann Lahaye hat seit Mai 2008 eine Anstellung in Helsinki/Finnland.

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Lebenslauf

• 2000 – Now: WissenschaftlicherMitarbeiter, University of J.W. Goethe, Institute Für Mineralogie, Frankfurt, Germany.
• 1996 – 2000: Wissenschaftlicher Mitarbeiter, University of Monash, Melbourne, Australia.
• 1995 – 1996: Wissenschaftlicher Mitarbeiter, University of Montréal, Montreal, Canada.
• 1995: Ph.D. in Pétrologie/ Géochimie", University of Rennes, France
  Titre de la thèse: "L’altération des komatiites".
• 1992: "Diplome d’étude Approfondies", University of Rennes, France
  Titre du D.E.A.: "Petrological and geochemical study of the Paleozoic dyke swarm volcanism in the North Armorican domain".

Forschungsschwerpunkte

Igneous Geology:
- Detrital zircon study using laser ablation (MC) ICP-MS (U-Pb, Hf isotopes and trace elements)
- The use of radiogenic isotope, trace element abundances and computer modeling for the study of basic/ultrabasic magma genesis and upper mantle source rock compositions.

Hydrothermal Geochemistry:
- The quantification of chemical alteration effects in meta-volcanic rocks. Investigate the effects of hydrothermal alteration and metamorphism on the chemical (through the study of the trace element partitioning between the primary an secondary mineralogical phases) and isotopic ( Sm-Nd, Rb-Sr, ReOs, etc... ) compositions of mafic and ultramafic rocks. - - The isotopic and trace element inhomogeneity of minerals associated with hydrothermal gold deposits such as scheelite and carbonates.

Exploration geochemistry:
- The petrogenesis of komatiite-hosted nickel sulphide ore deposits and the development of lithogeochemical exploration methodologies for hydrothermal ore deposits of gold and base metal sulphides. Systematic documentation the variations in distribution, texture, mineralogy, and geochemical composition of komatiite in order to provide an improved physical volcanology framework in which to better apply lithogeochemistry to nickel sulphide exploration.

The development of new analytical techniques:
- Rhenium-Osmium and U-Th, as an isotopic tracer to identify the source as well, as a geochronological tool.
- Laser Ablation ICP-MS
for fingerprinting keys minerals associated with minerals deposits
- to constrain the trace element distribution in hydrothermal (scheelite from Western Australia), low temperature (opal from Queensland, Australia) and magmatic systems (sulfides from Western Australia and Canada, high purity quartz from Norway)
- MC-ICP-MS This new analytical technique provide the opportunity to study the stable isotopic geochemistry of Cu or Li. Recent studies have demonstrated the existence of significant isotopic variations amongst a wide range of material. Further analytical development is required to fully access the use of these new isotopic systems as geochemical tracers.
Rhenium-Osmium et U-Th, en tant que traceur isotopique et outil géochronologique.
Les isotopes du lithium et du cuivre en tant que traceur isotopique
L’ablation laser couplee a une ICP-MS pour le tracage géochimique.
La datation U-Pb sur zircon par LA-ICPMS
Les isotopes de l’Hf in-situ des zircons par LA-MC-ICPMS
Les isotopes du Soufre in-situ des sulfures par LA-MC-ICPMS

Archeology: (Arbeitsgruppe Archäometrie)
- The use of Pb and Cu isotopes for tracing the sources of metal artefacts
- The use of Sr isotopes from enamel for the archeological study of herd mobility

Publications

Forschungsprojekte

• U-Pb geochronology, Hf isotopic composition and trace element geochemistry of detrial zircons from the diamond bearing sediments of Namibia and South Africa

Analytical Experience

• VG PQII+ quadrupole ICP-MS and Finnigan MAT High Resolution ELEMENT1 (ref, 4, 6, 7, 8, 9, 10) and ELEMENT2 (ref,12,16)
• Laser ablation system Fisons IR et Merchantek (New Wave) UV (266, 213 nm, ref: 4, 6,7, 8, 9, 10, 12,16).
• TIMS: Finnigan MAT 262 at Rennes and Monash University (positive and negative ions, ref: 1, 2, 3, 9, 10).
• Use and maintenance of a Class 100 clean room
• Liquid chromatography (ref: 1,2,3, 9,10).
• Isotope diluton (ref: 2, 3, 9).
• isotopic systems of Li, Cu, Rb-Sr, Sm-Nd, Lu-Hf, Re-Os, Hg, U-Th et U-Pb
• (ref: 13, 14, 15, 17 et résumés).

Kontakt

Geozentrum der JWG-Universität - Zimmer 0.230

Institut für Geowissenschaften
Facheinheit Mineralogie - Petrologie und Geochemie
Altenhöferallee 1
D-60438 Frankfurt am Main

Büro-Telefon: +49 (0)69 798-40153

Labor-Telefon: +49 (0)69 798-40282

Fax: +49 (0)69 798-40121

Email:

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geändert am 24. Mai 2011  E-Mail: Webmasterkautz@kristall.uni-frankfurt.de

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