Obiettivo Diamond-bearing rocks have traditionally been associated with kimberlites located above the deeper cratonic roots, as exemplified by occurrences in southern Africa. Recent research and exploration however, has challenged this model and has yielded diamonds within rocks associated with thin cratonic lithosphere and mobile belts. These host rocks are often not traditional kimberlites and have mineralogies inconsistent with the restricted depth interval of 120-200 km typically seen in cratonic diamond-bearing kimberlites. Studies of inclusions within diamonds suggest that in some cases, diamonds hosted within these exotic rocks were formed at extreme depths below 670 km.It is proposed through the study of archived material and new samples collected during field work to address questions of age, depth of origin, and emplacement of a variety of off-craton diamondiferous rocks. Detailed study will focus on samples from three off-craton settings. The petrology and geochemistry of an occurrence of Mesozoic diamondif erous kimberlite dykes and sills from Pyramidefjeld, S.W. Greenland will be addressed. The geochemistry of the kimberlites and associated xenoliths will be characterised and these rocks will be dated using mass spectrometry methods and U / Pb systematics. Study will be made of the geochemistry and petrography of Archaean diamondiferous lamprophyres from Wawa, Canada. Deep mantle diamonds archived from Juina, Brazil will be measured for He isotopic composition and sulphide inclusions will be dated by Re-Os m easurements.The proposal aims to satisfy the HRM objectives by providing the participant with training and new analytical skills, amongst others, in the field of geochronology and from a high international-standard institution. The participant will also re ceive exposure to international-class materials for study, thus contributing to his personal development and, ultimately to the advancement of the Union's diamond geological and exploration communities. Campo scientifico scienze naturaliscienze della terra e scienze ambientali connessegeochimicascienze naturaliscienze della terra e scienze ambientali connessegeologiageocronologiascienze naturaliscienze della terra e scienze ambientali connessegeologiavulcanologiascienze naturaliscienze chimichechimica analiticaspettrometria di massascienze naturaliscienze della terra e scienze ambientali connessegeologiapetrologiapetrografia Parole chiave Brazil Canada Convection Diamond Geochronology Greenland Helium Isotopes Inclusion Juina Kimberlite Lamprophyre Mantle Osmium Pyramidefjeld Rhenium Trace Elements Wawa Programma(i) FP6-MOBILITY - Human resources and Mobility in the specific programme for research, technological development and demonstration "Structuring the European Research Area" under the Sixth Framework Programme 2002-2006 Argomento(i) MOBILITY-2.1 - Marie Curie Intra-European Fellowships (EIF) Invito a presentare proposte FP6-2002-MOBILITY-5 Vedi altri progetti per questo bando Meccanismo di finanziamento EIF - Marie Curie actions-Intra-European Fellowships Coordinatore GEOLOGICAL SURVEY OF DENMARK AND GREENLAND Indirizzo Øster voldgade 10 Copenhagen-k Danimarca Mostra sulla mappa Collegamenti Sito web Opens in new window Contributo UE Nessun dato
