46835 2018 eng 6154 6154 53 conferenceobject Wiley 1 -- -- -- Bulk enstatite chondrites (EC) and their achondritic counterpart, the aubrites, have the lightest measured Si isotope composition of all rocks in the solar system. Some authors proposed that the enrichment of 28Si in EC metal by equilibrium or kinetic isotope fractionation processes in the solar nebula may have led to the negative δ30/28Si of bulk EC. Because EC are also depleted in refractory elements, loss of a heavy Si component with refractory elements might be an alternative explanation. To further constrain their genesis, we analysed for the first time in situ Si-isotope ratios simultaneously with major- and trace element abundances in silicate and metal phases of Sahara 97072 (EH3) and Indarch (EH4). Meteoritics & planetary science 1945-5100 81st Annual Meeting of The Meteoritical Society 2018 Moscow, Russia 22.07.2018 27.07.2018 03.12.2018 Y. Kadlag Michael Tatzel D. A. Frick H. Becker eng uncontrolled Si isotopes Analytische Chemie Verlagsliteratur Datei im Netzwerk der BAM verfügbar ("Closed Access")