%0 Conference Paper %F Poster %T Fluorine and Chlorine in the transition Zone %+ Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC) %+ Laboratoire Magmas et Volcans (LMV) %+ Laboratoire d'Etudes des Eléments Légers (LEEL - UMR 3685) %A Bureau, Hélène %A Roberge, Mathilde %A Casanova, Nathalie, Bolfan %A Manthilake, Geeth %A Surble, Suzy %A Figowy, Sarah %A Fiquet, Guillaume %< avec comité de lecture %B 9th High Pressure Mineral Physics Seminar %C St Malo, France %8 2017-09-24 %D 2017 %Z Chemical Sciences/Material chemistryPoster communications %X We report concentrations of Fluorine (F) and Chlorine (Cl) in synthetic wadsleyite (Wd) and ringwoodite (Rw). Synthesis were performed under pressures (14–22GPa) and temperatures (1100–1400◦C) relevant to the transition zone (TZ: 410–670 km depth) using multi-anvil press experiments in MLV Clermont-Ferrand, France and in BGI Bayreuth, Germany. F, Cl and Hcontents were measured using Particle Induced Gamma-Ray Emission (PIGE), Particle Induced X-ray Emission (PIXE) and Elastic Recoil Detection Analysis (ERDA) respectively, using a nuclear microprobe at CEA Saclay. Results show that F (up to 850 ppm wt.) and Cl (up to 200 ppm wt.) are concentrated together with H2O in both Wd and Rw (Roberge et al., 2015; 2017).Cl content in Rw and Wd is significantly higher than in other nominally anhydrous minerals of the upper mantle (olivine, pyroxene, garnet), when we found that F is also concentrated in hydrous olivine (up to 1700 ppm wt., Crepisson et al, 2014). With these data we put constraints on the F and Cl budget of the deep Earth, we propose that the TZ may be a major repositoryfor major halogen elements in the mantle. We also show that both F and Cl abundances are underestimated for the bulk silicate Earth (BSE). We propose maximum abundances for the BSE of 59 ppm wt. F and 37 ppm wt. Cl, these abundances are higher than the values proposed by McDonougth and Sun in 1995, of 25 and 17 ppm wt. respectively. New results on F-bearingringwoodite will be presented at the meeting. %G English %2 https://cea.hal.science/cea-02341734/document %2 https://cea.hal.science/cea-02341734/file/Bureau_HPMPS2017.pdf %L cea-02341734 %U https://cea.hal.science/cea-02341734 %~ UNIV-ST-ETIENNE %~ IRD %~ CEA %~ INSU %~ MNHN %~ PRES_CLERMONT %~ CNRS %~ IMPMC %~ ALLINSP %~ LMV %~ PUBNIMBE %~ INC-CNRS %~ IRAMIS-NIMBE %~ CEA-UPSAY %~ UNIV-PARIS-SACLAY %~ CEA-UPSAY-SACLAY %~ OPGC %~ SORBONNE-UNIVERSITE %~ SU-INF-2018 %~ SU-SCIENCES %~ UDL %~ TEST-HALCNRS %~ SU-TI %~ GS-ENGINEERING %~ IRAMIS %~ GS-CHIMIE %~ GS-PHYSIQUE %~ INSTITUT-SCIENCES-LUMIERE %~ ALLIANCE-SU