March 13th 2019 16th Russbach School on Nuclear Astrophysics Azzurra Zucchini* *Dipartimento di Fisica e Geologia dell’Università degli Studi di Perugia *INFN sezione Perugia History of the Mineo meteorite: from the origin to the lab. First results about the Rock Star project Sezione Perugia Outline The Rockstars project Meteorite classification The Mineo meteorite characterization 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 The ROCK-STARS project R. Canteri, G. Pepponi Sezione Perugia F. Terrasi Dr. Azzurra Zucchini Dr. Maurizio Petrelli Dr. Sara Palmerini Prof. Francesco Frondini Prof. Maurizio Busso Dr. Oscar Trippella Prof. Paola Comodi Prof. Diego Perugini Dr. Lisa Ricci F. Marzaioli, L. Stellato, M. Rubino, B. di Rienzo, Buonpane, L. Gialanella, A. D’Onofrio 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 The ROCK-STARS project Planetesimal differentiation Meteorites 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 Meteorites: their origin Meteorites rain Asteroid #1 Asteroid #2 Planetesimal impact http://www.astronomy.com 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 Meteorites: their origin Planetesimals CRUST UNDIFFERENTIATED DIFFERENTIATED Homogenous distribution Big planetesimals (~50km diameter) of elements and mineral undergone a complete differentiation phases process in shels commonly called nucleus, mantle and crust. 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 Unifferentiated meteorites ✓ They are cosmic sediments made by particles CAIs http://www.astronomy.com directly coming from the solar nebula. They give information on the Solar System original Matrix composition. Chondrules ✓ In their fine grained matrix Ca-Al rich inclusions (CAIs), chondrules and presolar grains are CHONDRITES hosted. ~ 95 vol% < 1-5 vol% Davis & Richter (2005) 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 Unifferentiated meteorites Chondrules CAIs within chondrules Presolar grains http://www.astronomy.com SiC Spinel SiC TiC Graphite Graphite inclusion in graphite Nittler (2003) TiC inclusion in SiC Graphite Lodders and Amari (2005) Zinner 2014 Scott and Krot 2005, Chondrites and their components. 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 Differentiated meteorites http://www.astronomy.com ACHONDRITES http://www.meteorites.com.au http://www.meteorites.com.au Achondrite s.l. Stony-iron meteorites Iron meteorites Achondrite Stony meteorites lacking of chondrules. Despite the name achondrites is nowadays attributed to the whole group of differentiated meteorites (differentiated achondrites), it was originally given to meteorites coming from the crust of the differentiated parent with basic composition (SiO2 = 45-52 weight%) and similar to terrestrial basalts. Primitive achondrite Differentiated achondrite Compositions close to the composition Chemical composition highly of chondrites, moderately fractionated fractionated from the ranges of from the range of nebular materials. chondritic materials. 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 Differentiated meteorites http://www.astronomy.com ACHONDRITES http://www.meteorites.com.au http://www.meteorites.com.au Achondrite s.l. Stony-iron meteorites Iron meteorites Stony-iron They are mixtures of achondritic textured stony portions and Fe,Ni metal likely coming from the mantle-nucleus interface. ✓ PALLASITES: stony-iron meteorites essentially composed by olivine [(Mg,Fe)2SiO4] and (Fe,Ni) metal. ✓ MESOSIDERITES: mixtures of metal and basaltic material. New parent body consisting Iron meteorites Meteorites essentially composed of (Fe,Ni) metal of olivine fragments (from the likely coming from the nucleus of the mantle) and molten Fe-Ni differentiated parent body. (from the residual Fe-Ni melt) 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 Meteorites @ UniPG Prof. Bartolomeo BALDANZA (Milazzo – ME, 05-07-1917) In 1968 found the Italian Center for Meteorite Study at Mineralogy Institut in Perugia. meteorites impattites tectites 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 Meteorites @ UniPG Prof. Bartolomeo BALDANZA (Milazzo – ME, 05-07-1917) In 1968 found the Italian Center for Meteorite Study at Mineralogy Institut in Perugia. meteorites impattites tectites Meteorite MINEO 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 MINEO Pallasite @ UniPG May the 3rd, 1826 Only @ UniPG one of the 110 meteorites classified as pallasites one of the only four witnessed pallasite falls in the world the only sample still available worldwide (Baldanza 1965; Grady 2000) 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 MINEO Pallasite @ UniPG Forsterite - Mg SiO Olivine 2 4 Fayalite - Fe2SiO4 Mineo pallasite @ UNIPG Wikipedia.org 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 MINEO Pallasite @ UniPG Kamacite - Ni 4-7.5 wt% (Fe,Ni) metal Taenite - Ni 27-65 wt% Mineo pallasite @ UNIPG 10 mm He et al. (2006) 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 MINEO Pallasite @ UniPG Chemical composition Image analysis http://www.directindustry.com EPMA LA-ICP-MS Isotopic composition MICROSCOPY Mineralogical composition www.thermofisher.com MC-ICP-MS X-ray diffraction TOF-SIMS 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 MINEO Pallasite @ UniPG Bulk FE-SEM Mineo pallasite @ UNIPG 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 MINEO Pallasite @ UniPG Bulk FE-SEM Mineo pallasite @ UNIPG EPMA 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 MINEO Pallasite @ UniPG (Fe,Ni) metal Kamacite - Ni 4-7.5 wt% (Fe,Ni) metal Taenite - Ni 27-65 wt% Mineo pallasite @ UNIPG LA-ICP-MS Mineo FE-SEM 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 MINEO Pallasite @ UniPG Olivines Forsterite - Mg SiO Olivines 2 4 Fayalite - Fe SiO Mineo pallasite @ UNIPG 2 4 Raman EPMA 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 MINEO Pallasite @ UniPG Olivines Forsterite - Mg SiO Olivines 2 4 Fayalite - Fe SiO Mineo pallasite @ UNIPG 2 4 Raman EPMA 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 MINEO Pallasite @ UniPG Iron oxides 1. FE-SEM 2. XRPD pallasiteMineo pallasite Mineo @ UNIPG 4. TEM 3. Raman 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 MINEO Pallasite @ UniPG Iron oxides 1. FE-SEM 2. XRPD pallasiteMineo pallasite Mineo @ UNIPG 4. TEM 3. Raman 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 Isotopes analysis Isotopes in MINEO pallasite TOF-SIMS Mineo pallasite @ UNIPG I mass Poitrasson et al.(2005) Modified from Wasson and Choi (2003) 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 Isotopes analysis Oxygen isotopes in MINEO pallasite 16 TOF-SIMS O 16O Mineo pallasite @ UNIPG 17O 17O 18O 18O 1 16 H2 O 16O1H 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 Isotopes analysis Oxygen isotopes in MINEO pallasite TOF-SIMS Mineo pallasite @ UNIPG Brenham pallasite 3 points 3-2 measurements per point 18 16 O/ O in the sample δ18O = 3.0‰ ± 0.2 18 VC = 6.1 % δ O 푅 훿 = − 1 ∗ 1000 푅푆 Mineo pallasite 4 points 2 measurements per point 18O/16O in the standard (SMOW) δ18O = 2.3‰ ± 0.3 VC = 12.9 % 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the origin to the lab. First results about the Rock Star project March 13th 2019 Isotopes analysis Oxygen isotopes in MINEO pallasite TOF-SIMS Mineo pallasite @ UNIPG Brenham pallasite 3 points 3-2 measurements per point 18 16 Mineo (present study) O/ O nel campione 18 δBrenhamO = (present 3.0 ± study)0.2 18 δ O 푅 훿 = − 1 ∗ 1000 푅푆 Mineo pallasite 4 points 2 measurements per point 18O/16O nello standard (SMOW) δ18O = 2.3 ± 0.3 CV = 12.9 % 16th Russbach School on Nuclear Astrophysics History of a meteorite: from the originModified to the from lab.