TY - JOUR
T1 - The history of the Tissint meteorite, from its crystallization on Mars to its exposure in space
T2 - New geochemical, isotopic, and cosmogenic nuclide data
AU - Schulz, Toni
AU - Povinec, Pavel P.
AU - Ferrière, Ludovic
AU - Jull, A. J.Timothy
AU - Kováčik, Andrej
AU - Sýkora, Ivan
AU - Tusch, Jonas
AU - Münker, Carsten
AU - Topa, Dan
AU - Koeberl, Christian
N1 - Funding Information:
This paper is dedicated to the memory of Oskar Ermann (1924?2011) without whom the NHMV would never have been able to acquire the specimens of Tissint that were used for this study. The Bratislava group acknowledges a support provided by the Slovak Grant Agencies VEGA (project nos. 1/0783/14 and 1/0891/17), the Slovak Research and Development Agency (project no. APVV-15-0576), and by the EU Research and Development Operational Program funded by the ERDF (project nos. 26240120012, 26240120026, and 26240220004). AJTJ acknowledges support by the European Union and the State of Hungary, co-financed by the European Regional Development Fund in the project of GINOP-2.3.2-15-2016-00009 ?ICER?. We thank Wencke Wegner and Monika Horschinegg for help in the clean laboratory and Sr-Nd analyses. Franz Brandst?tter is acknowledged for interesting discussions on the mineralogy of Tissint. Toni Schulz's research was funded by the German Research Foundation (DFG, SCHU 3061/1-1). This is contribution 59 of the DFG-funded ICP-MS facilities at the Steinmann-Institute, University of Bonn. We thank two anonymous reviewers for their constructive comments and K. Righter for editorial handling. Dr. Kevin Righter
Funding Information:
This paper is dedicated to the memory of Oskar Ermann (1924–2011) without whom the NHMV would never have been able to acquire the specimens of Tissint that were used for this study. The Bratislava group acknowledges a support provided by the Slovak Grant Agencies VEGA (project nos. 1/0783/14 and 1/0891/17), the Slovak Research and Development Agency (project no. APVV‐15‐0576), and by the EU Research and Development Operational Program funded by the ERDF (project nos. 26240120012, 26240120026, and 26240220004). AJTJ acknowledges support by the European Union and the State of Hungary, co‐financed by the European Regional Development Fund in the project of GINOP‐2.3.2‐15‐2016‐00009 “ICER”. We thank Wencke Wegner and Monika Horschinegg for help in the clean laboratory and Sr‐Nd analyses. Franz Brandstätter is acknowledged for interesting discussions on the mineralogy of Tissint. Toni Schulz's research was funded by the German Research Foundation (DFG, SCHU 3061/1‐1). This is contribution 59 of the DFG‐funded ICP‐MS facilities at the Steinmann‐Institute, University of Bonn. We thank two anonymous reviewers for their constructive comments and K. Righter for editorial handling.
Publisher Copyright:
© 2020 The Authors. Meteoritics & Planetary Science published by Wiley Periodicals, Inc. on behalf of The Meteoritical Society (MET)
PY - 2020/2/1
Y1 - 2020/2/1
N2 - The Tissint meteorite fell on July 18, 2011 in Morocco and was quickly recovered, allowing the investigation of a new unaltered sample from Mars. We report new high-field strength and highly siderophile element (HSE) data, Sr-Nd-Hf-W-Os isotope analyses, and data for cosmogenic nuclides in order to examine the history of the Tissint meteorite, from its source composition and crystallization to its irradiation history. We present high-field strength element compositions that are typical for depleted Martian basalts (0.174 ppm Nb, 17.4 ppm Zr, 0.7352 ppm Hf, and 0.0444 ppm W), and, together with an extended literature data set for shergottites, help to reevaluate Mars’ tectonic evolution in comparison to that of the early Earth. HSE contents (0.07 ppb Re, 0.92 ppb Os, 2.55 ppb Ir, and 7.87 ppb Pt) vary significantly in comparison to literature data, reflecting significant sample inhomogeneity. Isotope data for Os and W (187Os/188Os = 0.1289 ± 15 and an ε182W = +1.41 ± 0.46) are both indistinguishable from literature data. An internal Lu-Hf isochron for Tissint defines a crystallization age of 665 ± 74 Ma. Considering only Sm-Nd and Lu-Hf chronometry, we obtain, using our and literature values, a best estimate for the age of Tissint of 582 ± 18 Ma (MSWD = 3.2). Cosmogenic radionuclides analyzed in the Tissint meteorite are typical for a recent fall. Tissint's pre-atmospheric radius was estimated to be 22 ± 2 cm, resulting in an estimated total mass of 130 ± 40 kg. Our cosmic-ray exposure age of 0.9 ± 0.2 Ma is consistent with earlier estimations and exposure ages for other shergottites in general.
AB - The Tissint meteorite fell on July 18, 2011 in Morocco and was quickly recovered, allowing the investigation of a new unaltered sample from Mars. We report new high-field strength and highly siderophile element (HSE) data, Sr-Nd-Hf-W-Os isotope analyses, and data for cosmogenic nuclides in order to examine the history of the Tissint meteorite, from its source composition and crystallization to its irradiation history. We present high-field strength element compositions that are typical for depleted Martian basalts (0.174 ppm Nb, 17.4 ppm Zr, 0.7352 ppm Hf, and 0.0444 ppm W), and, together with an extended literature data set for shergottites, help to reevaluate Mars’ tectonic evolution in comparison to that of the early Earth. HSE contents (0.07 ppb Re, 0.92 ppb Os, 2.55 ppb Ir, and 7.87 ppb Pt) vary significantly in comparison to literature data, reflecting significant sample inhomogeneity. Isotope data for Os and W (187Os/188Os = 0.1289 ± 15 and an ε182W = +1.41 ± 0.46) are both indistinguishable from literature data. An internal Lu-Hf isochron for Tissint defines a crystallization age of 665 ± 74 Ma. Considering only Sm-Nd and Lu-Hf chronometry, we obtain, using our and literature values, a best estimate for the age of Tissint of 582 ± 18 Ma (MSWD = 3.2). Cosmogenic radionuclides analyzed in the Tissint meteorite are typical for a recent fall. Tissint's pre-atmospheric radius was estimated to be 22 ± 2 cm, resulting in an estimated total mass of 130 ± 40 kg. Our cosmic-ray exposure age of 0.9 ± 0.2 Ma is consistent with earlier estimations and exposure ages for other shergottites in general.
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U2 - 10.1111/maps.13435
DO - 10.1111/maps.13435
M3 - Article
AN - SCOPUS:85078718710
VL - 55
SP - 294
EP - 311
JO - Meteoritics and Planetary Science
JF - Meteoritics and Planetary Science
SN - 1086-9379
IS - 2
ER -