Publication details

Elemental composition, mineralogy and orbital parameters of the Porangaba meteorite


FERUS Martin PETERA Lukáš KOUKAL Jakub LENŽA Libor DRTINOVÁ Barbora HALODA Jakub MATÝSEK Dalibor PASTOREK Adam LAITL Vojtěch POLTRONIERI Renato Cassio DOMINGUES Marcelo Wagner GONCALVES Gabriel SATO Rodrigodel del Olmo KNÍŽEK Antonín KUBELÍK Petr KŘIVKOVÁ Anna SRBA Jiří DI PIETRO Carlos Augusto BOUŠA Milan VACULOVIČ Tomáš CIVIŠ Svatopluch

Year of publication 2020
Type Article in Periodical
Magazine / Source Icarus
MU Faculty or unit

Faculty of Science

Keywords LIBS; EDS; Porangaba
Description The main objective of this study is to provide data on the bulk elemental composition, mineralogy and the possible origin of the Porangaba meteorite, whose fall was observed at 17:35 UT on 9 January 2015 on several sites of the state of Sao Paulo in Brazil. The surface of the meteorite was mapped by Scanning Electron Microscopy (SEM) and optical microscopy. The mineralogy and the bulk elemental composition of the meteorite were studied using Energy-Dispersive and Wavelength-Dispersive X-ray Spectroscopy (EDS/WDS) together with Electron Back Scatter Diffraction (EBSD). The bulk elemental composition was also independently analysed by Atomic Absorption Spectrometry (AAS), Inductively Coupled Plasma Mass Spectrometry (ICP-MS), Laser Ablation ICP MS (LA ICP-MS) and Calibration-Free Laser-Induced Breakdown Spectroscopy (CF-LIBS). Based on the available visual camera records of the Porangaba meteorite fall, its orbit was tentatively calculated, and possible candidates for the source bodies in the Solar system were proposed. We also present a laboratory simulation of a Porangaba-like (L4 Ordinary Chondrite) meteor emission spectra. These can be used as benchmark spectra for the identification of meteor rock types through their comparison with meteor spectra recorded by high-speed videocameras equipped with simple grating spectrographs.

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