Small Antarctic micrometeorites: A mineralogical and in situ oxygen isotope study

Autor:	Matthieu Gounelle, Franz Brandstätter, Kevin D. McKeegan, M. Maurette, Gero Kurat, C. Engrand
Rok vydání:	2005
Předmět:	In situ education.field_of_study Population Mineralogy Texture (geology) Isotopes of oxygen Isotopic composition Geophysics Interplanetary dust cloud Space and Planetary Science Homogeneous Micrometeorite education Geology
Zdroj:	Meteoritics & Planetary Science. 40:917-932
ISSN:	1945-5100 1086-9379
DOI:	10.1111/j.1945-5100.2005.tb00163.x
Popis:	We have investigated the texture, bulk chemistry, mineralogy, as well as the anhydrous minerals oxygen isotopic composition of 67 small Antarctic micrometeorites (AMMs) collected at Cap Prudhomme, Antarctica, and belonging to the currently poorly studied size fraction 25-50 μm. When compared to larger (50-400 μm) micrometeorites collected at the same site in Antarctica with the same techniques, no significant differences are found between the two populations. We therefore conclude that the population of Cap Prudhomme AMMs is homogeneous over the size range 25-400 μm. In contrast, small AMMs have different textures, mineralogy, and oxygen isotopic compositions than those of stratospheric interplanetary dust particles (IDPs). Because small AMMs (
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a4939510841c75b18873ac2ee96d3e03 https://doi.org/10.1111/j.1945-5100.2005.tb00163.x Zobrazit plný text záznamu Plný text