The Presence and Absence of Different Isotopically Anomalous Phases in the Primitive Interplanetary Dust Particle Tiberius

The Presence and Absence of Different Isotopically Anomalous Phases in the Primitive Interplanetary

Introduction: Interplanetary dust particles (IDPs) sample material preserved from the earliest formation of the solar system. Recent work shows the existence of a subgroup of IDPs characterized as isotopically primitive [1, 2]. These IDPs have anomalous bulk N isotopic compositions and contain abundant circumstellar and interstellar phases. We have been examining one such IDP, nicknamed Tiberiu...

Tof-sims Analysis of Isotopically Anomalous Phases in Interplanetary Dust and Renazzo

Circumstellar aluminum oxide and silicon carbide in interplanetary dust particles

A systematic NanoSIMS isotope imaging study of sub-micrometer phases in interplanetary dust particles (IDPs) has led to the discovery of two presolar grain types that previously were observed only in primitive meteorites. A 350 · 600 nm Al2O3 grain has a large O enrichment and a slight O depletion, as well as a Mg excess due to the decay of extinct Al. Because of its relatively large size and p...

Identification of isotopically primitive interplanetary dust particles: A NanoSIMS isotopic imaging study

We have carried out a comprehensive survey of the isotopic compositions (H, B, C, N, O, and S) of a suite of interplanetary dust particles (IDPs), including both cluster and individual particles. Isotopic imaging with the NanoSIMS shows the presence of numerous discrete hotspots that are strongly enriched in N, up to 1300&. A number of the IDPs also contain larger regions with more modest enric...

How different source regions across the Middle East change aerosol and dust particle characteristics

A major question is whether different source regions across the Middle East account for changes in aerosol and dust particle characteristics, which impact Western Iran. Therefore, over a period of sampling from April 2017 to April 2018, dust particles were collected in Western Iran from different cities including Urmia, Sanandaj, Sare-Pole-Zahab, Dehloran and Abadan. The research aim is to comp...