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dc.contributor.authorFernandes, D.
dc.contributor.authorRudraswami, N.G.
dc.contributor.authorSingh, V.P.
dc.date.accessioned2025-09-30
dc.date.accessioned2025-09-30T04:44:06Z
dc.date.available2025-08-05
dc.date.available2025-09-30T04:44:06Z
dc.date.issued2025
dc.identifier.citationAdvances in Space Research,vol.76(5);2025; pp: 3171-3199
dc.identifier.issn1879-1948
dc.identifier.otherhttps://www.sciencedirect.com/science/article/pii/S0273117725006726
dc.identifier.urihttps://doi.org/10.1016/j.asr.2025.06.060.
dc.identifier.urihttp://drs.nio.res.in/drs/handle/2264/9509
dc.descriptionIF2024= 2.8
dc.description.abstractWe analysed ten unmelted fine-grained�micrometeorites�(FgMMs) and ten coarse-grained micrometeorites (CgMMs), along with eight fine-grained scoriaceous micrometeorites (Fg/ScMMs) and sixteen scoriaceous micrometeorites (ScMMs). Particles were recovered using the density separation technique from sediments obtained by melting Antarctic ice. Based on petrological features, unmelted FgMMs strongly resemble the hydrous matrices of carbonaceous CI, CM, CV and CO�chondrites, while CgMMs represent�chondrule�fragments from both carbonaceous and�ordinary chondrites. Texturally, the matrices of FgMMs are characterised into C1, C2, and C3 and their elemental composition, along with ScMMs, are similar to individual carbonaceous chondritic groups and hydrated�interplanetary dust�particles (IDPs) as well as asteroid Ryugu and Bennu. However, matrices of both FgMMs and ScMMs show depletion in Ni and S. The chemical composition of the mineral grains in FgMMs, CgMMs, and ScMMs does not differ from those reported in previous collections, which may be from similar parent bodies and have a strong affinity for chondrules from carbonaceous and ordinary chondrites. This study suggests that the porous matrix nature of FgMMs material precursors generally aligns with the carbonaceous asteroids��matrix material. In contrast, the coarse-grained particles may represent asteroids with chondrule-bearing carbonaceous and ordinary chondrites.
dc.languageen
dc.publisherElsevier
dc.relation.isreferencedbySCI
dc.rightsOnly the author version of the copright reserved papers uploaded. Contact drs@nio.org for any complaints regarding copyright violations
dc.titlePetrography of scoriaceous and unmelted micrometeorites from the Maitri Station, Antarctica collection
dc.typeJournal Article
dc.affiliation.authorCSIR-National Institute of Oceanography, Dona Paula, Goa, India


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