SPACE WEATHERING PROCESSES ON AIRLESS BODIES: FE ISOTOPE FRACTIONATION IN THE LUNAR REGOLITH

Show simple item record

dc.contributor.author Wiesli R.A.
dc.contributor.author Beard B.L.
dc.contributor.author Taylor L.A.
dc.contributor.author Johnson C.M.
dc.date.accessioned 2022-01-01T05:41:02Z
dc.date.available 2022-01-01T05:41:02Z
dc.date.issued 2003
dc.identifier https://www.elibrary.ru/item.asp?id=5189595
dc.identifier.citation Earth and Planetary Science Letters, 2003, 216, 4, 457-465
dc.identifier.issn 0012-821X
dc.identifier.uri https://repository.geologyscience.ru/handle/123456789/33997
dc.description.abstract Nanophase Fe metal grains (np-Fe°) are a product of space weathering, formed by processes related to meteorite impacts, and solar-wind sputtering on airless planetary bodies, such as the Moon. Iron isotopes of lunar soils are fractionated during these processes, and the np-Fe° in the finest (<10 μm), mature, size fractions of the soil become enriched in heavier isotopes by ~0.3‰ 56Fe/54Fe in comparison to the bulk rocks (0.03+/-0.05‰), from which the soil was formed. A positive correlation of δ56Fe values with the soil maturity index, IS/FeO, suggests that the high δ56Fe values reflect production of nanophase Fe metal that is produced by space weathering that occurs on airless planetary bodies. Furthermore, the enrichment of δ56Fe in the smallest size fraction of lunar soils supports a model for creation of np-Fe° through vapor deposition induced by micrometeorites, as well as that by solar-wind sputtering.
dc.subject FE ISOTOPES
dc.subject ISOTOPE FRACTIONATION
dc.subject LUNAR SOILS
dc.subject SPACE WEATHERING
dc.title SPACE WEATHERING PROCESSES ON AIRLESS BODIES: FE ISOTOPE FRACTIONATION IN THE LUNAR REGOLITH
dc.type Статья


Files in this item

Icon
Name: Wies_03.pdf
Size: 443.7Kb
Format: PDF
View/Open

This item appears in the following Collection(s)

  • ELibrary
    Метаданные публикаций с сайта https://www.elibrary.ru

Show simple item record