Rare, metal micrometeorites from the Indian Ocean

1M. Shyam Prasad, 1N. G. Rudraswami, 1Agnelo Alexandre De Araujo, 1V. D. Khedekar
Meteoritics & Planetary Science (in Press) Link to Article [https://doi.org/10.1111/maps.13206]
1Geological Oceanography Division, CSIR–National Institute of Oceanography, Dona Paula, Goa, India
Published by arrangement with John Wiley & Sons

Metal in various forms is common in almost all meteorites but considerably rare among micrometeorites. We report here the discovery of two metal micrometeorites, i.e., (1) an awaruite grain similar to those found in the metal nodules of CV chondrites and (2) a metal micrometeorite of kamacite composition enclosing inclusions of chromite and merrillite. This micrometeorite appears to be a fragment of H5/L5 chondrite. These metal micrometeorites add to the inventory of solar system materials that are accreted by the Earth in microscopic form. They also strengthen the argument that a large proportion of material accreted by the Earth that survives atmospheric entry is from asteroidal sources.


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