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MISSING: 9.04 kilogram Sikhote-Alin shrapnel individual   More Info

An MPOD Classic
from 28 February 2018

NWA 869   contributed by Bernd Pauli   MetBul Link

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View all entries for   Meteorite (20)   Contributor (91)

Copyright (c) Bernd Pauli.
111.1 gram end cut.   L3-6

TKW 2 tons. Fall not observed. Found in 2000.

Bernd writes:
111.1 gr cut endpiece with fusion crust purchased from Dean Bessey who handled most of the early NWA 869 material. There are chondrule-rich and chondrule-poor areas in this coarse-grained, chondritic regolith breccia and the finely disseminated metal flakes are much smaller than in NWA 904, an 869 look-alike. While the unequilibrated lithologies stem from a surficial layer of the parent body, the equilibrated chondritic clasts come from greater depths.

The preatmospheric radius of the NWA 869 meteoroid must have been 2.0-2.5 m, a radius that corresponds to a mass of 120-230 metric tons. The recovered mass of about 7 metric tons shows that more than 90% of the initial mass was lost by ablation during atmospheric passage.

As a matter of interest, the Antarctic L-chondrite MAC 87302 closely resembles NWA 869.

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