Martian Meteorite NWA 13369 - Poikilitic Shergottite (Peridotitic)
Item History & Price
| Reference Number: Avaluer:55615579 |
NWA 13369
Planetary AchondriteMartianPoikilitic Shergottite (Peridotitic)Specimen is a 0.93g sliceCOMBINED SHIPPING : 5$ per package
This meteorite was classified by Anthony love at the Appalachian State University, as a *poikilitic shergottite, describing it structurally.
*Poikilitic texture refers to igneous rocks where large component crystals contain smaller crystals of other minerals within t...hem. In poikilitic rocks, the contained smaller crystals are termed 'chadacrysts' (here the olivine, the shock darkened crystals) and the larger phenocrysts are termed 'oikocrysts' (here the pyroxene, apple green colored).
The paired meteorites NWA 13250 and NWA 13367 have been described accordingly by their classifier (Carl Agee, University of New Mexico) as structurally poikilitic indeed, but he went to submit them to the Nomenclature Comittee of the Meteoritical Societyn as describing the proposed nature of the rock as well : *peridotitic
*Peridotite is a dense, coarse-grained mostly mantelic igneous rock consisting predominatly of the minerals olivine and pyroxene. Peridotite is ultramafic, as the rock contains less than 45% silica. It is high in magnesium (Mg2+), reflecting the high proportions of magnesium-rich olivine, with appreciable iron. Peridotite is derived from the mantle of a planetary parent body, either as solid blocks and fragments, or as crystals accumulated from magmas that formed in the mantle.
Northwest Africa 13369Basic informationName: Northwest Africa 13369
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13369
Observed fall: No
Year found: 2020
Country: Algeria
Mass: 24.7 g
Classification
history:Recommended: Martian (shergottite) Comments:Approved 2 Aug 2020Writeup
