EXTRATERESTRICKÉ BAZALTY NWA 5235 A HaH 286 A JEJICH POROVNÁNÍ S MORAVSKÝM METEORITEM STONAŘOV

Magdalena Šimčíková

Abstrakt

Moravian meteorite Stannern is the only one meteorite fallen into our region which represents achondrite group of meteorites. This meteorite is very unique due to its composition and it is one of the most examined meteorite - eucrite in the world. Samples of eucrites NWA 5235 and HaH 286 found in african deserts were studied and compared with Stannern trend eucrites. NWA 5235 is relatively fresh, HaH 286 is weakly weathered, with fractures fi lled by calcite. Electron microprobe analyses showed that these meteorites represent typical non cumulate basalts which fall within main trend eucrites. They mainly consist of pyroxenes (low-Ca pyroxenes and augites) and plagioclase (bytownite – anorthite). Accessories include ilmenite, chromite, rarely silica phase, troilite and metal Fe. The bulk composition of these samples has been determined for major elements. Research of these meteorites helps to understand the petrological context of their parent bodies. It also leads to understanding of magmatic processes of asteroid 4 Vesta which is believeded to be the parent body of the eucrites.

Bibliografická citace

Šimčíková, M. (2012). EXTRATERESTRICKÉ BAZALTY NWA 5235 A HaH 286 A JEJICH POROVNÁNÍ S MORAVSKÝM METEORITEM STONAŘOV. Geologické výzkumy na Moravě a ve Slezsku, 19(1-2). doi:http://dx.doi.org/10.5817/GVMS2012-1-2-199

Klíčová slova

Stonařov, asteroide Vesta, Stannern trend eucrites, pyroxenes

Plný Text:

Reference

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https://doi.org/10.5817/GVMS2012-1-2-199