Nowy niezbrekcjonowany meteoryt enstatytowy z Algierii

• Authors: Łukasz Karwowski , Mateusz Szyszka

Title variants

EN

A new unbrecciated enstatite meteorite from Algeria

• Languages of publication: PL

Abstracts

EN

In this paper, a new mineralogical and chemical data on a new brecciated enstatite are presented. Fe-low enstite is the main pyroxene. Locally small grains of diopside were noted. The rest of silicates are represented by oligoclase and cristobalite. Siliceous glass was also found. The meteorite contains up to11.5 vol.% of Ni-kamacite (up to 6.8 wt.% of Ni and up to 2.9 wt.% of Si). Niningeryt and Cr-rich troilite are the main sulphides. Small amount of graphite forms a bundle-like agregates of fine plate crystals. The classification is still in progres. The new meteorite from Algeria can be an example of unbrecciated enstatite or ungrouped achondrites.

Keywords

EN

Si- bearing kamacite; enstatite; enstatite achondrite; keilite; niningerite; oligoclase; siliceous glass; troilite

Discipline

• GEOLOGY: GEOLOGY

• Publisher: Polskie Towarzystwo Meteorytowe
• Journal: Acta Societatis Metheoriticae Polonorum
• Year: 2019
• Volume: 10
• Pages: 51-61

Contributors

author

Łukasz Karwowski

• Uniwersytet Śląski w Katowicach; Wydział Nauk o Ziemi; 41-200 Sosnowiec; ul. Będzińska 60

author

Mateusz Szyszka

• Uniwersytet Adama Mickiewicza, Wydział Nauk Geograficznych i Geologicznych, 61-680 Poznań, ul. Bogumiła Krygowskiego 10

References

• Britvin S.N., Bogdanova A.N., Boldyreva M.M., Aksenova G.Y., 2008, Rudashevskyite, the Fe-dominant analogue of sphalerite, a new mineral: Description and crystal structure, American Mineralogist, 93, s. 902–909.
• Keil K., 2010, Enstatite achondrite meteorites (aubrites) and the histories of their asteroidal parent bodies, Chemie der Erde – Geochemistry, 70(4), s. 295-317.
• Shimizu M., Yoshida H., Mandarino J.A., 2002, The new mineral species keilite, (Fe,Mg)S, the iron-dominant analogue of niningerite, The Canadian Mineralogist, 40, s. 1687–1692.
• Pilski A.S., Przylibski T.A., Łuszczek K. 2011, Promitive achondrites enstatites, Meteorites, 0(0), 2011, s. 9–21.
• Waters T.R., Prinz M. 1979, Aubrites: their origin and relationship to enstatite chondrites, Lunar and Planetary Science Conference Proceedings. Volume 1. (A80-23557 08-91).

• Document Type: article