Μετεωρίτης ουρείλιτης, NWA 17031. Με την ύπαρξη σημαντικών ποσοτήτων γραφίτη. Δεν υπάρχει ελάχιστη τιμή. - 4.86 g - (1)
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Μετεωρίτης ουρείλιτης NWA 17031 από τη Δυτική Βόρεια Αφρική (NWA), βάρος 4,86 g, περιέχει σημαντικές ποσότητες γραφίτη, με πιστοποιητικό γνησιότητας.
Περίληψη με τη βοήθεια τεχνητής νοημοσύνης
Περιγραφή από τον πωλητή
Northwest Africa 17031 (NWA 17031)
Purchased: 2024
Classification: Ureilite
History: Reportedly found in Algeria in January 2024 and bought later in Mauritania by Mohamed Ali Loud from Al Bouhali Mahmoud-Hamadat
Petrography: (K. Metzler, IfP) Coarse-grained ultramafic rock, consisting of olivine and pyroxene grains with sizes up to several mm. Reduction features in olivine, i. e., reverse zoning and occurrence of tiny Ni-free metals at the margins, along cracks, and within the grains. Graphite occurs along silicate grain boundaries.
Geochemistry: Mineral compositions and geochemistry: Mean mineral chemistry: Olivine cores: Fa20.7±0.2 (Fa20.4-21.1); Fe/Mn (at.): 50.3; CaO: 0.4 wt% (n=12). Low-Ca pyroxene: Fs17.1±0.2 Wo9.1±0.2 (Fs16.9-17.6 Wo8.7-9.4); n=13. The mean concentration of Cr2O3 (wt%) in olivine and pyroxene is 0.6 and 1.3, respectively.
Classification: Ureilite, based on modal composition, mineral chemistry, occurrence of considerable amounts of graphite, and typical reduction features in olivine.
Shock stage: U-S2
Weathering grade: moderate
Classifier: K. Metzler, IfP.
This lot has no reserve price and comes with its certificate of authenticity.
Thanks for your interest.
Northwest Africa 17031 (NWA 17031)
Purchased: 2024
Classification: Ureilite
History: Reportedly found in Algeria in January 2024 and bought later in Mauritania by Mohamed Ali Loud from Al Bouhali Mahmoud-Hamadat
Petrography: (K. Metzler, IfP) Coarse-grained ultramafic rock, consisting of olivine and pyroxene grains with sizes up to several mm. Reduction features in olivine, i. e., reverse zoning and occurrence of tiny Ni-free metals at the margins, along cracks, and within the grains. Graphite occurs along silicate grain boundaries.
Geochemistry: Mineral compositions and geochemistry: Mean mineral chemistry: Olivine cores: Fa20.7±0.2 (Fa20.4-21.1); Fe/Mn (at.): 50.3; CaO: 0.4 wt% (n=12). Low-Ca pyroxene: Fs17.1±0.2 Wo9.1±0.2 (Fs16.9-17.6 Wo8.7-9.4); n=13. The mean concentration of Cr2O3 (wt%) in olivine and pyroxene is 0.6 and 1.3, respectively.
Classification: Ureilite, based on modal composition, mineral chemistry, occurrence of considerable amounts of graphite, and typical reduction features in olivine.
Shock stage: U-S2
Weathering grade: moderate
Classifier: K. Metzler, IfP.
This lot has no reserve price and comes with its certificate of authenticity.
Thanks for your interest.
Λεπτομέρειες
Αριθμός αντικειμένων
1
όνομα μετεωρίτη
Ureilite meteorite, NWA 17031.
τύπος μετεωρίτη
With occurrence of considerable amounts of graphite. No reserve price.
Βάρος
4.86 g
Προέλευση (Περιοχή / Πόλη)
NWA
Χώρα
NWA
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