|Basic information||Name: Vicência|
This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: Yes
Year fell: 2013
Mass: 1540 g
This is 1 of 20 approved meteorites classified as LL3.2. [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
|Comments:||Approved 30 Aug 2014|
Writeup from MB 103:
Vicência 7°42.5’S, 35°25.66’W
Fell: 21 Sept 2013
Classification: Ordinary chondrite (LL3.2)
History: Fell, September 21, 2013, ~15:00 hours local time (18:00 UTC), village Borracha near Vicência, Pernambuco, Brazil. Landed <1 m from Mr. Adeildo Silva. Mr. Adeildo Silva claims that when he picked up the meteorite immediately after the fall, one side was warm, whereas the other was cold. Purchased by Maria E. Zucolotto and Andre Moutinho on September 30, 2013.
Physical characteristics: Single stone of 1.547 kg and ~13.7 × 12 × 8.5 cm. Pronounced chondritic texture, with abundant chondrules up to ~7 mm in diameter. Bulk density 3.13 g/cm3; grain density 3.28 g/cm3, porosity of 4.75%.
Petrography: Unshocked (S1), well-developed chondritic texture and mineralogy and mineral compositions of a highly unequilibrated ordinary chondrite. Major minerals olivine (Fa0.4-58.9), low-Ca pyroxene (Fs0.4-29.8). Mean Cr2O3 ferroan olivine 0.14±0.09 wt.%, n=115.
Geochemistry: R. Greenwood and I. Franchi, OU. Bulk oxygen isotopic composition is δ17O = 3.768 ± 0.042‰, δ18O = 5.359 ± 0.042‰, Δ17O = 0.981 ±0.020 ‰.
Classification: LL group based on chondrule mean apparent diameter (0.9 mm), bulk oxygen isotopic composition, content of metallic Fe,Ni (1.8 vol%), Co content of kamacite (1.73 wt%), ratios of metallic FeO/total iron (0.105) vs. total Fe/Mg (1.164), and of Ni/Mg (0.057) vs. total Fe/Mg. Petrologic type 3.2 classification is based on chondritic texture, plot of the standard deviation (0.09) vs the mean Cr2O3 content (0.14 wt. %) of ferroan olivine, trapped 132Xe of ~32×10-10cm3STP/g consistent with petrologic type 3.2.
OU: Planetary and Space Sciences
Department of Physical Sciences
The Open University
United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
MNRJ: Museu Nacional, Quinta da Boa Vista, Rio de Janeiro, CEP 20940-040, Brazil (institutional address; updated 26 Dec 2011)
UH: Hawai'i Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawai'i, 2525 Correa Road, Honolulu, HI 96822, United States (institutional address; updated 25 Oct 2011)
NMB: Natural History Museum Bern Bernastrasse 15 CH-3005 Bern Switzerland, Switzerland; Website (institutional address; updated 2 Mar 2012)
|References:||Published in Meteoritical Bulletin, no. 103, in preparation (2014)|
This is 1 of 2 approved meteorites from Pernambuco, Brazil (plus 1 unapproved name)
This is 1 of 71 approved meteorites from Brazil (plus 6 unapproved names) (plus 6 impact craters)
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