header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 18 Sep 2021
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Include past classifications in search
Limit to approved meteorite names
Search text:  
Northwest Africa 12727
Basic information Name: Northwest Africa 12727
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12727
Observed fall: No
Year found: 2018
Country: Morocco
Mass:help 4.53 kg
Classification
  history:
Recommended:  LL3    [explanation]

This is 1 of 371 approved meteorites classified as LL3.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 12 Dec 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 12727 (NWA 12727)

Morocco

Purchased: 2018

Classification: Ordinary chondrite (LL3)

History: Collected by nomads in Western Sahara and purchased by Giorgio Tomelleri at the Erfoud market in 2018 from a Moroccan dealer.

Physical characteristics: A single piece weighing 4560 g with a black fusion crust. The cut surface appears weakly weathered and displays scattered CAIs.

Petrography: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi); The thin section displays a chondritic texture, with PO and POP chondrules ranging from 800 to 1200 μm in a fine grained matrix. PO chondrules display zoned olivine crystals. POP chondrules display olivine grains and elongated pyroxene grains. Olivine is markedly inhomogenesous and Mg-rich in chondrules, while Fe-rich in the matrix. Orthopyroxene in chondrules is inhomogeneous, with a core-rim variability. Plagioclase is Na and K-rich. Opaque phases are consisting of iron oxides, Fe-Ni alloys and troilite as individual grains scattered in the matrix or rimming chondrules.

Geochemistry: EMP (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi); Olivine in chondrules (Fa14.5±9.5Fo85.5±9.5; Fe/Mn = 63.0, n=33 ); Olivine in matrix (Fa34.3±1.4Fo65.6±1.7 Fe/Mn = 62.9, n=10); Orthopyroxene in chondrules (Fs11.1±7.0En88.2±6.8Wo0.7±0.1, Fe/Mn = 25.2, n=15); Orthopyroxene in matrix (Fs25.4±1.5En72.7±1.3Wo1.9±0.1, Fe/Mn = 34.3, n=6); plagioclase (An40.1Or46.7); Oxygen isotopes (I. Franchi, R.Greenwood, OU): δ17O = 3.99, δ18O = 5.79, Δ17O = 0.973, all permil.

Classification: Ordinary Chondrite (LL3); S2; W2. Estimated subtype LL3.3.

Specimens: A total of 21.7 g specimen is on deposit at MSN-FI, Inv.#3456-I). Tomelleri holds the main mass.

Data from:
  MB109
  Table 0
  Line 0:
State/Prov/County:Morocco
Place of purchase:Erfoud
Date:P 2018
Mass (g):4530
Pieces:1
Class:LL3
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):14.5±9.5 (n=33, chon);34.3±1.4 (n=10, matr);
Ferrosilite (mol%):11.1±7.0 (n=15, chon);25.4±1.5 (n=6, matr);
Wollastonite (mol%):0.9±0.1;1.9±0.1;
Classifier:V. Moggi Cecchi, G. Pratesi, UniFi
Type spec mass (g):21.7
Type spec location:MSN-FI
Main mass:Tomelleri
Comments:Field label Tagounite; submitted by Vanni Moggi Cecchi
Plots: O isotopes:  
Institutions
   and collections
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
MSN-FI: MUSEO DI STORIA NATURALE DELL'UNIVERSITA' DEGLI STUDI DI FIRENZE Via Giorgio La Pira, 4 – 50121 FIRENZE, Italy; Website (institutional address; updated 14 Jan 2015)
UniFi: Università degli Studi di Firenze, P.zza S. Marco, 4 - 50121 Firenze, Italy (institutional address; updated 14 Sep 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1670 approved meteorites from Morocco (plus 23 unapproved names) (plus 1 impact crater)

Direct link to this page