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| Lynch 002 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Lynch 002 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2010 Country: Australia Mass:  36.5 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 103 approved meteorites classified as Lunar. [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||||||||
| Comments: | Approved 25 May 2012 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 100:
Lynch 002 31°23’58.3"S, 127°08’40.8"E Western Australia, Australia Found: 25 Sept 2010 Classification: Lunar meteorite History: A weathered mass was found on an open plain during systematic meteorite searching. Physical characteristics: The 36.54 g irregularly shaped stone lacks fusion crust and measures 4 × 4 × 2 cm. It has a dark, desert-varnished surface. Petrography: (C. L. Smith and A. T. Kearsley, NHM) The sample is highly brecciated from the micro to macro-scale, and contains numerous clasts in a heterogeneous, brecciated matrix. Melt veins, some containing blebs of Fe-Ni metal, are pervasive. Melt spherules are also observed. Larger clasts to ~1 mm are composed of basaltic lithologies, melt clasts, KREEP-rich clasts, and pyroxferroites. The matrix is brecciated and heterogeneous and is composed of mono and polymineralic fragments. Many of the smaller polymineralic fragments appear similar to the larger clasts. Matrix consists predominantly of pyroxene and feldspar. Irregularly shaped Fe-Ni metal grains (few micrometers to few tens of micrometers) occur and sulphide and schreibersite are also observed. Ilmenite grains are fairly abundant. Accessory phases include baddeleyite and silica. The sample is moderately fractured and carbonate veins fill cracks and voids. No fusion crust remains, although there is a distinct weathering rind preserved in some places. Geochemistry: Representative large clasts; basaltic clast pyroxene (Fs24.5-41.8Wo6.1-34.3, Fe/Mn=58.4-74.3 and Fs18.9-72.2Wo4.9-24.1, Fe/Mn=51.1-77.6), plagioclase (An86.7-93.6Or0.4-2.5 and An88.3-92.1Or0.7-2.0); pyroxferroite clast (Fs45.0-58.8Wo21.5-39.0, Fe/Mn=71.5-96.8). Matrix low-Ca pyroxene (Fs20.4-74.9Wo1.6-17.8, Fe/Mn=47.8-76.3), high-Ca pyroxene (Fs6.6-70.1Wo20.5-51.4, Fe/Mn=40.0-96.0), plagioclase (An83.4-98.8Or0.0-1.5). All analyses by EPMA. Oxygen Isotopes: I. A. Franchi (OU) δ17O = 3.638, 3.470 δ18O = 7.005, 6.676 Δ17O = -0.005, -0.002 all values in per mil. Bulk acid washed sample. Classification: Achondrite, lunar breccia with moderate to high weathering. Specimens: Main mass and one polished block at WAM. | ||||||||||||||||||||||||||||||
| Data from: MB100 Table 1 Line 567: |
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| Plots: | O isotopes: | ||||||||||||||||||||||||||||||
| Institutions and collections |
NHM: Department of Mineralogy, The Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom; Website (institutional address; updated 9 Dec 2011) 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) WAM: Department of Earth & Planetary Sciences, Western Australian Museum. Locked Bag 49, Welshpool DC, Western Australia 6986, Australia; Website (institutional address; updated 18 Oct 2011) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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Geography:
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Statistics: This is 1 of 348 approved meteorites from Western Australia, Australia (plus 1 unapproved name) (plus 11 impact craters) This is 1 of 718 approved meteorites from Australia (plus 46 unapproved names) (plus 27 impact craters) | ||||||||||||||||||||||||||||||
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