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La Ciénega (b) | |||||||||||||||||||||||||||||||||||||
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Basic information | Name: La Ciénega (b) This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2014 Country: Mexico Mass: 6.14 kg | ||||||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 12727 approved meteorites (plus 11 unapproved names) classified as L6. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||||||||
Comments: | Approved 24 Sep 2016 | ||||||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 105:
La Ciénega (b) 30°12’03.5"N, 111°56’24.97"W Sonora, Mexico Find: 2014 Jan 30 Classification: Ordinary chondrite (L6) History: On the 30 January 2014, Hugo Lino was prospecting for gold near the abandoned mining community of La Ciénega in Sonora, Mexico, and found a 6143 g, fusion crusted meteorite. The stone was subsequently purchased by Michael Farmer. Physical characteristics: A relatively fresh fusion crusted rounded stone with a few broad regmaglypts. Sawn surface is largely light colored with scattered rust staining around metal grains. Metal evenly distributed with grains to 2 mm. Chondrules difficult to recognize, with one to 4 mm. Petrography: (L. Garvie, ASU) This section shows that the stone is largely recrystallized with difficult-to-recognize chondrules, including BO, PO, and RP. Many olivine grains with planar fractures. Plagioclase abundant and often >100 μm. Chromite irregularly shaped, to 600 μm. Kamacite irregularly shaped with weakly developed Neumann bands; some grains polycrystalline. Metal grains of tetrataenite rims and cores of dark-etching plessite or acicular kamacite common. Troilite largely single crystal and lacking shock features. Sparse metal pockets around troilite and metal. Native Cu is rare to 20 microns. Weathering is low and locally present around some kamacite grains. Many of the metal-troilite grains show complex finely intergrown textures of the two. Geochemistry: (L. Garvie, ASU) Olivine, Fa24.5±0.3, Fe/Mn=48.2±2.0, n=10; low Ca-pyroxene, Fs20.6±0.1Wo1.5±0.2, Fe/Mn=28.2, n=8; high Ca-pyroxene, Fs8.0Wo44.6, Fe/Mn=28.2, n=1; and, feldspar, Or5.9±0.7An10.4±0.2, n=5. Classification: L6, W1, S3 Specimens: 164 g and one thin section at ASU. | ||||||||||||||||||||||||||||||||||||
Data from: MB105 Table 0 Line 0: |
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Institutions and collections |
ASU: Center for Meteorite Studies, Arizona State University, Tempe, Arizona 85287-1404, United States; Website (institutional address; updated 14 Jan 2012) MFarmer: Michael Farmer, P.O. Box 86059, Tucson, AZ 85754-6059, United States; Website (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Geography: |
Statistics: This is 1 of 9 approved meteorites from Sonora, Mexico This is 1 of 112 approved meteorites from Mexico (plus 5 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||||||||
Proximity search: | |||||||||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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