| MetSoc Home Publications Contacts |
|
||
|
||
| El Tiro | |||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basic information | Name: El Tiro This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2013 Country: Mexico Mass:  2.44 kg | ||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 848 approved meteorites (plus 2 unapproved names) classified as L3. [show all] Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||||||
| Comments: | Approved 1 Nov 2015 | ||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 104:
El Tiro 30.279230°N, 111.817131°W Sonora, Mexico Find: Jan 2013 Classification: Ordinary chondrite (L3) History: A single stone showing weathering cracks, some remnant fusion crust, and shallow regmaglypts was found by a gold prospector close to the settlement of El Tiro in Sonora, Mexico. Physical characteristics: Single stone. A saw cut and polished slices reveal many densely packed chondrules of variable size set in a dark brown groundmass. This meteorite also contains breccia clasts and fragments up to ~1 cm in size. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous unequilibrated chondrules, apparent mean diameter many with porphyritic, igneously zoned olivines and pyroxenes. Some scattered, opaque, fine-grained matrix is present. A few high-Ca pyroxenes were observed. Only small amounts of very fine-grained plagioclase were observed. Geochemistry: (C. Agee and N. Muttik, UNM) Chondrule olivine Fa21.4±8.8, Fe/Mn=65±26, Cr2O3=0.06±0.05 wt%, n=10, chondrule low-Ca pyroxene Fs20.4±1.0Wo2.0±1.2, Fe/Mn=29±2, n=7. Classification: Ordinary chondrite L3, estimated type 3.4-3.6 based on mean values and 1-sigma of Fa and Cr2O3-content of ferroan olivines. Specimens: 23.1 g including a probe mount on deposit at UNM, Aerolite Meteorites holds the main mass. | ||||||||||||||||||||||||||||||||||
| Data from: MB104 Table 0 Line 0: |
|
||||||||||||||||||||||||||||||||||
| Institutions and collections |
UNM: Institute of Meteoritics
MSC03 2050
University of New Mexico
Albuquerque NM 87131-1126
USA, United States; Website (institutional address; updated 12 Feb 2015) |
||||||||||||||||||||||||||||||||||
| Catalogs: |
| ||||||||||||||||||||||||||||||||||
| References: | Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
| ||||||||||||||||||||||||||||||||||
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: |
This lists the most popular meteorites among people who looked up this meteorite.
| ||||||||||||||||||||||||||||||||||
| Revision history: |
This lists important revisions made to data for this record.
| ||||||||||||||||||||||||||||||||||