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| San Salvador River | |||||||||||||||||||||||||||||||||||||||
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| Basic information | Name: San Salvador River This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2015 Country: Uruguay Mass:  820 g | ||||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 11567 approved meteorites (plus 23 unapproved names) classified as H5. [show all] Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||||||||||
| Comments: | Approved 5 Apr 2020 | ||||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 109:
San Salvador River 33°35.93’S, 58°7.83’W Soriano, Uruguay Find: 2015 Classification: Ordinary chondrite (H5) History: The meteorite was found in 2015 by Rolando Bianchi Cendón about 11 km SE of the city of Dolores (Soriano Department, Uruguay), in alluvial deposits of the San Salvador River. Physical characteristics: Physical Characteristics: Light to dark brown, elongated stone with numerous open fractures. A network of veins is visible on cut surfaces (filled with alteration product, mainly iron oxides). Petrography: (L. Ferrière and S. Rajpriye, NHMV). This meteorite is a moderately weathered, fractured, and thermally metamorphosed chondrite. Chondrule boundaries and matrix are difficult to discern. The chondrules are mainly barred and porphyritic olivine-pyroxene types. Opaque phases include Fe-Ni metal (including tetrataenite, measuring up to 70 μm), metal oxides, and troilite. Accessories such as chromite, chlorapatite (heavily fractured, up to 100 μm), and merrillite (up to 200 μm) are also present. Fractures are common and are filled with alteration products, i.e., metal oxides of varying composition. A large fraction of the metal grains have been heavily altered and troilite grains are surrounded by iron oxides. A crust of alteration is seen at the surface, containing high-Ca pyroxene and a few quartz grains (of terrestrial origin). Exsolution lamellae occur in a number of troilite grains. Geochemistry: (L. Ferrière, S. Rajpriye, and D. Topa, NHMV). Olivine: Fa19.05±0.43 (Fa18.4-20.3) and Fe/Mn: 39.43±2.90 (N=20). Low-Ca pyroxene Fs16.99±0.83Wo1.34±0.32 (Fs16.0-19.2Wo0.0-1.6) and Fe/Mn: 24.32±3.79 (N=22). Plagioclase: An10.93±0.46Ab84.37±0.67Or4.70±0.73 (An10.4-12.1Ab83.1-85.3Or4.0-6.5) (N=11). Kamacite: Ni 5.43±1.02 (3.99-6.31), Co 0.39±0.15 wt% (N=6). Taenite: Ni 28.13±4.79 (20.83-35.61), Co 0.14±0.03 wt% (N=9). Tetrataenite: Ni 50.64±1.27 (48.06-52.20), Co 0.07±0.04 wt% (N=11). Chromite: Cr#: 0.86, Fe#: 0.85. Classification: Ordinary Chondrite (H5), S3, W3 Specimens: The main mass (765 g) is with the finder (Rolando Bianchi Cendón, Uruguay); Two fragments (NHMV-O1892 and NHMV-O1790, 31.29 g and 13.75 g, respectively) as well as one polished thin section (NHMV-O1791) and a polished thick section (NHMV-O1792) are at NHMV. | ||||||||||||||||||||||||||||||||||||||
| Data from: MB109 Table 0 Line 0: |
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| Institutions and collections |
NHMV: Naturhistorisches Museum, Burgring 7, 1010 Wien, Austria, Austria; Website (institutional address; updated 18 Jan 2019) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography:
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Statistics: This is the only approved meteorite from Soriano, Uruguay This is 1 of 2 approved meteorites from Uruguay | ||||||||||||||||||||||||||||||||||||||
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| Revision history: |
This lists important revisions made to data for this record.
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