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| Balcarce | |||||||||||||||||||||||||||||||||||||||
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| Basic information | Name: Balcarce This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2000 Country: Argentina Mass:  2.28 kg | ||||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 6459 approved meteorites (plus 2 unapproved names) classified as H4. [show all] Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||||||||||
| Comments: |
Approved 7 Mar 2019 Revised 5 Sep 2021: Corrected longitude | ||||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 108:
Balcarce 37°50’38.9"S, 58°21’50.0 Buenos Aires, Argentina Find: 2000 Jun 2 Classification: Ordinary chondrite (H4) History: As indicated in Turone (2001), several pieces, including the main mass of 1780 g, were found at the base of Cerro Amarante in June 2000. The total mass was 2280 g. Presently the main mass of 1366 g is in a private collection. Petrography: M.E. Varela and M. Saavedra (ICATE). Different types of chondrules are visible: BO, RP and POP with apparent diameter up to 1.2 mm. Chondrule fragments and isolated euhedral crystals of olivine and pyroxene up to 600 µm are common. Most chondrules have well defined edges. When present, chondrule mesostasis is recrystallized. Both the metal and the sulfides have irregular shapes with sizes ranging from 20 µm to 1.2 mm. Polycrystalline troilite grains are scarce. Shock features include olivine undulatory extinction, planar fractures and the presence of polycrystalline troilite. Weathering is moderate. Geochemistry: Mineral composition: A total of 80 analyses covered 10 areas in the two thin section studied. Olivine, Fa18.3; Pyroxene, Fs16.6Wo0.5. Minor phases: high-Ca pyroxene Fs7.8Wo38.4. Classification: Ordinary chondrite (H4) Specimens: Type specimen of 33.12 g is on deposit in the MLP. 54.8 g and four thin section are on deposit at ICATE. The main mass, 1366 g, is in the Eduardo Jawerbaum collection. | ||||||||||||||||||||||||||||||||||||||
| Bibliography: |
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| Data from: MB108 Table 0 Line 0: |
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| Institutions and collections |
MLP: Museo de La Plata
Paseo del Bosque
s/no B1900FWA
La Plata, Buenos Aires, Argentina (institutional address; updated 23 Dec 2017) ICATE: Instituto de Ciencias Astronomicas de la Tierra y del Espacio Av. España Sur 1512 – San Juan , Argentina; Website (institutional address; updated 31 Oct 2021) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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Geography:
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Statistics: This is 1 of 13 approved meteorites from Buenos Aires, Argentina (plus 3 unapproved names) This is 1 of 81 approved meteorites from Argentina (plus 9 unapproved names) (plus 2 impact craters) | ||||||||||||||||||||||||||||||||||||||
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