Mafra meteorite, Mafra, Santa Catarina, Brazili
| Regional Level Types | |
|---|---|
| Mafra meteorite | Meteorite Fall Location |
| Mafra | City |
| Santa Catarina | State |
| Brazil | Country |
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Latitude & Longitude (WGS84):
26° 10' 0'' South , 49° 55' 60'' West
Latitude & Longitude (decimal):
Locality type:
Meteorite Class:
Meteoritical Society Class:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Mafra | 40,081 (2012) | 14.2km |
| Rio Negro | 23,006 (2012) | 15.1km |
| Três Barras | 14,855 (2012) | 39.4km |
| Rio Negrinho | 41,914 (2012) | 42.5km |
| Canoinhas | 38,862 (2012) | 45.6km |
Unequilibrated Ordinary chondrite, brecciated (L3-4,br; S3)
Fell, 1941; 600 g
Several fragments of a brecciated and shocked meteorite stone were recovered near Mafra at an indefinite date and one 8X6X5 cm stone was preserved. Prominent rounded olivine and pyroxene chondrules (and fragments) dominate a microcrystalline matrix with turbid glass. Olivine is unequilibrated and marked by kink bands due to shock. Both orthopyroxene and clinopyroxene are present as well as minor plagioclase. Accessory troilite is also present, but Fe-Ni metal is apparently quite sparse. A small C-bearing clast was noted. Small mineralogically uncharacterized phosphates are also reported.
The meteorite is described as a 'genomict breccia' as its primary constituents are a mechanical mixture of equilibrated L4 material with unequilibrated L3 material derived, presumably, from the same original parent body. Some additional complexities, small microchondrules, and small blebs would be due to the forcible impact that brought the material together before (or during) an eventual ejection into space.
Mafra is the only witnessed L3-4 meteorite fall currently listed at the Meteoritical Bulletin Database. Its 600 g mass exceeds the total mass of the 3 small L3-4 finds that have also been recovered (as of Oct 2015).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
4 valid minerals.
Meteorite/Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Chromite Formula: Fe2+Cr3+2O4 Reference: omes, C.B. & Keil, K. (1980) Brazilian Stony Meteorites: University of New Mexico Press: Albuquerque. 162 pages. |
| ⓘ 'Clinopyroxene Subgroup' Description: Clinopyroxene fragments. Reference: Levi-Donati, G. R., Shima, M. & Sighinolfi, G. P. (1976) Brazilian meteorites - The Mafra, Santa Catarina State, chondrite: Meteoritics 11(1): 29-41. (Mar 1976).; omes, C.B. & Keil, K. (1980) Brazilian Stony Meteorites: University of New Mexico Press: Albuquerque. 162 pages. |
| ⓘ 'Fayalite-Forsterite Series' Reference: Mason, B. (1963) Olivine composition in chondrites. Geochimica et Cosmochimica Acta 27, 1011-1023.; Levi-Donati, G. R., Shima, M. & Sighinolfi, G. P. (1976) Brazilian meteorites - The Mafra, Santa Catarina State, chondrite: Meteoritics 11(1): 29-41. (Mar 1976).; Lange, D.E. & Keil, K. (1979) The Mafra Meteorite and Its Lithic Clasts: A Genomict L-Group Chondrite Breccia (abstract). Meteoritics 14: 472-473. (Dec 1979).; Graham, A. L., Bevan, A. W. R. & Hutchison, B. (1985) Catalogue of Meteorites (4/e). University of Arizona Press: Tucson. |
| ⓘ Forsterite Formula: Mg2SiO4 Description: Forsterite (sensu strictu) Olivine (Fa<7) grains in matrix. Reference: omes, C.B. & Keil, K. (1980) Brazilian Stony Meteorites: University of New Mexico Press: Albuquerque. 162 pages. |
| ⓘ 'Glass' Reference: Lange, D.E. & Keil, K. (1979) The Mafra Meteorite and Its Lithic Clasts: A Genomict L-Group Chondrite Breccia (abstract). Meteoritics 14: 472-473. (Dec 1979). |
| ⓘ Ilmenite Formula: Fe2+TiO3 Description: Quite rare. Reference: Levi-Donati, G. R., Shima, M. & Sighinolfi, G. P. (1976) Brazilian meteorites - The Mafra, Santa Catarina State, chondrite: Meteoritics 11(1): 29-41. (Mar 1976).; omes, C.B. & Keil, K. (1980) Brazilian Stony Meteorites: University of New Mexico Press: Albuquerque. 162 pages. |
| ⓘ 'Meteoritic Iron' Reference: Levi-Donati, G. R., Shima, M. & Sighinolfi, G. P. (1976) Brazilian meteorites - The Mafra, Santa Catarina State, chondrite: Meteoritics 11(1): 29-41. (Mar 1976). |
| ⓘ 'Orthopyroxene Subgroup' Description: Orthorhombic crystals are present. Reference: Levi-Donati, G. R., Shima, M. & Sighinolfi, G. P. (1976) Brazilian meteorites - The Mafra, Santa Catarina State, chondrite: Meteoritics 11(1): 29-41. (Mar 1976). |
| ⓘ 'Plagioclase' Formula: (Na,Ca)[(Si,Al)AlSi2]O8 Reference: Levi-Donati, G. R., Shima, M. & Sighinolfi, G. P. (1976) Brazilian meteorites - The Mafra, Santa Catarina State, chondrite: Meteoritics 11(1): 29-41. (Mar 1976). |
| ⓘ Troilite Formula: FeS Reference: Levi-Donati, G. R., Shima, M. & Sighinolfi, G. P. (1976) Brazilian meteorites - The Mafra, Santa Catarina State, chondrite: Meteoritics 11(1): 29-41. (Mar 1976).; omes, C.B. & Keil, K. (1980) Brazilian Stony Meteorites: University of New Mexico Press: Albuquerque. 162 pages. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Troilite | 2.CC.10 | FeS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
| ⓘ | Ilmenite | 4.CB.05 | Fe2+TiO3 |
| Group 9 - Silicates | |||
| ⓘ | Forsterite | 9.AC.05 | Mg2SiO4 |
| Unclassified Minerals, Rocks, etc. | |||
| ⓘ | 'Clinopyroxene Subgroup' | - | |
| ⓘ | 'Fayalite-Forsterite Series' | - | |
| ⓘ | 'Glass' | - | |
| ⓘ | 'Meteoritic Iron' | - | |
| ⓘ | 'Orthopyroxene Subgroup' | - | |
| ⓘ | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Ilmenite | Fe2+TiO3 |
| O | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| O | ⓘ Forsterite | Mg2SiO4 |
| Na | Sodium | |
| Na | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Mg | Magnesium | |
| Mg | ⓘ Forsterite | Mg2SiO4 |
| Al | Aluminium | |
| Al | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | Silicon | |
| Si | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | ⓘ Forsterite | Mg2SiO4 |
| S | Sulfur | |
| S | ⓘ Troilite | FeS |
| Ca | Calcium | |
| Ca | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Ti | Titanium | |
| Ti | ⓘ Ilmenite | Fe2+TiO3 |
| Cr | Chromium | |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | ⓘ Ilmenite | Fe2+TiO3 |
| Fe | ⓘ Troilite | FeS |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Mason, B. (1963) Olivine composition in chondrites. Geochimica et Cosmochimica Acta 27, 1011-1023.
Levi-Donati, G. R., Shima, M. & Sighinolfi, G. P. (1976) Brazilian meteorites - The Mafra, Santa Catarina State, chondrite: Meteoritics 11(1): 29-41. (Mar 1976).
Gomes, C.B. & Keil, K. (1980) Brazilian Stony Meteorites: University of New Mexico Press: Albuquerque. 162 pages.
Graham, A. L., Bevan, A. W. R. & Hutchison, B. (1985) Catalogue of Meteorites (4/e). University of Arizona Press: Tucson.
Lange, D.E. & Keil, K. (1979) The Mafra Meteorite and Its Lithic Clasts: A Genomict L-Group Chondrite Breccia (abstract). Meteoritics 14: 472-473. (Dec 1979).
Grady, M.M. (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge; New York; Oakleigh; Madrid; Cape Town. 689 pages
.
Lauretta, D.S. & McSween Jr., H.Y., Editors (2006). Meteorites and the Early Solar System II. University of Arizona Press: Tucson, Arizona. 943 pages.
Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages.
External Links
http://www.lpi.usra.edu/meteor/metbull.php - Meteoritical Bulletin Database
http://www.lpi.usra.edu/meteor/metbull.php?code=15383 -Mafra@MetBullDatabase
http://www.lpi.usra.edu/meteor/get_original_photo.php?recno=5666015 -Photo
http://articles.adsabs.harvard.edu/full/1976Metic..11...29L - Levi-Donati et al.,1976.
http://articles.adsabs.harvard.edu/full/seri/Metic/0014//0000472.000.html?high=522bbd4aea07905 -lithology from Lange & Keil (1979).
http://www.lpi.usra.edu/meteor/metbull.php?code=15383 -Mafra@MetBullDatabase
http://www.lpi.usra.edu/meteor/get_original_photo.php?recno=5666015 -Photo
http://articles.adsabs.harvard.edu/full/1976Metic..11...29L - Levi-Donati et al.,1976.
http://articles.adsabs.harvard.edu/full/seri/Metic/0014//0000472.000.html?high=522bbd4aea07905 -lithology from Lange & Keil (1979).
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