Roberts Massif 04261 Martian meteorite (RBT 04261), Roberts Massif, Queen Maud Land, Eastern Antarctica, Antarcticai
Regional Level Types | |
---|---|
Roberts Massif 04261 Martian meteorite (RBT 04261) | Meteorite Fall Location |
Roberts Massif | Massif |
Queen Maud Land | Region |
Eastern Antarctica | Region |
Antarctica | Continent |
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Key
Latitude & Longitude (WGS84):
85° South , 177° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~1km
Locality type:
Meteorite Class:
Meteoritical Society Class:
Origin locality:
Köppen climate type:
Martian Meteorite (Olivine-phyric shergottite)
Find, 2004; 283.4 g, 2 stones
Roberts Massif 04261 (RBT 04261) is a small meteorite collected by the US Antarctic Search for Meteorites program. The exteriors of the two pieces are partially covered with a dark fusion crust with glassy spots. Interiors have a low metal content. Sections reveal unequilibrated olivine (Fa28-40), pigeonite (Fs20-27), augite, and maskelynite (composition An30-55). Sulfides, oxides, and shock-melt veins are present. Fe/Mn ratios and other features indicate that the meteorite is an unusual Martian meteorite.
What's in a name? Two stones (labelled 'RBT 04261' [78.6 g] and 'RBT 04262' [204.8 g]) were found 790 meters apart. It is possible that the two stones entered the earth's atmosphere as already separated stones. However, their shared textures and cumulative CRE/terrestrial exposure ages indicate that they should be considered fragments of the same fall. Consequently, the meteorite's name is then the name of the first fragment to be recognized a meteorite 'Roberts Massif 04261'(abbr., 'RBT 04261').
Select Mineral List Type
Standard Detailed Gallery Strunz Dana Chemical ElementsMineral List
7 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:
ⓘ Augite Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6 Reference: Satterwhite, C. & Righter, K. (2007) Antarctic Meteorite Newsletter 30 (1): pp. 20. (Feb 2007); Papike, J.J., Karner, J.M., Shearer, C.K. & Burger, P.V. (2009) Silicate mineralogy of martian meteorites (Invited Review): Geochimica et Cosmochimica Acta 73: 7443-7485. (15 Dec2009) |
ⓘ Baddeleyite Formula: ZrO2 Reference: Takafumi Niihara, Hiroshi Kaiden, Keiji Misawa (2011) Petrology and Mineralogy of the RBT 04261 Shergottite. Japan Geooscience Union Meeting Makuhari, Chiba Japan.; Niihara, T., Misawa, K., Horie, K. & Kaiden, H. (2010) Young U-Pb Age of Baddeleyite in Enriched Shergottite RBT 04261: Meteoritics & Planetary Science 45 (Supplement): p. A152, pdf#5207. (Sept 2010) |
ⓘ 'Chrome-Spinel (of Dana)' Reference: Papike, J.J., Karner, J.M., Shearer, C.K. & Burger, P.V. (2009) Silicate mineralogy of martian meteorites (Invited Review): Geochimica et Cosmochimica Acta 73: 7443-7485. (15 Dec2009) |
ⓘ Chromite Formula: Fe2+Cr3+2O4 Reference: Usui, T., Sanborn, M., Wadhwa, M. & McSween Jr, H.Y. (2010) Petrology and trace element geochemistry of Robert Massif 04261 and 04262 meteorites, the first examples of geochemically enriched lherzolitic shergottites: Geochimica et Cosmochimica Acta 74(24): 7283-7306. (Dec 2010) |
ⓘ 'Fayalite-Forsterite Series' Reference: Takafumi Niihara, Hiroshi Kaiden, Keiji Misawa (2011) Petrology and Mineralogy of the RBT 04261 Shergottite. Japan Geooscience Union Meeting Makuhari, Chiba Japan.; Satterwhite, C. & Righter, K. (2007) Antarctic Meteorite Newsletter 30 (1): pp. 20. (Feb 2007); Papike, J.J., Karner, J.M., Shearer, C.K. & Burger, P.V. (2009) Silicate mineralogy of martian meteorites (Invited Review): Geochimica et Cosmochimica Acta 73: 7443-7485. (15 Dec2009) ; Usui, T., Sanborn, M., Wadhwa, M. & McSween Jr, H.Y. (2010) Petrology and trace element geochemistry of Robert Massif 04261 and 04262 meteorites, the first examples of geochemically enriched lherzolitic shergottites: Geochimica et Cosmochimica Acta 74(24): 7283-7306. (Dec 2010) |
ⓘ Ilmenite Formula: Fe2+TiO3 Reference: Takafumi Niihara, Hiroshi Kaiden, Keiji Misawa (2011) Petrology and Mineralogy of the RBT 04261 Shergottite. Japan Geooscience Union Meeting Makuhari, Chiba Japan.; Usui, T., Sanborn, M., Wadhwa, M. & McSween Jr, H.Y. (2010) Petrology and trace element geochemistry of Robert Massif 04261 and 04262 meteorites, the first examples of geochemically enriched lherzolitic shergottites: Geochimica et Cosmochimica Acta 74(24): 7283-7306. (Dec 2010); Niihara, T., Misawa, K., Horie, K. & Kaiden, H. (2010) Young U-Pb Age of Baddeleyite in Enriched Shergottite RBT 04261: Meteoritics & Planetary Science 45 (Supplement): p. A152, pdf#5207. (Sept 2010) |
ⓘ 'Maskelynite' Reference: Takafumi Niihara, Hiroshi Kaiden, Keiji Misawa (2011) Petrology and Mineralogy of the RBT 04261 Shergottite. Japan Geooscience Union Meeting Makuhari, Chiba Japan.; Satterwhite, C. & Righter, K. (2007) Antarctic Meteorite Newsletter 30 (1): pp. 20. (Feb 2007); Papike, J.J., Karner, J.M., Shearer, C.K. & Burger, P.V. (2009) Silicate mineralogy of martian meteorites (Invited Review): Geochimica et Cosmochimica Acta 73: 7443-7485. (15 Dec2009) ; Usui, T., Sanborn, M., Wadhwa, M. & McSween Jr, H.Y. (2010) Petrology and trace element geochemistry of Robert Massif 04261 and 04262 meteorites, the first examples of geochemically enriched lherzolitic shergottites: Geochimica et Cosmochimica Acta 74(24): 7283-7306. (Dec 2010); Niihara, T., Misawa, K., Horie, K. & Kaiden, H. (2010) Young U-Pb Age of Baddeleyite in Enriched Shergottite RBT 04261: Meteoritics & Planetary Science 45 (Supplement): p. A152, pdf#5207. (Sept 2010) |
ⓘ Merrillite Formula: Ca9NaMg(PO4)7 Reference: Usui, T., Sanborn, M., Wadhwa, M. & McSween Jr, H.Y. (2010) Petrology and trace element geochemistry of Robert Massif 04261 and 04262 meteorites, the first examples of geochemically enriched lherzolitic shergottites: Geochimica et Cosmochimica Acta 74(24): 7283-7306. (Dec 2010) |
ⓘ Pigeonite Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6 Reference: Satterwhite, C. & Righter, K. (2007) Antarctic Meteorite Newsletter 30 (1): pp. 20. (Feb 2007); Papike, J.J., Karner, J.M., Shearer, C.K. & Burger, P.V. (2009) Silicate mineralogy of martian meteorites (Invited Review): Geochimica et Cosmochimica Acta 73: 7443-7485. (15 Dec2009) |
ⓘ 'Pyroxene Group' Reference: Takafumi Niihara, Hiroshi Kaiden, Keiji Misawa (2011) Petrology and Mineralogy of the RBT 04261 Shergottite. Japan Geooscience Union Meeting Makuhari, Chiba Japan.; Usui, T., Sanborn, M., Wadhwa, M. & McSween Jr, H.Y. (2010) Petrology and trace element geochemistry of Robert Massif 04261 and 04262 meteorites, the first examples of geochemically enriched lherzolitic shergottites: Geochimica et Cosmochimica Acta 74(24): 7283-7306. (Dec 2010) |
ⓘ Spinel Formula: MgAl2O4 Reference: Papike, J.J., Karner, J.M., Shearer, C.K. & Burger, P.V. (2009) Silicate mineralogy of martian meteorites (Invited Review): Geochimica et Cosmochimica Acta 73: 7443-7485. (15 Dec2009) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 4 - Oxides and Hydroxides | |||
---|---|---|---|
ⓘ | Baddeleyite | 4.DE.35 | ZrO2 |
ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
ⓘ | Ilmenite | 4.CB.05 | Fe2+TiO3 |
ⓘ | Spinel | 4.BB.05 | MgAl2O4 |
Group 8 - Phosphates, Arsenates and Vanadates | |||
ⓘ | Merrillite | 8.AC.45 | Ca9NaMg(PO4)7 |
Group 9 - Silicates | |||
ⓘ | Augite | 9.DA.15 | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
ⓘ | Pigeonite | 9.DA.10 | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Unclassified Minerals, Rocks, etc. | |||
ⓘ | 'Chrome-Spinel (of Dana)' | - | |
ⓘ | 'Fayalite-Forsterite Series' | - | |
ⓘ | 'Maskelynite' | - | |
ⓘ | 'Pyroxene Group' | - |
List of minerals arranged by Dana 8th Edition classification
Group 4 - SIMPLE OXIDES | |||
---|---|---|---|
A2X3 | |||
ⓘ | Ilmenite | 4.3.5.1 | Fe2+TiO3 |
AX2 | |||
ⓘ | Baddeleyite | 4.4.14.1 | ZrO2 |
Group 7 - MULTIPLE OXIDES | |||
AB2X4 | |||
ⓘ | Chromite | 7.2.3.3 | Fe2+Cr3+2O4 |
ⓘ | Spinel | 7.2.1.1 | MgAl2O4 |
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES | |||
(AB)3(XO4)2 | |||
ⓘ | Merrillite | 38.3.4.4 | Ca9NaMg(PO4)7 |
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1) | |||
Single-Width Unbranched Chains, W=1 with chains P=2 | |||
ⓘ | Augite | 65.1.3a.3 | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
ⓘ | Pigeonite | 65.1.1.4 | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Unclassified Minerals, Mixtures, etc. | |||
ⓘ | 'Chrome-Spinel (of Dana)' | - | |
ⓘ | 'Fayalite-Forsterite Series' | - | |
ⓘ | 'Maskelynite' | - | |
ⓘ | 'Pyroxene Group' | - |
List of minerals for each chemical element
O | Oxygen | |
---|---|---|
O | ⓘ Ilmenite | Fe2+TiO3 |
O | ⓘ Baddeleyite | ZrO2 |
O | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
O | ⓘ Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
O | ⓘ Chromite | Fe2+Cr23+O4 |
O | ⓘ Merrillite | Ca9NaMg(PO4)7 |
O | ⓘ Spinel | MgAl2O4 |
Na | Sodium | |
Na | ⓘ Merrillite | Ca9NaMg(PO4)7 |
Mg | Magnesium | |
Mg | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Mg | ⓘ Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Mg | ⓘ Merrillite | Ca9NaMg(PO4)7 |
Mg | ⓘ Spinel | MgAl2O4 |
Al | Aluminium | |
Al | ⓘ Spinel | MgAl2O4 |
Si | Silicon | |
Si | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Si | ⓘ Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
P | Phosphorus | |
P | ⓘ Merrillite | Ca9NaMg(PO4)7 |
Ca | Calcium | |
Ca | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Ca | ⓘ Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Ca | ⓘ Merrillite | Ca9NaMg(PO4)7 |
Ti | Titanium | |
Ti | ⓘ Ilmenite | Fe2+TiO3 |
Cr | Chromium | |
Cr | ⓘ Chromite | Fe2+Cr23+O4 |
Fe | Iron | |
Fe | ⓘ Ilmenite | Fe2+TiO3 |
Fe | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Fe | ⓘ Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
Fe | ⓘ Chromite | Fe2+Cr23+O4 |
Zr | Zirconium | |
Zr | ⓘ Baddeleyite | ZrO2 |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Satterwhite, C., Righter, K. (2007) Antarctic Meteorite Newsletter, 30(1), 20 (Feb 2007).
Papike, J.J., Karner, J.M., Shearer, C.K., Burger, P.V. (2009) Silicate mineralogy of martian meteorites (Invited Review). Geochimica et Cosmochimica Acta, 73, 7443-7485 (15 Dec 2009).
Niihara, T., Misawa, K., Horie, K., Kaiden, H. (2010) Young U-Pb Age of Baddeleyite in Enriched Shergottite RBT 04261. Meteoritics & Planetary Science, 45 (Supplement), A152, pdf#5207 (Sept 2010).
Usui, T., Sanborn, M., Wadhwa, M., McSween Jr, H.Y. (2010) Petrology and trace element geochemistry of Robert Massif 04261 and 04262 meteorites, the first examples of geochemically enriched lherzolitic shergottites. Geochimica et Cosmochimica Acta, 74(24), 7283-7306 (Dec 2010).
Takafumi Niihara, Hiroshi Kaiden, Keiji Misawa (2011) Petrology and Mineralogy of the RBT 04261 Shergottite. Japan Geoscience Union Meeting Makuhari, Chiba Japan.
External Links
http://curator.jsc.nasa.gov/antmet/amn/amnfeb07/AMNFEB2007.pdf -AMN 30(1)
http://www.lpi.usra.edu/meteor/metbull.php - MeteoriticalBulletinDatabase
https://www.lpi.usra.edu/meteor/metbull.php?code=44664 -RBT04261@MetBullDatabase
http://www.lpi.usra.edu/meteor/get_original_photo.php?recno=5633377 -photo
http://www.lpi.usra.edu/meetings/lpsc2012/pdf/2673.pdf -pairing of RBT4261/4262
http://adsabs.harvard.edu/abs/2010GeCoA..74.7283U -geochemistry
http://www.lpi.usra.edu/meteor/metbull.php - MeteoriticalBulletinDatabase
https://www.lpi.usra.edu/meteor/metbull.php?code=44664 -RBT04261@MetBullDatabase
http://www.lpi.usra.edu/meteor/get_original_photo.php?recno=5633377 -photo
http://www.lpi.usra.edu/meetings/lpsc2012/pdf/2673.pdf -pairing of RBT4261/4262
http://adsabs.harvard.edu/abs/2010GeCoA..74.7283U -geochemistry
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