Sayama meteorite, Sayama City, Saitama Prefecture, Japani
| Regional Level Types | |
|---|---|
| Sayama meteorite | Meteorite Fall Location |
| Sayama City | City |
| Saitama Prefecture | Prefecture |
| Japan | Country |
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Latitude & Longitude (WGS84):
35° 52' North , 139° 24' East
Latitude & Longitude (decimal):
Locality type:
Meteorite Class:
Meteoritical Society Class:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Sayama | 160,843 (2017) | 1.9km |
| Hannō | 86,262 (2017) | 7.6km |
| Kawagoe | 337,931 (2017) | 9.0km |
| Tokorozawa | 339,435 (2017) | 9.7km |
| Sakado | 96,656 (2017) | 10.1km |
Carbonaceous Chondrite (CM2)
A 430 g meteorite was noticed on or about 29 April 1986, but was not collected until after a rain and subsequent discovery of a meteorite-produced hole in the roof. Sayama is a CM (Mighei-like) Carbonaceous Chondrite. The CMs are distinguished by small chondrules, refractory inclusions, abundant fine-grained matrix, and abundant hydrated minerals. Sayama’s matrix is unusually pervasive even for a CM meteorite. Evidence of hydrous alteration abounds — serpentine is often pseudomorphic after olivine while magnetite forms rinds around sulfides. Textural, isotopic, and kinetic considerations suggest that Sayama experienced slightly higher temperatures than other CMs during pre-terrestrial metamorphic aqueously driven alteration. Still, the fact that Sayama was not retrieved until after a rain merits a cautionary pause.
Pre-terrestrial alteration and subsequent minor terrestrial weathering have not erased some remarkable primordial features. While the phases were not directly observed, the signatures of both Diamond and silicon carbide are found in Sayama’s Ne isotopes anomalies. In addition, Ba isotopes indicate the presence of live Cs-135 in the early solar system.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
6 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:
| ⓘ 'Apatite' Formula: Ca5(PO4)3(Cl/F/OH) Reference: Takaoka et al., (2001) Sayama CM2 Chondrite: Fresh but Heavily Altered (abs. #1645). Lunar and Planetary Science Conference XXXII: Houston, Texas. (Mar 2001) |
| ⓘ Calcite Formula: CaCO3 Reference: Takaoka et al., (2001) Sayama CM2 Chondrite: Fresh but Heavily Altered (abs. #1645). Lunar and Planetary Science Conference XXXII: Houston, Texas. (Mar 2001) |
| ⓘ 'Chlorite Group' Description: a minor partner in the phyllosilicate mix Reference: Nakamura, T., Noguchi, T. & Yoneda, S. (2003). The Conditions of Aqueous Alteration Reactions Recorded in the Sayama CM2 Chondrite (abs. #5080). Meteoritics & Planetary Science 38 (7, Supplement), p. A47. (July 2003) |
| ⓘ Chromite Formula: Fe2+Cr3+2O4 Reference: Takaoka et al., (2001) Sayama CM2 Chondrite: Fresh but Heavily Altered (abs. #1645). Lunar and Planetary Science Conference XXXII: Houston, Texas. (Mar 2001) |
| ⓘ Dolomite Formula: CaMg(CO3)2 Description: major carbonate of both matrix & chondrules Reference: Nakamura, T., Noguchi, T. & Yoneda, S. (2003). The Conditions of Aqueous Alteration Reactions Recorded in the Sayama CM2 Chondrite (abs. #5080). Meteoritics & Planetary Science 38 (7, Supplement), p. A47. (July 2003) ; Takaoka et al., (2001) Sayama CM2 Chondrite: Fresh but Heavily Altered (abs. #1645). Lunar and Planetary Science Conference XXXII: Houston, Texas. (Mar 2001) |
| ⓘ 'Fayalite-Forsterite Series' Description: Forsterite-rich [Fa 0-23] Reference: Grossman, J. N. & Zipfel, J. (2001). The Meteoritical Bulletin, No. 85, 2001 September. Meteoritics & Planetary Science 36 (9), A293-A322. (Sept 2001); Nakamura, T., Noguchi, T. & Yoneda, S. (2003). The Conditions of Aqueous Alteration Reactions Recorded in the Sayama CM2 Chondrite (abs. #5080). Meteoritics & Planetary Science 38 (7, Supplement), p. A47. (July 2003) ; Takaoka et al., (2001) Sayama CM2 Chondrite: Fresh but Heavily Altered (abs. #1645). Lunar and Planetary Science Conference XXXII: Houston, Texas. (Mar 2001) |
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 Description: Forms rinds on Pentlandite and Pyrrhotite Reference: Takaoka et al., (2001) Sayama CM2 Chondrite: Fresh but Heavily Altered (abs. #1645). Lunar and Planetary Science Conference XXXII: Houston, Texas. (Mar 2001) |
| ⓘ Pentlandite Formula: (NixFey)Σ9S8 Description: In matrix Reference: Nakamura, T., Noguchi, T. & Yoneda, S. (2003). The Conditions of Aqueous Alteration Reactions Recorded in the Sayama CM2 Chondrite (abs. #5080). Meteoritics & Planetary Science 38 (7, Supplement), p. A47. (July 2003) ; Takaoka et al., (2001) Sayama CM2 Chondrite: Fresh but Heavily Altered (abs. #1645). Lunar and Planetary Science Conference XXXII: Houston, Texas. (Mar 2001) |
| ⓘ Pyrrhotite Formula: Fe1-xS Description: In matrix (rare) Reference: Nakamura, T., Noguchi, T. & Yoneda, S. (2003). The Conditions of Aqueous Alteration Reactions Recorded in the Sayama CM2 Chondrite (abs. #5080). Meteoritics & Planetary Science 38 (7, Supplement), p. A47. (July 2003) ; Takaoka et al., (2001) Sayama CM2 Chondrite: Fresh but Heavily Altered (abs. #1645). Lunar and Planetary Science Conference XXXII: Houston, Texas. (Mar 2001) |
| ⓘ 'Serpentine Subgroup' Formula: D3[Si2O5](OH)4 Description: Abundant; Commonly pseudomorphic after olivine Reference: Takaoka et al., (2001) Sayama CM2 Chondrite: Fresh but Heavily Altered (abs. #1645). Lunar and Planetary Science Conference XXXII: Houston, Texas. (Mar 2001) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pentlandite | 2.BB.15 | (NixFey)Σ9S8 |
| ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
| Unclassified Minerals, Rocks, etc. | |||
| ⓘ | 'Apatite' | - | Ca5(PO4)3(Cl/F/OH) |
| ⓘ | 'Chlorite Group' | - | |
| ⓘ | 'Fayalite-Forsterite Series' | - | |
| ⓘ | 'Serpentine Subgroup' | - | D3[Si2O5](OH)4 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| H | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| C | Carbon | |
| C | ⓘ Dolomite | CaMg(CO3)2 |
| C | ⓘ Calcite | CaCO3 |
| O | Oxygen | |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| O | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| O | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| F | Fluorine | |
| F | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Mg | Magnesium | |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| Si | Silicon | |
| Si | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| P | Phosphorus | |
| P | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| S | Sulfur | |
| S | ⓘ Pentlandite | (NixFey)Σ9S8 |
| S | ⓘ Pyrrhotite | Fe1-xS |
| Cl | Chlorine | |
| Cl | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Ca | Calcium | |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Ca | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Ca | ⓘ Calcite | CaCO3 |
| Cr | Chromium | |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | ⓘ Pentlandite | (NixFey)Σ9S8 |
| Fe | ⓘ Pyrrhotite | Fe1-xS |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Ni | Nickel | |
| Ni | ⓘ Pentlandite | (NixFey)Σ9S8 |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Grossman, J. N. & Zipfel, J. (2001). The Meteoritical Bulletin, No. 85, 2001 September. Meteoritics & Planetary Science 36 (9), A293-A322. (Sept 2001)
Nakamura, T., Noguchi, T. & Yoneda, S. (2003). The Conditions of Aqueous Alteration Reactions Recorded in the Sayama CM2 Chondrite (abs. #5080). Meteoritics & Planetary Science 38 (7, Supplement), p. A47. (July 2003)
Takaoka et al., (2001) Sayama CM2 Chondrite: Fresh but Heavily Altered (abs. #1645). Lunar and Planetary Science Conference XXXII: Houston, Texas. (Mar 2001).
Hidaka, H. & Yoneda, S. (2013). Radioactive Cs capture in the early solar system. Nature Scientific Reports, Vol. 3, id. 1330 (2013). (Feb 2013)
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