Yamashita, Katsuyuki et al. (2010) 53Mn-53Cr Chronometry of CB Chondrite: Evidence for uniform distribution of 53Mn in the early solar system, The Astrophysical Journal, 722, 1-5, doi: 10.1088/0004-637X/723/1/20. < 20200121103959-401002 > pub

Map on Earth or stone. Places and analyses are shown.

  • abstract:

    High-precision Cr isotope ratios for chondrules and metal grain separated from CB chondrite Gujba were determined. The ε54Cr values (εiCr = [(iCr/52Cr)sample/(iCr/52Cr)standard – 1] × 104) for all samples were identical within the analytical uncertainty, with a mean value of +1.29 ± 0.02. Uniform ε54Cr signatures of both chondrules and metal grains imply that the Cr isotope systematics of the meteorite was once completely equilibrated. The ε53Cr values of the chondrules and metal grain, on the other hand, display a strong correlation with the 55Mn/52Cr ratio. The 53Mn/55Mn calculated from the slope of the isochron is (3.18 ± 0.52) × 10–6. This corresponds to absolute ages of 4563.7 ± 1.2 Ma and 4563.5 ± 1.1 Ma using angrites D'Orbigny and LEW 86010, respectively, as time anchors. These ages are consistent with the ages obtained using other short- and long-lived radio nuclides, supporting the uniform distribution of 53Mn in the early solar nebula.

  • doi: 10.1088/0004-637X/723/1/20
  • modified at 10 h ago
Img 7560@ab21308f210cbf59108b211 thumb Gujba A-1-4-1-C3b < 20121227091107-989-746 >pub
  • classification: chondrite:carbonaceous
  • physical-form: aliquot
  • quantity (g): 0.0
  • status: (zero)
  • description: Single fragment extracted from single chondrule CB Chondrite Gujba
  • modified at 2020-04-08
Img 7558@2516e14c4aa9fd26bcdd7f9 thumb Gujba A-1-3-3-C2 < 20121227091052-909-323 >pub
  • classification: chondrite:carbonaceous
  • physical-form: aliquot
  • quantity (g): 0.0
  • status: (zero)
  • description: Single fragment extracted from single chondrule CB Chondrite Gujba
  • modified at 2020-04-08
Gujba A-1-4-1-M1 < 20200121112818-912783 >pub
  • classification: chondrite:carbonaceous
  • physical-form: aliquot
  • quantity (g): 0.0
  • status: (zero)
  • description: Metal grain extracted from single chondrule CB Chondrite Gujba
  • modified at 2020-04-08
Img 7556@5a9876ac4ae684f3aa70a9d thumb Gujba A-1-2-1-C1 < 20121227091041-917-309 >pub
  • classification: chondrite:carbonaceous
  • physical-form: aliquot
  • quantity (g): 0.0
  • status: (zero)
  • description: Single fragment extracted from single chondrule CB Chondrite Gujba
  • modified at 2020-04-08
Img 7557@636d8f65b5dc76d297b59b9 thumb Gujba A-1-3-2-C1 < 20121227091047-338-268 >pub
  • classification: chondrite:carbonaceous
  • physical-form: aliquot
  • quantity (g): 0.0
  • status: (zero)
  • description: Single fragment extracted from single chondrule CB Chondrite Gujba
  • modified at 2020-04-08
Img 7559@b200e4eedd55762f74a35bb thumb Gujba A-1-3-3-C1 < 20121227091100-848-762 >pub
  • classification: chondrite:carbonaceous
  • physical-form: aliquot
  • quantity (g): 0.0
  • status: (zero)
  • description: Single fragment extracted from single chondrule CB Chondrite Gujba
  • modified at 2020-04-08
Gujba thumb Gujba < 20071205074735.en >pub
  • classification: chondrite:carbonaceous
  • physical-form: aliquot
  • status: (unknown)
  • description: A piece of CB Gujba was purchased at http://www.meteoritemarket.com in early 2007, and its original weight is 29.5 g. Price was $885.00.
  • modified at 2016-03-23
Img 1986 thumb Gujba A-1-4-1-C3a and -C4 < 20120710092432-123-060 >pub
  • classification: chondrite:carbonaceous
  • physical-form: aliquot
  • quantity (g): 0.33905
  • description: Single fragment extracted from single chondrule CB Chondrite Gujba
  • modified at 2020-04-08
name box-type global-id
binder of 53Mn-53Cr Chronometry of CB Chondrite: Evidence for uniform distribution of 53Mn in the early solar system pub container 20200121104104-619932
name device size global-id
Gujba A-1-4-1-C3b pub TIMS Thermo-Fisher Triton 6 20200121113221-685281
Gujba A-1-3-3-C2 pub TIMS Thermo-Fisher Triton 6 20200121113220-290846
Gujba A-1-4-1-M1 pub TIMS Thermo-Fisher Triton 6 20200121113221-011010
Gujba A-1-2-1-C1 pub TIMS Thermo-Fisher Triton 6 20200121113220-723401
Gujba A-1-3-2-C1 pub TIMS Thermo-Fisher Triton 6 20200121113220-269456
Gujba A-1-3-3-C1 pub TIMS Thermo-Fisher Triton 6 20200121113220-635677
Gujba A-1-4-1-C3a pub TIMS Thermo-Fisher Triton 6 20200121113221-516813
Gujba A-1-3-3-C2_leachate pub TIMS Thermo-Fisher Triton 4 20200121113222-184567
Gujba A-1-3-3-C2_residue pub TIMS Thermo-Fisher Triton 4 20200121113222-944406
Gujba A-1-2-1-C1_leachate pub TIMS Thermo-Fisher Triton 4 20200121113221-657857
Gujba A-1-2-1-C1_residue pub TIMS Thermo-Fisher Triton 4 20200121113221-342219
Gujba A-1-3-2-C1_leachate pub TIMS Thermo-Fisher Triton 4 20200121113221-429483
Gujba A-1-3-2-C1_residue pub TIMS Thermo-Fisher Triton 4 20200121113222-322552
name spots global-id
caption ID assembly stone
able 1. 55Mn/52Cr Ratios, and ε53Cr and ε54Cr Ratios of Chondrules and Metal Grain Extracted from CB Chondrite Gujba pub 20200121113300-502263 Mn-Cr (Yamashita et al., 2010) 13
manual
  • name
  • Yamashita, Katsuyuki
  • Maruyama, Seiji
  • Yamakawa, Akane
  • Nakamura, Eizo