Table 6
Parameters for optimised models of the parent body of H chondrites for chondrule-dominated binary granular mixture based on the theories of sintering by Helle et al. (1985; model H) or Rao & Chaklader (1972; models R and Rp).
| Model H | Model R | Model Rp | Model O | |||
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| Quantity | Symbol | Value | Value | Value | Value | Unit |
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| Parameters | ||||||
| Granular radius | G | 150 | 150 | 150 | 0.1 | μm |
| Surface porosity | φ srf | 0.248 | 0.248 | 0.248 | 0.201 | |
| Heat conductivity | K b | 4.0 | 4.0 | 4.0 | 4.1 | W (mK)-1 |
| Surface pressure | p srf | 10 | 10 | 10 | – | Pa |
| 26Al/27Al ratio | 5.1 × 10-5 | 5.1 × 10-5 | 5.1 × 10-5 | 5.1 × 10-5 | ||
| 60Fe/56Fe ratio | 1.0 × 10-8 | 1.0 × 10-8 | 1.0 × 10-8 | 1.43 × 10-8 | ||
| Optimised parent body | ||||||
| Radius | R p | 159.4 | 168.8 | 111.8 | 189.6 | km |
| Formation time | t form | 1.840 | 1.578 | 1.787 | 1.893a | Ma |
| Surface temperature | T srf | 159.0 | 150.3 | 150.1 | 193 | K |
| Max. central temperature | T c | 1276 | 1485 | 1298 | 1239 | K |
| Residual porous layer | 2.09 | 2.35 | 4.88 | 1.40 | km | |
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| Fit quality | χ2/ (N − p) | 0.79 | 1.32 | 2.47 | 0.88b | |
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| Meteorite | type | Burial depth and maximum temperature Tmax | ||||
| kmK | kmK | kmK | kmcKc | |||
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| Guareña | H6 | 38.8 1234 | 23.4 1438 | 29.6 1271 | 42.8 1179 | |
| Estacado | H6 | 40.4 1235 | 22.9 1437 | 32.9 1275 | 42.3 1179 | |
| Kernouvé | H6 | 27.1 1217 | 13.9 1383 | 15.3 1227 | 32.7 1170 | |
| Mt. Browne | H6 | 18.2 1182 | 7.72 1285 | 4.90 1072 | 24.3 1150 | |
| Richardton | H5 | 10.2 1100 | 2.79 1110 | 5.23 1100 | 16.5 1104 | |
| Allegan | H5 | 9.01 1080 | 2.42 1032 | 3.75 887 | 15.3 1092 | |
| Nadiabondi | H5 | 7.56 1051 | 2.49 1050 | 4.72 1050 | 12.4 1056 | |
| Forest Vale | H4 | 1.73 766 | 1.64 751 | 2.87 750 | 4.32 855 | |
| Ste. Marguerite | H4 | 1.69 751 | 1.64 751 | 2.87 750 | 2.27 767 | |
Notes. Model O is the optimised model from Henke et al. (2013).
The value given in Henke et al. (2013) was 2.026 Ma, but this is a typographical error. The correct value is given in this table.
Calculated for a new definition of the distance between data points and temperature evolution curve, see Henke et al. (2015).
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