Sample 10074
10074 Regolith Breccia 55.5 grams
Section titled “10074 Regolith Breccia 55.5 grams”
Figure 1: Photo of 10074,1. NASA S76-20396. Sample is 3.5 cm across.
Introduction
Section titled “Introduction”10074 is a coherent, glass-matrix regolith breccia. Figure 1 show an abundance of lithic clast – mostly mare basalt.
Petrography
Section titled “Petrography”Simon et al. (1984) included breccia 10074 in their comprehensive study of Apollo 11 regolith breccias – their mode is given in the table. They calculated that it had about 26 % highland component, but couldn’t directly identify that many clasts of highland rock. They found 10074 had the least amount of agglutinate component of the Apollo 11 regolith breccias they studied (figure 3).
Simon’s Mode for 10074
Section titled “Simon’s Mode for 10074”| S | L | |
|---|---|---|
| Mare Basalt | 6.2 | 11 |
| Highland Component | 0.9 | 1.8 |
| Regolith breccia | 1.1 | 0.3 |
| Agglutinate | 1.4 | 0.9 |
| Pyroxene | 8.4 | |
| Olivine | 0.2 | |
| Plagioclase | 3.4 | |
| Ilmenite | 1.8 | 0.6 |
| Orange glass | 2 | 0.8 |
| Other glass | 3.5 | 2.2 |
| Matrix | 51 % |
Figure 2: Photomicrograph of matrix of 10074,7. NASA S76-26317.
Chemistry
Section titled “Chemistry”Rhodes and Blanchard (1981) found that the composition of 10074 was similar to that of the other regolith breccias and 10084 (figures 3 and 4).
Processing
Section titled “Processing”Apollo 11 samples were originally described and cataloged in 1969 and “recataloged” by Kramer et al. (1977). There are 6 thin sections.
Figure 3: Comparison of lithic components in Apollo 11 breccias (from Simone et al. 1984).
Table 1. Chemical composition of 10074.
| reference Goles 70 | Rhodes81 | |||
|---|---|---|---|---|
| weight SiO2 % TiO2 Al2O3 FeO MnO MgO CaO | 41.3 7.8 15.3 15.3 0.18 6.8 13 | 41.5 7.49 13.25 15.69 (a) 0.23 7.82 11.91 | (b) (b) (b) (b) (b) (b) (b) | |
| Na2O K2O P2O5 S % sum | 0.5 | (a) 0.48 0.18 0.11 | (b) (b) (b) | |
| Sc ppm V Cr Co | 53.7 78 1770 30.9 | (a) 58 (a) 46 (a) 2070 (a) 31 | (c ) (b) | |
| Ni Cu Zn | 10 | (a) | 162 41 | |
| Ga Ge ppb As | 7 | |||
| Se Rb Sr Y | 3.7 153 102 | |||
| Zr Nb Mo Ru Rh Pd ppb | 500 | (a) 314 19 | ||
| Ag ppb Cd ppb In ppb Sn ppb Sb ppb Te ppb | ||||
| Cs ppm Ba La Ce Pr | 280 13.8 55 | (a) 208 (a) 18.3 (a) 52 | ||
| Nd Sm Eu | 11.5 1.73 | (a) 13.6 (a) 1.68 | ||
| Gd Tb Dy | 2.8 | (a) 2.7 | ||
| Ho Er | 5 | (a) | ||
| Tm Yb Lu Hf | 12 1.7 11.9 | (a) 10.5 (a) 1.58 (a) 10.4 | ||
| Ta W ppb Re ppb Os ppb Ir ppb Pt ppb Au ppb | 1 | (a) 1.4 | ||
| Th ppm U ppm | 0.49 | (a) | 2 | (c ) |
Figure 4: Composition of 10074 compared with Apollo soils.
Figure 5: Normalized rare earth element diagram for breccia 10074 compared with soil 10084 (data from Wiesmann et al. 1975).
technique (a) INAA, (b) XRF, (c ) INAA
References for 10074
Section titled “References for 10074”Goles G., Randle K., Osawa M., Schmitt R.A., Wakita H., Ehmann W.D. and Morgan J.W. (1970) Elemental abundances by instrumental activation analyses in chips from 27 lunar rocks. Proc. Apollo 11 Lunar Sci. Conf. 1165-1176.
King E.A. and a cast of thousands (1969) Lunar Sample Information Catalog, Apollo 11. Lunar Receiving Laboratory, MSC 412 pp
Kramer F.E., Twedell D.B. and Walton W.J.A. (1977) Apollo 11 Lunar Sample Information Catalogue (revised). Curator’s Office, JSC 12522
Rhodes J.M. and Blanchard D.P. (1981) Apollo 11 breccias and soils: Aluminous mare basalts or multi-component mixtures? Proc. 12th Lunar Planet. Sci. Conf. 607-620.
Schmitt H.H., Lofgren G., Swann G.A. and Simmons G. (1970) The Apollo 11 samples: Introduction. Proc. Apollo 11 Lunar Science Conf. 1-54.
Simon S.B., Papike J.J. and Shearer C.K. (1984) Petrology of Apollo 11 regolith breccias. Proc. 15th Lunar Planet. Sci. Conf. in J. Geophys. Res. 89, C109-132.