Sample 67025
67025 Impact Melt Breccia 16 grams
Section titled “67025 Impact Melt Breccia 16 grams”
Figure 1: Photo of 67025. Cube is 1 cm. S72-40525
Figure 2: Photo of 67025. Cube is 1 cm. S72-40524
Introduction
Section titled “Introduction”67025 was collected from the regolith near 67016 on the rim of North Ray Crater. It is a glass-coated crystalline rock with basaltic melt surrounding xenoliths of plagioclase.
Petrography
Section titled “Petrography”Warner et al. (1973) termed 67025 a basalt, while Ryder and Norman (1980) termed it a basaltic impact melt. Plagioclase laths 100 microns long are surrounded and enclosed by pyroxene (figure 3). Numerous relict xenoliths of plagioclase indicated the precursor was a breccia.
Mineral compositions have not been determined.
Chemistry
Section titled “Chemistry”The sample has high ${\rm Al_2O_3}$ , with high Mg/Fe ratio. Ni is high
Radiogenic age dating
Section titled “Radiogenic age dating”None
Processing
Section titled “Processing”There are two thin sections, both from the same potted butt.
Lunar Sample Compendium C Meyer 2012
Table 1. Chemical composition of 67025
| reference weight SiO2 % TiO2 Al2O3 FeO MnO MgO CaO Na2O K2O P2O5 S % sum | glass Morris87 See87 44.72 (b) | anor. See87 48.11 | (b) | Lindstrom82 | |||
|---|---|---|---|---|---|---|---|
| 0.21 32.33 1.95 | (a) | 1.32 21.2 5.47 0.11 10.86 12.59 0.48 0.11 | (b) (b) (b) (b) (b) (b) (b) | 26.7 3.85 | 27.6 5.39 | (a) (a) | |
| 2.07 18.12 0.46 0.08 | 18.12 0.46 (a) | 7 15.7 0.56 | 6.4 16 0.42 | (a) (a) (a) | |||
| Sc ppm V | 5.58 | (a) | 7.4 | 5.9 | (a) | ||
| Cr Co Ni Cu Zn Ga Ge ppb As Se Rb | 577 42 613 | (a) (a) (a) | 729 9.6 160 | 756 64 1160 | (a) (a) (a) | ||
| Sr Y Zr Nb Mo Ru Rh pd ppb Ag ppb Cd ppb In ppb Sb ppb Te ppb Sb ppb Te ppb Cs ppm Ba La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W ppb Re ppb Pt ppb Au ppb | 170 | 183 | (a) | ||||
| 124 9.1 24.2 | (a) (a) (a) | 225 21.2 58.4 | 120 12.2 32.6 | (a) (a) (a) | |||
| 4.09 1.18 | (a) (a) | 10.3 1.33 | 5.74 1.07 | (a) (a) | |||
| 0.9 | (a) | 2.15 | 1.17 | (a) | |||
| 2.88 0.4 2.82 0.34 | (a) (a) (a) (a) | 6.92 1 7.72 0.98 | 3.9 0.56 4.35 0.61 | (a) (a) (a) (a) | |||
| Th ppm U ppm technique: | 2.35 0.64 (a) INA | (a) (a) A, (b | ) DBA | 3.25 0.87 | 1.91 0.47 | (a) (a) |
References for 67025
Section titled “References for 67025”Butler P. (1972a) Lunar Sample Information Catalog Apollo 16. Lunar Receiving Laboratory. MSC 03210 Curator’s Catalog. pp. 370.
Hunter R.H. and Taylor L.A. (1981) Rust and schreibersite in Apollo 16 highland rocks: Manifestations of volatileelement mobility. Proc. 12th Lunar Planet. Sci. Conf. 253 259.
Lindstrom M.M. and Salpus P.A. (1981) Geochemical studies of rocks from North Ray Crater Apollo 16. Proc. 12th Lunar Planet. Sci. Conf. 305-322.
Lindstrom M.M. and Salpus P.A. (1982) Geochemical studies of feldspathic fragmental breccias and the nature of North Ray Crater Ejecta. Proc. 13th Lunar Planet. Sci. Conf. A671-A683. J. Geophys. Res.
LSPET (1973b) The Apollo 16 lunar samples: Petrographic and chemical description. Science 179, 23-34.
LSPET (1972c) Preliminary examination of lunar samples. In Apollo 16 Preliminary Science Report. NASA SP-315, 7-1—7-58.
Morris R.V., See T.H. and Horz F. (1986) Composition of the Cayley Formation at Apollo 16 as inferred from impact melt splashes. Proc. 17th Lunar Planet. Sci. Conf. in J. Geophys. Res. 90, E21-E42.
Ryder G. and Norman M.D. (1980) Catalog of Apollo 16 rocks (3 vol.). Curator’s Office pub. #52, JSC #16904
See T.H., Horz F. and Morris R.V. (1986) Apollo 16 impactmelt splashes: Petrography and major-element composition. Proc. 17th Lunar Planet. Sci. Conf. in J. Geophys. Res. 91, E3-E20.
Stöffler D., Ostertag R., Reimold W.U., Borchardt R., Malley J. and Rehfeldt A. (1981) Distribution and provenance of lunar highland rock types at North Ray Crater, Apollo 16. Proc. 12th Lunar Planet. Sci. Conf. 185-207.
Stöffler D., Bischoff A., Borchardt R., Burghele A., Deutsch A., Jessberger E.K., Ostertag R., Palme H., Spettel B., Reimold W.U., Wacker K. and Wanke H. (1985) Composition and evolution of the lunar crust in the Descartes highlands. Proc. 15th Lunar Planet. Sci. Conf. in J. Geophys. Res. 90, C449-C506.
Sutton R.L. (1981) Documentation of Apollo 16 samples. In Geology of the Apollo 16 area, central lunar highlands. (Ulrich et al. ) U.S.G.S. Prof. Paper 1048.
Warner J.L., Simonds C.H. and Phinney W.C. (1973b) Apollo 16 rocks: Classification and petrogenetic model. Proc. 4th Lunar Sci. Conf. 481-504.