The Tacquet Formation in southwestern Mare Serenitatis has unusually low visible albedos for the Al/Si intensity ratios measured by the Apollo 15 X-ray fluorescence experiment. This is a contradiction of the demonstrated good correlation between Al/Si and visible albedo data. To understand why this situation exists, a correlation study has been undertaken. This study is based on Al/Si intensity ratios and includes such other remote sensing data as visible and near IR spectral reflectance, color-difference and color-ratio photography, and broad spectrum visible albedo measurements. The Tacquet unit appears to have: (1) an average Al/Si intensity which is intermediate between mare and highland values (σ=0.21); (2) visible albedos equivalent to the two darkest mare units in the Tranquillitatis-Serenitatis area; (3) a low titanium content; and (4) a relatively high glass-to-crystal ratio. The evidence indicates that the discrepancy between visible albedos and Al/Si intensities in the vicinity of the Tacquet Formation might be due primarily to the addition of highland-type ejecta from the crater, Menelaus, onto a low albedo mare unit. The possibility that the formation consists of dark, high Al material such as spinel, perhaps extruded from the Menelaus Rilles, cannot be excluded, although no such material has been sampled by the lunar missions.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
This is the net price. Taxes to be calculated in checkout.
Adams, J. B. and McCord, T. B.: 1971,Proc. Second Lunar Sci. Conf., pp. 2183–2195.
Adams, J. B. and McCord, T. B.: 1973,Proc. Lunar Sci. Conf., pp. 163–177.
Adler, I., Gerard, J., Trombka, J., Schmadebeck, R., Lowman, P., Blodget, H., Yin, L., Eller, E., and Lamothe, R.: 1972,Proc. Third Lunar Sci. Conf., pp. 2157–2178.
Andre, C. G., Hallam, M. E., Weidner, J. R., Podwysocki, M. H., Philpotts, J. A., Clark, P. E., and Adler, I.: 1975,Proc. Sixth Lunar Sci. Conf., in press.
Carr, M. H.: 1966, U.S. Geol. Survey Misc. Geol. Inv. Map I-489.
Charette, M. P., McCord, T. B., and Pieters, C.: 1974,J. Geophys. Res. 79, 1605–1613.
Clark, P. E., Andre, C., Podwysocki, M., Weidner, J., and Adler, I.: 1975,56th Annual Meeting Am. Geophys. Union, (abs.).
Eller, E.: 1975, personal communication.
Hallam, M., Andre, C. G., Podwysocki, M. H., and Weidner, J. R.: 1975,Lunar Science VI, (abs.).
Johnson, T. V., Matson, D. L., Phillips, R. J., and Saunders, R. S.: 1975,Proc. Sixth Lunar Sci. Conf., in press.
Lucke, R.: 1975, personal communication.
McCord, T. B., Charette, M. P., Johnson, T. V., Lebofsky, L. S., and Pieters, C.: 1972,J. Geophys. Res. 77, 1349–1359.
Podwysocki, M. H., Weidner, J. R., Andre, C. G., Bickel, A. L., and Lum, R. S.: 1974,Proc. Fifth Lunar Sci. Conf., pp. 3017–3024.
Pieters, C.: 1975, personal communication.
Pieters, C., McCord, T. B., Adams, J. B., and Zisk, S. H.: 1973,J. Geophys. Res. 78, 5867–5875.
Pohn, H. A. and Wildey, R. L.: 1970, Geological Survey Professional Paper 599-E.
Pohn, H. A., Wildey, R. L., and Sutton, G. E.: 1970, Geological Survey Professional Paper 599-E.
Reid, A.: 1974,Proc. Fifth Lunar Sci. Conf., pp. 628–629, (abs.).
Whitaker, E. A.: 1972,Moon 4, 348–355.
About this article
Cite this article
Andre, C.G., Hallam, M.E., Weidner, J.R. et al. A correlation study based on Al/Si x-ray fluorescence data from Southwestern part of mare serenitatis. The Moon 15, 133–142 (1976). https://doi.org/10.1007/BF00562477
- Intensity Ratio
- Broad Spectrum
- Correlation Study