A TiO2 abundance map for the northern mariaA map of TiO2 abundance for most of the northern maria is presented. The telescopic data base used is the 0.38/0.56-micron ratio mosaic from Johnson et at. (1977). The titanium content has been estimated using the correlation established by Charette et al. (1974). The combination of observational, processing, and calibration errors indicates that the TiO2 map is accurate to + or - 2% (wt% TiO2) for high TiO2 content (more than 5%) and + or - 1% for low values of TiO2. Analysis of the lunar sample and telescopic data suggests strongly that the spectral parameter mapped is sensitive primarily to TiO2 abundance in the range 3-9% and does not correlate directly with iron content. It is suggested, however, that for the low TiO2 mare regions (less than 2-3% TiO2) there may be a relation between the spectral ratio and iron content and that some of the reddest mare areas in the Imbrium region may have low iron contents as well as low titanium abundances.
Document ID
19780057709
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Johnson, T. V. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Saunders, R. S. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Matson, D. L. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Mosher, J. A. (California Institute of Technology, Jet Propulsion Laboratory, Pasadena Calif., United States)