J. L. Johnson's scientific contributions
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Publication (1)
Recently a technique for deriving the Fe content of the lunar surface
from spectral measurements in the extended visible wavelength range was
developed and applied to images obtained by Clementine cameras [Lucey et
al. (1995) Science 268, 1150.]. In concert with that effort, we have
been re-examining the effects of Ti content on the spectral proper...
Citations
... Ryder (1991) has given a detailed explanation for the crystallization of the lunar magma ocean and interpreted the origin of low-Ti, intermediate-Ti, and high-Ti basalts and their sources. The mare basalts with >5% of TiO 2 formation could have involved in the mixing of early cumulates with late-stage cumulates, which is rich in clinopyroxene and ilmenite (Herbert, 1980;Hess, 1991;Hess and Parmentier, 1995;Lucey et al., 1996;Giguere et al., 2000). In the present work, it is observed that TiO 2 ranges up to 7% indicate the intermediate or medium-high Tibasalts (i.e., 4.5-7.5%) in the Orientale basin (Fig. 8). ...
