Compositional variation in the Hadley Apennine regionOrbital geochemical data in the Hadley Apennine region are related to typical rock compositions and used in determining the distribution of soils derived from the rock types found in this region. Orbital XRF Mg/Si and Al/Si intensities are the orbital data that are used primarily. These data are corrected for spurious interorbit variation using a modification of a previously developed method. The corrected values are than converted to % MgO and % Al2O3, respectively, from theoretical considerations, and as such are compared with similar concentrations for typical lunar rocks and soils of the Apollo 15 landing site. The relationship of the XRF values to Fe, Ti, and Th concentrations, derived from gamma-ray observations, is also considered. It is established that the orbital geochemistry data for this region are consistent with the presence of a mixture of ANT suite and Fra Mauro basalt components frequently dominated by a KREEP basalt component toward the west and by a mafic pyroclastic component toward the east.
Document ID
19820048187
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Clark, P. E. (California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Hawke, B. R. (Hawaii, University Honolulu, HI, United States)