Ls. Tarasov et al., GEOCHEMISTRY OF TRACE-ELEMENTS IN THE HIGHLAND LUNAR ROCKS BASED ON SRXFA DATA, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 405(2-3), 1998, pp. 590-598
X-ray fluorescence analysis using synchrotron radiation (SRXFA) has be
en applied for determination of trace elements in the highland lunar r
ocks (Luna 20 and Apollo 16). On the basis of the distribution of Rb,
Sr, Y, Zr, and Nb in 69 lunar highland fragments six geochemical group
s of rocks with various aluminium and trace element contents were dist
inguished for each station. They have various levels of trace element
content. This suggests the various petrological processes: cumulation
of rock-forming minerals and partial melting of source rocks. The last
process lead up to enriching in trace elements in rocks formed from t
hese melts. The distribution of trace elements in highland and mare ro
cks of the Moon were compared.