Rubidium-strontium chronology and chemistry of lunar material.

Abstract

Igneous lunar rocks divide into two chemical types, probably representing two rock units. They form separate close groups on the isochron diagram; no total rock age is valid unless the rocks are cogenetic. Mineral isochrons prove that one type has an age of 3.80 +/-0.11 billion years, equal to the line joining total-rock groups, and the initial ratio of strontium-87 to strontium-86 of both types is close to 0.6994. Soil and breccias chemically resemble a mixture of the two igneous types, with a superimposed variation of mineral components, plus a small transferred component rich in nickel, copper, zinc, and possibly stron-tium-87.

Cite this paper

@article{Compston1970RubidiumstrontiumCA, title={Rubidium-strontium chronology and chemistry of lunar material.}, author={William Compston and P A Arriens and Martin J Vernon and B W Chappell}, journal={Science}, year={1970}, volume={167 3918}, pages={474-6} }