Related Experiment Video
Updated: Jul 11, 2026

Metal-silicate Partitioning at High Pressure and Temperature: Experimental Methods and a Protocol to Suppress Highly Siderophile Element Inclusions
Published on: June 13, 2015
Excess lead in "rusty rock" 66095 and implications for an early lunar differentiation
Abstract:
Apollo 16 breccia 66095 contains a remarkably high amount of lead (15 parts per million), 85 percent of which is not supported by uranium and thorium in the rock. An acid leach experiment coupled with separate analyses of the whole rock and mineral fractions for uranium, thorium, and lead indicate that the excess lead has a lunar source and was apparently introduced about 4.0 x 10(9) years ago. The data also suggest that a major lunar crustal differentiation occurred about 4.47 x 10(9) years ago.
Related Concept Videos
Conditions on Early Earth
Conditions on Early Earth
Gravity between Spherical Bodies
This assumption can be proved easily by showing that the expression for gravitational potential energy between a hollow sphere of mass (M) and a point mass (m) is the same as it would be for a pair of extended...
Energy of a Satellite in a Circular Orbit
Gravimetry: Inorganic And Organic Precipitating Agents
Diversity of Protists III

