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Stephen H. Richardson and Steven B. Shirey used chemical and isotopic information from diamond inclusions to investigate recycling into ancient lithospheric mantle. A change in inclusion assemblages motivated a proposed connection with subduction and continental collision.^[ref]

The inclusions preserve deep material, but their ages and origin must be related carefully to diamond growth and later transport.

Steven B. Shirey and Stephen H. Richardson examined diamond inclusions as samples of ancient mantle processes. They compared inclusion composition and age information to test changes in the delivery of crustal material to the lithospheric mantle.^[ref]

The proposed link to the Wilson cycle connects microscopic samples with planetary recycling, while requiring a model for how the samples formed and survived.