This collection is comprised of the professional papers of Michael J. Drake.  The bulk of the material relates to his career as a researcher and professor in geochemistry, planetary sciences, and meteoritics at the University of Arizona.  The majority of this collection predates 1994 when Dr. Drake became the director of the Lunar Planetary Laboratory and head of the Department of Planetary Sciences.  The largest series is the publications which is divided into four subseries; presentations, articles, books chapters, and general.   Other items in the collection are his personal files, correspondences, proposals and grants, professional services, and a subject file.