Dr. Irving A. Breger, 62, a research chemist with the U.S. Geological Survey for 28 years before retiring in 1980, died Oct. 13 at Holy Cross Hospital after a heart attack. He lived in Silver Spring.

He was an authority in the field of geochemistry, with much of his work studying the relation between fossil fuels and uranium. He was editor-in-chief of "Organic Geochemistry," a technical publication, at the time of his death. He had been a consultant to the Los Alamos scientific laboratory since 1975.

In addition to his government work, he had been an adjunct professor of chemistry and earth sciences at American University, and a visiting professor of chemistry and geology at the University of Maryland where he helped set up that school's graduate program in organic geochemistry.

Dr. Breger was a fellow of the American Institute of Chemists, and a member of the American Oil Chemists Society, and the International Association of Sedimentologists. He was a past chairman of the Geochemical Society, and helped establish the American Chemical Society's geochemistry division.

He was a native of Boston and earned a degree in chemistry at Worcester Polytechnical Institute. He earned a master's degree in organic chemistry and a doctorate in goechemistry at the Massachusetts Institute of Technology. He worked in private industry and for the War Department before joining the Geological Survey in 1952.

He was a member of B'nai B'rith, the National Association of Retired Persons, and area garden clubs.

Survivors include his wife, Ruth of Silver Spring; a son, Joel of Kensington; a daughter, Iris Wilbur; a sister, Ida Goldberg of Danvers, Mass., and two grandchildren.