Presidnt Carter has decided to combine the positions of treasurer of the United States and director of the U.S. Mint and to nominate a black woman, Azie Morton, for both, according to a number of sources.

Morton, 41, was a special assistant to Robert S. Strauss during his term as chairman of the Democratic National Committee from 1972 to 1976.

One knowledgeable source said Srauss, who is now the special U.S. trade negotiator, "recommended her and he frankly pushed very hard for "her" with Hamilton Jordon and other high-level presidential aides.

"Azie Morton is one of his favourite subjects," the source said of Strauss. "He has a great deal of confidence in her and affentions for her."

A number of people who know Morton describe her as an efficient administrator who is well-liked.

Born in Dale, Tex., a small town near Austin, Morton has been a teacher, an administrative assistant on two presidential equal opportunity commissions, and an investigator with the U.S. Equal Employment Opportunity Commission.

She went to the Democratic National Committee before Strauss took over, and he named her the deputy manager for both the 1974 Democratic mid-term conventions in Kansas City, and the 1975 Democratic National Convention in New York City.

She was also an adviser to Strauss, and directed a variety of special projects for him from telethons to voter registration.

If confirmed by the Senate, she will replace Francine Neft, the Republican national committeewoman from New Mexico who was named U.S. treasurer by President Nixon, and Mary T. Brooks, the assistant chairman of the Republican National Committee who was named director of the Mint, also by Nixon.

The Treasurer job is largely ceremonial, and has been held by a woman for the past 28 years. The Treasuer's signature is printed on paper money. Directors of the U.S. Mint have administrative responsibility for that agency, which coins and prints U.S. money.