Where did New Orleans African slaves come from ?

Lately ive been learning about my family history, At the moment im working on my fathers side, So far i have found out that my grandmothers farther was half African descent and half Chitimacha Native American a group in southern Louisiane. Knowing that he was half Chitimacha pretty much is good enough for me, that being said i would like to know what African mix he might have had, I know that most slaves for the La Nouvelle Orleans ( New Orleans ) area came from the Caribbean not directly from West Africa like others did, places such as Haiti. Where did their ancestors come from what part of Africa did they come from. Sense the French imported slaves from the Caribbean and not right from Africa im just curious to weather or not they imported from West Africa either.