Actually the first known inhabitants on the North Slope were the Dorset people who are now extinct. And no. Recent genetic studies have conclusively shown that there was no mixing between the Dorset and any other people who've lived there since. Oh, and the Dorset did not rely on marine mammals to the degree today's residents in the American Arctic do.  Here's an interesting blurb from Wikipedia:      
 "Inuit legends recount them driving away people they called the Tuniit (singular Tuniq) or Sivullirmiut (First Inhabitants). According to legend, the First Inhabitants were "giants", people who were taller and stronger than the Inuit, but who were easily scared off. Scholars now believe the Dorset and the later Thule people were the peoples encountered by the Norse who visited the area.", and "There appears to be no genetic connection between the Dorset and the Thule who replaced them, indicating a lack of intermarriage.".

Readers digest version?  Genocide of the Dorset people.