Dejean-Jones contributed 12 points and Marshall added 11 as the Runnin' Rebels (9-1) recorded a seventh consecutive victory.
Also contributing in the win were Anthony Bennett and Katin Reinhardt, each of whom put in 10 points.
Miners (3-5) were paced by Julian Washburn with 13 points and eight rebounds.
Also reaching double figures for UTEP was Konner Tucker with 12 points in his first game of the season.
Celebrity Couples of 2014 [PHOTOS]