Rim only half of the glass in salt to complement this sweet-meets-tangy drink.
Fill a coupe and a shaker with ice. Add tequila, juices, and Grand Marnier to shaker. Shake vigorously 30 seconds. Remove ice from coupe. Wet half of rim with tangerine juice; dip in salt. Strain in margarita. Serve, with frozen tangerine wedge.