In a shallow dish large enough to hold the salmon, combine the juices salt and pepper. Add the salmon, turning to coat with the marinade. Let marinate at room temperature for 20 minutes, turning the fillets once.
Preheat the oven to 425°. Line a shallow baking pan with aluminum foil and grease with a little of the melted butter. In a small dish, combine the orange zest, brown sugar, chili powder and minced garlic.
Rub the marinated salmon with the brown sugar mixture. Place in the pan and drizzle with the remaining melted butter. Bake for 8 to 12 minutes.