In a medium bowl, mix 1/3 cup olive oil, 3 TBS orange juice, orange zest, lime juice, salt, red pepper, chili powder and cumin. Add shrimp and marinate 10 minutes.
In a large skillet over high heat, melt butter with remaining tablespoon of olive oil. With a slotted spoon, remove shrimp from marinade (reserve marinade). Add shrimp to skillet. Cook about 4 minutes, until no longer pink and just cooked through. Transfer shrimp to a serving plate.
Add reserved marinade to skillet; add remaining orange juice. Bring to a full boil, boil 1 minute. Drizzle flavored oil over shrimp.
You may use large or medium shrimp instead.
