If the answer above is None it means there is no specific mention in the legislation, but you still need to ask local law enforcement before drinking in Chile.
The minimum age is 18 to enter an enclosure that sells alcohol beverages. Selling alcohol to a minor may incur a fine. One must provide identification upon request. Residents of Chile over the age of 18 must carry their Chilean identification card issued by the Civil Registry and Identification Service at all times.
You can find more legal details and links here:
Wikipedia Legal Drinking Page