NOAA researches were able to date the ship by the the ship's hull having cooper sheathing. There are plenty of artifacts as well such as cannons, muskets, glass bottles and navigational tools.
Further Reading:
-http://www.cnn.com/2012/05/16/world/americas/shipwreck-discovery/index.html?hpt=hp_t2
Further Reading:
-http://www.cnn.com/2012/05/16/world/americas/shipwreck-discovery/index.html?hpt=hp_t2