Thanks, I found both examples in Marx's book, Shipwrecks In The Americas. Any more leads would be appreciated.
Year 1628. Another Dutch West India Fleet, commanded by Admiral Piet Heyn, cornered the Nueva Espana Flota, commanded by Captain-General Juan de Benevides y Bazan, near Havana and forced it into Matanzas Bay on September 8, where all twenty-four Spanish ships were wrecked on the shoals. Some of the treasure on the flota ships was thrown overboard before the Dutch fleet entered the bay and the Spaniards fled ashore without firing a shot to protect the treasure or their ships. The Dutch estimate the value of the treasure they took from the ships at 15 million Dutch guilders, and this amount was greater than all that bad been captured from Spanish shipping by privateers and pirates since the discovery of the New World. The treasure was so great that it could not be carried aboard the twenty-eight ships of Piet Heyn, so he refloated four of the largest Spanish ships and used them to carry some of the treasure back to Holland.
Shipwrecks In The Americas, by Robert Marx, Page 348.
Year 1600. Spanish caravel Buen Jesus, 60 tons, Captain Francisco de Ibarra, was approaching the port of Valparaiso when it sighted Dutch warships commanded by Admiral Oliver von Noort. Because the caravel carried no cannon and the Dutch were certain to capture it, the captain ordered her cargo (which consisted of over 125,000 pesos in gold and silver bullion and specie) thrown overboard.
Shipwrecks In The Americas, by Robert Marx, Page 438.