There is no record of a dinosaur fossil being found on Vega Island in 1986. Vega Island is part of the South Shetland Islands in Antarctica, and while dinosaur fossils have been found in Antarctica, they are generally found in the mainland, not on the islands.

It's possible that there has been confusion with another location or a different date. If you have more information about the fossil, such as the specific type of dinosaur or the name of the researcher who found it, it may be possible to find more information.