Large migration of prospectors to the Yukon in the 1890s (4,4)

I believe the answer is:

gold rush

(Other definitions for gold rush that I've seen before include "Large migration of people to a new field of precious metal" , "Prospective description" , "Klondike-style scramble?" , "Klondike stampede" , "Movement of people to rich mining area" .)

I've seen this clue in The Irish Times.

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