Rapid influx of fortune seekers to newly discovered precious metal deposits (4,4)

I believe the answer is:

gold rush

(Other definitions for gold rush that I've seen before include "Klondike stampede" , "Movement of people to rich mining area" , "Prospective description" , "Migration of miners" , "California 1849 mania" .)

I've seen this clue in The Irish Times.

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