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...Using Shannon entropy calculation (log2 of 26 letters + 10 digits = 36 possible symbols):
Online alternate reality games (ARGs) frequently use strings like this as keys. "Lambrar" appears in obscure fantasy lexicons as a verb meaning "to wander through ruins." 15519 could be a page/line coordinate in a fictional grimoire.
og = Outcrop Group; 15519 = sample ID; cuo = copper oxide indicator; lambrar = reference to Lambrar, a ghost town near the Chilean-Peruvian border. In this reading, the string is a field tag for a mineral sample containing tenorite (CuO).
