A gold mine is not a bottomless pit, the gold runs out.

一个金矿不是无限的，黄金采光了。

《柯林斯英汉双解大词典》

Find a path through, tunnel underneath, Or simply stay and turn my mountain into a gold mine. I will not quit.

我会找出一条路走过它：在它下面挖一条隧道，或是停下来把这山变成一个金矿，我不会放弃。

youdao

Mines belonging to AngloGold Ashanti have ceased production for almost a month, while workers at another Gold Fields mine - KDC East - have not yet returned to work but this relates to a local union dispute not wages.

BBC: South Africa Gold Fields workers 'end strike'

He is not going to be meeting those expectations without a developed gold mine.

FORBES: The Cost Of Mining Gold In Alaska Keeps Going Up