noun
gold vein; vein of gold
Literal geological meaning: a vein or seam of gold in rock. Also used metaphorically for a rich source of wealth.
この山には金脈が走っていると言われている。
It is said that a vein of gold runs through this mountain.
探鉱者たちは新たな金脈を
The prospectors kept searching for a new gold vein.
noun
financial backing; source of funds; money connection
Figurative use: a person or organization that provides money, or a reliable source of funding. Often used in business or political contexts.
彼は選挙のために太い金脈を確保した。
He secured a solid source of funds for the election.
その企業は海外に新たな金脈を見つけた。
The company found a new financial connection overseas.