motherlode

剑桥词典

geology   specialized
a place that has very large supplies of a mineral or other natural resource
主鑛脈；鑛産和其他自然豐富的地區
The Pacific Northwest has been the motherlode of the nation's aluminum output for 60 years . 太平洋西北60多年來一直是這個國家鋁鑛的主産地。
Cairn Energy recently struck the motherlode of oil fields in India . 卡恩能源最近在印度的油田找到了産油層。

something that supplies a very large amount of a thing, quality , etc. that you want
主産區；主要供應來源
The flight data recorder had documented about 200 pieces of information , a motherlode for crash investigators . 飛行記錄儀存貯了200條信息，是飛行事故調查員的主要信息來源。
With this market , vintage clothes shoppers have hit the motherlode. 有了這個市場，買舊款服裝的人算是找到了好地方。 返回 motherlode