Land Act Article 15

Minerals attached to any land shall not become private property, even if private ownership of the said land has been duly acquired.The minerals referred to in the preceding paragraph shall be limited to those which are specified in the Mining Industry Act.
中文原文 土地法第15條
附著於土地之礦,不因土地所有權之取得而成為私有。
前項所稱之礦,以礦業法所規定之種類為限。

English translation for reference only; the Chinese text prevails. Not legal advice.