Cal. Pub. Res. Code § 3940

A mining partnership exists when two or more persons who own or acquire a mining claim for the purpose of working it and extracting the mineral therefrom actually engage in working the claim. To the extent not inconsistent with this chapter, mining partnerships shall be governed in the same manner as other general partnerships would be governed pursuant to Section 16111 of the Corporations Code, by the Uniform Partnership Act (Chapter 1 (commencing with Section 15001) of Title 2 of the Corporations Code), or the Uniform Partnership Act of 1994 (Chapter 5 (commencing with Section 16100) of Title 2 of the Corporations Code).