carbonan.
/kɑːˈbəʊnə/, U.S. /ˌkɑrˈboʊnə/ English regional (Cornwall). Mining.
A large, irregular mass of tin ore, typically found adjacent to a main lode.
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1843 W. J. Henwood in Trans. Royal Geol. Soc. Cornwall 5 21 The extraordinary deposit of tin ore which is connected with the lode of the Saint Ives Consolidated Mines, and has obtained the name of the Carbona... [Note] This term, as far as I can learn, was first applied to a somewhat similar deposit, which was many years ago discovered in Rosewall-Hill Mine.
1884 J. A. Phillips Treat. Ore Deposits ii. 127 Fig. 44 affords some idea of the way in which these carbonas branch off from the Standard Lode.
1933 Trans. Inst. Mining & Metall. 42 481 Schorl (black tourmaline) is the principal constituent of most of the ‘carbonas’ of Cornwall.
2006 West Briton (Nexis) 9 Mar. 15 The old miners were not afraid to take out huge carbonas of tin and support the remaining ground.
This entry has been updated (OED Third Edition, December 2008; most recently modified version published online December 2021).
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