Specific gravity: 6.4
Tenorite is a secondary copper
mineral present to some degree in virtually all
oxidised copper deposits. It is also a volcanic sublimate. Associated minerals include
azurite and cotunnite (volcanic sublimates)
At the Girilambone mine, New South Wales, Australia, tenorite occurs in veins cutting chlorite schist, associated with malachite. Elsewhere at the mine cuprite enclosed by tenorite is associated with malachite and azurite in quartz-hematite gossan (AJM 11.2.98).
At Bisbee, Arizona, USA, tenorite is commonly associated with copper nodules (MinRec 43.1 supplement).
In the oxidized zone chalcopyrite may be oxidised to yield Cu2+, and this may cause the precipitation of copper oxides such as tenorite:
Cu2+ + H2O → CuO (tenorite) + 2H+
The diagram below is a Pourbaix diagram for Cu-Fe-S-H2O (IJNM 07(02).9.23). It shows the relationship between copper Cu, chalcopyrite CuFeS2, tenorite CuO, covellite CuS, cuprite Cu2O, chalcocite Cu2S, pyrite FeS2 and hematite Fe2O3.
Back to Minerals