Location: |
Lasail and Bayda, Semail Ophiolite. Oman |
Major Minerals: |
Pyrite, chalcopyrite, magnetite, haematite |
Minor Minerals: |
Sphalerite, marcasite |
Trace Minerals: |
Include sphene, bornite, pyrrhotite, carrollite, cubanite, molybdenite, mackinawite, native gold |
Textures: |
Optical zoning of pyrite (related to the cobalt content) is common. Minor amounts of cobaltian pyrite are associated with carrollite in chalcopyrite. Inclusions of mixed pyrrhotite-chalcopyrite and pyrrhotite-chalcopyrite-cubanite occur within euhedral pyrite and are due to the breakdown of iss. Both pyrite and sphalerite are extensively replaced by chalcopyrite, pyrite along its cleavage, and sphalerite along twin planes and grain boundaries |
References: |
Haymon et al., 1984; Ixer et al., 1984, 1986; Haymon and Koski, 1985 |