Mississippi valley-type Deposit
Chemical Process (Solution-Rock interaction) - Ground Surface (Meteoric)
Synonym
Red bed copper deposit
Required Geological Setting
Occurrence
Bedded Pb-Zn deposit replacing carbonate rocks such as limesotne and/or dolomite stone. Deposits are in sedimentary rocks in continents near oil fields. Host rock is subjected only to diagenesis, and not to any volcanic activity nor metamorphism. Sulfide minerals are considered to be deposited from high salinity (more than 15 % NaCl) low temperature (20-25 degree) meteoric water originated from petroleum.
Mineral Assemblages
Galena, Sphalerite, Baryte, Fluorite