Geology Reference
In-Depth Information
Fig. 4.11 Illustration of the origin of MVT deposits (From Evans 1993 )
Triassic) ages. MVT deposits of Cretaceous age are found in Algeria and Tunisia
but examples in Precambrian rocks are very rare.
MVT deposits are epigenetic and stratabound and occur in dolostones, or less
commonly in limestone or sandstone, at shallow depths at flanks of sedimentary
basins. A common depositional setting is in platform carbonate sequences, com-
monly reef facies, located either in relatively undeformed foredeeps or in foreland
thrust belts. (Fig. 4.11 ). Most deposits constitute parts of ore “districts” that cover
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