Graves (1990) further documented the variety of rock types and noted the high degree of epidotization
, quartz veining, and cataclasis, as well as the presence of mylonitic rocks.
From inside out, this zoning includes a potassic alteration zone, a quartz-sericitization zone, a kaolinization zone, and a porphyritic zone (chloritization, epidotization
, and carbonate alteration assemblages).
The intrusion of quartz veins and alteration (mainly epidotization
) and leaching of sulfides are common in host rocks along these veins.
Wall-rock alteration is intense and consists of silicification, sericitization, chloritization, carbonatization, and kaolin, followed by epidotization