In general, dots on geologic maps indicate some type of hydrothermal alteration. In this case argillic alteration and associated iron staining, most likely from weathering of some type of sulfide mineral. Could be gold bearing if sytem was carrying Au. Could also be Cu or other type of mineralization. Need sample assays to be sure if system is gold bearing. Is it located in a known gold bearing region ? Large porph. copper deposit ?Looks like alteration is associated with the set of NW trending faults. I also think the symbols of lines with hash marks,indicate quartz veins. Good Luck !