Bulletin of the Geological Society of Malaysia, Volume 19, April 1986, pp. 431 – 440
Geological Survey of Malaysia, Bangunan Ukur, Jalan Gurney, Kuala Lumpur 15-01.
Abstract: Available data suggests that in Kelantan primary gold mineralization is associated with argentiferous-auriferous quartz veins, massive sulphide bodies, pyritiferous and carbonaceous metasediments, skarn-type mineralization, and sulphide-bearing volcanic and volcaniclastic rocks. The last two indications are relatively new findings resulting from previous and present drilling activities initiated within the Sok base metal prospect in eastern Kelantan, whereas the presence of geochemically anomalous schist and pyritiferous state is apparent from a recent reconnaissance mapping exercise conducted in central Kelantan. The significance of such auriferous lithologies has added a new dimension to primary gold exploration in Kelantan. Similar pyritised volcanic-sedimentary suites elsewhere will be given due recognition as potential gold targets. Besides, these rocks may be construed as yet another source of detrital gold so common within the streams in Kelantan.
The most significant argentiferous-auriferous massive pyritic lead-zinc sulphide bodies remaining are those at Ulu Sokor. These oxidised bodies show supergene gold enrichment, with the oxidised zones displaying a higher gold tenor than the primary sulphides. Much of the gold in the primary sulphides is locked in pyrite. Results of a recent geochemical and ground geophysical study suggest the likelihood of more extensive mineralization.
Alluvial gold prospecting undertaken recently in Kelantan by local mining companies indicates that the Pulai district and the Sokor drainage basin are the most promising. Based on heavy mineral concentrate evidence, the general area around the defunct tin-tungsten mine at Sungai Yai in western Kelantan also appears to have a favourable gold potential. In general heavy mineral concentrate and stream sediment sampling are cost-effective techniques in identifying auriferous areas.