The Kuranakh gold deposits found in 1959-1962 are mainly in Lower Cambrian bituminous limestones and dolomites in the Aldan anticline of southern Yakutia. There is considerable similarity between the primary gold occurrences and those disseminated deposits of north-central Nevada (Carlin, Cortez, etc.). The primary occurrences in the Kuranakh district are mainly potash feldspar (adularia) and quartz metasomatites with about 6 ppm gold occurring as irregular replacements of the limestones and dolomites in places in stratiform bodies up to 3 km in length, 300 to 500 m in breadth and 5 to 10 m in thickness. The gold in the adularia zones is very finely divided (2-5 ยต) and mainly in pyrite.
Ref:
*http://www.kanada.net/alluvial/deposits6.html
