Muttama Project Map
The Muttama Project, extends southwards for 17km from 15km east of Cootamundra, to 5km east of Muttama. Cootamundra is located 110km west of Dalton, and 120km northwest of Canberra. Historic workings on the north end of the tenement are part of the old Cullinga Gold Field, and those at the south end of the tenement are part of the Muttama Gold Field.
There are two main lines of historic workings on the tenement, which are approximately north trending and sub-parallel, 4 km apart.
The western line of workings, the Muttama West Line, are around the north trending thrust faulted contact between the Ordovician Jindalee Group deep marine metasediments, and the Silurian Blowering Formation felsic volcaniclastics to the east. The tenement covers 17km of this structure, which is the same structure associated with Christmas Gift (at the north end) and Booths Reward (at the south end). The nearby Christmas Gift has "recorded production of 37,000oz", and is reported as having a "non-JORC compliant resource estimate of 144,000t at 4.6g/t". Just to the south of Christmas Gift, within Commissioners Gold Ltd’s project area, the most significant old working is the Democrat Mine, but no production records have been located. At the south end of the Muttama West Line are the Muttama Reef workings, which strike north-south, and dip steeply westward. This group of workings, together with the Excelsior and Chance Reefs, and the Booths Reward Gold Mines extend over a length of 11km. Twelve lines of reef had been opened in this southern area by 1882.
The second, eastern line of workings, the Muttama East Line, is on or about the north trending Coolac-Narromine Suture. The structure is the thrust faulted contact between the Silurian volcaniclastics of the Blowering Formation, and an intrusive ophiolite of the Silurian Honeysuckle Beds. On the Muttama East Line, the most significant working is the Collis and Petersons Mine, where rich patches of gold were found in a thin quartz vein.
