Jowett Formation
Jowett Volcanic
The Jowett Formation occurs between the overlying Broadview Formation, and the underlying Sharon Creek Formation. This rock is commonly referred to as ‘green rock’ at Thor, and is a mine term for a distinct rock unit that is frequently lime/pistachio green in color due to the presence of chlorite and epidote. The unit is an extrusive volcanic formation that has a basaltic composition, and is prone to alter more readily than the Broadview or Sharon Creek Formations. The Jowett Formation is commonly magnetic owing to the presence of widespread magnetite, and has a connection with the larger magnetic anomaly at Thor that is believed to be related to a concealed porphyry target. |