Mount Marion is located 40 kilometers southwest of the Kalgoorlie mine in Western Australia. It is the world's second largest high-quality spodumene mine in production. The project was put into production in February 2017, with an annual output of about 400,000 tons of lithium concentrate. RESOURCES (2016). Category. Mount Morgan Mine. This mine site and majority of its buildings on site are heritage listed. A dominant feature towering the landscape is a huge brick chimney known as the Big Stack. This was built along with many others to disperse fumes caused from the Copper Production away from the mine. From the Arthur Timms lookout in the township one can.