LAUSR

Introduction: The Monument Bay Project is located within the Stull Lake Greenstone Belt in the Oxford Stull Domain of the Western Superior Province in Manitoba, Canada. The Monument Bay Project is composed of three individual deposits: Twin Lakes Deposit, Mid-East Deposit, and AZ Deposit. At the Monument Bay deposit, gold is intimately associated with sulfide mineralization, particularly pyrite [1]. The growth history of pyrite can preserve changes in auriferous fluid chemistry in its distribution of trace elements across a wide range of temperature conditions. Moreover, sulfide geochemistry can be used as an effective proxy for fluid history as information recorded by different fluid events can be inferred through observation of different generations of pyrite growth [2]. In addition, quantitative Au/Ag ratios can provide complementary information about the composition of gold grains. Understanding associations of other trace elements with gold in sulfides and the composition of gold grains can aid in differentiating mineralizing events with implications for improving exploration and geometallurgy at the Monument Bay deposit.