The SEM occurrence is located 2.5 kilometres upstream from the mouth of Granite Creek, at the main fork in Granite Creek and is found along a trail.

Very little is known about this showing save its mention in Geological Survey of Canada Papers 41-5 and 42-2. It was originally described as disseminated pyrite in quartzite with low gold and silver assays. These quartzites are part of the Proterozoic Stelkuz Formation of the Ingenika Group and are at upper greenschist grade of metamorphism.

In 2019, American Manganese Inc. conducted a 7.05 line-kilometre magnetometer geophysics survey over the Lonnie Property along with 125 soil samples and 39 rock chip samples. Soil sampling outlined a well-defined zone of elevated cerium, lanthanum, niobium, neodymium, praseodymium and yttrium.