The GRA3500-B showing, discovered in 2009, is located east of Renfrew Creek, at approximately 650 metres in elevation. The area has been explored in conjunction with the Reko properties (see MINFILE 092C 091 for a completed exploration history).

The area is mapped by Muller (Geological Survey of Canada Open File 821) as primarily diorite of the Mesozoic and/or Paleozoic Westcoast Complex. An east trending band of limestone is also mapped. Volcanics of the Lower Jurassic Bonanza Group occur to the north of the Reko property.

The north part of the Reko property is underlain by grey to white crystalline limestone, and the central and south part is underlain mainly by intrusive breccia. Several bodies of limestone also occur in the central and south part. The primary fragments of the breccia are fine- grained and dark grayish green in colour, resembling andesite, and some contain amygdules. This andesitic rock was successively intruded by mafic-rich and mafic-poor diorite. The breccia grades to massive, mesocratic diorite to the south, and to massive andesite at about the 600 metre level on the west side of the east ridge. A set of long, narrow, fine-grained grey dikes strikes 20 degrees and transects all other rocks. Most limestone bodies have been successively intruded by dikes of andesite and leucodiorite. It is thought that prior to diorite intrusion andesite underlay the limestone and also intruded it.

Locally, altered and weathered magnetite with azurite and malachite staining occur over a 1 square metre area near a contact between marble and diorite.

In 2003 through 2010, Emerald Fields Resources and Pacific Iron Ore Corporation completed various exploration projects in the area as a part of the Pearson project. These included prospecting, diamond drilling, ground and airborne geophysical surveys, geological mapping and geochemical sampling. In 2009, assay results reported up to 0.9690 per cent copper (Sample G988584) from heavily altered magnetite and greater than 50 per cent iron (sample G988574) from fresh magnetite (Assessment Report 31260).