The Lou 4 (Branch G6500) occurrence is located in the south eastern head waters of Gray Creek at an elevation of 230 metres, approximately 3.3 kilometres west of Fanny Bay.

The area is underlain by a persistent band, greater than 12 kilometres long, of stratified metavolcanic and metasedimentary rocks of the Upper Triassic Quatsino and Karmutsen formations (Vancouver Group). The band trends northwest and separates Jurassic to Cretaceous Coast Plutonic Complex rock of two different compositions, diorite and granodiorite.

Locally, a sheared and silicified granodiorite and/or diorite hosts chalcopyrite and molybdenite mineralization.

In 1991, a rock sample (91-50-B) assayed 15.2 grams per tonne silver, greater than 1.0 per cent copper and 0.875 per cent molybdenum (Assessment Report 22515).

The area has been historically explored, since the late 1890’s, in conjunction with the nearby Doratha Morton (MINFILE 092K 023) and Alexandria (MINFILE 92K 028) gold mines.

The area was prospected as the Lou 4 claim of the Cordero property in 1991 and 1992 by Ripple Creek Resources. During 1997 through 2000, Thurlow Resources conducted exploration programs on the area, renamed the DM and Picton properties, on the HY, LO and FILL 2-19 claims. The programs consisted of soil sampling, rock sampling, and geological mapping. In 2008, Cuda Capital completed a 561.4 line-kilometre airborne magnetic survey on the area.