The Red South occurrence is located on the northwest flanks of Mount Petritt in the north west corner of West Redonda Island, at an elevation of approximately 650 metres.

The area is underlain by diorites of the Jurassic to Cretaceous Coast Plutonic Complex. Sampling from the southern part of West Redonda Island indicates an age of 111 to 113 million years by potassium-argon from biotite and hornblende (Geological Survey of Canada Open File 480).

Two later stage quartz diorite intrusions underlie most of the area around the showing:, an irregular quartz diorite hornblende porphyry dyke and a quartz diorite porphyry plug. The quartz diorite hornblende porphyry is surrounded by a wide and irregular breccia zone. The breccia zone is composed of quartz diorite fragments in a matrix of quartz diorite hornblende porphyry. Chlorite-biotite alteration is prevalent in the matrix of the breccia zone.

Locally, a biotite-hornblende quartz diorite with breccia zones and chlorite-epidote alteration has been intruded by a hornblende porphyry dike. Mineralization consists of disseminated and fracture- filling chalcopyrite-pyrite and quartz veins hosting molybdenite. Drilling has indicated that the mineralization is concentrated in a north-northwest direction and plunges north (Assessment Report 8085).

In 1979, diamond drilling yielded mineralized intersections (Assessment Report 07346 and 08085):

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Drill hole	From	To	Interval	Copper	Molybdenite	
		(m)	(m)	(m)	(%)	(%)
R79-3		3.4	177.5	174.1	0.20	0.044	
Including	         3.4	125.0	121.6	0.22	0.058
R79-5		2.7	221.3	218.6	0.21	0.020	
Including	         2.7	 55.8	 53.1	0.32	0.025	
Including	        160.0	170.0	 10.0 	0.47	0.005
R79-6		2.5	154.8	152.3	0.11	0.019
Including 	2.5	 30.0	 27.5	0.23	0.059
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In 1965, Mastodon Highland Mines completed a program of soil sampling, geological mapping and a 3.2 line-kilometre ground electromagnetic survey on the area as the Red claims. In 1972, Teck Corp. completed a 2.0 line-kilometre electromagnetic survey and a 4.1 line-kilometre magnetic survey. This was followed up on, in 1977, with a program of pitting and soil sampling. In 1979, a program of 13 diamond drill holes, totalling 2381.2 metres, geological mapping and a 17.0 line-kilometre ground magnetic survey were completed. In 1980, a program of silt and soil sampling was completed. In 2005, a geological air-photo lineament interpretation program was completed. In 2013, the area was prospected by A.I. Betmanis.

The area has been explored in conjunction with the nearby Red (MINFILE 092K 092) occurrence.