The Joh 9 occurrence is located near the southeast corner of the Joh 9 claim, about 4.5 kilometres southeast of the Joh 3 showing (094D 169).

The area is underlain by Upper Triassic Takla Group volcanic rocks. These comprise porphyritic andesite and banded tuff. A porphyritic hornblende monzonite stock of the Early Jurassic Hogem batholith intrudes the volcanics, northeast of Johanson Lake. Recent mapping to the south has redefined the Hogem batholith as part of the Hogem Plutonic Complex (Open File 1992-11). The volcanics are hornfelsed and contain bands of amphibolite within 300 metres of the intrusive contact. Diorite plugs, locally chloritized and carbonatized, commonly average 3 to 4 per cent disseminated pyrite.

Locally, the area is underlain by porphyritic andesite flows and tuffs intruded by monzonite-diorite stocks and granite-granodiorite of the Hogem batholith.

Mineralization consists of disseminated pyrite in a rusty, milky quartz vein. The vein is hosted in a shear zone which trends 64 degrees and dips 80 degrees west.

In 1991, Swannell Mineral Corp carried out an exploration program consisting of rock, stream sediment and heavy mineral sampling surveys, and geological mapping on the DARB property (Assessment Report 21782). Forty-six rock samples, thirty-one silt samples and thirty heavy mineral samples were collected for analysis. Mineralization Joh 9 claim consists of disseminated pyrite in a rusty, milky quartz vein. The vein is hosted in a shear zone which trends 64 degrees and dips 80 degrees west. A chip sample collected from this quartz vein, assayed 1.1 grams per tonne gold and 0.016 per cent copper, across 64 centimetres (Assessment Report 21782).

See Darby (094D 168), Darb (094D 135) and Kliyul (094D 023) for related geological, work history and bibliographic information.