The Helen D300 area is underlain by rocks of the Lower Jurassic Unuk River Formation (Hazelton Group). Rocks in the area consist of volcanic breccia and andesite tuff, with interbedded siltstone, argillite and conglomerate. The area lies within the Portland Canal dike swarm, which consists generally of granodiorite/quartz diorite dikes.

Rusty weathered, banded intermediate tuff host up to 20 to 35 per cent disseminated to semi-massive pyrite, arsenopyrite, chalcopyrite and trace tetrahedrite and galena. A sample taken in 2005 (sample D300) assayed 0.39 gram per tonne gold and 6.3 grams per tonne silver (Assessment Report 28261). A total of 48 samples were taken in 2005 from various outcroppings and showings on tenure 410699 and 407410. A total of ten 1 meter chip samples were taken from new showings. The Dilworth property was subsequently optioned to Ascot Resources.

See Yellowstone (MINFILE 104B 039) for related information and common work history of the Dilworth property.