The Jolly-Molly (Haley) occurrence is located in the northern headwaters of Tanglefoot Creek, south east of Mount Haley.

The area is underlain by dolomitic carbonate rocks of the Middle-Upper Cambrian Jubilee Formation and fine clastic sedimentary rocks of the Cambrian to Ordovician McKay Group. These have been intruded by granodioritic rocks of an un-named Cretaceous intrusive to the north.

Locally, an approximately 3- metre wide fault zone with quartz-calcite veins hosts disseminated to massive pods of sphalerite, galena, chalcopyrite, pyrite, pyrrhotite and molybdenite mineralization. The zone occurs along the contact of hornfelsed sediments and relatively un-altered quartzite, limestone and argillite. A monzonite sill, approximately 60 metres thick, is also reported. The sediments strike approximately east-west, dip 65 degrees to the north and are on the nose of a regional, steeply north- plunging (65 degrees) anticline. Scheelite has been reported from heavy mineral samples in the vicinity of the Jolly-Molly occurrence.

In 1974, chip samples from trench 1 yielded 1.4 per cent copper with 41.0 grams per tonne silver over 55 centimetres (sample H-3), 1.05 per cent copper with 0.014 per cent molybdenum over 60 centimetres (sample H-1), 0.80 per cent copper with 0.003 per cent molybdenum over 85 centimetres (sample H-2) and 1.50 per cent copper, 0.047 per cent molybdenum with 4.8 grams per tonne silver over 95 centimetres (sample H-7; Property File - R. Sheffield [1974-09-06]: Report - Haley #I). A select dump sample from one of the former adits yielded 95.8 grams per tonne silver (Property File - R. Sheffield [1974-09-06]: Report - Haley #I).

In 1975, a grab sample (B-439) of outcrop assayed 0.658 per cent zinc, while other talus samples (B-433 to B-448) yielded up to 23.65 per cent zinc and 0.11 per cent copper (Property File - Aquitaine Co. of Canada Ltd. [1976-02-02]: Report on Southeastern British Columbia Project 1975 for Aquitaine Company of Canada).

In 1979, a sample (710M) from a massive pyrrhotite-chalcopyrite vein assayed 1.31 per cent copper and 0.06 per cent molybdenum, while a dump sample of monzonite hosting disseminated mineralization yielded 0.131 per cent copper, 0.015 per cent molybdenum and 0.01 per cent tungsten (Property File - Esperanza Explorations Ltd. [1980-03-01]: Property Examination Report - The Mt. Haley Prospect).

At least four short adits, of unknown age, are reported in the area. In 1966, the area was explored by Cindy Mines as the Jolly-Molly claims. In 1974, the area was prospected and sampled as the Haley 1 claim. In 1975, Aquitaine Co. of Canada Ltd. completed a program of regional geochemical sampling, geological mapping and prospecting on the area. In 1979, the area was examined by Esperanza Explorations Ltd.