The Hi prospect (previously known as the Klappan Rose) lies on a precipitous cliff face approximately 1.5 kilometres north of Ealue Lake and 10 kilometres southeast of the village of Iskut. The prospect is located in the strongly dissected highlands of the Tanzilla Plateau.

A 3-year mapping program (1994-96) headed by C. Ash of the British Columbia Geological Survey led to an updated stratigraphic framework for parts of NTS mapsheets 104G/9 and 16 and 104H/12 and 13, including the area of this occurrence. This new interpretation is published in Fieldwork 1994-1996, and Open File 1997-3.

The Lower Jurassic Hazelton Group underlies much of the area to the northwest of Ealue Lake and consists of andesitic volcanic breccias and conglomerates (Open File 1997-3). These are described as grey-green and maroon feldspar-hornblende porphyritic andesitic to dacitic debris flows and lahars; minor flows; with intervals of green and maroon epiclastic conglomerate and medium to coarse-grained crystal lithic wacke with angular, red mudstone fragments. In this area, this unit is further defined as being epidote-chlorite-calcite altered.

Property reports indicate that the Hi property is underlain by moderately dipping (strike 130 degrees, dip 40 +/- 20 degrees northeast) stratified units consisting dominantly of green, maroon and buff coloured volcanic flows, tuffs and agglomerates of andesitic to rhyolitic composition, with minor volcaniclastic and carbonate sedimentary units. The above units have been intruded by a 10 to 20 metre thick syenite sill which may be related to the monzonite stocks of the Early Jurassic Edon and Rose plutons, mapped on the adjoining MFJ prospect (104H 001), 2.5 kilometres to the west-northwest.

Mineralized shears are developed in andesite to dacite tuffs and limestone above an intruding syenite sill. Shears strike 105 to 180 degrees and are steeply dipping. Selectively pervasive alteration comprising chlorite, epidote, calcite, and silica previously described as "skarn" envelopes the shear zone. In the shears themselves, pervasive alteration of the host rock has left a quartz-sericite-clay matrix. Chalcopyrite, pyrite and pyrrhotite occur as disseminations and bedding replacement(?) in a quartz-calcite gangue with associated specularite, hematite, and malachite. The prospect has been tested by three diamond-drill holes and numerous trenches. The mineralization is generally copper rich and gold-silver poor; a two-metre chip sample from the adit assayed an average of 1.17 per cent copper (Assessment Report 9556).

The area was first explored in 1929 when an adit and several trenches exposed visible copper mineralization. The property was extensively explored by geological, geochemical, and geophysical means from 1970 to 1981. Kylite Ventures conducted a rock sampling program and a magnetometer survey in 1991. In 2005, a helicopter-borne geophysical survey was carried out on behalf of Firesteel Resources Inc. on the Rok property. The survey comprised a new tri-directional magnetic gradiometer system, and a gamma ray spectrometer system. The airborne survey was flown at 200 metre line spacings with a total survey coverage of 611.4 line-kilometres. In late 2009, Brett Resources Inc. staked the North ROK claim group and then in mid-2010 carried out a reconnaissance-style program to test for possible extensions of the ROK-Coyote copper-gold system (104H 001, 12, 24). The program included silt sampling of creek drainages, prospecting and rock sampling of colour anomalies and known copper showings and occurrences and systematic rock chip sampling along elevation contour lines over the Edon stock and across the Plateau occurrence (104H 034).

In 2013, OZ Exploration Pty Ltd carried out an exploration program on the ROK Coyote project area, under a Joint Venture agreement with Firesteel Resources Inc (Assessment Report 35259). OZ drilled 1740 metres in 3 three diamond-drill holes, conducted 26.5 line-kilometres of 3D offset line pole-dipole IP/resistivity surveying and 316 line-kilometres of airborne magnetic and radiometric surveying. Eight MINFILE occurrences were covered by the airborne survey with four of these (MFJ, West, B18 and O.K.) also occurring within the IP/Resistivity survey boundaries. The 8 MINFILE occurrences are: MFJ (104H 001), West (104H 002), South (104H 006), Hi (104H 014), Coyote 3 (104H 024), B18 (104H 032), Silver Standard (104H 045) and O.K. (104H 046). A total of 3500 hectares of geological mapping was also completed. A number of chargeability and resistivity anomalies were discovered, some of which were tested during the 2013 drilling. See MINFILE occurrences MFJ (104H 001), O.K. (104H 046) and B18 (104H 032) for drill results.

In 2017, Colorado Resources entered into a purchase agreement, with Firesteel Resources Ltd. to acquire a 100 per cent interest in the ROK-Coyote copper gold property. The ROK-Coyote property occurs immediately south and east on trend of Colorado’s North ROK property and immediately north and west of Imperial Metals Red Chris property.

On Sept 16 of 2020, Colorado Resources announced that it had changed its name to “QuestEx Gold & Copper Ltd.” effective September 28, 2020.

See MFJ (104H 001) for related information on ROK Coyote property occurrences.