The PINE (Lemon Lake) occurrence is located on the north fork of Gibbons Creek, between Long and Chain lakes, approximately 11.5 kilometres east-northeast of the community of Horsefly.

Copper mineralization is associated with the Triassic-Jurassic monzonitic to dioritic Lemon Lake stock, which occurs within volcanic rocks of the Nicola Group in the central Quesnel belt. The stock has intruded Upper Triassic basalt and overlying Lower Jurassic breccias containing felsic volcanic and plutonic clasts. These latter breccias are partly coeval with, and form an apron about, the felsic stock. Both the volcanic and the intrusive rocks have alkalic to sub-alkalic compositions with shoshonitic affinities.

The volcanic rocks adjacent to the stock and parts of the stock itself have undergone propylitic alteration, characterized by the development of calcite, chlorite and epidote. Zeolite alteration in places may also be of hydrothermal origin. Biotite alteration and secondary potassium feldspar is commonly associated with copper mineralization in syenodiorite and monzonite. Copper mineralization also occurs sparsely in the surrounding volcanics. Weakly anomalous gold values have been determined in propylitized volcanic rocks surrounding the stock. Mineralization consists of chalcopyrite, bornite, malachite, pyrrhotite, magnetite, pyrite and molybdenite.

Results from the 2007 and 2010 mapping indicate that copper and gold mineralization in the western half of the Lemon Lake property occurs exclusively in the Mesozoic Lemon Lake stock, and is associated with moderate to strong potassic alteration. Potassic alteration is pink in colour, and is most commonly pervasive throughout the host rock, and less frequently concentrated in veinlets. Sulphide minerals are also most commonly disseminated throughout the host rock, and less frequently concentrated in structures such as veins or fractures. Anomalous samples are all located within close proximity to the inferred contact between the stock and the volcanic rocks. An area of sub-crop consisting of altered diorite was sampled. The diorite contains up to 5-10 per cent disseminated sulphides (pyrite, chalcopyrite and pyrrhotite) with moderate amounts of malachite locally distributed throughout the outcrop. Alteration consists of moderate potassium feldspar and localized epidote. Outcrops of volcanic rocks are limited to the east side of the property, and include both flow and pyroclastic rocks. Flow rocks consist of pyroxene- and olivine-phyric basalt and plagioclase-phyric andesite. Pyroclastic rocks are predominantly polymictic lapilli tuff, with a pyroxene-phyric, andesitic groundmass. Volcanic breccia, pillow basalts and mafic tuff are common, as are felsic tuffaceous breccias, lithic tuffs, tuffaceous sandstone and siltstone.

In 1967, a drill hole (no. 3) intercepted two, 3-metre wide, mineralized zones yielding 0.33 and 0.43 per cent copper, while a surface sample yielded 0.23 per cent copper over 6 metres (Property File - Mt. Calvery Resources Ltd. [1981-01-01]: Data Compilation - Lemon Lake Cu/Au Prospect).

In 1969, percussion drilling, over an area of approximately 500 by 150 metres, yielded 0.12 per cent copper over 24 metres in hole no.1, 0.12 per cent copper over 36 metres in hole no.2, 0.126 per cent copper over 39 metres in hole no.3, 0.22 per cent copper over 9 metres in hole no.4, 0.22 per cent copper over 6 metres in hole no.12, 0.16 per cent copper over 18 metres and 0.17 per cent copper over 12 metres in hole no.22 (Property File - Mt. Calvery Resources Ltd. [1981-01-01]: Data Compilation - Lemon Lake Cu/Au Prospect).

In 1984, trenching yielded up to 0.25 per cent copper over 21.3 metres; gold was not assayed (Northern Miner, April, 1984).

The most significant result of 1987 drilling was hole 206-4 (Pine prospect), returning 0.11 per cent copper over 6 metres between 48 to 54 metres downhole (Assessment Report 15925) with no values greater than 0.1 per cent copper in the other holes.

In 2005, a chip sample yielded 0.84 gram per tonne gold, 6.2 gram per tonne silver and 1.35 per cent copper (Property File - K. Dawson [2006-01-11]: Letter RE: Examination of Lemon Lake porphyry Cu-Au prospect).

In 2007, A sub-crop sample (07DAP202) of altered diorite yielded 0.18 gram per tonne gold and 0.24 per cent copper (Assessment Report 29454). Lithologies sampled in 2008 exploration program suggest that the Lemon Lake Stock does not extend to the eastern portions of Lemon Lake property.

In 2021, two samples from Trench 7 at the Pine showing recorded the highest copper values of 0.145 per cent and 0.136 per cent, both with 0.091 gram per tonne gold over 1 and 2 metres, respectively.

WORK HISTORY

Since the 1960s, the Lemon Lake area has been explored for gold and copper potential, firstly by Helicon Exploration Ltd. in 1966 with an induced polarization survey adjacent to a small lake, east of Lemon Lake, which defined an area of high chargeability. In 1970, Silver Standard Resources Inc. covered a relatively large area over the Lemon Lake pluton with an IP survey, outlining a broad chargeability irregular anomaly that starts about 500 m north of Lemon Lake and extends northeast for about 1.5 km.

In 1973 Hudson's Bay Oil and Gas (“HBOG”) undertook a soil geochemical survey over part of that area underlain by the Lemon Lake pluton and the samples analyzed for copper, molybdenum, zinc, lead and silver. Eleven 61 metre vertical rotary percussion holes tested the coincident geochemical/chargeability anomaly in 1974, in addition to a magnetic survey over the Lemon Lake pluton.

In 1986 Orbex Minerals Ltd. staked the Lemon Lake area and carried out a multielement soil geochemical survey and defined two areas of gold anomalies in soils; one located to the northeast of Long Lake, adjacent to two small lakes, the second located in volcanic rocks to the north of the Lemon Lake pluton, on the edge of previously defined chargeability anomaly. In 1987, Orbex drilled three holes on the northern soil gold and Silver Standard anomalies and four on the soil gold and Helicon anomalies in the southeast portion of the claims.

In 1988 Geva Resource Company Ltd. completed a program of geological mapping, soil geochemical and induced polarization surveys in the northwestern portion of the soil grid and in the eastern part of the grid. In addition, VLF-EM surveying was carried out. Geological mapping on the property, covered the Lemon Lake pluton that defined four main intrusive phases - gabbro/pyroxenite, diorite, syenodiorite and monzonite.

In 1992, Canim Lake Gold Corp. carried out a soil geochemical survey over an area south of Lemon Lake and Long Lake. Soil samples were analyzed only for copper that reached maximum 448 parts per million Cu and defined two anomalous areas, one south of Long Lake and another southeast of Long Lake. Twelve reverse circulation holes were subsequently drilled in areas of high soil copper values and some holes penetrated thick till or overburden to reach bedrock. The following year Canim Lake Gold Corp. conducted a magnetic survey over the same area that had been previously soil sampled.

Joranex Resources Inc. completed reconnaissance geological mapping in 1994 over the northern part of the Lemon Lake area, mainly north of the Lemon Lake pluton. In 1996, Joranex extended geological map coverage to the south to cover part of the Lemon Lake pluton.

In 2007, the goals of exploration work conducted on behalf of Cedar Mountain Exploration Inc. were to locate the historic Pine showing, historic drill locations, and historic anomalous gold and copper targets. The Pine showing was not located at this time. Areas of historic drill locations were found; however, in all cases the presence of outcrop in these areas is non-existent to scarce.

In 2008, Cedar Mountain Exploration Inc. ran programs of rock, till and stream sampling and the interpretation of 2003 airborne radiometric and magnetic surveys resulting in nine targets for follow-up investigations. A geological mapping program was carried out over the Lemon Lake property in 2010. In 2011, Metalogic Exploration Inc. undertook a ground IP (induced polarization) and magnetic survey over the western part of the Lemon Lake pluton, west of the Pine prospect.

In 2018, Evrim Exploration Canada Corp. conducted a program of prospecting, soil and rock sampling, mapping and IP modelling over the Lemon Lake property. In 2021, Orogen Royalties Inc. (formerly Evrim Exploration) and property option holders conducted a program of geological mapping, rock sampling/hand trenching, airborne magnetic/VLF survey, petrology and evaluation of historical drill results and geochemical and geophysical data compiled from previous programs. This data was applied to define drill targets A (CZ prospect area), B (southwest of CZ prospect) and C (Melon-Pine area) on the Lemon Lake property.

In 2022 and 2023, HQ diamond drill holes were completed by Orogen Royalties in the CZ prospect area (Target A), 1 kilometre northwest of the Pine occurrence and in the Melon prospect area (Target C), 1 kilometre southwest of Pine (Assessment Report 41445).

In September 2025, Prospect Ridge Resources Corp. acquired, from Orogen Royalties Inc., a 100 per cent interest in the 26.46 kilometre² Camelot Project (formerly Lemon Lake property) and commenced a diamond drill program on targets A and B, extending from the CZ prospect area southwestward to the southern tip of Lemon Lake (PR REL Prospect Ridge Resources Dec. 22, 2025). A total of 2,034 metres was drilled in ten holes (CAM25-001 to CAM25-010) from eight drill pads.