The GJ occurrence is located near the southwestern end of the Groat stock at the head of "Groat" Creek on the Klastline plateau. Exposure is poor except where the plateau is cut by deep creek drainages. Mineralization and alteration are similar to the Red-Chris deposit (104H 005) but less extensive.

Conwest Exploration Company Limited discovered the showings early in 1964 and, staked the G.J. group of 196 claims. During 1965, induced polarization and magnetometer surveys were carried out over an area 1825 by 1825 metres.

Amoco Canada Petroleum Company Ltd. optioned the property in 1970 and carried out geological mapping and 1530 metres of diamond drilling in 5 holes on GJ 149 and 151. Drilling yielded intercepts of up to 0.364 per cent copper over 162.15 metres in hole AM-70-02 and 0.497 per cent copper over 64.01 metres in hole AM-70-05 (Mehner, D.T., Giroux, G.H., Peatfield, G.R. (2007-04-30): Technical Report on the GJ Copper-Gold Porphyry Project).

Work during 1971 included geological mapping, a geochemical soil survey, an induced potential survey over 32 kilometres of line, and 2438 metres of diamond drilling in 14 hole on GJ 122, 124, 149, 151, N 18-20, and Red 17, 19 claims. The claims subsequently expired and the ground was restaked in 1975-76 by United Mineral Services Ltd. as the GJ (12 units), Spike 1 and Spike 2 claims (28 units). Norcen Energy Resources Limited optioned the property in 1976. Work during 1976 to 1977 by a wholly owned subsidiary, Great Plains Development Company of Canada, Ltd., included geochemical, magnetometer and induced potential (15.5 kilometres) surveys and trenching (22 metres). The option was given up in 1978. Dimac Resources Corp. purchased the property from United Mineral in 1979.

Canev Resources Inc. of Denver optioned the property in February 1981. Work during the year included 1,780 metres of diamond drilling in 7 holes. The 1981 expenditures earned Canev a 50 per cent working interest in the property. A drill hole (CA-81-07) is reported to have intercepted 181.35 metres grading 0.225 per cent copper, 0.859 gram per tonne gold and 6.26 gram per tonne silver (Mehner, D.T., Giroux, G.H., Peatfield, G.R. (2007-04-30): Technical Report on the GJ Copper-Gold Porphyry Project).

The Canev interest was held in 1982 by Canorex International Inc. Dimac Resources Corp. was placed in receivership in 1983 and the property put up for sale. The Dimac interests were acquired by International Curator Ltd. (formerly Canorex Minerals Ltd. in the early 1980s from the Royal Bank. Ascot Resources Ltd. optioned the GJ property from International Curator in 1989. During 1989 and 1990, Ascot compiled existing data and conducted detailed stream silt sampling (76 samples), overburden drilling (1220.7 metres in 389 holes), contour soil sampling (295 samples), a 20.7-kilometre induced polarization survey, a 19.3-kilometre magnetometer survey and 1644.4 metres of drilling in 9 diamond-drill holes.

In 2000, Curator carried out a very small program that involved taking 18 rock and 61 soil samples from newly staked ground covering the Donnelly and North zone targets when Falconbridge allowed the Texasgulf claims to lapse. This was followed in 2002 with the first of a multi-year, systematic evaluation of the copper-gold porphyry mineralization related to the Groat Stock. This work involved constructing a picket-line grid and carrying out 17.85 kilometres of I.P. and ground magnetic surveys over the Donnelly Zone target.

In 2003, in merging with Royal County, Curator acquired claims covering most of the remaining portions of Klastline Plateau including those immediately east and north of the North and GJ zones. Exploration on its Kinaskan (GJ) property, which includes the GJ (104G 034), Goat (Donnelly) (104G 086) and North (new) showings comprised grid-controlled geochemical and geophysical surveys that helped develop drill targets, and a 1300 line-kilometre airborne high-sensitivity magnetic survey to search for new zones. In 2003, overburden drilling through a widespread till blanket outlined a copper-gold anomaly that extends the Donnelly zone 700 metres beyond previous drilling. In December 2003, Curator underwent a corporate re-organization and changed its name to Canadian Gold Hunter Corp.

In 2004, Canadian Gold Hunter Corp. conducted a 20-hole drilling program (4236 metres divided equally between the North and Donnelly Zones on the Kinaskan (GJ) property. A series of 200-metre step out holes in the Donnelly zone significantly enlarged the known extent of mineralization to an area 1100 meters long by 100 to 300 metres wide. The zone remains open along trend to the east and in width to the north. Canadian Gold Hunter, in concentrating on the Donnelly (Goat) and North zone, appears to have done little work the GJ occurrence over the past few years. A further 17.45 km of I.P. and 24.5 kilometres of ground magnetic survey were completed, additional drilling in the North, GJ East and Donnelly Zone were carried out and detailed silt sampling of drainages emanating from the porphyry zones were conducted, along with rock and soil sampling.

In 2004, the Canadian Gold Hunter (CGH) extended the picket-line grids north of the Donnelly grid and east and south of the North grid. A total of 4236.0 metres of BTW sized core were drilled in 20 holes divided equally between the North and Donnelly Zones (Mehner and Peatfield, 2005).

Early 2005, CGH made the final payment to 650399 BC Ltd. and acquired a full 100 per cent interest in the property. CGH staked four new claims totaling 1471.79 hectares in the southwest portion of the property, as well as merging the GJ, JJ, BJ, LJ, DJ, OJ, Spike #1, Spike #2, T1 to T4 and Sh3 and SH4 into new claims. In 2006, seven additional claims (SJ, TJ, VJ, WJ, XJ, YJ, ZJ) totaling 2595.56 hectares were staked west and northwest of the main area of interest. In March 2007 a single claim (433.202 Ha) was staked to the south.

In 2005, CGH accelerated the program on the property, concentrating largely on diamond drilling. An additional 11.3 line kilometres of I.P. and 34.9 line kilometres of ground magnetometer surveying expanded and filled in previous coverage. Soil sampling surveys were expanded. Thirteen hand trenches totaling 784 linear metres were excavated and sampled. Selected intervals of core from the Amoco, Canorex and Texasgulf programs were re-sampled for comparative assays. A total of 11,730 metres of diamond drilling in 37 holes was completed, mostly in the Donnelly zone. Drilling encountered widespread alteration with disseminated and vein-controlled pyrite with minor chalcopyrite mineralization yielding up to 0.302 per cent copper, 0.765 gram per tonne gold and 1.8 grams per tonne silver over 76.20 metres in hole CGH-05-048 (Mehner, D.T., Giroux, G.H., Peatfield, G.R. (2007-04-30): Technical Report on the GJ Copper-Gold Porphyry Project). Also at this time, a single drill hole (CGH-05-049) located between the GJ and Donnelly (MINIFLE 104G 086) occurrences yielded 0.011 per cent copper, 1.505 grams per tonne gold and 3.7 grams per tonne silver over 6.09 metres (Giroux, G.H., Peatfield, G.R., Cathro, M.S. (2016-02-24): Technical Report on the Donnelly-GJ Deposit Area, GJ Property).

In 2006, CGH continued its exploration of the Donnelly Zone while initiating drill testing of untested anomalies in the Donnelly North, YT, Saddle and North Zones. Work carried out included 32.1 line kilometres of deep penetrating IP and 53.8 line kilometres of ground magnetometer geophysical surveys; further geological mapping and prospecting; and diamond drilling 18,133.16 meters of NQ2 sized core in 62 holes (Assessment Report 29989).

In 2007, CGH focused its exploration work on in-fill drilling of the Donnelly and North Donnelly Zones. In the Donnelly Zone. A total of 4319 metres in 21 holes is reported.

In 2008, Canadian Gold Hunter press release announced a NI 43-101 compliant measured and indicated resource for the Donnelly and North Donnelly of the GJ property. This resource estimate is based on assay results from 169 diamond drill holes over a strike length of 1.6 kilometres. The resource, at cut-off of 0.20 per cent copper, is 153.3 million tonnes grading 0.321 per cent per cent copper and 0.369 grams per tonne gold containing 1.09 billion pounds of copper and 1.82 million ounces of gold. There is an additional inferred resource, at a cut-off of 0.20 per cent copper, of 23 million tonnes grading 0.26 per cent copper and 0.31 grams per tonne gold containing 132 million pounds of copper and 0.23 million ounces of gold (New Release, Oct 7, 2008).

In August of 2010, Teck Resources entered into an Option Agreement with NGEx (formerly Canadian Gold Hunter; CGH), whereby Teck is granted options to earn up to a 75% interest in the 100 per cent NGEx-owned GJ copper-gold property.

Work by Teck in 2010 was focused on further geological mapping concentrated around the Donnelly Zone. In addition historical drill holes were re-logged. Geophysical surveys (ground magnetics and IP) and SWIR spectral studies also formed a large proportion of the work performed during 2010.

In 2011, the Teck operated program consisted of ground magnetics and an induced polarization (I.P.) survey, soil and rock sampling and 4,300 metres of drilling. The geophysics component of the 2011 field season comprised 76.6-line km of I.P. surveys on nine lines, in addition to 50 km of ground magnetic survey. A total of 10 diamond drill holes were drilled, taking note of lithology, mineralization and hydrothermal alteration. 1185 soil samples were also collected. A lone drill hole on the GJ occurrence did not yield any significant results.