Gold was first discovered along the surface in 1937 by the historical Lexindin Gold Mines, Ltd. Further exploratory work was now commenced when the company had conducted a minor amount of diamond drilling and surface trenching. No additional work was commenced by the company as the prospect had became abandoned.
Another staking on this property was made in 1981, when the Petromet Complex Resources International had conducted their own exploratory drilling phases. It wasn't till 1985, when the company had made joint venture agreements with Echo Bay Mines, Ltd. Drilling within 1985, had amounted to four deep diamond drill holes that had outlined the deposit to be continuous at a depth of 1,200 feet below the surface. Extensive drilling that was conducted by joint venture agreements had soon indicated an ore-reserve of 3,000,000 tonnes, grading 0.24 ounces of gold (Au) per ton.
Drilling that was done had also provided the much need data towards the geology of the Kim Main Zone prior to these indications. Further examinations and geological mapping had revealed that the Kim Main Gold Zone had consisted of two mineralized massive mafic flows near the base of the mafic metavolcanic sequence. Exploratory work that was conducted to the east of the this deposit had indicated metagreywackes and argilites along the shores and islands of Lex Lake. A number of gold showings had also been encountered within metaturbalites, but had not been further examined at the time.
Much of the volcanic sediment contact is also known to skirt this deposit on the east side where the formation changes. These are rather described as volcanic sediments which are also accompanied by metasediment units that are several hundreds of meters wide on both sides of the mafic volcanics. For the most part it was also stated that the host volcanics were largely associated with amphibole, and Epidote, which indicated late recrystallization owing to thermal metamorphism or altercations.
Some more changes are known to occur within the vicinity of the deposit which indicated mineral, and mineral aggregates that has stretching lineations that plunge consistently steeply to sub-vertically in a plane of sub-vertical foliation, which is some what variable in strike. Pillows within this area are also determined to commonly prolate with circular horizontal sections, and the LS fabric is L greater than S, which means that the vertical strain is fairly large, and the horizontal strain is small. Several outcrops within this area are also known to provide the evidence of northwesterly faulting, such as shear zones, and zone of intense fracturing which is known to be widespread within vicinity of this deposit zone. Some northwest faults are also notice but highly less obvious within the outcroppings. Massive flows are also known to contribute towards the deposition of quartz carbonate veining that are rather intense, and provide the evidence of sulphide mineralization. Most of the quartz within this section are commonly white to smokey, and are known to belong to two generations, the first being the smokey quartz, and the second being a carbonate that crosses out the white quartz, and forms a displacement of a matrix breccia that contains quartz fragments. Much of the host rock and vein material are commonly whispy, with whisps of host rocks extending in between bulbous masses of quartz. The Foliation that within the vicinity of the quartz vein is commonly known to also be whispy, and very irregular. In addition to this, the quartz carbonated veins are also determined to not show distinct trends and are known to be more oriented than that at the Cass Deposit.
Gold Concentrates are rather found in the smokey quartz carbonated veins, and also within the surrounding sulphide host rock. In many cases, silification is known to also contribute towards the deposition of gold concentrates within the mineralized zone. A large increase in silification is also known to occur to the east of this deposit, and was notice in core samples, and within the barren parts of the flows. More so silification is rather extensive within the metasediments which underlie the shore and islands of Lex Lake. These highly silified outcrops of sediments are strongly known to not be associated systemically with the gold content within the Kim Main Zone, In many cases, the gold is known to also be concentrated within massive flows due to them being more competent than the pillows and sediments which border them on the west and east side. Basalt units to metasediment are also known to be a major factor towards the gold concentrates as they act as a restriction towards the dilation, and veining of the massive basalt. This had rather cause the gold concentrates to become apart of a deformation as it had replace the sulphide grains in the process of carrying a large tonnage.
The Northwest trending faults are known to also have extensive rotating blocks that might of had caused a widespread rotation of veins, fractures, and ductile shear zones. One other possible reason for forming these geological structures is due to the tenancy for the strain to rather have a large vertical linear component relative to the horizontal strain. Exploratory procedure had indicated that the Kim Main Zone is also opened to the north but the southern section is unlikely to carry good gold values. However, it was believed that a south extension zone did exist due to another large tonnage of ore that was discovered 2km south of the Kim Main Gold Zone, which was believed t have been the Kim Main South Extension. Upon examinations it was revealed that the Kim Main No.2 zone was not an extension but a separate ore-body like the Gold Crest Showing on the Colomac Dyke.