The ARDF record for the Tolovana Mine (LG100) gives the details of the mining and geology of the best known and most productive of the deposits in this site. To summarize (from Freeman, 2008), the Tolovana Mine produced about 5,000 ounces of gold prior to 1942. The mineralization consists of quartz veins and stockworks with varying amounts of arsenopyrite, pyrite, boulangerite, jamesonite, tetrahedrite, and stibnite. The country rocks are Paleozoic volcanic rocks, quartzite, and garnet-biotite schist on the north flank of the Cleary antiform. The middle Cretaceous Dolphin granodiorite pluton outcrops over an area about 2,000 feet long and 1,000 feet wide on the south side of the prospect. Regionally, the deposit is part of a east-northeast-trending mineral belt at least six miles long that is related to a series of parallel, northeast-trending fault zones, spaced about 8,000 feet apart. It is also probably continuous with the mineralization at the adjacent Cleary Hill (Freegold) deposit (LG205) to the north. The mineralization is middle Cretaceous (McCoy and others, 1997).

Although the Dolphin intrusive was drilled from 1994 to 1996 and in 1998, there was little exploration of the quartz veins on the prospect from 1941 to 2004. In 2004, Freegold Ventures Ltd., dug 1,790 feet of trenches and drilled 7 core holes that totaled 3,584 feet. The 2004 drilling indicated that the mineralization is a stockwork deposit. In the eastern part of the prospect it is in metamorphic rocks; in the central and western parts it is in the Dolphin intrusive. In 2007, Freegold contracted an extensive drilling program using rotary-air-blast equipment; 170 holes were drilled, totaling 11,449 feet. Numerous samples had significant gold values. The detailed results of this drilling are available in Freeman (2008).

Chloritization, kaolinitization, silicification and sericitization. Carbonate

Although the Dolphin intrusive was drilled from 1994 to 1996 and in 1998, there was little exploration of the quartz veins on the prospect from 1941 to 2004. In 2004, Freegold Ventures Ltd., dug 1,790 feet of trenches and drilled 7 core holes that totaled 3,584 feet. In 2007, Freegold contracted an extensive drilling program using rotary-air-blast equipment; 170 holes were drilled, totaling 11,449 feet. Numerous samples had significant gold values.

In 2010 a ground based geophysical survey was conducted (Abrams and Giroux, 2013).

In 2011, Freegold completed its first NI-43 101 compliant resource calculation using previous drilling completed in the Dolphin/Tolovana area. Ground-based induced polarization (IP) geophysics and shovel soil sampling was also performed in 2011 (Abrams and Giroux, 2013).

In 2012, the NI-43 101 compliant resource was updated; the zone used in the calculation was deepened and extended to the northeast to include the Clearly Hill area (Abrams and Giroux, 2013).