The Krans 11 occurrence is located between Gladys and Lincoln lakes, about 49 kilometres northeast of the community of Atlin.

The tin occurrence is located within the Surprise Lake batholith (Surprise Lake Plutonic Suite) near its northern margin. The batholith covers about 1100 square kilometres east and northeast of Atlin and is dated at 70.6 plus or minus 3.8 million years (Late Cretaceous). It is composed primarily of medium grained, equigranular alaskite which is essentially a leucocratic granite with microcline and orthoclase with subordinate quartz and may or may not contain plagioclase and mafics; there are some coarse-grained quartz feldspar porphyritic varieties. The contacts between the various textural varieties are commonly gradational. Massive aplitic dikes crosscut the batholith. There are also some very coarse grained pegmatitic zones within the alaskite with large quartz and feldspar crystals and books of biotite. The width of these zones varies considerably, but the contacts are almost always sharp.

Several rusty alteration zones, up to 2 metres wide, occur on cliffs south of a major east-flowing creek. These zones are related to a series of dikes of fine-grained granitic rock from 2 to 5 metres in width. These zones are characterized by abundant chlorite and magnetite, and minor sphalerite, chalcopyrite and quartz veins that carry minor cassiterite. In 1980, one grab sample assayed 0.35 per cent tin (Assessment Report 9342).

The Krans property was staked as a tin prospect following the evaluation of the results obtained from a regional reconnaissance stream sediment sampling program carried out in 1977. Reconnaissance sampling in 1979 yielded several anomalous tin values, some of which were examined in further detail in early 1980. In 1980, CCH Resources Ltd. on behalf of the Cortin Joint Venture, carried out soil, rock and stream sediment sampling on the Krans 11-16 claims. In the course of this work, 143 soil samples, 21 rock samples and 9 pan concentrate samples were taken.