The WHI 357 occurrence is located about 1.5 kilometres west of the confluence of Zenazie Creek with its lower major tributary, 46 kilometres east-northeast of the community of Atlin.

The showing is located in the middle of the Surprise Lake batholith (Surprise Lake Plutonic Suite) which covers about 1100 square kilometres east and northeast of Atlin. The batholith is dated at 70.6 plus or minus 3.8 million years or 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. There are also some massive aplitic dikes which crosscut the batholith and 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.

The WHI 357 showing consists of a quartz vein hosted in alaskite and is reported to contain wolframite (Assessment Report 2334).

In 1969, Canadian Johns-Mansville Company, Limited conducted a geological reconnaissance and a ground scintillometer survey on the WHI claim block.