The East occurrence (and larger Spanish Moly property) is located approximately 75 kilometres northeast of 100 Mile House, British Columbia on Highway 97. The East occurrence is situated approximately 1 kilometre east of the Den showing (MINFILE 092P 220).
The oldest rocks on the property, and which host the mineral occurrences, comprise a mixture of pelitic schist, marble, felsic schist and chert, and dark, fine-grained, pyritic cherty metasedimentary rocks tentatively correlated with the Cambrian to Mississippian Eagle Bay Assemblage of Schiarizza and Preto (1987). These stratified rocks outcrop intermittently through the northern portion of the property. The rocks are typically tightly folded and strike north to northeast with moderate to steep easterly dips, although local variations are noted. The metasedimentary rocks display hornfels up to 1.5 kilometres from the observed plutonic contact. A composite granodiorite-granite pluton outcrops extensively in the southern half of the property where it forms a distinct donut shaped airborne magnetometer anomaly. Coarse-grained biotite granodiorite is intruded by finer-grained two mica granites and leucogranite in the central portion of the pluton and locally along the northern intrusive-metasediment contact (Assessment Report 36166).
The East showing is hosted in the eastern carbonate band on the property, comprising crystalline limestone and marble up to 100 metres wide and traceable for 600 metres along strike, northward of its contact with the biotite granodiorite pluton. Mineralization at the East showing is characterized by molybdenite bearing quartz veinlets cutting several rock types including, recrystallized limestone, marble, skarn, quartz-sericite-pyrite schist, pyritic chert, and possible rhyolite flows
The Spanish Moly property has been prospected, sampled, and mapped intermittently since 1999 by D. Ridley. In 2009, a stream sediment program identified a molybdenum-zinc-cobalt-iron-manganese anomaly draining the central portion of a granodiorite intrusion. In 2012, anomalous arsenic in soil was reported, associated with quartz-sericite-pyrite schist and phyllite (Assessment Report 33464). In 2013, minor molybdenite was reported in quartz-pyrite veinlets cutting biotite-granodiorite (Assessment Report 34678). In 2014, a program was completed to follow up the 2009 multi-element stream sediment anomaly and narrowed down potential source areas (Assessment Report 35537). In 2015, D. Ridley and D. Black discovered the Den (MINFILE 092P 220), Den North (MINFILE 093A 221) and East showings (Assessment Report 36166).
A grab sample of rubbly subcrop (SM15DR19) taken from the East showing returned 164 parts per million molybdenum from a rusty weathered, layered, pyritic chert cut by quartz-molybdenite veinlets. (Assessment Report 36166).