The Cassiar Moly East (No.1) occurrence is located at an elevation of approximately 1730 metres on a steep northeast-facing slope, south of Lang (Bass) Creek and approximately 6.3 kilometres west of the south end of Vines Lake.

Regionally, the area is underlain by alkali-feldspar granitic intrusive rocks of the Lower Cretaceous Cassiar Batholith.

Locally, the area is underlain by a quartz monzonite stock, at the eastern margin of the Lower Cretaceous Cassiar Batholith. Intrusive phases include a pink megacrystic porphyry, a coarse-grained porphyry, a grey porphyry and a finer-grained equigranular leucocratic quartz monzonite. All textural variants have gradational contacts. Alaskite, aplite and quartz-feldspar porphyry dikes and segregations occur throughout.

Molybdenite occurs as small rosettes and flakes in the fine-grained intrusions and in fractures and joints with pyrite within quartz-feldspar porphyries and adjoining megacrystic porphyries. Locally, a zone (No.1) of high-grade mineralization occurs in a pegmatite. Other zones of molybdenite mineralization are reported on the northeast-facing slope for approximately 500 metres to the northwest and 500 metres to the southeast.

In 1979, a sample (XI) taken approximately 500 metres to the northwest of the No.1 zone assayed 1.10 per cent molybdenite (Assessment Report 8009).

Work History

The area has been explored in conjunction with the nearby Cassiar Moly (MINFILE 104P 035) deposit and a complete exploration history can be found there.