The Pinnacles Project is located within EPM 14185 and is 4 km north of the Kennedy Highway  near the small village of Battle Creek aproximately 6km east of Mt Garnet.

Below is from independent Geologist Les Davis Report included in the Consolidated Tin Mines Limited Prospectus. 

The prospective horizon comprises a north-trending 3.5 km long ridge that is considered to be a roof pendant of limestone, basalt and siltstone sediments surrounded by O’Brien’s Creek Super suite granite (see Figure 1). The limestones, in part, are altered to wrigglite skarn - an informal name of wrigglite was coined to describe the texture of a very distinctive banded rock type.

In 1970 to 1971, Toledo investigated the base-metal content of the Pinnacles ridge with trenching, two percussion holes and nine diamond drill holes.

Channel results from Trench 13 returned 30.4 m of 1.3% zinc. Toledo drill logs with written assay results - contained in the Comalco Limited (“Comalco”) reports - show core assaying to be incomplete. Zinc was strongly anomalous with the best hole result being in diamond hole PD1: - 7.4 m grading 3.7% zinc from 60.7 m to 68.1 m down hole.

Between 1971 and 1977, Comalco explored the Mount Garnet area for fluorite, a material used in the aluminium smelting industry. Fluorite veins containing small tonnage and large volumes of low-grade fluorite bearing greisenised granite were not economic. Comalco believed that skarn zones in the Mount Garnet area might satisfy both the desired grade and bulk tonnes requirements for the company.

Comalco mapped, soil sampled and trenched the ridge of skarn rocks and identified a number of fluorite rich prospects. By early 1974, Comalco had completed 83 trenches and 120 shallow percussion holes (PP4 to PP 123), which were generally of 10 m depth with some deeper. The fluorite occurred in a very finely banded wrigglite skarn consisting of layers of fluorite, magnetite and vesuvianite. Comalco identified 23 individual prospects, five of which contained the reported combined fluorite resource of 653 000 tonnes grading 13.5 % fluorine. Drill sample assaying for the first year of work (up to hole PP69) was for fluorine only. The second year involved fluorine assaying and more systematic tin and copper assaying in the fluorine-rich skarn intersections. Tungsten mineralisation was occasionally noted.

Many tin results were in the 0.1% to 0.3% tin range, with the best in hole PP95:- 3 m grading 2% tin from 23 m. Comalco decreased their widespread Mount Garnet work after 1974, to concentrate on the Wafer Prospect within the Pinnacles Project.

Wafer Prospect 

Comalco completed a ground magnetic survey and demonstrated that the Wafer Prospect has a positive magnetic anomaly interpreted to be caused by magnetite bearing wrigglite skarn. The wrigglite forms a steeply dipping body, parallel to the contact of granite and limestone on the eastern edge of the Pinnacles roof pendant.

Three percussion holes, PP 113, 114 and 115 were drilled. Copper carbonates were recorded and tin and copper assay results were in the 0.1% to 0.3% range. In 1974 and 1975, Comalco followed up with three diamond drill holes (PD 12 to 14). Very encouraging results were returned and diamond holes PD15, 16, 17 and 19 were drilled to test continuity away from earlier holes. Results of all holes are given in Table 4 and some intersection data is shown on the simplified geological plan (see Figure 1).

Table 1. Wafer Prospect – Drilling Results

For holes PD15 to 19, the logging suggests that much more skarn rock is available to sample and assay than appears to have been carried out. The logs record that Hole PD16 contains intervals of chalcopyrite and that PD 19 contains intervals of chalcopyrite and sphalerite, but there is no record of copper or zinc assays for these holes. The assaying for tin in the deeper skarn intersections is minimal.

Comalco reported that the drilling of the Wafer Prospect suggested the wrigglite body to be 700 m long, at least 200 m deep and approximately 5 m wide. This drilling outlines two million tonnes at grades ranging from 0.09% tin to 0.63% tin, but resources were not estimated.

In 1978, Newmont Propriety Limited (“Newmont”) commenced tin exploration in the Herberton -Mount Garnet area and joint ventured properties with Comalco. Newmont drilled further north and south of the Wafer prospect, with the best result in diamond drill DDHW2 (see Table 4) confirming the southern continuation of the mineralisation. DDHW4, in the north, penetrated a sulphide-rich biotite hornfels, but there is no recorded assaying for this hole. Newmont also completed a surface rock chip sampling program within the roof pendant, obtaining results up to 9.8% tin. This sample had identifiable cassiterite.

In the 1990s, an agricultural lime supply business mined limestone rock from the Pinnacles ridge. Several pits to approximate 20 m depth were developed. The MLs for that mining operation have since been surrendered.

Mineralisation Potenial

The eastern edge of the Pinnacles roof sediment pendant has a steeply dipping contact of granite with limestone. The limestone has been altered in a horizon with a true width of between 5 m and 10 m, forming an iron rich rock containing tin, copper, zinc and fluorine.

The Wafer Prospect, is a priority target for further drilling to provide confidence in shape and continuity but also to provide samples for the metallurgical testing of the mineralisation. The tin occurs as cassiterite and other minerals, and further work is required to identify the mineral species.

The Pinnacles Project exploration target is several million tonnes of tin resources. Drill assay results to date are high enough to justify investigation for open pit mining of near surface low-grade mineralisation. At the Wafer Prospect it is known that the limestone, in which mineralised skarn can develop,  continues to at least 200 m depth. CTM propose to  evaluate the resource by systematic drilling.

The Comalco and Newmont work has identified many other tin, and fluorine occurrences within the roof pendant on which no drilling has yet occurred. Drilling is required to extend known mineralised skarn trends. A detailed airborne magnetic survey will be flown to discover and outline more skarn mineralisation which is known to be magnetite rich and occasionally contains pyrrhotite.