Timberline Identifies Major New IP Anomalies at the Windfall Target, Eureka Project, Nevada - Seite 2

Interpretation of Geophysical Results

Resistivity data at Windfall reveals consistent patterns that facilitate mapping of rock types, dip attitudes, and structures. The major structures in this area are termed the Windfall Structural Zone (WSZ) and the Windfall East Structural Zone (WEZ), and they are continuous for at least 2.5km along strike. The WSZ is interpreted as dipping steeply to the east and it correlates well with the historic gold mining trend. It separates steeply east-dipping sedimentary units to the west, from moderately east-dipping rocks to the east (Figure 3). Dolomite of the Hamburg Dolomite (Ch) and Eldorado Dolomite (Ce) formations is among the most resistive rocks in the district, and the Prospect Mountain (Cpm) and Eureka Quartzite (Oe) are also highly resistive. This is opposed to the Dunderberg Shale (Cd) and other thinly bedded units, which show up as less resistive.

The WEZ correlates well with the previously mapped Hoosac Fault, which generally has a westward dip, but the WEZ is also sometimes associated with a near-flat lying thrust or detachment structure in the northern part of the district. A number of significant historic gold, silver, and base metal occurrences are aligned with the WEZ and the Hoosac Fault system.

A strong chargeability anomaly occurs parallel to and between the WSZ and the WEZ in an apparent structural trough. The chargeability feature is best developed in the southern part of the survey area, but it has continuity to the north, though tending to narrow on the more northerly lines (Figure 4). This central anomaly is up to 300 metres (m) wide and extends to within 100m of the surface locally within its +3km footprint. A second chargeability anomaly occurs immediately east of the WEZ where Timberline geologists have noted significant hydrothermal alteration in numerous historic prospects. These chargeability anomalies are of a character that is suggestive of unoxidized sulfide minerals at depth.

Another strong chargeability anomaly occurs in the northwest corner of the survey area where little modern exploration has been conducted (Figure 5). The magnitude of the anomaly is very strong and measures up to 400m wide. This chargeable feature is apparently hosted by the Eldorado Dolomite and is interpreted to lie within 230m of the surface. There is another weaker chargeability anomaly in this northwestern area to the west of the WSZ. This anomaly trends to the northeast and can be traced for more than 2km (Figure 2). It is also apparently associated with the Eldorado Dolomite, but it may be linked to an unrecognized fault or fold structure.