American West Metals Limited (ASX: AW1) has announced the results of a high-resolution ground gravity survey that was completed over the Storm Copper project on Somerset Island, Nunavut.
The gravity survey is interpreted to have defined a series of dense features that are spatially associated with the interpreted graben fault architecture and known copper sulphide mineralization at Storm.
These geological features closely adhere to the typical sediment-hosted copper model as seen in the large copper deposits of central and southern Africa and highlight the exceptional exploration potential of the area.
The northern fault gravity anomaly extends over approximately 4.8km, is located to the north of the main fault, and is broken into two main zones. The eastern zone is located directly below the 4100N zone, where ongoing drilling has defined thick and continuous copper mineralization in the near surface over 1km of strike.
The southern fault gravity anomaly is approximately 4km long, lies south of the graben fault, and is bounded by the 3500N, 2750N, and 2200N high-grade copper zones.
Strong gravity anomalies identified below and adjacent to the known near-surface copper mineralization extend for several km and are interpreted to represent dense bodies that are consistent with copper sulphide deposits.
Further, the outer periphery of a large gravity anomaly was intersected by a 2022 drill hole that terminated in 68m of copper-bearing sulphide mineralization, remaining open at depth, from 277m downhole.
A 3D inversion was completed on the gravity data to produce a series of gravity contrast iso-shells, which are designed to highlight the areas with the greatest density contrasts in 3D.
Gravity anomalies are coincident with historical electromagnetic and induced-polarization anomalies indicating both dense and electrically chargeable bodies which are interpreted to be consistent with copper sulphides.
Dave O’Neil, managing director of American West commented “The recent gravity survey over the Storm project area has produced spectacular results. The data supports our geological assumptions and the potential for a large copper system below the near-surface copper mineralization.”
“Importantly, our interpretation of the gravity data is supported by coincident historical geophysical anomalies and the 2022 discovery of copper sulphides in drill hole ST22-10, which is located on the edge of one of the newly identified gravity targets.” Said Mr. O’Neil.
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