Intrepid confirms high grades at Casposo (January 17, 2003)

Surface sampling at the Casposo gold-silver project in San Juan province, Argentina, has returned “bonanza” style grades for Intrepid Minerals (IAU-V).

Intrepid, which is currently earning an outright interest in the property from former operator Newmont Mining (NEM-N), took large bedrock samples on grids over the Kamila and Mercado vein systems. The samples, which are to be used for metallurgical testing, returned high gold and silver head grades.

A sample from the Kamila zone’s B vein returned a head grade of 8.1 grams gold and 102 grams silver per tonne, while another on an extension of the B vein returned 7.9 grams gold and 148 grams silver per tonne. A sample over the Inca vein ran 115 grams gold and 569 grams silver, while one over the Aztec vein had 4 grams gold and 129 grams silver per tonne.

On the Mercado zone, a sample taken from a 10-by-20 metre grid ran 4 grams gold and 140 grams silver per tonne.

Cyanide bottle-roll tests of the material gave gold recoveries of 85-94% on material that had been crushed to 80 mesh (0.177 mm) or smaller, rising to 91-96% on material that had been crushed to 150 mesh (0.104 mm). Silver recoveries were 70-94% in the coarser material and 82-99% in the finer. Gravity testing on the sample from the Inca vein (which showed the highest head grades) indicated about 25% of the gold could be recovered in a standard circuit.

Print


 

Republish this article

Be the first to comment on "Intrepid confirms high grades at Casposo (January 17, 2003)"

Leave a comment

Your email address will not be published.


*


By continuing to browse you agree to our use of cookies. To learn more, click more information

Dear user, please be aware that we use cookies to help users navigate our website content and to help us understand how we can improve the user experience. If you have ideas for how we can improve our services, we’d love to hear from you. Click here to email us. By continuing to browse you agree to our use of cookies. Please see our Privacy & Cookie Usage Policy to learn more.

Close