43-101 2008 Technical Report On The La Fortuna Project, Durango ...
43-101 2008 Technical Report On The La Fortuna Project, Durango ...
43-101 2008 Technical Report On The La Fortuna Project, Durango ...
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previous Battle Mountain drilled holes for correlation purposes. Where lithological discrepancies<br />
occur between the Castle Gold DDH and the Battle Mountain RC and/or core hole information,<br />
both the Battle Mountain hardcopy logs and Castle Gold’s core were reviewed and re-logged if<br />
necessary.<br />
<strong>The</strong> verified data from the core logs was then inputted manually or digitally into Microsoft® Excel files.<br />
11.2.2.2 Sampling Quality Assurance and Quality Control<br />
11.2.2.2.1Sampling Quality Assurance by ALS-Chemex - Diamond Drillhole Sample Repeat Assay<br />
As previously mentioned, ALS-Chemex provides gold fire assays with either Atomic Absorption<br />
Spectroscopy (“AAS”) or gravimetric finish. Routine gold assays are by 30 g fire assays and the repeat<br />
analyses have been carried out on pulps stored from the initial analyses. Two repeat assays were carried<br />
out by ALS-Chemex from Castle Gold’s twin diamond drill program (Table 7).<br />
Although only two repeat assay pairs were generated by ALS-Chemex, the original and subsequent gold<br />
assays show acceptable repeatability for gold data (Table 7 and 8).<br />
Table 7. Repeat assays performed internally by ALS-Chemex.<br />
SAMPLE NUMBER<br />
ORIGINAL FIRE ASSAY Au2 ASSAY Au3 ASSAY<br />
(g/t Au)<br />
(g/t Au) (g/t Au)<br />
50303 0.428 0.727 0.571<br />
50305 3.78 3.33 3.08<br />
Arithmetic Average 2.104 2.029 1.826<br />
11.2.2.2.2 Results for Assay Blanks<br />
A total of 27 blank samples consisting of a buff colored brick material were inserted into the twin drill h<br />
ole sample stream during sample collection. <strong>The</strong> blank sample material served as a measure for Castle<br />
Gold and Howe to monitor for possible sample contamination at ALS-Chemex’s sample preparation<br />
facility. Two coarse-grained clay-rich brick samples were submitted to ALS-Chemex for assay in order to<br />
determine if the material was suitable as blank material. Gold values for both samples were below the<br />
detection limit for gold (