Sierra Iron Ore has obtained the analytical sample results from the new scout drill campaign conducted at its El Creston iron property in Mexico. During the phase I exploration program, the company has selected reverse circulation (RC) drilling as it rapidly establishes the geological expansions of the prominent magnetite mineralization for further core drill program.
The company has intersected 0.006 g/t gold, 0.65 g/t silver, 0.042% copper, 57% iron, 0.0179% zinc over 3.05 m in the hole CRC-01, 0.04 g/t gold, 3.58 g/t silver, 0.1496% copper, 33.42% iron, 0.0116% lead and 0.035% zinc over 12.19 m and 1.2 g/t silver, 0.0229% copper, 63.36% iron over 4.57 m in the hole CRC-02. It has also cut 0.31 g/t gold, 8.4 g/t silver, 0.0374% copper, 38.75% iron, 0.004% lead and 0.0452% zinc over 3.05 m in the hole CRC-03, 0.028 g/t gold, 0.5 g/t silver, 0.0033% copper, 57.2% iron, 0.0032% lead and 0.0197% zinc over 1.52 m in the hole CRC-09, and 0.102 g/t gold, 4.6 g/t silver, 0.11% copper, 43.5% iron 0.0042% lead and 0.0168% zinc over 1.52 m in the hole CRC-11 and finally, 0.012 g/t gold, 6.1 g/t silver, 0.253% copper, 0.0152% lead and 0.0778% zinc over 1.52 m in the hole CRC-26.
The company has sent all the RC samples and for a 32-element ICP testing. It has not obtained any considerable values of gold, silver, copper, lead and zinc. The known problem is the complexity in geological boundary identification from RC drill cuttings, which will be reported by the future core drilling.
The El Creston’s iron skarn geology includes mainly metasomatic substitute of calcareous and limestone units in volcaniclastics. The spread of the magnetite bodies seems to be along wide antiform flanks.
Source: http://www.sierrairon.com/