Brockman Mining has announced an initial inferred mineral resource of 109 million mt grading 60.03% iron for the Sirius deposit on its Ophthalmia iron ore project, located about 15 km north of Newman township in Western Australia. Together with recently announced resources for the Coondiner and Kalgan Creek deposits, total direct shipping ore (DSO) mineral resources at the Ophthalmia project now stand at 269 million mt grading 59.16% iron.
The mineral resource estimate for the Sirius deposit was prepared by Golder Associates and is based on the results of broad-spaced exploration drilling and surface mapping and sampling. Forty-six reverse circulation holes and eight diamond core holes totaling 6,182 m have been drilled on the deposit. DSO-grade mineralization was delineated within geological boundaries using a 54% iron lower cut-off grade.
In addition to the three main deposits with currently identified mineral resources, Brockman has identified other prospects in the greater Ophthalmia project area, where occurrences of DSO-grade mineralization have been identified from surface sampling in banded iron formations of the Hamersley Group, including the Boolgeeda and Brockman iron formations. These prospects will require further detailed geological mapping and sampling to generate exploration drilling targets for the near future.