Barramine
Barramine Project (100% Laconia) Gold and Base Metals
The Barramine Project comprises an area of 430km2 covering sequences of Archaean and overlying younger sediments, 245km east southeast of Port Hedland in the East Pilbara region of Western Australia.
The geological position of the project incorporates, and is also along strike from base metal deposits at Barramine, Camel Hump, Ragged Hills and Braeside. The discovery of anomalous copper and zinc in highly altered, pyritic acid volcanics by previous workers provides a prospective geological environment for base metal mineralisation.
Barramine and 701 Mile Projects location map.
Recently acquired geophysical data and interpretation from the Barramine Project has indicated a number of electromagnetic (EM) anomalies. Laconia is targeting volcanic related base metal sulphide horizons within sediments.
These geophysical anomalies have been further evaluated via a preliminary geochemical orientation survey. Sampling has been focused over EM anomalies derived from late time XTEM data. Preliminary data received is presented in the diagram below and provides strong encouragement for base metal mineralisation in this area.
A systematic sampling program was completed in September 2010. A total of 970 samples using various sampling media as defined from the geochemical sampling orientation survey conducted in May. They consist of mag lag samples, stream sediments soil samples and rock chips. Also submitted were 50 rock samples for thin section preparation and petrology. All samples have been submitted for analysis and results are in the process of collation and analysis. These data will be incorporated with the geophysical data we have acquired and the results of recent geological mapping. A number of drilling targets have already been generated from this work.
Barramine EM image and Zinc anomalism
Geological Overview
The Barramine Project is underlain by the Archaean Gregory Range Inlier to the south, and by Permian Paterson Formation fluvioglacial sediments of the Canning Basin to the north. The Gregory Range Inlier constitutes the northeastern most exposure of Archaean rocks in the Hamersley Basin.
Upper Archaean units exposed at the Barramine Project include volcanics and younger epiclastic and chemical sedimentary units of the Jeerinah Formation.
The overlying Hamersley Group is represented by the Carawine Dolomite, which rests on the Jeerinah Formation sediments. The dolomite is well-bedded, crystalline and contains rare stromatolites; it lies within the core of an open north-south trending syncline. Pinjian Chert overlies the dolomite, and comprises bedded chert and locally chert breccia.
Thick Phanerozoic cover (Permian Paterson Formation) covers the north-western portions of the tenements (EL45/3233); two regional exploration drill holes indicate that the Fortescue Group rocks continue beneath the cover.
Barramine Project base metal prospectivity.