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Spruce Ridge Announces Encouraging Preliminary Results from Mineralogical Studies on the Crawford Property
Crawford Nickel - Cobalt Project PUSLINCH, ON / ACCESSWIRE / June 11, 2019 / Spruce Rid...
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[{"type":"text","content":"Spruce Ridge Announces Encouraging Preliminary Results from Mineralogical Studies on the Crawford PropertyCrawford Nickel - Cobalt ProjectPUSLINCH, ON / ACCESSWIRE / June 11, 2019 / Spruce Ridge Resources Ltd. (TSX-V: SHL) - (\"Spruce Ridge\" or the \"Company\") is pleased to announce the results of mineralogical studies on drill core samples from the Company's Crawford project near Timmins, Ontario (see Figure 1). The recent 1,818-metre, 4-hole drill program resulted in wide intersections of up to 558 metres of serpentinized peridotite and dunite with consistent concentrations of nickel, cobalt, palladium and platinum (see news release of March 1st, 2019).Twelve samples of drill core were selected from 1.5-metre analyzed intervals, to cover a range of nickel, cobalt and palladium contents as well as differing degrees of serpentinization and a range of sulphur contents. Polished thin sections were made from the core samples and were examined under reflected-light microscope and a scanning electron microscope (SEM), which provided chemical analyses of individual mineral grains to aid in their identification.The following minerals were identified as carrying most of the nickel and cobalt (in order of decreasing abundance): pentlandite (nickel-iron sulphide), heazlewoodite (nickel sulphide), awaruite (nickel-iron alloy) and minor godlevskite (nickel sulphide with minor iron). The pentlandite, which dominates the sulphide mineral assemblage, typically contains between 3% and 4% of cobalt by weight. Grain size varies from 5 to 100 microns, with most of the cobaltiferous pentlandite being in the coarsest fraction.Also noted in small quantities, were an unknown cobalt-nickel-iron sulphide mineral and an unknown copper-iron-palladium-platinum oxide mineral with the approximate composition 40% Cu, 15% Pd and 1% Pt.In addition to the mineralogical identification, additional analysis was performed on pulps of the 12 core intervals from which the mineralogy samples were taken. The original multi-element analysis was performed by ICP-OES on samples prepared by sodium peroxide fusion, which digests the entire rock to give total concentrations of the analyzed elements. The new analysis was also done by ICP-OES on samples digested in aqua regia, which will dissolve sulphides, oxides and metallic minerals but will not have an effect on silicate ...