Sample Preparation Procedure Metadata
Overburden Drilling Management, Ottawa, Ontario (ODM) / HMC IM grains
Method: HMC IM grains
The 0.25-0.5 mm size fraction was separated by an electromagnetic separator into four categories (strongly, moderately, weakly and non-paramagnetic). This produced a rough sorting of the indicator minerals, and allowed a qualitative assessment of the “input assemblage”. The indicator minerals in the different size fractions (0.25-0.5 mm, 0.5-1.0 mm and 1.0-2.0 mm) were then visually identified using a binocular microscope. Difficult grains were resolved by energy dispersive X-ray spectrometry (EDS), using a scanning electron microscope (SEM). The identified grains were counted and stored in separate vials.
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