RE: NO RNS25 Nov 2025 07:19
reasons for delays:
complex sample preparation: different minerals have varying physical properties (e.g., hardness, density), which can make the initial crushing and grinding processes difficult, potentially leading to equipment wear and longer preparation times. achieving a ****genous, fine powder is crucial for accurate results, and complex mineralogy makes this challenging.
need for specialized methods: the presence of various minerals may require the use of specific or multiple analytical techniques to properly identify and quantify all elements, some of which may have longer processing times than routine methods.
interference and matrix effects: an assortment of minerals can create matrix effects or chemical interferences that complicate the analysis.
fire assay: in fire assay (a common method for gold), the presence of certain base metals like nickel can lead to residues in the lead button or slag, requiring adjustments to the flux or reprocessing, which extends the time.
chemical analysis (icp-oes, etc.): for techniques that require sample digestion into a solution, complex mineral matrices might resist dissolution or require a combination of fusion and acid digestion, which is more time-consuming than standard acid-only leaches. high concentrations of interfering elements may also require additional dilution steps or specialized methodologies.
quality control and reruns: unexpected mineral compositions can lead to unusual or biased initial results, necessitating quality control checks, re-runs, or the use of modified analytical protocols to ensure accuracy, all of which extend the overall turnaround time.
variability in mineralization: significant changes in mineralization and rock types across a deposit make it difficult to establish consistent, rapid analytical protocols.
in short: lots of good things going on, possibly🙂
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