echarter, since PT, PD, and AU and AG are sequential in atomic number, hence have similar weights as solids, and occur naturally together in nature. At their placer operation, nuggets should be found since it yielded AU in prior operations. If the AU is alluvial, the ancient floods or streams carried it there and dissolved it. I don't know if it's an alluvial placer mine. Fines are pulverized remains of prior mining efforts. If another , independent, lab can assay their concentrated ore and support the findings of Dr. Jordan, those labs are not using fire assay or doing it differently.
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