Hi,This is where I got that from. On re-reading I suspect not...

Hi,

This is where I got that from. On re-reading I suspect not all the gold there is sub-micron but steam geochemistry has been instrumental in locating very fine grain gold deposits missed by tradition panning prospecting. This anomaly is exciting and may indicate something like Pogo or Donnell Creek.

Full article in the link below the extract.

GEOLOGY

The Pogo gold deposit consists of numerous massive auriferous quartz +/- sulphide veins hosted in a sequence of amphibolite-grade, paragneiss and orthogneiss of Proterozoic to mid-Paleozoic age. Mid-Cretaceous age granitic plutons and dikes intrude the gneisses, which in turn, are cut by the veins. The Proterozoic gneiss and Cretaceous granitoid sequence are part of the Yukon-Tanana terrain, a gold belt extending from Fairbanks into the historic gold mining areas of the Yukon Territory.

The age of the gold mineralisation is approximately 104 million years (Cretaceous) and is controlled by a low angle regional shear and high angle fault structures, which are interpreted as the fluid conduits for hydrothermal fluids. The field has undergone regional metamorphism, peaking at 110 million years, resulting in moderate folding and foliation of the metamorphic host rocks. Retrograde metamorphism resulted incooling, which transformed the ductile deformation of the metamorphic fabric to brittle (semi-ductile to brittle) deformation resulting in a low-angle shear across the region. Gold in the quartz veins is characterized as “Pogo Type” mineralization and occurs as inclusions in arsenopyrite, inclusions in quartz, composite intergrowths with Bi-Te+/-S minerals in quartz and invisible Au (<1um) inclusions to solid-solution atomically bounded in loellingite, coupled with “low arsenic” arsenopyrite.

The ultimate source of the hydrothermal fluids responsible for the Pogo deposit remains unknown. Both the “Intrusion Related Gold” and “Orogenic Gold” models have characteristics that support the evolution of the Pogo deposit. However, currently, the IRG model best fits current observations and measurements.

Full article below.

https://www.nsrltd.com/our-assets/pogo/