Cascadia Minerals Ltd V.CAM

RE: North of 60 Mining News, Sept 9th

[hiker1]

Silverware mentioned the Getchell Mines two days ago and on a post of mine Sept 6th that I have reposted here once again,  I drew attention to the exact same inference.........Looking at it again with the comparison of the Orisis in front of us in the North of 60 news,   you will see why the reference has been made.   

Sept 6th post.as stated below.........

Below is a link that contains a very good description of the mineralogy of Carlin type deposits.  Copy and paste it though and I'm sure it won't open here.

https://wolfweb.unr.edu/homepage/arehart/pubs/ArehartOGR1996.pdf

It states in the above link,  the deposits (Carlin Trend type) commonly exhibit significant structural (faults) and stratagraphic (composition/permeability )  controls.   And also,  there is a significant structual control on the localizations of the ore zones in SHDG(sediment-hosted disseminated gold) deposits consisting of both folds and faults.  The general geometry of the ore zone comprises of a feeder zone,  commonly controlled by a high-angle normal fault zone and an upper strathiform zone.

 

 

So in putting these couple of things together,  thought I would go looking through Barrick's operating mines in Nevada and their mineralogy and resources to try and locate  any similarities and did,  in fact, run into a few thought provoking comparisons.

One is the Turquoise Ridge Mine located in the Potosi mining district,  Nevada.   Est reserves I believe were around 7 mil onces and a 20 year mine life.

"Geology: Regional and detailed syntheses indicate that the known gold deposits within the Getchell trend are Carlin-type, sediment-hosted, replacement deposits containing micron gold. Gold mineralisation is found in a number of different rock types generally at the intersection of a number of high-angle and low-angle fault sets. The low-angle faults and associated folds are the result of Devonian- and Permian-age compressional events and the higher-angle faults and fracture sets formed during Tertiary extension. Mineralisation is both structurally and stratigraphically controlled.  

Gold is associated with arsenic, mercury and, to a lesser extent, antimony, and commonly with pervasive decalcification, silicification and carbonaceous alteration. Gold is micron-scale, generally intergrown with arsenical pyrite which, in turn, is encrusted in barren, diagenetic pyrite.
Late stage realgar and orpiment are commonly associated with high-grade ores."

The Cortez Mine has estimated resources of over 11 million ounces of gold and is situated in the Cortez/Battle Mountain trend in north-central Nevada.  

The Cortez's feature which stands out in the Carlin Trend deposit amongst numerous other attributes, is the mineralzation is sedimentary rock-hosted and consists of micrometre-sized free gold particles that are disseminated throughtout the host rock,  commonly in association with secondary silica,  iron oxides and pyrite and is 75 metres thick.  

As  we're trying to really get a handle here on the significance of a Carlin Trend type deposit,  I think the more we can learn to identify what it implies,  the more we'll grasp our own upcoming NRs.  

In the North of 60 article,  some of the highlights were.........

"Mineralization in the Osiris target area shares many of the characteristics of Carlin-type gold deposits, including similar alteration assemblages and association with the low-temperature arsenic sulphides, realgar and orpiment. Host rocks are two, 150- to 250-meter thick limestone debris flow and turbidite units, referred to as the Osiris and Isis Horizons, which occur within basinal silty mudstones. "