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Hydrogen,
Can I just say that I always read your posts avidly because I think that the knowledge you possess and freely give is first class, but to me your 10.42 post this morning is your best yet, not just for the information you delivered but also for the clarity of writing and expression with which you conveyed it. You make things easy to read and easy to understand which, considering the amount of quality information and insight you provide, is no mean feat.
Wonderful. Thank you.
ATB
The arsenic anomaly is a key point as you and goldworm have pointed out. My guess is there's arsenopyrite in the rocks. I like your reference to the granites and the distance. I think that's a plausible explanation for a potential difference in metal tenor. One other plausibility could be a slightly different granite source at depth but given the proximity of SWAG to Hav i'd say it's likely the same granite source. I made a post in another thread of yours stating different redox chemistry might play a factor. I know for instance pyrite forms more under reducing conditions and Au like you said can become locked up in Pyrite which is where I think alot of the gold is occurring at Havieron. Hence if there's less pyrite at SWAG, that might indicate a more oxidizing fluid which mobilizes copper very well. Less Pyrite would = less gold which could explain why there's a reduced response in the MMI sampling. Just some thoughts
Just for interest, for those wishing to compare, SWAG (2018):
"Highest results returned from MMI sampling were 8ppb silver, 50ppb arsenic, 0.4ppb gold, 480ppb cerium, 2750ppb copper, 280ppb lanthanum and 240ppb lead."
FYI
https://polaris.brighterir.com/public/greatland_gold/news/rns/story/w6ek0gr
"MMI sampling and ground gravity over the Havieron target has been completed at an initial sample and station spacing of 200m x 200m. Additionally ground gravity has been completed over the Scallywag target at a station spacing of 400m x 200m. Results of ground gravity and MMI work at Havieron has outlined several targets for a 2018 drill campaign with the peak gravity response not tested by existing drilling. Gravity confirms a NW structural trend of basement carbonate sediments which is mirrored by the surface MMI response. Clusters of elevated gold, silver, arsenic, copper and iron in MMI results are proximal the peak co-incident gravity and magnetic response. An elevated MMI response in pathfinder elements (cerium, lanthanum, uranium and lead) to the immediate SE of Havieron suggests primary basement mineralisation may be present along strike in a structural contact for up to 1.5 kilometres. Peak MMI responses over Havieron were 4ppb silver, 70ppb arsenic, 25ppb gold, 834ppb cerium, 710ppb copper, 53ppm iron, 284ppb lanthanum, 860ppb lead and 112 ppb uranium. Elevated pathfinder elements detected by the MMI survey support our view that Havieron is an Iron Oxide Copper Gold ("IOCG") system. Gravity results from Scallywag show gravity highs co-incident with the magnetic targets over approximately 2km of strike. Gravity and MMI results have been deemed satisfactory and can be cost effectively deployed to screen the many other prospective regional targets identified by Greatland (as announced 17 Aug 2017)."
Hi Goldworm,
Thanks for your response/opinion, much appreciated.
Guess we will all have to wait for now re SCWAG, ...but I would have liked to have seen the MMI results for Haverion, just out of pure interest (and I cannot find them) simply as a comparison to the most latest reported Haverion drill result/assays etc.
Hi Jiffyy, The analysis of mobile metal ions (MMI) gives an indication of anomalies above background levels for the region. Anomales are seen for gold and copper indicating there is something down there but the relative amounts of gold and copper in the ore body might be different. It depends on how the MMI s were transported to the surface. Arsenic is used as a pathfinder element for gold as the arsenic mineral Arsenopyrite is often found with gold. The anomalous arsenic would therefore indicate to be that there could be significant gold down there as well as copper. As for Palladium and other Platinum group elements, these are usually only found in abundance within layered intrusions where the intrusion is a low silica rock called gabbro. An example is the Merensky Reef in the Bushveld intrusion in South Africa. The Copper-Gold deposits like Havieron are associated hydrothermal fluids that have come from more silica-rich granitic rocks
Bamps, Diamonds. In 1895 at Nullagine, Pilbara, WA, gold prospectors discovered diamonds in alluvial deposits. And in 1998 the Brockman kimberlite dike, circa 60 Kms north of Nullagine, was ‘discovered’ as a primary source rock. If you check the distance between Havieron and Nullagine, it’s not that far in terms of geology.
Will fact check some more tomorrow but now must sleep.
Hi Bamps,
Thanks for your reply.
I would only wish to see Palladium, Gold and Copper in that order :O)
From what I have read so far, the gold if sufficient in quantity, will cover the costs of mining and the remaining copper will essentially be profit, can't see there being any Palldium though, why do you think that?
Hi Jiffy
Gervaise has said the MMI survey at Havieron were remarkably accurate to what they eventually found, considering it's a near surface tool that seems quite remarkable.
It's not guaranteed to be accurate only the drilling can tell us for sure but it does look like copper is dominant but the bonus maybe another Gervaise quote "don't discount the arsenic it comes with its own suite of minerals "
Arsenic is an impurity in the copper concentrate but as an arsenide it can contain PGEs the Platinum Group of Elements such as Platinum,Rhodium, Palladium all rare and high priced commodities
ATB:))
I dug this article out re SWAG from Oct23rd 2018 re MMI sampling.
https://www.mining.com/greatland-finds-copper-silver-gold-australia-projects-scallywag-target/
My question is , will SWAG be more likely to be Copper rather than Gold intensive given the MMI results as below, and if so what do you think this might this have on the current SP, ie, is there any relation between MMI and actual drilling results?
Thanks
Mobile metal ion (MMI) sampling results, completed in the third quarter, showed Scallywag consists of several magnetic anomalies over a large area of approximately 6km by 4km.
'Highest results returned from MMI sampling included 2750 parts per billion (ppb) copper, 8ppb silver, 0.4ppb gold, 50ppb arsenic, 480ppb cerium and 280ppb lanthanum.'
''The grouping patterns of certain elements, as seen in the MMI response over parts of the Scallywag target, are similar to those patterns seen in MMI and drill assays from the Havieron prospect, the company said.''
What were the Haverion MMI results before they drilled Haverion? and do they bear any resemblance to actual drill results?