Ann: Mangaroon Gold Review and Further Consolidation, page-23

@Eddythedog @dag66
Judging by those rather familiar looking ranges of shallow high grades and depths:

I'd be very interested to know if those thin shallow bonanza grades came from a calcrete layer, hopefully akin to Marmota's Aurora Tank.
If the regolith carbonates and natural bushland are similar, it seems highly likely.

If so... as bizarre as this may sound... perhaps using the same CSIRO leaf sampling technique can help our DRE team too;
* pinpointing the highest grade hotspots, often ranging 100g/t to 220g/t.

* covering a much bigger area, faster, and cheaper
* being able to see much deeper than rock sampling or first pass auger drilling
and finding so many hotspots with this method, that their reporting tables cut-off at grades below 5g/t

I'm unsure if any WA projects have begun trialing that method yet, but it can help to progress exploration, even in wet seasons when drilling is not an option.

So perhaps DRE could be eligible for a funding grant for innovations to help accelerate exploration in more than one way..?

For more info;
Re typical Gold Grades in Calcrete Layers Refer:
1) MEU Ann 29 Sept 2022, re Assays over 200g/t
2) MEU Ann 24 Aug 2022, re their 1st wildcat hole in elephant country hits gold and rare earths

& Re CSIRO Leaf Sampling Technique Refer:
1) New Scientist, 17th August, 2019, Page 12; "Firm uses trees to prospect for gold" by David Hambling.

Quote: "Trees act as pumps, bringing upmineral-containing water fromdeep underground... [depositing around their roots in a calcrete layer]... newtools can detect tiny traces ofminerals [in the leafs/bark]... plasmamass spectrometry uses aplasma at 10,000°C to break asample into atoms for analysis.Gold prospecting usuallyinvolves collecting soil samples.The new approach allowssampling to occur [faster over a much wider area] without anydigging and sees much deeper underground.... It is also a relativelycheap method for a first passacross an area..."

2) The Economist, May 25th 2019, P82 Biogeochemistry Gold Leaf

Quote: "biogeochemical prospecting... mapping mineralconcentrations to reveal subterraneantreasures... best applied to dry regionswhere plants seek out water with deeproots. Some even break down soil to extractmineral nutrients, thus increasing theamount of telltale minerals in their leaves.Gold is the obvious element to look for, butchecking for elements that are associatedwith gold deposits, such as antimony andbismuth, can also be sensible."

3) Adelaide Uni report March 2009; Gold-in-Calcrete, Robert Charles Dart
Hotlink; https://digital.library.adelaide.edu.au/dspace/handle/2440/61507

Sample Screenshot;


but dyor as always
& gltah