Ann: Diamond Drilling to Commence at Wodger and Forrest Prospects, page-10

First 10 Last

Share
Profile

Follow
beans

3,844 Posts.

11

26/11/17

18:05

Post #: 29125628
Share

Originally posted by Blythefan ↑

Younging is a way up indicator, so you know if your fold is a syncline or anticline. It is important for knowing the stratigraphic way up if you want to target a footwall position.

Talc schist can be one of two things in a VMS camp. Talc (the mineral) is a magnesium silicate, and you form it from metamorphism of Mg enriched rocks. There's a few ways to do this;
1) Skarns, where you have dolomite (Ca-Mg carbonate) in a marl (dirty limestone) = Mg + Si = Talc
2) Ultramafic rocks with olivine (MgSiO4) or pyroxene + metamorphism = Talc
3) Mafic rocks where you alter them, and remove enough Fe, Al, Na, Ca to drive the composition into being Mg enriched = talc

So, since there's no clear evidence of dolomite, and the Narracoota Volcanics have ultramafic and mafic rocks, the talc schist is either #2 or #3. The chromium and nickel values of the narrcoota will tell you if you have a talc-altered basalt, or a talc metamorphosed ultramafic rock, and AUR will have this from the pXRF analysis it has done.

So, the talc schist could be evidence of VHMS alteration. But I have seen a lot of talc altered basalt which is just low-grade carbonate alteration....and was probably formed in sub-seafloor VHMS zones that just didn't have the legs to make it to an ore deposit.

These things can put you at sea in terms of knowing where to go in exploration. You have the alteration, the geochemical trace elements, etc, but without the DHEM you are borked. So I would say AUR is getting it all sorted out here. But, like I said, sometimes these alteration systems just don't make it to ore deposit size, so....GLTAH.

Expand

Blythefan I disagree with your second last para the strongly sheared talc-carbonate schist are a result of foliation and are good indication that the DHEM could be a VMS. The 100mx75m plate fits in to the VHMS model like Degrussa so lets wait and see if it is a VMS. If Forrest also comes up trumps we may be seeing a Multi Lens VMS camp.

AUR Price at posting: 6.2¢ Sentiment: Buy Disclosure: Held
Upvote

0 Great analysis

Reply

Top Stories

Neurizon sets out to capture the market in neurodegenerative disease therapies

DLM

Biome reaches intellectual property milestone in strain development program

GRL

To make modern missiles, you need 3D Printing. And in that gold rush, Amaero is selling shovels

RSG

HotCopper reacts as Resolute Mining told to pay US$160M if it wants its CEO back

HAW

Yangibana 33% complete says Hastings, as it provides clarification on funding

There are more pages in this discussion • 101 more messages in this thread...

First 10 Last

Add AUR (ASX) to my watchlist

(20min delay)
Last 0.6¢		Change -0.001(14.3%)		Mkt cap ! $2.383M

Open	High	Low	Value	Volume
0.6¢	0.6¢	0.6¢	$14.54K	2.424M

Buyers (Bids)

No.	Vol.	Price($)
3	826354	0.6¢

Sellers (Offers)

Price($)	Vol.	No.
0.7¢	772898	4

View Market Depth

No.	Vol.	Price($)
2	103729	0.030
1	218636	0.028
1	300000	0.024
2	200000	0.022
1	100000	0.020

Price($)	Vol.	No.
0.031	20000	1
0.034	194955	1
0.035	665000	1
0.036	58747	1
0.039	82835	1

Last trade - 13.02pm 14/11/2024 (20 minute delay)

AUR (ASX) Chart

Ann: Diamond Drilling to Commence at Wodger and Forrest Prospects, page-10

Top Stories

Neurizon sets out to capture the market in neurodegenerative disease therapies

Biome reaches intellectual property milestone in strain development program

To make modern missiles, you need 3D Printing. And in that gold rush, Amaero is selling shovels

HotCopper reacts as Resolute Mining told to pay US$160M if it wants its CEO back

Yangibana 33% complete says Hastings, as it provides clarification on funding

Buyers (Bids)

Sellers (Offers)