some help to ID these please!!

[dryhorrors]

hi guys
i went to port germein not long ago and on my adventures found some interesting rocks
if you could possibly help me identify them that would be great
this one makes my AT PRO go mental

and this one just looked good

cheers in advance guys
dan

 

[Westaus]

Not knowing the area nor geology specific and not being any expert in geology either, but my 0.02c worth is it looks like pyrite mixed through a sedimentary rock. It looks fine grained, with some smaller pebble size conglomerate. It would appear the pyrite has worked through a fracture or crack in that area ? You have confirmed it is not Gold (Au) pyrite cracks, gold you should be able to stretch, mold a bit etc...

If around the same area the other sample is a mineral and probably something of the calcite group. With some quartz crystals forming through metamorphic activity. These are all good indicators for Gold being in the area. So look around some more and look for some host rocks.

Nice samples, it would be good to use something for size as well, a ruler or a coin something that people can associate with.

So that's my crack, now I will wait for one of the more experienced members to tell me how many bits I got right or wrong :8

 

[dryhorrors]

cheers west, here are a few more pics with tape measure

 

[Digginholes]

The black one looks just like one I found at tuena, still have no idea what it is but

 

[dryhorrors]

no clue diggin but its heavy as hell...

 

[Digginholes]

Yeah and hard as hell too I tried to smack it with the 4pound hammer and it just bounced off lol.. Yours has a lot more gold stuff through it, the one I got also on one side looked kind of melted almost like slag but im certain it's a rock not slag. Maybe some kind of volcanic rock

 

[Cheese]

Looks the same rock.

 

[Digginholes]

Either way mate what ever it is you have a really cool looking specimen there.

 

[Cheese]

pyrites.

 

[Digginholes]

Even as pyrites the host rock is quite interesting, still a great looking piece

 

[dryhorrors]

im stoked with it and it looks a bit like " straya " definately wont be crushing just to find out its pyrite, in my eyes its as good as the gold

 

[SWright]

G'day dryhorrors

Ok the first one looks like chalcopyrite (copper iron pyrite), the second is gypsum, the second and third look like bornite + chalcopyrite. the bornite is also called peacock ore (I will let you figure out which colour that is), then more gypsum and the others are a mixture of chalcopyrite, bornite and pyrite. The Chalcopyrite is the brassier looking golden colour. This is ore from around the flinders ranges brought down for shipping from the port. Don't know where the gypsum came from but that mineral is often associated with some mines or more likely from salt lake at in the deserts.

Araluen

 

[KarlS]

There are gypsum deposits around Coober Pedy.
Karl

 

[headbut]

Yeah and hard as hell too I tried to smack it with the 4pound hammer and it just bounced off lol.. Yours has a lot more gold stuff through it, the one I got also on one side looked kind of melted almost like slag but im certain it's a rock not slag. Maybe some kind of volcanic rock

Hi Digginholes

If you have a similar rock from Tuena . it may well be slag. The causeway at Mt Costigan road is made up of it. Another member had a similar specimen

Cheers Paul