Im curious as to know if someone may have any idea what this could possibly be.The brown outside looks to be iron oxidization but on the inside it is clearly a greyish silvery color. I trimmed a piece off a smaller object i found and it clearly appears to be some sort of metal. It oxidizes black very quickly, very hard, it weighs 325grams, appears to have melted at some time, as to when I have know idea. I found it in a fossil deposit in the northwest territories Canada
nortwest canada covers billions of miles
need better Photos
the rock in which it was found ? sedimentry ? fossils present ? etc..
but at aglance it looks like Iron pyrites
or similar marcasites or chalcopyrite
often found in shales mudstones its also v brittle and hassulfur smell me its hit / makes sparks too
maracasite breaks down quite quickly to a weird powder pyrite wil rust
could also be heamatite which is red oxidized or grey silver
im sorry im unable to provide better photos but conditions are preventing that right now. As for the location I will say its around 70parrellel. It was not found in any type of rock or fossil. Im quite positive it isnt pyrite as ive seen so many different types and this subject is also way to hard. One other thing i failed to mention, when i broke a small piece off and placed it in fire . It exploded, with no trace left.
Just some passing thoughts...
It does look like metal solidified from a liquid state.
...Perhaps in relation to mining.
But it is a conundrum: how might it have been molten, while it burns explosively when put in a fire!
Thinking of metals that rapidly oxidze black, radium (alarmingly) comes to mind!
Though there is the town called Radium, albeit a long way south in BC...
Magnesium would burn explosively, but it oxidises white not black.
Lithium oxide is also white.
Sodium, potassium, calcium, rubidium ... all no.
Determination of its density would help.
thanks mike and after looking up turbidite in wikipedia a thought came to mind with the metal piece i found within the fossil location. would it be possible that mabey it came from an ocean bed then solidified on contact with the water
Molten metal never issues from the earth (on land or on the sea bed). Fractionation occurs, such that the matieral (solid / lava / gas / mineral solutions) may have a resticted chemistry (and hence mineralogy if solid), but it is never as refined as a single metal (nor mix of metals).
But it was a thought.
Need more basic info:
- the colour of the flame when it burns (explodes)
- specific location (town, grid ref, etc.) to be able to check for both: past mine workings; mapped geology
It explodes In fire ??????????/ what immediatly ?
shit get a giger counte on it have u a UV light ? does it glow ?
just pyrites marcasite has a lot of sulphur and does create sparks ... sooo can explode too ?
Pity its not soft id say platinum
well coming from N west terrotories thers limtless pos .. since NWT is location for some rare earth metals mines etc... platinum gold diamonds emeralds uranium etc...
... or similar I mean poss get it tested ... since 'maybe' worth something .... maybe
any ways up intresting to see if u get result
as for a more accurate location . 68'13'17.30N 133'22'49.46W. A flame color..... I cant remember and id rather not try again lol.And it was approx 30seconds till it exploded. Hardness I have nothing to test. But i will be taking it to whitehorse for an assay I think. Thanks for all your help this has really got me interested in geology and fossil collecting.... i think im hooked haha. I will post results of the assay when I receive
Thanks for the location; got it - near the Dempster Highway, SW of Sitigi Lake, NWT.
I suggest you contact the folks at the Northwest Territories Geoscience Office - http://www.nwtgeoscience.ca/ (there's a contacts page). You can refer them to this discussion.
Some other references:
- A Guide to Mineral Deposits of the Northwest Territories
- NWT mines
Keep us posted!
Can't see a fossil but I think you have found ether a specimen of iron pyrite or marcasite.
We find almost exactly what looks like the same type and sometimes shape as you piece with the suggestion the mineral at sometime flowed into shape.
The specimens we find are on the Holderness coast, East Yorkshire, they are usually found in patches on the beach were things of a similar density settle together along with modern day metal from the rapidly eroding boulder clay cliffs.
I have posted an image of a Cretaceous sponge Laosciadia plana from the Flamborian chalk (found as an erratic on the Holderness) it is about one kilo in weight because of its high pyrite content and has 'pyrite rot'
It was in my collection but I put it outside to keep an eye on it when I saw the decay had taken hold, the resulting 'rust stain' on the limestone boulder was after only one day in the rain.