Post by: Iwonda on 26/11/2019 06:59:21
How much heat and pressure would it take to fuse a mineral like quartz with about 7 different metal elements and what force on earth could have done this?????
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Post by: chiralSPO on 26/11/2019 13:41:18
I don't think they indicate that the rock is metallic though... To me it looks like aluminosilicate rock, with iron, titanium, and some calcium. Presumably these are all oxides, silicates or aluminates--the photographs don't appear to show actual metallic deposits--it all looks like compounds to me.
Corundum (aluminum oxide) is particularly hard, and could be responsible for damaging your files (not harder than diamond, but probably harder than whatever matrix the diamond is imbedded in).
@Bass might be able to provide more useful insight!
Post by: Bass on 26/11/2019 18:13:51
Metallic minerals are commonly precipitated in veins. The metals are carried in superheated hot water solutions (hydrothermal) and can precipitate when pressures decrease enough to cause the water to flash to steam, or upon mixing with colder groundwaters. Most rocks contain Alumino-silicate minerals (AlSiO), so those elements are commonly the most abundant- which I think is reflected in you spectral analysis.
Post by: Iwonda on 30/11/2019 04:12:39
Below are a couple of photos of stones with metal in them and there are many more.
With this stone I was curious as to how much heat and pressure would it take to fuse together quartz and metal. [ Invalid Attachment ] [ Invalid Attachment ] [ Invalid Attachment ] [ Invalid Attachment ]
Post by: RD on 30/11/2019 07:01:57
Apparently the honey-coloured bits are titanium (dioxide) ...
(https://www.dakotamatrix.com/images/products/rutile33918a.jpg?maxwidth=444&maxheight=333&crop=auto&quality=100)
https://www.dakotamatrix.com/products/4012/rutile
Post by: evan_au on 30/11/2019 10:33:29
Quote from: ChiralSPO
Nice spectra!What technique did you use to generate the spectra due to different elements?
Unfortunately, the 10 keV on the horizontal axis doesn't give me enough clues...
Post by: alancalverd on 30/11/2019 11:25:19
Post by: Iwonda on 02/12/2019 04:45:44
Post by: chiralSPO on 02/12/2019 13:36:19
To my knowledge, some metals, like cobalt, copper, silver, gold, and platinum can be found in their metallic state in veins or nuggets, or even sometimes as crystals. More reactive metals, like titanium, iron, and nickel are usually found in compounds, but can be found as native metals. Highly active metals, like aluminum, calcium, magnesium, sodium, and potassium are essentially almost found as compounds.
EDX analysis is a good way of quantifying concentrations of elements at the surface of materials, but doesn't say much about the chemical environments they are in. XPS can usually be used to distinguish between oxidation states of the each element.
These may be useful:
https://srdata.nist.gov/xps/main_search_menu.aspx
https://en.wikipedia.org/wiki/Native_metal
Post by: Iwonda on 05/12/2019 06:51:02
Just to be sure, these metallic elements are incorporated as compounds, not their in their pure metallic state, yes?Not all as compounds, there is actual pure metal in some of these stones, I can not say how much is pure metal but a lot of metal can be seen with the naked eye in these stones and gemstones. I have broke apart a number of stones and picked the metal particle out of the debris. We have two binders full of scan results and all scans were done at a major lab or university and I must add that everyone reacted the same as you, saying that this can't be right. All of the data and research appear to point to one term and that's "impactites" I've max out on file space for this post but if you'd like to see more photos, I will have to do so in another post.
Thanks for the links...all and any info is helpful.
Post by: Bass on 20/12/2019 01:38:19
As to why quartz and metallic minerals are often found together- most metals go into solution easily in hydrothermal waters, which also commonly contain dissolved silica (quartz)- both of these tend to precipitate under the same PT conditions. Also, as magmas crystallize, they become more silicic (quartz rich) with "left over junk" (i.e. metals) that don't fit well into the lattices of the solidifying crystals. Often these end up together in the last phases of the cooling igneous rocks (good example is porphyry copper deposits).
Post by: Iwonda on 20/12/2019 03:42:26
Post by: Bass on 22/12/2019 22:07:45
Post by: Bored chemist on 23/12/2019 10:16:56
I can not say how much is pure metal but a lot of metal can be seen with the naked eye iHave you heard of fool's gold?
https://geology.com/gold/fools-gold/
Post by: chiralSPO on 24/12/2019 16:24:29
https://en.wikipedia.org/wiki/Pyrite
https://en.wikipedia.org/wiki/Galena
https://en.wikipedia.org/wiki/Mica
https://en.wikipedia.org/wiki/Hematite
https://en.wikipedia.org/wiki/Chalcopyrite
you might be able to identify your samples as metallic or nonmetallic based on their conductivities (just a handheld multimeter, set to resistance mode should do.)
Post by: Iwonda on 31/12/2019 05:08:16
Post by: Bored chemist on 31/12/2019 12:06:13
A lot of these stones were found using a metal detector so I was very curious as to why they were setting off the detector.Magnetic materials like iron oxide will trip a metal detector.
Some of this material appear to be unknown to science,Unknown to you doesn't mean it's unknown to science.
Post by: Iwonda on 05/01/2020 04:48:53
Post by: Border on 22/02/2020 15:34:41
Post by: Iwonda on 23/02/2020 04:22:56
What technique did you use to generate the spectra due to different elements?The electronic scans were produced at a material analysis lab using edx analysis.