Talk:Heavy mineral sands ore deposits

Excellent article. I added "silica" and "kyanite" to the list of trash minerals. Silica from experience is very prominent in placer HM's along the Eastern Coast of the US. Deekayfry (talk) 19:41, 25 December 2010 (UTC)

Titanium

Note the following quotation from the article:
"Heavy mineral sands are a class of ore deposit which is an important source of zirconium, titanium, thorium, tungsten, rare-earth elements, the industrial-grade diamonds, sapphires, garnets, and occasionally precious metals or gemstones.
"Heavy mineral sands are placer deposits formed most usually in beach environments by concentration due to the specific gravity of the mineral grains. It is equally likely that some concentrations of heavy minerals (aside from the usual gold placers) exist within streambeds, but most are of a low grade and are relatively small."
Guess what! Titanium is not a heavy metal. Titanium is among the light metals that include lithium, beryllium, sodium, magnesium, aluminum, potassium, scandium, and vanadium.
Many of the actual heavy metals are dangerous to life, such as arsenic, cadmium, indium, promethium, antimony, mercury, thallium, lead, polonium, radium, actinium, uranium, neptunium, and plutonium. For a multifarious one, plutonium is a chemical poison, it emits deadly radioactivity, and it is a carcinogen. These are what people commonly call "heavy metals" as in "heavy metal poisoning" and "radiation sickness".
Many other heavy metals are quite benign, including zirconium, niobium, silver, gold, barium, tantalum, the platinum group, and bismuth, which are often used in medicine and dentistry.
The only light metal that is known to be dangerous in small amounts is beryllium.
47.215.183.159 (talk) 08:44, 27 September 2017 (UTC)

External links modified (January 2018)

Hello fellow Wikipedians,

I have just modified one external link on Heavy mineral sands ore deposits. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

• Added archive https://web.archive.org/web/20160307171853/http://epa.wa.gov.au/EPADocLib/1621_B1098.pdf to http://epa.wa.gov.au/EPADocLib/1621_B1098.pdf

When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.

This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 5 June 2024).

• If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
• If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers.—InternetArchiveBot (Report bug) 13:12, 25 January 2018 (UTC)

HMC vs THM

Is HMC the same as THM, and the South African deposit is 86% of 1.1% vs 30% of 1% for most other deposits? — Preceding unsigned comment added by 98.165.88.158 (talk) 18:11, 23 June 2020 (UTC)