Talk:Kimberlite

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Has anyone tried making a mineral water with kimberlite emphasizing the from diamonds perspective. Unlike some spa waters kimberlite could have an advantage. Peer reviewed published research notes that buckminsterfullerene when fed to rodents makes them twice as long. beyond microscopic diamonds, nanodiamonds the same diameter as buckminsterfullerene may be fairly plentiful at kimberlite. It is possible that hydrogenating these nanodiamonds will give a similar longevity effect as buckminsterfuillerene if scientifically measured. — Preceding unsigned comment added by 68.185.2.34 (talk) 01:14, 1 May 2012 (UTC)[reply]

Kimberlite is found in extinct volcanoes. Within the kimberlite are found naturally occuring diamonds. The name comes from Kimberly, South Africa where it was first discovered that diamonds are found in this geological material.

I changed "Σcarbon dioxide" in

The mineralogy of Group II kimberlites may represent a similar melting environment to that of Group I kimberlites, the difference in mineralogy being caused by the preponderance of water versus Σcarbon dioxide.

to "carbon dioxide". I don't know what "Σcarbon dioxide" is or whether it even exists. AxelBoldt 22:41, 18 April 2006 (UTC)[reply]

Sigma is used to represent "total" so it meant "total CO2". In case you wanted to know. Rolinator 01:18, 19 April 2006 (UTC)[reply]

Yes, thanks, that's interesting. Should we put it back in then? I wonder whether the Sigma adds anything to the meaning of the sentence though. I suppose we wouldn't talk about "Σwater" either. AxelBoldt 22:16, 19 April 2006 (UTC)[reply]

Well, it's a measure of CO₂, which is how carbon is reported in the laboratory. When doing a CIPW Norm, you only get a list of ingredients, and you don't neccessarily know if they go into any particular mineral until you work through the norm. CIPW norms don't always work well on these rare rocks because the mineral phase diagrams which the norm is predicated upon, are poorly constrained at depths (ie; Pressure and Temperature) which generate kimberlites, for a start. Secondly, the mineralogy in the rocks is diagnostic of high pressures. In a rock of the same composition generated at shallower depths you may get different minerals. The prime example of this is silica undersaturated high-alumina basalts which are normative for olivine but sometimes contain pyroxene and nepheline (not the predicted olivine); the the CIPW norm will derive an estimated mineralogy but it may differ from the observed. The amount of CO₂ in the system for a kimberlite is diagnostic; it may be present in the carbonate minerals, as graphite (which is analysed as CO₂ because it is oxidised during analysis, hence giving a false CIPW estimate of carbonate abundance if one assumes all CO₂ is present in carbonates), and even as CO₂ trapped in pores and inclusions and hydrous phases (especially phlogopite mica). Thus why the sum of CO₂ is used, because it is diagnostic of this kind of rock as opposed to Lamproite and some lamprophyres or alkali basalts. It could therefore be put back in; maybe with a footnote explaining this. Or at least with a link to this talk age and the above explanation. Rolinator 01:15, 20 April 2006 (UTC)[reply]

Great, I learned a bit there. I've done CIPW calculations (by hand :-) just not for these exotic rock types. However, I'd guess that most readers would be lost here. So we would need a more simplified and/or detailed explanation - plus an article on normative mineralogic calculations as well as those four CIPW guys. So maybe rather than a footnote - a link to an explanatory article would be better. Vsmith 01:38, 20 April 2006 (UTC)[reply]

Yeah. CIPW norms are a major headache. There are a few free to air CIPW norm calculators. Most work with silica saturated rocks with a primarily hydrous vapor phase. In the end, the CIPW norm is best used to describe aphanitic rocks...as was first intended...but its often useful for rocks with a lot of groundmass minerals. Like Kimberlites. I also cleaned up the above...7 a.m. chicken scratchings and all that jazz. I'll have a look over what's on the CIPW norms page.Rolinator 05:24, 20 April 2006 (UTC)[reply]

I removed;

Kimberlites are a signature mineral for diamonds, and as such are of great 'cursor' value to diamond miners/prospectors. There is a large amount of ongoing research taking place regarding Kimberlites as a diamond 'precursor', Lisa Windsor of Bristol University being one of the academic researchers foremost in this field.

for several reasons. Firstly, we need a link, or it's just hearsay. Secondly, kimberlite is not a mineral it is a rock. And it is not a precursor for diamond, it is the hosst of diamonds, although it would be more correct to say it is the material which brings diamonds to the surface, and that the mantle itself is the source of diamonds. And to say that finding a kimberlite leads a diamond prospector to diamonds is at best redundant, regardless of whtever you meant by'cursor value.

In terms of what I suggest; get a link, and we can talk about indicator minerals versus kimberlites as an exploration tool.Rolinator 06:10, 16 December 2006 (UTC)[reply]

Check out normative mineralogy. Rolinator 06:57, 20 April 2006 (UTC)[reply]

I've removed a copyright violation from http://www.geology.ubc.ca/research/diamonds/kopylova/intro/definition.html and related pages which was added by User:Rananjay on 18 October 2007 (the user's only article edits were on that date). Some of the material was a direct copy/paste from that website whereas other added material was from elsewhere. The above website is a valid source and is included in the reference section and would serve as a source for properly expanding the article, but not as a direct copy. Vsmith (talk) 01:45, 21 January 2008 (UTC)[reply]

What is the latest kimberlite eruption? The page here says it was 50 million years ago in Canada but dosen't mention the volcano's name.

Kimberlite Dikes and diatremes occur a lot of places around the world, so why the lone mention of the two minor occurrences in Southwestern Pennsylvania, USA to the exclusion of others. They are not even very significant occurrences - there are several more remarkable Kimberlite occurrences including more geologically recent (Eocene) topographically expressed diatremes even within a couple hundred km. radius of these (Mole Hill, Trimble Knob, Ugly Mountain in Virginia and West Virginia for starters). A cataloging of all the occurrence even in just N. America would be major project - so maybe this paragraph should be removed? — Preceding unsigned comment added by Yunzer (talk • contribs) 18:27, 14 December 2015 (UTC)[reply]

That would seem reasonable to me. Mikenorton (talk) 20:06, 14 December 2015 (UTC)[reply]

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This article was the subject of a Wiki Education Foundation-supported course assignment, between 12 January 2024 and 10 April 2024. Further details are available on the course page. Student editor(s): TheBigPurplePeopleEater (article contribs). Peer reviewers: Sharleen Lawrence.

— Assignment last updated by Ghostpants321 (talk) 23:35, 1 March 2024 (UTC)[reply]

I made quite a few edits throughout this article for a course I am taking. I corrected some grammar in the lead and modified a few sentences to fix the flow of it. I have also added sections for Exploration techniques and Historical significance as it felt that these topics were missing from the article. I also heavily modified the geochemical section from bullet form to a few paragraphs with more information. Many citations, links and images were also added throughout the article. If you have any questions or suggestions about the edits, feel free ot reach out or comment. Most changes can be found in my sandbox User:TheBigPurplePeopleEater/Kimberlite. TheBigPurplePeopleEater (talk) 03:36, 11 April 2024 (UTC)[reply]