absolutley JT

diamond preservation in kimberlites isnt a big issue, as the MgO contents in picoilemenites almost always proves that "kimberlites" tend to preserve diamond,when indicatorminerals , Kimberlites are common worldwide and Kimberlites make ideal diamond mines.
these gas and xenolith rich peridotic breccias freeze and dont weather and decompose until introduced to water when unwheathered theyre full of many rare mantle treasures some of which are extremely valuable gemstones other than diamond (eclogites,lherzolites, moissanite),

also graphite mines and nearby areas are totally unrelated to kimberlite . diamonds recovered from such operations are always graphatized and of poor quality even as industrial use

Howdy Everyone:

Hope you all had a Merry Christmas and are ready for a Prosperous New Year.

Scientists just released this information today about comets/asteroids creating diamonds. They are too small to be of commercial value but they are diamonds related to impacts!

The links are;

http://www.sciam.com/article.cfm?id=did-a-...12900-years-ago

or

http://uk.reuters.com/article/scienceNewsM...E5013YZ20090102

or

http://news.bbc.co.uk/2/hi/science/nature/7808171.stm

or

http://www.nytimes.com/2009/01/02/science/...&ei=5087%0A

Hopefully one of the links will still work when you read this post. Google listed 114 articles this afternoon so the information should remain on someone's server for awhile.

Sincerely,

ASTROBLEME

Fantastic info Johnny! Thanks for posting the links for us.

Mr. Tonko I really like your idea of the correlation between impacts and kimberlites. I was doing a little research on the subject. This is one of the most informative post I have read on any forum. Bennie and Mr. Tonko you guys have done a good job on this one

Dear amethystguy:

Thanks for the kind words. I'm glad you find the information useful.

This recent discovery of nano diamonds resulting from high speed impact has gotten me thinking...again. Knowing that diamond crystals will grow larger in the right environment, lab diamonds being grown on seed crystals are a good example, I think it may be possible that impacts may have created the "seed diamonds" that are now being mined as kimberlite eruptions. As the continental plates subduct, the nano diamonds and other carbon gets dragged downward into mantle where it is melted. It seems plausible to me that on a long time scale, these nano diamonds could develop into larger crystals. When the diamond bearing rock gets ejected up through the craton, the diamonds are transported from their deep growth zones in the kimberlite slurry.

At least that is something to consider, I think.

Sincerely,

ASTROBLEME

Wow! Very cool information, thank you Johnny. All those links work too by the way. Great reading!
I may have not worded myself correctly in my last post but I think I've got the gist of it.

Great information for everyone to learn about, I'm sure everyone who's been reading along so far, and does in the future will find this an awesome thread! Keep it coming Johnny! We all really enjoy reading about your experiences and discoveries!
Can't wait to see what is learned next that may cause a page or two from history to be adjusted.

CP

I just came across this new website that has some valuable information for diamond prospectors...

http://gemhunter.webs.com/diamonds.htm

ASTROBLEME

Great info Johnny. Have you ever looked at NM? Sure makes me curious about some of the places
I've been.

Hi Everyone:

This discussion has been running for more than a year and I had to delete the photos to free up some room for new postings. Please feel free contact me directly if you are interested in any of the pictures and I'll send you an e-mail copy.

Have a Merry Christmas!

Johnny

Oh rats, you must have hit a server memory limit Johnny. I've taken care of that I believe and you should not have that problem anymore.
Please do email those pics over and I'll reload them into the forums....hopefully in the right posts. Maybe if you number them for me? Then I'll have a good chance of getting them in the right places.

CP

Ok, got all those pics loaded back into the thread except one which we'll try to get in later if possible.
Thank you again for sharing them with us all Johnny, this is a great thread with awesome information, very glad to have the pics back to demonstrate the discussion.

CP

Johnny, why not tell us about diamonds found in lamprophere intrusives? I read up a bit on the lamprophere intrusives in the Wasatch Plateau of Central Utah, some years ago. The particular intrusives where in the cretaceous period sandstones, and were a nuisance for the coal miners.

yep, id like to have that kind of nuisance myself!

Except there they really weren't diamond-bearing as those found in the Broken Hill region of Australia, or the SE Urals of Russia.

Dear Coalbunny:

Ask and you shall receive...

Years ago, I acquired some raw field samples from what is now known as Crater of Diamonds State Park in Arkansas for my collection. The diamond deposit is actually an eroded lamproite pipe. I have been working on similar intrusive events here in Colorado. If you come across rocks (even in coal mines) that resemble those I've attached in this photo, they may contain diamonds and my advice is that a sample should be taken and properly analyzed.

Take care,

Johnny


[attachment=3800:IMG_1014.JPG]