When I finished my geological training, diamonds were "only to be found in South Africa". Since then they can be found "almost anywhere" on the planet.
During the early 1990's there were no diamond finds in Canada. Today, they can be found in every province and territory of this country.
I have investigated a potential diamond property in my area (unheard-of before) and the prospects are good.
Why not in Central Iran?
Kimberlite (and related) intrusions have been taking place since the Earth was created. Unfortunately, their age dates are not easy to establish, but there are certainly from the Precambrian to Tertiary.
DEAR GHOLAMREZA
GOOD MORNING. COULD YOU PLEASE DESCRIBE THE GEOLOGY OF YOUR AREA IN CENTRAL IRAN (I.E. THE VOLCANIC DIKES OR DIATREMES) AND SHOW SOME PHOTOS OF THE ROCKS THAT YOU STUDY. I THINK, REGARDING IRAN, IT IS LOCATED GEOTECTONICALLY IN AN UNCONVENTIONAL OROGENIC SETTING. IT IS NOT THE TYPICAL GEOLOGICAL ENVIRONMENT WHERE DIAMOND DEPOSITS ARE FOUND (I.E. IN CRATONS OR IN PERI-CRATONIC MOBILE BELTS). HOWEVER, UNCONVENTIONAL DIAMOND DEPOSITS HAVE BEEN FOUND AROUND THE WORLD AND PARTICULARLY IN BORNEO, THE URALS, CALIFORNIA, NSW, BURMA, THAILAND, IRELAND, VICTORIA, TASMANIA, THE APPALACHIANS, SIBERIA, NORTHERN ALGERIA, SUMATRA, POSSIBLY NORTHERN GREECE AND IN THE KARASHOHO SHOSHONITIC PIPE NEAR IRAN (IN UZBEKISTAN). IN AN OROGENIC BELT (LIKE THAT OF IRAN), DIAMONDS COULD BE FORMED DURING FLAT SUBDUCTION (SEE ARTICLES BY DEREK WYMAN) AND THEN PICKED UP BY RAPIDLY ASCENDING LAMPROPHYRIC MAGMAS. SO THERE ARE SOME CHANCES THAT YOU CAN FIND DIAMONDS IN IRAN.
BEST REGARDS
IOANNIS
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