"The company pioneering the work, Subterrane, believe they have identified five targets likely to be kimberlites
. We are working to better define where to drill.
Although magnetic signatures of known kimberlites
are not indicative of diamond content, the potential of the Stein cluster of high interest targets is further reinforced by heavy mineral samples collected down ice which contain indicator mineral grains that are indicative of diamond inclusion chemistry showing high chrome, low calcium G10D pyrope garnets.
The nearest known kimberlite
discovery to Stein is over 230 kilometers to the southeast and perpendicular to the regional ice flow direction.
Candy should appreciate a step up in trip this afternoon TALK OF THE TOON
Tango is considered the best of the 15 diamond-bearing kimberlite
"It would be very surprising if there weren't diamonds in these kimberlites
," lead researcher Greg Yaxley, of the Australian National University in Canberra, (http://in.reuters.com/article/2013/12/17/antarctica-diamonds-idINL6N0JW3Q020131217) told Reuters.
"These rocks represent the first reported occurrence of genuine kimberlite
in Antarctica," they wrote of the finds around Mount Meredith in the Prince Charles Mountains.
diamonds are sorted into 5,000 different categories of shape, colour and clarity and in many more than one polished gem will be cut from a single piece.
The diamonds mined today were formed deep in the earth billions of years ago and were delivered to the surface by a volcanic rock known as "kimberlite
"Twenty relatively small (50kg) samples from five kimberlite
localities returned at total of 67 diamonds," Crew Minerals said.
For instance, occurrences of kimberlite
indicator minerals were discovered during the course of a joint GSC-MRNF survey of esker sediments (Parent et al.
After rising, the magma cools and hardens into diamond-dotted kimberlite