The inclusion of Ringwoodite is in Wollastromite and is not in the diamond
The inclusion of Ringwoodite (olivine-peridot) is in Wollastromite(Wollastonite-pyroxene) and is not in the diamond
Basalt is made of mostly three crystals, pyroxene, olivine and feldspar. Kimberlite (mantle magma) volcanic pipes which carry this igneous magma from the mantle to the surface pass though basalt and are in any case olivine rich(dunite) and pyroxene rich (peridotite) magmas. These magmatic fluids include chromite, garnet, ilmenite, rutile, apatite(teeth enamel) and mica crystals.
So as the carbon (diamond-reduced carbon dioxide-reduced carbon monoxide) makes its way to the surface in a volatile bubbling mass, it picks up crystals of the surrounding country rock, mostly pyroxene and olivine, because that is what the mantle is made up of and some of the other crystals mentioned above and the Kimberlite carries them to the surface.
This mineral mass of Ringwoodite-Wollastromite (glorified basalt) is on the outside of the diamond, not fully enclosed, so it could have been picked up anywhere.along that Kimberlite pipe even at deep crustal to shallow crustal depths.
The diamond is also poorly crystallized. If it had been euhedral ( well formed crystal) and the Ringwoodite had been found inside a bi-pyramidal octagonal diamond, It might give more credence to this Ringwoodite-Wollastromite deep mantle origin, but as it is not in the center, I do give its original depth origin as definite by any means.
Also, there is no the water content in the chemical formula of olivine or Ringwoodite, that is, Mg2SiO4 to Fe2SiO4 .Therefore water content can only be included in bubbles or vesicles in that crystal.
Vesicles or bubbles containing water or carbon dioxide can be found in any mineral or crystal in an explosive type magma such as kimberlite or a volcano like Mount St Helens or Mt. Etna. According to literature, manufactured synthetic Ringwoodite may contain up to 2.6% water, I assume again this is in bubbles in the crystal not in the crystal structure itself. No where is this made clear in these articles.
I guess you have to be a geologist to read between the lines.
So we have an ocean of water, where again? In laboratory made surface Ringwoodite and shock metamorphic olivine in veins in meteorite? Mmm. Yeah. Mmm.
I am not talking about original metamorphic water to derive the minerals.
There is no attached water molecule to Ringwoodite. The chemical formula is the same as that of Olivine.(Mg2SiO4 to Fe2SiO4 with a solid solution percentage variability existing for iron and magnesium).
Lastly Ringwoodite found in veinlets in meteorites is a shock metamorphic olivine. Kimberlite pipes intrude themselves through the crust in a blast shock metamorphic style changing the country rock near the surface of the earth based on their high carbon dioxide and high water contact.
This shock metamorphic conversion of Olivine to Ringwoodite could have occurred at a high temperature low pressure environment. Heaven only knows what conditions prevailed in Ringwoodite formation in Meteorites, possibly high pressure high temperature OR low temperature high pressure.
Did these basaltic meteorites get their Ringwoodite from collisions or from original planetary core formation. Was that meteorite from a core or planetary body since destroyed. If Ringwoodite is shock high pressure low temperature created, than shock conditions on the Earth's surface in explosive eruptions could just as easily have made it. Ringwoodite does not have to come from depth at all.
So, I dispute the fact of Ringwoodite coming from great depths because it is:
1) On the outside of an diamond.
2) The diamond is not euhedral(well crytallized)
3) Shock metamorphism to the diamond at the Earth's surface as with meteorites could just as easily have formed this crystal.
One tiny crystal on the outside of a badly formed diamond is much more likely to just be contamination.
How about a new idea for a big juicy grant. Why do the researchers not get the universities to fund them to find water bubbles inside diamonds, but only make damn sure they are well formed (euhedral diamonds)
Now water bubbles inside diamonds would not be open to debate because of the depth they are formed at. Please no artificial diamonds are allowed to be sneaked in for papers. Please date the water in these bubbles.
Did anyone date the water content in this tiny crystal or is the water contact real or just thumb-suck based on average water content for Laboratory Ringwoodite or Meteorite Ringwoodite? I doubt if there was enough of a sample at 60 micro meters.
As you can see, I have a few questions about this paper.
Chris Landau (geologist)
14th March 2014