mineral bridgmanite formation

Earths mantle minerals formed during meteorite event?

mineral bridgmanite formationThe minerals Bridgmanite and Ringwoodite are not naturally found on the surface of the Earth.

In theory they make up most of a couple of the Earths mantle layers, thats around a third of the planets rock.

But the Bridgmanite and Ringwoodite minerals have been discovered formed in the fragments of the Tenham meteorite event.

Were they formed during the energy event that exploded the meteorite high in our sky? These minerals appear to be found in ‘shock’ meteorites.

How is mineral Bridgmanite formed?

So scientists looked for another source of incredibly high pressures: collisions between asteroids in space, such as the one that created the Australian meteorite hundreds of millions of years ago. Analyzing a slice of the meteorite, researchers discovered that the crash briefly subjected the rock to hellish temperatures of about 2100°C and pressures about 240,000 times sea-level air pressure, they report online today in Science. In dark veins within the once-shattered sample, the researchers also found tiny 20- to 30-micrometer-wide blobs of the mineral. The frigid cold of space locked the mineral’s atoms in place, and slightly elevated pressures due to stresses inside the meteorite also helped preserve its crystalline structure.
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How is mineral Ringwoodite formed?

Apart from the mantle, natural ringwoodite has been found in many shocked chondritic meteorites, in which the ringwoodite occurs as fine-grained polycrystalline aggregates.

The mineral Ringwoodite was also discovered in the Australian Tenham meteorite.

Bridgmanite and Ringwoodite formed by electromagnetic event?

bridgmanite ringwoodite mineralCould the mineral Bridgmanite have been formed when the asteroid was formed, not during a supposed crash in space and why would 2 asteroid colliding create such high temperature and pressure? If it was part of an electromagnetic event (EDM of a larger solar body for exampled) then the electromagnetic forces involved might be enough.

Or during the event in Earths atmosphere that was the Tenham meteorite event? This would seem more likely and explain why parts of the rock turned into the eminerals Bridgmanite and Ringwoodit and why they remained – it did not happen in deep space but happened at its journeys end.

The Tenham meteorite was an airburst event, it exploded in the sky and did not form an impact crater. This would suggest that it was exploded by a discharge from the Earth, a high energy plasma event that could transform material.