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Rendiconti Lincei

, Volume 28, Issue 4, pp 595–604 | Cite as

Inclusions in super-deep diamonds: windows on the very deep Earth

  • Fabrizio Nestola
Earth and Materials Science

Abstract

Diamonds are the deepest terrestrial materials that reach the Earth’s surface after a very long and complex travel through our Planet. In detail, these pure-carbon minerals might be formed at very variable depths in the mantle from about 120–250 km, so-called “lithospheric diamonds” or from about 300–1000 or more km, so-called “super-deep diamonds”. Both lithospheric and super-deep diamonds can transport minerals and/or fluid inclusions within them, which are real “fragments of deep Earth” allowing geologists to better understand how the Earth works at those great depths. Although super-deep diamonds only represent about 6% of the global diamond population, such special objects are extremely intriguing as they form at depths potentially even >1000 km in the mantle, opening new scenarios on what we knew about the interior of the Earth. This is why super-deep diamonds are among the most studied samples in mantle mineralogy. In this review, I will focus on the two most common mineral inclusions in super-deep diamonds, ferropericlase (Mg,Fe)O, and CaSiO3-walstromite, on the recent discovered hydrous ringwoodite Mg2SiO4 within a Brazilian diamond and on a new category of large diamonds, called CLIPPIR.

Keywords

Diamond Super-deep diamonds Inclusions Lower mantle Transition zone CaSiO3-walstromite Ferropericlase Ringwoodite 

Notes

Acknowledgements

The author thanks the European Research Council for supporting his research through the ERC Starting Grant INDIMEDEA (Agreement No. 307322) and two anonymous referees.

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Copyright information

© Accademia Nazionale dei Lincei 2017

Authors and Affiliations

  1. 1.Dipartimento di GeoscienzeUniversità degli Studi di PadovaPaduaItaly

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