Publications des scientifiques de l'IRD

Schoor M., Boulliard J. C., Gaillou E., Duparc O. H., Esteve I., Baptiste B., Rondeau B., Fritsch Emmanuel. (2016). Plastic deformation in natural diamonds : rose channels associated to mechanical twinning. Diamond and Related Materials, 66, p. 102-106. ISSN 0925-9635.

Titre du document
Plastic deformation in natural diamonds : rose channels associated to mechanical twinning
Année de publication
2016
Type de document
Article référencé dans le Web of Science WOS:000379633000014
Auteurs
Schoor M., Boulliard J. C., Gaillou E., Duparc O. H., Esteve I., Baptiste B., Rondeau B., Fritsch Emmanuel
Source
Diamond and Related Materials, 2016, 66, p. 102-106 ISSN 0925-9635
Hollow channels in diamond are well acknowledged to be the result of dissolution processes. In this article we demonstrate that some hollow channels in natural diamonds are the consequence of intense plastic deformation by mechanical twinning. Two mixed-habit diamonds presenting numerous geometrical hollow tubes were studied. X-ray Laue analyses showed the presence of microtwins. At the intersection of microtwins, displacements and cracks are generated, creating the hollow channels observed. The presence of the cracks seems to have released the internal stress, as there was less to no signs of deformation at and around them. Further dissolutions are sometimes but not always seen within the cavities. Mechanical twinning, so far mostly identified in pink to purple diamonds, might be more widespread than originally thought in natural diamonds.
Plan de classement
Géologie et formations superficielles [064] ; Géophysique interne [066]
Description Géographique
ZIMBABWE
Localisation
Fonds IRD [F B010067667]
Identifiant IRD
fdi:010067667
Contact