Nucleation environment of diamonds from Yakutian kimberlites
The micro-inclusions located in the genetic centre of Yakutian diamond monocrystals have been studied using optical (anomalous birefringence, photo luminescence, cathodoluminescence) and microanalytical (electron-microprobe, proton-microprobe, scanning electron microscope) methods. Most diamonds nuc...
Main Authors: | , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
1998
|
Subjects: | |
Online Access: | https://researchers.mq.edu.au/en/publications/e02ea117-ba4c-4366-a906-c0f179b82671 http://www.scopus.com/inward/record.url?scp=0031755194&partnerID=8YFLogxK |
id |
ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/e02ea117-ba4c-4366-a906-c0f179b82671 |
---|---|
record_format |
openpolar |
spelling |
ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/e02ea117-ba4c-4366-a906-c0f179b82671 2024-06-02T08:15:51+00:00 Nucleation environment of diamonds from Yakutian kimberlites Bulanova, G. P. Griffin, W. L. Ryan, C. G. 1998 https://researchers.mq.edu.au/en/publications/e02ea117-ba4c-4366-a906-c0f179b82671 http://www.scopus.com/inward/record.url?scp=0031755194&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Bulanova , G P , Griffin , W L & Ryan , C G 1998 , ' Nucleation environment of diamonds from Yakutian kimberlites ' , Mineralogical Magazine , vol. 62A , no. PART 3 , pp. 409-419 . article 1998 ftmacquarieunicr 2024-05-07T03:23:29Z The micro-inclusions located in the genetic centre of Yakutian diamond monocrystals have been studied using optical (anomalous birefringence, photo luminescence, cathodoluminescence) and microanalytical (electron-microprobe, proton-microprobe, scanning electron microscope) methods. Most diamonds nucleated heterogeneously on mineral seeds, that lowered the energy barrier to nucleation. Nucleation of peridotitic diamonds occurred on a matrix of graphite+iron+wüstite, in an environment dominated by forsteritic olivine and Fe-Ni sulfide. Nucleation of eclogitic diamonds occurred on a matrix of sulfide ± iron in an environment dominated by Fe-sulfide and omphacite (± K-Na-Al-Si-melt). The mineral assemblages recorded in the central inclusions of Yakutian diamonds indicate that they grew in a reduced environment, with oxygen fugacity controlled by the iron-wüstite equilibrium. Nucleation of diamond occurred in the presence of a fluid, possibly a volatilerich silicate melt, highly enriched in LIL (K, Ba, Rb, Sr) and HFSE (Nb, Ti, Zr) elements. This fluid also carried immiscible Fe-Ni-sulfide melts, and possibly a carbonatitic component; the introduction of this fluid into a reduced refractory environment may have been accompanied by a thermal pulse, and may have created the conditions necessary for the nucleation and growth of diamond. diamond, inclusions, nucleation, growth, Yakutia, kimberlite. Article in Journal/Newspaper Yakutia Macquarie University Research Portal |
institution |
Open Polar |
collection |
Macquarie University Research Portal |
op_collection_id |
ftmacquarieunicr |
language |
English |
description |
The micro-inclusions located in the genetic centre of Yakutian diamond monocrystals have been studied using optical (anomalous birefringence, photo luminescence, cathodoluminescence) and microanalytical (electron-microprobe, proton-microprobe, scanning electron microscope) methods. Most diamonds nucleated heterogeneously on mineral seeds, that lowered the energy barrier to nucleation. Nucleation of peridotitic diamonds occurred on a matrix of graphite+iron+wüstite, in an environment dominated by forsteritic olivine and Fe-Ni sulfide. Nucleation of eclogitic diamonds occurred on a matrix of sulfide ± iron in an environment dominated by Fe-sulfide and omphacite (± K-Na-Al-Si-melt). The mineral assemblages recorded in the central inclusions of Yakutian diamonds indicate that they grew in a reduced environment, with oxygen fugacity controlled by the iron-wüstite equilibrium. Nucleation of diamond occurred in the presence of a fluid, possibly a volatilerich silicate melt, highly enriched in LIL (K, Ba, Rb, Sr) and HFSE (Nb, Ti, Zr) elements. This fluid also carried immiscible Fe-Ni-sulfide melts, and possibly a carbonatitic component; the introduction of this fluid into a reduced refractory environment may have been accompanied by a thermal pulse, and may have created the conditions necessary for the nucleation and growth of diamond. diamond, inclusions, nucleation, growth, Yakutia, kimberlite. |
format |
Article in Journal/Newspaper |
author |
Bulanova, G. P. Griffin, W. L. Ryan, C. G. |
spellingShingle |
Bulanova, G. P. Griffin, W. L. Ryan, C. G. Nucleation environment of diamonds from Yakutian kimberlites |
author_facet |
Bulanova, G. P. Griffin, W. L. Ryan, C. G. |
author_sort |
Bulanova, G. P. |
title |
Nucleation environment of diamonds from Yakutian kimberlites |
title_short |
Nucleation environment of diamonds from Yakutian kimberlites |
title_full |
Nucleation environment of diamonds from Yakutian kimberlites |
title_fullStr |
Nucleation environment of diamonds from Yakutian kimberlites |
title_full_unstemmed |
Nucleation environment of diamonds from Yakutian kimberlites |
title_sort |
nucleation environment of diamonds from yakutian kimberlites |
publishDate |
1998 |
url |
https://researchers.mq.edu.au/en/publications/e02ea117-ba4c-4366-a906-c0f179b82671 http://www.scopus.com/inward/record.url?scp=0031755194&partnerID=8YFLogxK |
genre |
Yakutia |
genre_facet |
Yakutia |
op_source |
Bulanova , G P , Griffin , W L & Ryan , C G 1998 , ' Nucleation environment of diamonds from Yakutian kimberlites ' , Mineralogical Magazine , vol. 62A , no. PART 3 , pp. 409-419 . |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1800740161764458496 |