Crystallographic relationships between diamond and its olivine inclusions
The syngenicity of inclusions in diamonds is generally assumed on the basis of morphological criteria. It has been suggested that an epitactic relation between an inclusion and its host would represent a more robust proof of syngenicity. Yet the crystallographic relations between inclusions and thei...
Main Authors: | , , |
---|---|
Other Authors: | , , |
Format: | Conference Object |
Language: | English |
Published: |
Geological Society of India
2012
|
Subjects: | |
Online Access: | http://hdl.handle.net/11577/2488096 |
id |
ftunivpadovairis:oai:www.research.unipd.it:11577/2488096 |
---|---|
record_format |
openpolar |
spelling |
ftunivpadovairis:oai:www.research.unipd.it:11577/2488096 2024-01-28T10:09:45+01:00 Crystallographic relationships between diamond and its olivine inclusions NESTOLA, FABRIZIO NIMIS, PAOLO J. W. Harris Nestola, Fabrizio Nimis, Paolo J. W., Harris 2012 ELETTRONICO http://hdl.handle.net/11577/2488096 eng eng Geological Society of India country:IND ispartofbook:Long Abstracts 10th International Kimberlite Conference firstpage:10IKC-242 numberofpages:3 http://hdl.handle.net/11577/2488096 diamond olivine syngenesi protogenesis info:eu-repo/semantics/conferenceObject 2012 ftunivpadovairis 2024-01-03T17:41:13Z The syngenicity of inclusions in diamonds is generally assumed on the basis of morphological criteria. It has been suggested that an epitactic relation between an inclusion and its host would represent a more robust proof of syngenicity. Yet the crystallographic relations between inclusions and their hosts are rarely determined and a systematic survey of these relations for the different mineral species is lacking. Modern in-situ single-crystal X-ray analysis can provide a high-quality, non-destructive, three-dimensional examination of the geometrical relations between the crystal lattices of the inclusion and of the diamond host. We will present preliminary results of an on-going single-crystal X-ray diffraction study of olivine inclusions in diamond. We have investigated four diamonds from the Udachnaya kimberlite (Yakutia). Three of the diamonds include a single olivine and the fourth diamond includes three olivines. All olivines show a negative-crystal shape. For the first three diamonds, the included olivines show the following orientations (within ±12°): a) the (111) plane of the diamond is parallel to the (-1-33) plane of the olivine; b) the (-111) plane of the diamond is parallel to the (010) plane of the olivine; c) the (1-11) plane of the diamond is parallel to the (150) plane of the olivine. In the fourth diamond, all three included olivines showed a similar orientation, with the (001) plane of the diamond being parallel to the (010) planes of the olivines. Our preliminary data indicate a wide range of possible orientations for olivine in diamond. Our database is being extended to improve the statistical significance of our results for both single and multiple inclusions of olivine in diamond. Conference Object Yakutia Padua Research Archive (IRIS - Università degli Studi di Padova) |
institution |
Open Polar |
collection |
Padua Research Archive (IRIS - Università degli Studi di Padova) |
op_collection_id |
ftunivpadovairis |
language |
English |
topic |
diamond olivine syngenesi protogenesis |
spellingShingle |
diamond olivine syngenesi protogenesis NESTOLA, FABRIZIO NIMIS, PAOLO J. W. Harris Crystallographic relationships between diamond and its olivine inclusions |
topic_facet |
diamond olivine syngenesi protogenesis |
description |
The syngenicity of inclusions in diamonds is generally assumed on the basis of morphological criteria. It has been suggested that an epitactic relation between an inclusion and its host would represent a more robust proof of syngenicity. Yet the crystallographic relations between inclusions and their hosts are rarely determined and a systematic survey of these relations for the different mineral species is lacking. Modern in-situ single-crystal X-ray analysis can provide a high-quality, non-destructive, three-dimensional examination of the geometrical relations between the crystal lattices of the inclusion and of the diamond host. We will present preliminary results of an on-going single-crystal X-ray diffraction study of olivine inclusions in diamond. We have investigated four diamonds from the Udachnaya kimberlite (Yakutia). Three of the diamonds include a single olivine and the fourth diamond includes three olivines. All olivines show a negative-crystal shape. For the first three diamonds, the included olivines show the following orientations (within ±12°): a) the (111) plane of the diamond is parallel to the (-1-33) plane of the olivine; b) the (-111) plane of the diamond is parallel to the (010) plane of the olivine; c) the (1-11) plane of the diamond is parallel to the (150) plane of the olivine. In the fourth diamond, all three included olivines showed a similar orientation, with the (001) plane of the diamond being parallel to the (010) planes of the olivines. Our preliminary data indicate a wide range of possible orientations for olivine in diamond. Our database is being extended to improve the statistical significance of our results for both single and multiple inclusions of olivine in diamond. |
author2 |
Nestola, Fabrizio Nimis, Paolo J. W., Harris |
format |
Conference Object |
author |
NESTOLA, FABRIZIO NIMIS, PAOLO J. W. Harris |
author_facet |
NESTOLA, FABRIZIO NIMIS, PAOLO J. W. Harris |
author_sort |
NESTOLA, FABRIZIO |
title |
Crystallographic relationships between diamond and its olivine inclusions |
title_short |
Crystallographic relationships between diamond and its olivine inclusions |
title_full |
Crystallographic relationships between diamond and its olivine inclusions |
title_fullStr |
Crystallographic relationships between diamond and its olivine inclusions |
title_full_unstemmed |
Crystallographic relationships between diamond and its olivine inclusions |
title_sort |
crystallographic relationships between diamond and its olivine inclusions |
publisher |
Geological Society of India |
publishDate |
2012 |
url |
http://hdl.handle.net/11577/2488096 |
genre |
Yakutia |
genre_facet |
Yakutia |
op_relation |
ispartofbook:Long Abstracts 10th International Kimberlite Conference firstpage:10IKC-242 numberofpages:3 http://hdl.handle.net/11577/2488096 |
_version_ |
1789339950468038656 |