Images for plagioclase grain shape and size (NERC grant NE/N009894/1)
Measurements of the aspect ratio of plagioclase grains in dolerites from sills. Photomicrographs (several per sample across each of the sills, at a magnification such that the long side of the field of view is 4.5mm long) are each accompanied by a drawing showing a pair of lines for each observable grain, giving the long and short axis of the grain intersection as viewed in thin section, together with a drawing showing only the long axes of each grain. A summary file provides the number of grains measured in each sample, together with the average aspect ratio, with 1σ uncertainties calculated using a bootstrap method. The grain size is reported for all grains measurable in the set of photomicrographs (in mm), and is taken as the length of the long axis for each grain intersection in thin section. The average grain size and the skew of the population is also provided. The choice of the area in each thin section to photograph and analyse was random, although any areas of late-stage alteration were avoided. This dataset is useful to anyone seeking to quantify plagioclase grain size in tabular mafic intrusions.
Simple
- Date (Creation)
- 2020-10-01
Originator
University of Cambridge
-
Professor Marian Holness
(
Department of Earth Sciences
)
Downing Street
,
Cambridge
,
CB2 3EQ
,
Principal investigator
University of Cambridge
-
Professor Marian Holness
(
Department of Earth Sciences
)
Downing Street
,
Cambridge
,
CB2 3EQ
,
- Maintenance and update frequency
- notApplicable notApplicable
- GEMET - INSPIRE themes, version 1.0
- BGS Thesaurus of Geosciences
-
- NGDC Deposited Data
- dataCentre
- Keywords
-
- NERC_DDC
- Access constraints
- otherRestrictions Other restrictions
- Other constraints
- licenceOGL
- Use constraints
- otherRestrictions Other restrictions
- Other constraints
- The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.
- Other constraints
- Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"
- Metadata language
- EnglishEnglish
- Topic category
-
- Geoscientific information
- Begin date
- 2015-08-01
- End date
- 2017-10-01
Reference System Information
No information provided.
- Hierarchy level
- nonGeographicDataset Non geographic dataset
- Other
- non geographic dataset
Conformance result
- Date (Publication)
- 2011
- Explanation
- See the referenced specification
- Pass
- No
Conformance result
- Date (Publication)
- 2010-12-08
- Explanation
- See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
- Pass
- No
- Statement
- Data obtained from high-resolution photomicrographs under plane-polarised light.
- File identifier
- b4778328-463d-4ecd-e054-002128a47908 XML
- Metadata language
- EnglishEnglish
- Hierarchy level
- nonGeographicDataset Non geographic dataset
- Hierarchy level name
- non geographic dataset
- Date stamp
- 2025-11-13
- Metadata standard name
- UK GEMINI
- Metadata standard version
- 2.3
Point of contact
British Geological Survey
Environmental Science Centre,Keyworth
,
NOTTINGHAM
,
NOTTINGHAMSHIRE
,
NG12 5GG
,
United Kingdom
+44 115 936 3100
- Dataset URI
- http://data.bgs.ac.uk/id/dataHolding/13607687
NERC Data Catalogue Service