ShapeCalc is an Excel-based tool that uses 2D crystal intersection widths and lengths to estimate 3D crystal shape.

ShapeCalc provides 3D (S:I:L) shape estimates for 2D width-length (w-l) input data. Best estimates are found by comparing the sample w/l distribution with 2618 model w/l distributions covering shapes from 1:1:1 to 1:20:20. Model w/l distributions are obtained by 20000 random sections of a given model shape using the CSDCorrections algorithm (Higgins, 2000). For each model shape, the 20000 w/l datapoints are binned into 25 bins with w/l increments of 0.04. Binned distributions for all 2618 models are stored in the database tab. Compared to existing 2D-to-3D projection tools, ShapeCalc offers more robust constraints in 3D crystal shape (including uncertainty estimates) for a wider range of naturally occurring crystal shapes. ShapeCalc is described and published, with open access; Mangler, M.F., Humphreys, M.C.S., Wadsworth, F.B. et al. Variation of plagioclase shape with size in intermediate magmas: a window into incipient plagioclase crystallisation. Contributions to Mineralogy and Petrology 177, 64 (2022). https://doi.org/10.1007/s00410-022-01922-9

Data

Summary

creation
2022-11-15
Maintenance Frequency
notApplicable

Informations

creation
2022-11-15
Unique resource identifier
http://data.bgs.ac.uk/id/dataHolding/13607999
Individual name
Dr Madeleine Humphreys
Organisation name
University of Durham
Position name
Department of Earth Sciences
City
Durham
Postal code
DH1 3LE
Electronic mail address
not available
Role code
originator
Individual name
Enquiries
Organisation name
British Geological Survey
Country
United Kingdom
Electronic mail address
not available
Role code
distributor
Individual name
Enquiries
Organisation name
British Geological Survey
Country
United Kingdom
Electronic mail address
not available
Role code
pointOfContact
Maintenance Frequency
notApplicable
Title
GEMET - INSPIRE themes, version 1.0
publication
2008-06-01
Keyword
Crystallography
Keyword
Models
Title
BGS Thesaurus of Geosciences
revision
2022
Keyword Type Code
dataCentre
Keyword
NERC_DDC
Access Restriction
otherRestrictions
Access Restriction
otherRestrictions
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]"
ISO Language code
eng

Download

Name
Microsoft Excel
Version
witheld
Name
Text file (TXT)
Version
witheld
Name
Microsoft Word (DOCX)
Version
witheld
Individual name
Enquiries
Organisation name
British Geological Survey
Country
United Kingdom
Electronic mail address
not available
Role code
distributor
Protocol
WWW:DOWNLOAD-1.0-http--download
Name
Data
OnLine function code
download

More info

File identifier
ee4a8894-5609-37a7-e053-0937940a6b49
ISO Language code
eng
Scope code
nonGeographicDataset
Hierarchy level name
non geographic dataset
Organisation name
British Geological Survey
Voice
+44 115 936 3100
Delivery point
Environmental Science Centre,Keyworth
City
NOTTINGHAM
Administrative area
NOTTINGHAMSHIRE
Postal code
NG12 5GG
Country
United Kingdom
Electronic mail address
enquiries@bgs.ac.uk
Role code
pointOfContact
Metadata standard version
2.3
Dataset URI
http://data.bgs.ac.uk/id/dataHolding/13607999
Scope code
nonGeographicDataset
Other
non geographic dataset
Title
INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology
publication
2011
Explanation
See the referenced specification
Title
Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
publication
2010-12-08
Explanation
See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
Statement
Underlying database of w/l distributions (20,000 datapoints each) for 2618 model shapes from 1:1:1 to 1:20:20 was produced using the CSDCorrections algorithm (Higgins, 2000)