Ocean island olivine and spinel major element compositions (NERC Grant NE/T012455/1)
The dataset consists of elemental compositions determined for olivine and spinel from 13 ocean islands, including Azores, Balleny, Cook-Austral, Crozet, Cape Verde, Fernando de Noronha, Galapagos, Juan Fernandez, Marquesas, Society, Tristan-Gough, Tahiti, and Trindade). These samples were loaned from Sedgwick Museum, University of Cambridge and National History Museum, London, except the Galapagos samples provided by D. Geist. Elemental compositions determined for three secondary standards (San Carlos olivine, MongOl olivine, and NHNM164905 augite) are also included in the dataset. The data were acquired using a Cameca SX100 electron microscope at the Department of Earth Sciences, University of Cambridge, in June, July, August and November 2021. The elements analysed include Mg, Si, Fe, Al, Ca, P, Cr, Mn, and Ni in olivine, and Mg, Si, Fe, Al, Ca, Cr, Mn, and Ti in spinel. Data acquired from each analysis were saved in four txt files, which are for oxide concentrations, elemental concentrations, standard deviation, and detection limit, respectively. The data for ocean island samples were used to calculate olivine crystallisation temperature and mantle potential temperature based on an aluminium-in-olivine thermometer and modelling of mantle melting. All data collected within the project duration are in this dataset.
nonGeographicDataset
https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item177968
name: Data
function: download
http://data.bgs.ac.uk/id/dataHolding/13608054
eng
geoscientificInformation
publication
2008-06-01
Islands
Olivine
NGDC Deposited Data
Spinel
revision
2022
NERC_DDC
2021-08-01
2021-11-30
creation
2023-03-13
notApplicable
Olivine crystals were analysed using an accelerating voltage of 15 kV and two different beam currents: 20 nA for major elements, and 100 nA for minor/trace elements. To acquire high precision Al measurements (for the consequent thermometric calculation), a long acquisition time of 150 seconds was used. Spinel crystals (in olivine) were analysed using a voltage of 15 kV and a beam current of 40 nA. To monitor the accuracy and consistency of the analysis, secondary standards were analysed every 6 to 8 hours in between the unknowns.
publication
2011
false
See the referenced specification
publication
2010-12-08
false
See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
txt files
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.
Department of Earth Sciences
University of Cambridge
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originator
British Geological Survey
distributor
British Geological Survey
pointOfContact
British Geological Survey
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United Kingdom
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pointOfContact
2024-04-18