677076df-dcc3-7230-e054-002128a47908
English
dataset
British Geological Survey
+44 115 936 3100
Environmental Science Centre,Keyworth
NOTTINGHAM
NOTTINGHAMSHIRE
NG12 5GG
United Kingdom
enquiries@bgs.ac.uk
pointOfContact
2024-03-27
UK GEMINI
2.3
http://data.bgs.ac.uk/id/dataHolding/13607279
WGS 84 (EPSG::4326)
Glass geochemical data of Late Quaternary tephra from Main Ethiopian Rift (NERC grant NE/L013533/1)
2018-02-15
creation
http://data.bgs.ac.uk/id/dataHolding/13607279
Glass major element geochemical data on Late Quaternary tephra deposits from the Main Ethiopian Rift volcanoes. These data were acquired using Electron Microprobe Analysis, and secondary standard data (MPI-DING glasses) are also included. All samples were given a unique name related to the outcrop from which they were obtained. Outcrops are named "MER" followed by a 3-digit number (e.g. MER153). Samples from a given outcrops are given the same name, followed by a letter (e.g. MER153A). Outcrop localities, with GPS coordinates (Lat Long WGS84) and brief description of the geology are also included. These data are published as Supplementary Files to a paper published in Journal of Volcanology and Geothermal Research: Fontijn et al (2018), https://doi.org/10.1016/j.jvolgeores.2018.02.001.
Karen Fontijn
University of Oxford
Department of Earth Sciences
South Parks Road
Oxford
OX1 3AN
not available
pointOfContact
notApplicable
https://resources.bgs.ac.uk/images/geonetworkThumbs/677076df-dcc3-7230-e054-002128a47908.png
Geology
GEMET - INSPIRE themes, version 1.0
2008-06-01
publication
NGDC Deposited Data
Volcanic rocks
Rift zone
Rift valleys
Volcanic ejecta
BGS Thesaurus of Geosciences
2022
revision
NGDC Deposited Data
dataCentre
NERC_DDC
otherRestrictions
no limitations
The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
otherRestrictions
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.
Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"
English
geoscientificInformation
British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus
1979
creation
Main Ethiopian Rift [id=985019]
37.7000
39.8000
7.0000
9.0000
2015-10-08
2017-03-17
Lead grant NE/L013932/1
MS Excel
http://www.bgs.ac.uk/services/ngdc/accessions/index.html#item107289
download
dataset
dataset
INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology
2011
publication
See the referenced specification
false
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
2010-12-08
publication
See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
false
Tephra samples were manually crushed, wet-sieved at 80 µm to remove alteration products, and dried at 50 °C. Ash shards were mounted in EpoFix resin and polished. Glass major element analyses was carried out by Electron Microprobe Analysis using a 4-spectrometer JEOL JXA-8600 Superprobe, with an accelerating voltage of 15 kV, a defocused beam of 10 (or 5) µm, and 6 (or 4) nA beam current. Elements were counted on-peak for 30 s (Si, Al, Fe, Ti, Mg, Ca, K), except for Na (12 s, analysed first), P (60 s), Mn and Cl (50 s). Off-peak background counting times were half the peak counting times. Data quality was continuously monitored by secondary glass standard analyses. Thirty individual points were attempted per sample. Only analyses with totals above 90 wt% were retained.