4e2478ca-572d-2d8b-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/13607144
Foraminifera-based data spanning several tephra horizons in cores from IODP Leg 350, sites U1436 and U1437 (NERC grant NE/M005232/1)
2017-04-16
creation
http://data.bgs.ac.uk/id/dataHolding/13607144
The dataset worksheet contains a list of core samples taken during IODP Exp 350 and foraminifera-based data for selected samples. The work was started with the aim of reconstructing palaeoproductivity changes (namely surface-to-deep carbon isotope gradients and U/Ca measurements) over tephra layers in order to test the ‘ash fertilisation hypothesis’. However, the work has been temporarily halted given the on-board volcanologists ongoing concerns that the ash layers in the selected cores have been reworked and therefore are not primary. Because of the induration and silicification of the core samples at quite shallow depths in the core, the other aim of the project (to reconstruct palaeoceanographic changes from 16-0 Ma) was not possible. The spreadsheet contains a full list of samples and a list of samples that have been examined and analysed. The data worksheet contains the no. of Globigerinoides ruber (with weight), Oridorsalis umbonatus, Uvigerina spp. and Cibicidoides spp. specimens for specific samples. For selected samples, stable oxygen and carbon isotopes are given and a graph of the carbon isotopes vs depth in core is presented.
Professor Carrie Lear
University of Cardiff
School of Earth and Ocean Sciences
Main Building
Cardiff
CF10 3AT
not available
pointOfContact
Dr. Eleanor John
University of the South Pacific
School of Geography, Earth Science and Environment
Laucala Campus
Suva
Fiji
not available
pointOfContact
notApplicable
https://resources.bgs.ac.uk/images/geonetworkThumbs/4e2478ca-572d-2d8b-e054-002128a47908.png
Geology
GEMET - INSPIRE themes, version 1.0
2008-06-01
publication
Stable isotopes
Volcanic ejecta
NGDC Deposited Data
Benthonic foraminifera
Planktonic foraminifera
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.
The dataset is made available to external clients under BGS Digital Data Licence terms and conditions. Revert to the IPR Section (iprdigital@bgs.ac.uk) if further advice is required with regard to permitted usage.
English
geoscientificInformation
British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus
1979
creation
IZU-BONIN ARC [id=926430]
140.2700
140.4700
32.2900
32.4900
2014-04
2014-05
Excel
http://www.bgs.ac.uk/services/ngdc/accessions/index.html#item75489
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
The cores were extracted on board the JOIDES Resolution in April and May 2014. Dr E John selected a 2x2 cm sample over selected intervals spanning both mafic and felsic tephra layers in cores U1437B and U1436A. At Cardiff University, selected samples were subjected to the following procedure: 1. Samples were soaked in distilled water overnight and gently disaggregated using fingertips. All samples were easy to disaggregate and did not require the use of detergent. 2. Samples were then wet-sieved through a 63-µm mesh and the coarse fraction was dried in an oven at 60°C, and weighed. 3. The sample was then dry-sieved to extract the 250-355 µm size fraction, which was used for foraminifera picking. 4. In each examined split, specimens of G. ruber, O. umbonatus, Uvigerina spp., and Cibicidoides spp. were picked using a fine paintbrush and then stored in micropalaeontological slides. 5. Those required for analysis were ultrasonically-cleaned and split open using a cleaned glass slide. Any adhering organic matter or silicate was removed using a fine paintbrush. The samples were then ultrasonically cleaned in 18ΩM water and left to dry in polypropylene microcentrifuge tubes. 6. Samples were then weighed into tin cups and placed into acid-cleaned tubes for stable isotope analysis which was performed on a Thermo MAT 253 with Kiel IV carbonate preparation device.