IODP Expedition 352 (Bonin Forearc) Pb isotope data (NERC grant NE/M012034/1)
We provide here Pb isotope data for the basement rocks cored during IODP Expedition 352 (Bonin Forearc). The data are reported as 206Pb/204Pb, 207Pb/204Pb and 208Pb/204Pb ratios together with their errors. The overall accuracy of the data was determined using international standard NBS SRM 981. Values for this standard achieved during the measurement period were 206Pb/204Pb = 16.9404 ±32,207Pb/204Pb = 15.4969 ±32, 208Pb/204Pb = 36.7149 ±90 (2sd; n=44). The data are separated into four parts one for each drill site that cored basement. Sites 1440B and 1441A both sampled a basalt type known as FAB (Forearc Basalts), whereas Sites 1439C and 1442A both sampled boninites (Mg-rich andesites). Both rock types are typical of the forearc setting and contain information needed to understand the process of subduction initiation. A summary of the Expedition, and hence the petrography and setting of the samples as well as the various scientific objectives for the project to which these analyses contribute) may be found in: Reagan, M.K., Pearce, J.A., and Petronotis, K., Expedition Scientists, 2015, Izu-Bonin-Mariana Fore Arc: Proceedings of the International Ocean Discovery Program, 352. International Ocean Discovery Program, http://dx.doi.org/10.14379/iodp.proc.352.2015.
dataset
http://www.bgs.ac.uk/services/ngdc/accessions/index.html#item107689
function: download
http://data.bgs.ac.uk/id/dataHolding/13607289
eng
geoscientificInformation
publication
2008-06-01
Basalt
Lead ratio
Isotope ratio
Submarine trenches
Andesite
Lead isotopes
Basement
revision
2011
NERC_DDC
142.6000
142.7600
28.4600
28.4000
creation
1979
BONIN TRENCH [id=926400]
2014-07-30
2016-12-31
creation
2018-03-07
notApplicable
Rocks were prepared by initially crushing inside a plastic envelope using a non-torque press. Crushed material was then separated to 0.5-1.0 mm using a Teflon sieve set. This fraction was repeatedly cleaned with in ultra-pure water in an ultra-sonic bath. Cleaned rock-chips were then picked during a microscopic examination. Samples were leached for 30-40 min in 4M HCl at 200°C prior to Pb separation using HBr-HCl anion exchange columns. Lead isotope ratios were measured by a Thermo Neptune MC-ICP-MS at the University of Southampton UK, using a double spike run of each sample to correct for instrumental mass fractionation. A 207Pb-204Pb SBL74 spike was added such that 204Pbsample/204Pbspike was 0.09±0.03. Procedural blanks range between 30-95 pg Pb. Propagated uncertainty for combined natural sample and spiked sample analyses were always less than reproducibility 2sd of NBS SRM 981.
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
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.
School of Earth and Ocean Sciences
University of Cardiff
Main Building
Cardiff
CF10 3AT
pointOfContact
British Geological Survey
Environmental Science Centre,Keyworth
NOTTINGHAM
NG12 5GG
United Kingdom
+44 115 936 3100
pointOfContact
2023-01-23