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.

Citation proposal
. IODP Expedition 352 (Bonin Forearc) Pb isotope data (NERC grant NE/M012034/1). https://metadata.bgs.ac.uk/geonetwork/srv/api/records/6802a597-6dc8-06e3-e054-002128a47908

Simple

Date ( Creation ): 2018

Identifier: http://data.bgs.ac.uk/id/dataHolding/13607289

Point of contact

University of Cardiff - Professor Julian Pearce (School of Earth and Ocean Sciences )

Main Building Cardiff CF10 3AT

Maintenance and update frequency: notApplicable notApplicable

GEMET - INSPIRE themes

Geology

BGS Thesaurus of Geosciences

Andesite , Basement , Lead isotopes , Isotope ratio , Submarine trenches , Lead ratio , Basalt

Keywords

NERC_DDC

Access constraints: otherRestrictions Other restrictions

Use constraints: otherRestrictions Other restrictions

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]"

Metadata language: English English

Topic category

Geoscientific information

Geographic identifier

BONIN TRENCH [id=926400]

Date ( Creation ): 1979

Reference system identifier

OGP / GEOG

Date ( Revision ): 2005

Distribution format

()

OnLine resource: http://www.bgs.ac.uk/services/ngdc/accessions/index.html#item107689

Hierarchy level: dataset Dataset

Other: dataset

Conformance result

Date ( Publication ): 2011

Explanation: See the referenced specification

Pass: false

Conformance result

Date ( Publication ): 2010-12-08

Explanation: See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF

Pass: false

Statement: 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.