Date ( Creation )

2018-03-07

Identifier

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

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

N

S

E

W

Distribution format

• ()

OnLine resource

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

Hierarchy level

dataset Dataset

Other

dataset

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.

gmd:MD_Metadata

File identifier

6802a597-6dc8-06e3-e054-002128a47908   XML

Metadata language

English English

Hierarchy level

dataset Dataset

Date stamp

2021-02-25

Metadata standard version

2.3

Dataset URI

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