Identification

Title

Lithium isotope ratios of sampled Precambrian and Paleozoic Mudrocks

Abstract

Geochemical measurements which quantify the lithium isotope ratios (d7Li) of Paleozoic (541–251 Mya) mudstones. Samples were obtained from various field locations across Scotland, Wales, England and New Brunswick, Nova Scotia, Canada. Sampled mudstones are listed under their formation name, with information on the locations of each outcrop belt and further details on lithological characteristics, including environment of formation, freely available on the British Geological Survey Lexicon of named rock units (https://www.bgs.ac.uk/technologies/the-bgs-lexicon-of-named-rock-units/) and Government of Canada weblex (https://weblex.canada.ca/weblexnet4/weblex_e.aspx), for UK and Canadian samples, respectively. Stratigraphic age is given in accordance to the GSA geological timescale v.5.0. Following sampling, specific methodologies for preparation for Lithium isotope analysis are provided in the Metadata Lineage. The data was collected to understand changes in weathering intensity coeval with the Paleozoic expansion of land plants, with lithium isotopes a powerful trace for silicate weathering as they are sensitive to the balance between rock dissolution and clay formation. The tabulated lithium isotope ratios were compared at different temporal stages of plant evolution through the Paleozoic. Samples were collected by the University of Cambridge. Lithium isotope ratios were obtained by William McMahon and supervised by Edward Tipper and Mohd Tarique. Mass spectrometry was carried out by William McMahon and David Wilson at University College London.

Resource type

dataset

Resource locator

https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item187062

name: Data

function: download

Unique resource identifier

code

http://data.bgs.ac.uk/id/dataHolding/13608403

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

originating controlled vocabulary

title

GEMET - INSPIRE themes, version 1.0

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

Isotope ratio

Proterozoic

Lithium isotopes

NGDC Deposited Data

originating controlled vocabulary

title

BGS Thesaurus of Geosciences

reference date

date type

revision

effective date

2022

Keyword set

keyword value

Keyword set

keyword value

NERC_DDC

Geographic location

West bounding longitude

-69.0700

East bounding longitude

1.7500

North bounding latitude

58.6000

South bounding latitude

43.4000

WLS

Temporal reference

Temporal extent

Begin position

2021-09-01

End position

2024-09-02

Dataset reference date

date type

creation

effective date

2025-03-05

Frequency of update

notApplicable

Quality and validity

Lineage

The weathered edges of the sampled mudrocks were cut, leaving only fresh faces. Sample was ground in a ball mill. 1 gram of sample was weighed. Sample was placed in an oven for 2 hours at 100 degrees Celsius. Sample was weighed (the pre-loss of ignition weight). Loss of ignition was conducted by placing sample in a titanium crucible in a furnace at 500 degrees Celsius for 420 minutes. The sample was reweighed. The sample was digested in HF acid. The sample was analysed for major elements on an Agilent 5100, with the Lithium concentration obtained. The sample was dried and dissolved in 200 microliter of 0.7M HCL acid. Lithium columns were prepared - 25cm in height with 4mm in diameter). The sample was pipetted through the column. The sample was analyzed for it's Lithium 6/Lithium 7 ratios (d7Li) on a mass spectrometer.

Conformity

Conformity report

specification

title

INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology

reference date

date type

publication

effective date

2011

degree

false

explanation

See the referenced specification

Conformity report

specification

title

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

reference date

date type

publication

effective date

2010-12-08

degree

false

explanation

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

Data format

name of format

MS Excel

version of format

Constraints related to access and use

Constraint set

Limitations on public access

Constraint set

Limitations on public access

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.

pointOfContact

Metadata on metadata

Metadata point of contact

organisation name

British Geological Survey

full postal address

Environmental Science Centre,Keyworth

NOTTINGHAM

NG12 5GG

United Kingdom

telephone number

+44 115 936 3100

email address

enquiries@bgs.ac.uk

responsible party role

pointOfContact

Metadata date

2025-06-01

Metadata language

eng