335a4989-dcf2-faf7-e063-3050940a544c English dataset British Geological Survey +44 115 936 3100 Environmental Science Centre,Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk pointOfContact 2026-05-06 UK GEMINI 2.3 http://data.bgs.ac.uk/id/dataHolding/13608403 WGS 84 (EPSG::4326) Lithium isotope ratios of sampled Precambrian and Paleozoic Mudrocks 2025-03-05 creation http://data.bgs.ac.uk/id/dataHolding/13608403 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. William McMahon University of Cambridge not available originator Enquiries British Geological Survey United Kingdom not available distributor Enquiries British Geological Survey United Kingdom not available pointOfContact notApplicable https://resources.bgs.ac.uk/images/geonetworkThumbs/335a4989-dcf2-faf7-e063-3050940a544c.png Geology GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Isotope ratio Proterozoic Lithium isotopes BGS Thesaurus of Geosciences 2022 revision NGDC Deposited Data dataCentre NERC_DDC otherRestrictions licenceOGL Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" 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. Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" English geoscientificInformation ISO 3166_1 alpha-3 2009 revision ENG British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation ENGLAND [id=150000] British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation NEW BRUNSWICK [id=747400] British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation NOVA SCOTIA [id=747600] British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation SCOTLAND [id=140000] ISO 3166_1 alpha-3 2009 revision SCT British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation WALES [id=170000] ISO 3166_1 alpha-3 2009 revision WLS -69.0700 1.7500 43.4000 58.6000 2021-09-01 2024-09-02 Microsoft Excel witheld Enquiries British Geological Survey United Kingdom not available distributor https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item187062 WWW:DOWNLOAD-1.0-http--download Data 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 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.