e114b1d2-e7df-05fa-e053-0937940a4f86 English dataset British Geological Survey +44 115 936 3100 Environmental Science Centre,Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk pointOfContact 2026-05-02 UK GEMINI 2.3 http://data.bgs.ac.uk/id/dataHolding/13607943 WGS 84 (EPSG::4326) Carbon dioxide flux and isotopic composition from sedimentary rock weathering, Waiapu River catchment, New Zealand 2022-05-24 creation http://data.bgs.ac.uk/id/dataHolding/13607943 These data were collected to study oxidative weathering processes in the Waiapu River catchment, New Zealand, with potential carbon release sourced from the oxidation of petrogenic organic carbon or carbonate dissolution coupled to the oxidation of sulfide minerals. There, in mudstones exposed in a highly erosive gully complex, in situ CO2 emissions were measured with drilled gas accumulation chambers following the design by Soulet et al. (2018, Biogeosciences 15, 4087-4102, https://doi.org/10.5194/bg-15-4087-2018). Temporal and spatial variability in CO2 flux can be put in context with environmental changes (e.g., temperature and hydrology). For this, CO2 release from 5 different chambers, which were installed over a transect of ~ 10 m length in a gully above a nearby streambed, was measured several times over a short study period (circa one week). In addition, the gaseous CO2 storage (partial pressure) in the shallow weathering zone was measured prior to a CO2 flux measurement. To understand the source of CO2, gas samples were collected and their stable and radioactive carbon isotope compositions determined. In this process, we identified a contaminant, which was associated with the chamber installation, that can be traced in the gas samples that were collected within 4 days following the installation. Details of the subsequent data analysis and interpretation can be found in: Roylands et al. 2022, Chemical Geology: Capturing the short-term variability of carbon dioxide emissions from sedimentary rock weathering in a remote mountainous catchment, New Zealand. This work was supported by the European Research Council (Starting Grant to Robert G. Hilton, ROC-CO2 project, grant 678779). Guillaume Soulet IFREMER not available originator Mark Garnett NERC Radiocarbon Facility not available originator Robert Hilton University of Oxford Professor of Sedimentary Geology Department of Earth Sciences, South Parks Road Oxford Oxford OX1 3AN not available originator Tobias Roylands University of Durham Research Postgraduate 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/e114b1d2-e7df-05fa-e053-0937940a4f86.png Geology GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Carbon isotopes Carbon dioxide Sedimentary rocks Weathering BGS Thesaurus of Geosciences 2022 revision NGDC Deposited Data Citable 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]" vector English geoscientificInformation British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation NEW ZEALAND [id=590000] ISO 3166_1 alpha-2 2009 revision NZ ISO 3166_1 alpha-3 2009 revision NZL 178.1900 178.2000 -37.8600 -37.8500 2018-04-29 2018-05-05 Microsoft Excel witheld Enquiries British Geological Survey United Kingdom not available distributor https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item173494 WWW:DOWNLOAD-1.0-http--download Data download https://doi.org/10.5285/467fcf54-eb20-4a19-a62d-8867516de87c WWW:LINK-1.0-http--related Citation Information - Digital Object Identifier (DOI) Roylands, T., Hilton, R.G., Garnett, M.H., Soulet, G. (2022). Carbon dioxide flux and isotopic composition from sedimentary rock weathering, Waiapu River catchment, New Zealand. NERC EDS National Geoscience Data Centre. (Dataset). https://doi.org/10.5285/467fcf54-eb20-4a19-a62d-8867516de87c information https://doi.org/10.1016/j.chemgeo.2022.121024 WWW:LINK-1.0-http--related Published Paper information 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 Rock chambers to measure CO2 fluxes were installed following the method of Soulet et al., (2018), Biogeosciences, with each chamber drilled directly into bare mudstones undergoing weathering, using a hand auger. 5 different chambers were installed over a transect of ~ 10 m length in a gully in the Waiapu catchment, New Zealand (37.85986° S, 178.19028° E). CO2 fluxes were measured using an infra-red gas analyser, and a molecular sieve sampling system to trap CO2. Repeatedly measured CO2 fluxes can be compared to changes in environmental conditions, including air and chamber temperatures, rainfall and river flow. Furthermore, the carbon isotopic composition of CO2 was measured by IRMS and AMS for source identification. In this process, a contaminant was identified, which was associated with the chamber installation, that can be traced in the gas samples that were collected within up to 4 days following the installation.