Carbon dioxide flux and isotopic composition from sedimentary rock weathering, Waiapu River catchment, New Zealand

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).

Date (Creation): 2022-05-24

Citation identifier: http://data.bgs.ac.uk/id/dataHolding/13607943

Point of contact

Organisation name	Individual name	Electronic mail address	Role
IFREMER	Guillaume Soulet	not available	Originator
NERC Radiocarbon Facility	Mark Garnett	not available	Originator
University of Oxford	Robert Hilton	not available	Originator
University of Durham	Tobias Roylands	not available	Originator
British Geological Survey	Enquiries	not available	Distributor
British Geological Survey	Enquiries	not available	Point of contact

Maintenance and update frequency: notApplicable

GEMET - INSPIRE themes, version 1.0

Geology

BGS Thesaurus of Geosciences

Carbon isotopes
Carbon dioxide
Sedimentary rocks
Weathering
NGDC Deposited Data

dataCentre

NGDC Deposited Data

Keywords

NERC_DDC

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Other constraints: licenceOGL

Other constraints: Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Use constraints: 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]"

Spatial representation type: Vector

Language: English

Topic category

Geoscientific information

Geographic identifier: NEW ZEALAND [id=590000]
British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation

Geographic identifier: NZ
ISO 3166_1 alpha-2 2009 revision

Geographic identifier: NZL
ISO 3166_1 alpha-3 2009 revision

Begin date: 2018-04-29

End date: 2018-05-05

Unique resource identifier: WGS 84 (EPSG::4326)

Distribution format

Name	Version
MS Excel

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
British Geological Survey	Enquiries	not available	Distributor

OnLine resource

Protocol	Linkage	Name
	https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item173494	Data

OnLine resource

Protocol	Linkage	Name
	https://doi.org/10.5285/467fcf54-eb20-4a19-a62d-8867516de87c	Digital Object Identifier (DOI)

OnLine resource

Protocol	Linkage	Name
	https://doi.org/10.1016/j.chemgeo.2022.121024	Published Paper

Hierarchy level: Dataset

Other: dataset

Conformance result

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

Date (Publication): 2011

Explanation: See the referenced specification

Pass: No

Conformance result

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

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: No

Statement: 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.