Gas composition in headspace of borehole NB04, Cambodia, southeast of Phnom Penh, 2019 - 2020

Data on gas composition in headspace of borehole NB04. Contains 11 columns of data taken from the headspace of borehole NB04 (at the clay-dominated site) using a GasClam 2.0 (Salamander Group, UK) that continuously measure temperature, atmospheric pressure, borehole pressure, and the percentage of carbon dioxide, oxygen, and methane in the borehole. All data collection for the GOAM project was performed on the same sites located in the Kien Svay district of northern Kandal Province, Cambodia, southeast of Phnom Penh. These sites are referred to as "clay-dominated" and "sand-dominated" in reference to the known lithology and are known for high arsenic concentrations (Richards et al., 2017). Each site contained four 18 m boreholes installed in January 2019 using manual drilling described in Richards et al (2015), spaced evenly about ~1.5 m apart. The boreholes that were located at the clay-dominated site are referred to NB01, NB02, NB03 and NB04. The boreholes that were located at the sand-dominated site are referred to as NB05, NB06, NB07 and NB08. The data taken are from the headspace of borehole NB04 (at the clay-dominated site) This file contains part of the data produced for NERC grant NE/P01304X/1 - called Genetic and molecular basis of organic-arsenic-microbe interactions in arsenic prone aquifers ("GOAM") project. References: Richards, L. A., Lapworth, D. J., Magnone, D., Gooddy, D. C., Chambers, L., Williams, P. J., van Dongen, B. E., Polya, D. A. Dissolved Organic Matter Tracers Reveal Contrasting Characteristics across High Arsenic Aquifers in Cambodia: A Fluorescence Spectroscopy Study. Geoscience Frontiers 2019, 10 (5), 1653-1667. Richards, L. A., Magnone, D., Sovann, C., Kong, C., Uhlemann, S., Kuras, O., van Dongen, B. E., Ballentine, C. J., Polya, D. A. High Resolution Profile of Inorganic Aqueous Geochemistry and Key Redox Zones in an Arsenic Bearing Aquifer in Cambodia. Science of The Total Environment 2017, 590-591, 540-553. Richards, L. A., Magnone, D., van Dongen, B. E., Ballentine, C. J., Polya, D. A. Use of Lithium Tracers to Quantify Drilling Fluid Contamination for Groundwater Monitoring in Southeast Asia. Applied Geochemistry 2015, 63, 190-202.

Date (Creation): 2024-08-26

Citation identifier: http://data.bgs.ac.uk/id/dataHolding/13608273

Point of contact

Organisation name	Individual name	Electronic mail address	Role
University of Manchester	Prof David Polya	not available	Originator
University of Manchester	Prof Jonathan Lloyd	not available	Originator
University of Manchester	Dr Naji Bassil	not available	Originator
University of Manchester	Bart van Dongen	not available	Originator
Swedish University of Agricultural Sciences	Oliver Charles Moore	not available	Originator
University of Manchester	Laura A Richards	not available	Originator
Royal University of Agriculture	Chivuth Kong	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

Methane
Arsenic
Groundwater
Gases
NGDC Deposited Data

dataCentre

NGDC Deposited Data

Keywords

NERC_DDC

Access constraints: Other restrictions

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]"

Language: English

Topic category

Geoscientific information

Begin date: 2019-03-19

End date: 2020-01-27

Reference System Information

No information provided.

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#item186114	Data

OnLine resource

Protocol	Linkage	Name
	https://doi.org/10.5285/6e7552ec-1636-4e0e-9531-1ba8d958a856	Digital Object Identifier (DOI)

Hierarchy level: Non geographic dataset

Other: non geographic 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: Tab “GasClam_ClaySite” contains 11 columns of data taken from the headspace of borehole NB04 (at the clay-dominated site) using a GasClam 2.0 (Salamander Group, UK) that continuously measure temperature, atmospheric pressure, borehole pressure, and the percentage of carbon dioxide, oxygen, and methane in the borehole. Divers that continuously measure pressure, temperature, and electrical conductivity (CTD-Diver, Schlumberger Water Services) were suspended from the GasClam unit to a depth of 15 m relative to the top of the well casing and set to record at 60 min intervals. Water-level measurements were corrected for barometric pressure collected from the GasClam units using Diver Office (Version 2012.1, Schlumberger Water Services). Groundwater data were calibrated with reference to the Mekong River Commission elevation datum at the Monitoring Station Phnom Penh Chaktomuk (Bassac).