Organic matter composition (isotopic composition and biomarker characterisation) from Lake Paringa and soils from Westland, New Zealand (NERC Grant NE/P013538/1)

The dataset contains geochemical measurements which quantify the amount and source of carbon in organic matter of sediments from Lake Paringa, New Zealand. Measurements were made on a 6 m sediment core collected in 2015 from the lake bed using a Mackereth corer (PA6m1a). The core was correlated to master core PA1 which has a well-established age-depth model based on accelerator mass spectrometry measurements of the radiocarbon (14C) content of terrestrial macrofossils (Howarth et al., 2016). In addition, soil samples were collected using a soil auger from two elevation transects in westland, New Zealand in 2016 and 2017 (from Mt. Fox and Alex Knob). All sediment samples were freeze dried and ground to homogenise them prior to geochemical analyses. Organic carbon concentration (%) and the stable isotopic composition of organic carbon (δ13C) was measured (Frith et al., 2018) following the removal of carbonate minerals (0.25 M hydrochloric acid for 4 hours at approximately 70 °C) by combustion of sediment at 1,020 °C in a Costech Elemental Analyser coupled via a CONFLO III to a Thermo Scientific Delta V Advantage stable isotope mass spectrometer. Total nitrogen content (N, %) and its isotopic composition (δ15N) was measured by combustion of untreated samples in a Costech Elemental Analyser with a CARBOSORB trap to inhibit large CO2 peaks from affecting measurements. A subset of samples were selected for analysis of the radiocarbon activity (14C, reported as F14C) of bulk organic matter by accelerator mass spectrometry after graphitization. A subset of sediment samples from the lake core and soil samples were selected for the analysis of biomarker abundance and their hydrogen isotope composition. We focused on the extraction of n-alkanes from aliquots of lake sediment (~2 g) using established methods (Wang et al., 2020). These measurements are reported in the dataset as the abundance of n-alkanes (chain lengths C21 to C35) in ug/g of sediment (and sum of chain lengths and ratios - carbon preference index). Finally, the dataset includes outputs of organic matter provenance: modelled elevation and depth, as described in Wang et al., (2020). In the datafile, the sample elevation and depth are provided. The labels for data are as follows. For down core sediment samples from Lake Paringa, they are labelled with the core code (PA6m1), and the sampling interval in centimetres (PA6m1_x). Soil samples from an elevation transect from Mt Fox (MF-YY-a) are labelled with a distinct code for each site (YY) and sub-code for each soil depth (a). Soil samples from an elevation transect of Alex Knob (5.Z.z) are labelled based on sub-site (Z) and soil depth (z).
 
Citation proposal
. Organic matter composition (isotopic composition and biomarker characterisation) from Lake Paringa and soils from Westland, New Zealand (NERC Grant NE/P013538/1). https://metadata.bgs.ac.uk/geonetwork/srv/api/records/c1a62e54-49e0-207d-e054-002128a47908

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Date ( Creation )
2021-04-27
Identifier
http://data.bgs.ac.uk/id/dataHolding/13607749

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notApplicable notApplicable
GEMET - INSPIRE themes
  • Geology
BGS Thesaurus of Geosciences
  • Nitrogen , Nitrogen isotopes , Biomarkers , Hydrogen isotopes , Carbon isotopes , Alkanes , Soils
Keywords
  • NERC_DDC
Access constraints
otherRestrictions Other restrictions
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otherRestrictions Other restrictions
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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
textTable Text, table
Metadata language
English English
Topic category
  • Geoscientific information
Geographic identifier
NEW ZEALAND [id=590000]

 

Date ( Creation )
1979

Geographic identifier
NZ

 

Date ( Revision )
2009

Geographic identifier
NZL

 

Date ( Revision )
2009

Geographic identifier
SOUTH ISLAND [id=594000]

 

Date ( Creation )
1979

Geographic identifier
WESTLAND* [id=594400]

 

Date ( Creation )
1979

N
S
E
W


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dataset Dataset
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dataset

Conformance result

Date ( Publication )
2011
Explanation
See the referenced specification
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false

Conformance result

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
false
Statement
For details of sample collection methods for lake sediments and soil samples, and laboratory protocols for measurements of isotopic composition and biomarker characterisation, please see the following publications: Frith et al., 2018, Nature Geoscience, doi:10.1038/s41561-018-0216-3 - available open access here - https://dro.dur.ac.uk/25874/ Wang et al., 2021, Science Advances, doi:10.1126/sciadv.aaz6446, available open access on journal page.

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c1a62e54-49e0-207d-e054-002128a47908   XML
Metadata language
English English
Hierarchy level
dataset Dataset
Date stamp
2021-09-17
Metadata standard version
2.3

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http://data.bgs.ac.uk/id/dataHolding/13607749
 
 

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