Identification

Title

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

Abstract

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).

Resource type

dataset

Resource locator

https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item165245

name: Data

function: download

https://doi.org/10.1038/s41561-018-0216-3

name: Published Paper

function: information

https://doi.org/10.1126/sciadv.aaz6446

name: Published Paper

function: information

https://doi.org/10.1130/B31300.1

name: Published Paper

function: information

Unique resource identifier

code

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

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

Biomarkers

Nitrogen

Hydrogen isotopes

Alkanes

Soils

Nitrogen isotopes

Carbon isotopes

originating controlled vocabulary

title

reference date

date type

revision

effective date

2011

Keyword set

keyword value

NERC_DDC

Geographic location

West bounding longitude

169.0200

East bounding longitude

171.8800

North bounding latitude

-42.5500

South bounding latitude

-44.4900

Extent

Extent group

authority code

title

reference date

date type

creation

effective date

1979

code identifying the extent

NEW ZEALAND [id=590000]

Extent group

authority code

title

reference date

date type

revision

effective date

2009

code identifying the extent

NZ

Extent group

authority code

title

reference date

date type

revision

effective date

2009

code identifying the extent

NZL

Extent group

authority code

title

reference date

date type

creation

effective date

1979

code identifying the extent

SOUTH ISLAND [id=594000]

Extent group

authority code

title

reference date

date type

creation

effective date

1979

code identifying the extent

WESTLAND* [id=594400]

Temporal reference

Temporal extent

Begin position

2014-09-01

End position

2019-12-31

Dataset reference date

date type

creation

effective date

2021-04-27

Frequency of update

notApplicable

Quality and validity

Lineage

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.

Conformity

Conformity report

specification

title

reference date

date type

publication

effective date

2011

degree

false

explanation

See the referenced specification

Conformity report

specification

title

reference date

date type

publication

effective date

2010-12-08

degree

false

explanation

See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF

Data format

name of format

MS Excel

version of format

Constraints related to access and use

Constraint set

Limitations on public access

Constraint set

Limitations on public access

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.

Responsible organisations

Responsible party

organisation name

University of Durham

full postal address

Department of Geography, South Road

Durham

DH1 3LE

email address

not available

responsible party role

originator

Responsible party

organisation name

University of Durham

full postal address

Department of Geography, South Road

Durham

DH1 3LE

email address

not available

responsible party role

principalInvestigator

Responsible party

organisation name

British Geological Survey

email address

not available

responsible party role

distributor

Responsible party

organisation name

British Geological Survey

email address

not available

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact

organisation name

British Geological Survey

full postal address

Environmental Science Centre,Keyworth

NOTTINGHAM

NG12 5GG

United Kingdom

telephone number

+44 115 936 3100

email address

enquiries@bgs.ac.uk

responsible party role

pointOfContact

Metadata date

2022-06-21

Metadata language