Terrestrial palaeo-environmental proxy data of the Upper Pliensbachian, Mochras Borehole sediments, deposited in the Cardigan Bay Basin, Wales (NERC Grant NE/N018508/1)
Terrestrial palaeo-environmental proxy data has been collected to examine orbital changes in wildfire activity in the Early Jurassic of the Mochras Borehole, Cardigan Bay Basin, Wales. To do this a high resolution charcoal abundance dataset was created and quantified in two size fractions, microscopic charcoal (10-125 µ) and macroscopic charcoal (>125 µ). To take potential changes in riverine influx and/or organic preservation in account on the charcoal abundance, palynofacies were analysed to document all terrestrial and marine organic particles present in the samples, and next to this, X-ray fluorescence data was gathered to assess detrital output. Mass spectrometry provided information on the carbonate and Total Organic Carbon content and bulk organic carbon isotopes. This information was used to look at changes in the lithology and the carbon cycle. Finally, clay mineralogical data was obtained to look at changes in the hydrological cycle in relation to wildfire activity. This dataset spans 951-934 mbs from the Mochras borehole, which is the time equivalent of ~350 kyr, in the Margaritatus Zone of the Upper Pliensbachian. The Mochras sediments have been deposited in the Cardigan Bay Basin, Wales. At the time of deposition, this location was positioned in the Laurasian Seaway at a paleolatitude of ~35°N. These datasets were obtained at a high resolution (10 cm) using X-ray diffraction, X-ray fluorescence, mass spectrometry and palynological preparations. This high resolution was acquired to analyse the presence of precessional orbital forcing on wildfire and the other proxy datasets. This data was collected, interpreted and analysed by Teuntje Hollaar, Claire Belcher, Stephen Hesselbo, Micha Ruhl, Jean-Franҫois Deconinck, Sarah Jane Baker and Luke Mander. The complete dataset presented in the published article file ‘Wildfire activity enhanced during phases of maximum orbital eccentricity and precessional forcing in the Early Jurassic’ has been included in this data file.
nonGeographicDataset
https://doi.org/10.5285/d6b7c567-49f0-44c7-a94c-e82fa17ff98e
name: Digital Object Identifier (DOI)
function: information
https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item169090
name: Data
function: download
http://data.bgs.ac.uk/id/dataHolding/13607834
eng
geoscientificInformation
publication
2008-06-01
Charcoal
X ray diffraction
TOC
Clay mineralogy
X ray fluorescence spectroscopy
Mass spectroscopy
Jurassic
Carbonates
revision
2011
NERC_DDC
2017-12-01
2020-02-01
creation
2021-10-12
notApplicable
XRD Powdered bulk rock samples were decarbonated with a 0.2 M HCl solution. The clay size fraction was extractedand analysed by X-ray diffraction. The clay phases were discriminated in three runs per sample: 1) air-drying at room temperature; 2) ethylene-glycol solvation during 24 hours; 3) heating at 490°C during 2 hours. XRF Elemental concentrations were obtained by automated X-ray XRF analyses were conducted with the ITRAX MC, with a 30-sec measurement window. Long-term drift in the measurement values was counteracted by regular internal calibration with a glass reference. Additionally, every 5 metre, a 30 cm interval was duplicated. Mass spectrometry Powdered bulk rock samples were decarbonized using 3.3% HCl and given a hot bath of 79°C for 1 h to remove siderite and dolomite. The neutralized samples were weighted in tin capsules for mass spectrometry.
publication
2011
false
See the referenced specification
publication
2010-12-08
false
See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
MS Excel
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.
Camborne School of Mines
University of Exeter
Penryn Campus
Penryn
TR10 9FE
principalInvestigator
PhD student
University of Exeter
Laver Building, North Park Road
Exeter
EX4 4QE
originator
British Geological Survey
distributor
British Geological Survey
pointOfContact
British Geological Survey
Environmental Science Centre,Keyworth
NOTTINGHAM
NG12 5GG
United Kingdom
+44 115 936 3100
pointOfContact
2023-01-23