Data Publication

Terrestrial palaeo-environmental proxy data of the Upper Pliensbachian, Mochras Borehole sediments, deposited in the Cardigan Bay Basin, Wales

Hollaar, Teuntje

NERC EDS National Geoscience Data Centre

(2021)

Descriptions

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.

Keywords

Originally assigned keywords

charcoal

Palynofacies

clay mineralogy

X-ray fluoresence

mass spectrometry

bulk organic carbon isotopes

Corresponding MSL vocabulary keywords

x-ray fluorescence spectrometer

MSL enriched keywords

equipment

x-ray spectrometer

x-ray fluorescence spectrometer

Phanerozoic

Mesozoic

Jurassic

Lower/EarlyJurassic

Pliensbachian

minerals

chemical elements

carbon

silicate minerals

phyllosilicates

clay

unconsolidated sediment

clastic sediment

clay

measured property

carbon (C)

organic carbon

total organic carbon

Technique

imaging (3D)

computed tomography (CT)

X-ray diffraction

MSL enriched sub domains i

geochemistry

microscopy and tomography

Source

https://www2.bgs.ac.uk/nationalgeosciencedatacentre/citedData/catalogue/d6b7c567-49f0-44c7-a94c-e82fa17ff98e.html

Source publisher

NERC EDS National Geoscience Data Centre

DOI

10.5285/d6b7c567-49f0-44c7-a94c-e82fa17ff98e

Creators

Hollaar, Teuntje

Contributors

Deconinck , Jean-Francois

Other

University of Burgundy

:

Citation

Hollaar, T. (2021). Terrestrial palaeo-environmental proxy data of the Upper Pliensbachian, Mochras Borehole sediments, deposited in the Cardigan Bay Basin, Wales [Data set]. NERC EDS National Geoscience Data Centre. https://doi.org/10.5285/D6B7C567-49F0-44C7-A94C-E82FA17FF98E

Dates

Submitted:

2021-10-12

Funding References

Funder name: Natural Environment Research Council

Funder identifier: https://doi.org/10.13039/501100000270

Funder identifier type: Crossref Funder ID

Award number: NE/N018508/1

Award title: Integrated Understanding of the Early Jurassic Earth System and Timescale (JET)

Geo location(s)

Cardigan Bay coast, North Wales