cb799ce3-e1e3-40c6-e054-002128a47908
English
dataset
British Geological Survey
+44 115 936 3100
Environmental Science Centre,Keyworth
NOTTINGHAM
NOTTINGHAMSHIRE
NG12 5GG
United Kingdom
enquiries@bgs.ac.uk
pointOfContact
2022-09-27
UK GEMINI
2.3
http://data.bgs.ac.uk/id/dataHolding/13607798
Clay Mineralogy of Miocene to recent sediments collected at Site U1521 during International Ocean Discovery Programme (IODP) Expedition 374 to the Ross Sea, Antarctica
2021-05-19
creation
http://data.bgs.ac.uk/id/dataHolding/13607798
This dataset comprises 35 samples analysed for clay mineralogy from IODP Expedition 374 Site U1521 to the Ross Sea, collected on the RV JOIDES Resolution. Shipboard biostratigraphy and magnetostratigraphy suggests the samples are mainly early Miocene in age (McKay et al., 2019, Proceedings of the International Ocean Discovery Program). The uppermost samples do, however, include younger Plio-Pleistocene sediments.
James Marschalek
Imperial College London
Research Postgraduate
Royal School of Mines, Prince Consort Road
London
SW7 2BP
not available
originator
Viviane Bout-Roumazeilles
University of Lille
not available
originator
Francois Beny
University of Lille
not available
owner
Enquiries
British Geological Survey
not available
distributor
Enquiries
British Geological Survey
not available
pointOfContact
notApplicable
https://resources.bgs.ac.uk/images/geonetworkThumbs/cb799ce3-e1e3-40c6-e054-002128a47908.png
Geology
GEMET - INSPIRE themes
2008-06-01
publication
Sedimentary history
Miocene
Provenance
Clay mineralogy
BGS Thesaurus of Geosciences
2011
revision
NERC_DDC
otherRestrictions
restricted
The dataset has been formally approved by BGS for access by external clients under a BGS Digital Data Licence, issued via BGS's IPR Section. The dataset must not be provided to, or be accessible by, an external client until the IPR Section confirms that signed licence documentation is in place. Refer to the IPR Section (DigitalLE@bgs.ac.) if further advice is required.. Constraint applies until 2022-12-31
otherRestrictions
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.
Either: (i) the dataset is made freely available, e.g. via the Internet, for a restricted category of use (e.g. educational use only); or (ii) the dataset has not been formally approved by BGS for access and use by external clients under licence, but its use may be permitted under alternative formal arrangements; or (iii) the dataset contains 3rd party data or information obtained by BGS under terms and conditions that must be consulted in order to determine the permitted usage of the dataset. Refer to the BGS staff member responsible for the creation of the dataset if further advice is required. He / she should be familiar with the composition of the dataset, particularly with regard to 3rd party IPR contained in it, and any resultant use restrictions. This staff member should revert to the IPR Section (ipr@bgs.ac.uk) for advice, should the position not be clear.
vector
English
geoscientificInformation
British Geological Survey Gazetteer: Gazetteer of sea areas
2010
revision
ROSS SEA [id=2001391]
-179.6700
-179.6800
-75.6800
-75.6700
2019-09
2019-11
csv file
Enquiries
British Geological Survey
not available
distributor
https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item166006
Data
download
https://doi.org/10.5285/b3cb3574-49b0-44c8-a934-3da88ca4ef93
Digital Object Identifier (DOI)
information
dataset
dataset
INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology
2011
publication
See the referenced specification
false
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
2010-12-08
publication
See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
false
Samples were first decarbonated using 0.1N HCl and deflocculated through repeated washing using pure water. To isolate the clay-size fraction (<2 µm), differential settling was employed according to Stoke’s Law and then the sample was concentrated using a centrifuge for 40 minutes at 3500 rotations per minute. An aliquot was then placed on glass slides, before X-ray diagrams were obtained using a Bruker D4Endeavor (standard 30 kV and 30 mA). Each sample was run between 2.49 and 32.5°2θ with a step size of 0.08°2θ (total of 369 steps) and integration time of one second. Sample were run in three different ways: 1) air-dried, 2) glycolated (12 hours in ethylene glycol), and 3) heated at 490°C for 2 hours . The relative fraction of smectite, chlorite, illite and kaolinite is determined using the main X-ray diffraction peaks (layer and interlayer) on X-ray spectra according to their crystallographic characteristics (Beny et al., 2020, QSR). Illite is readily identified using its main peak at 10 Å on all three runs. Smectite is characterized by a main peak at 14-15 Å on the air-dried samples that expands at 17 Å after ethylene glycol saturation and collapses at 10 Å with increasing heating. Kaolinite and chlorite both have a dominant peak at 7-7.2 Å, with pseudo-void deconvolution of the kaolinite/chlorite doublet at 3.54/3.58 Å required to distinguish between them. All measurements and semi-quantitative estimations are processed using the MacDiff software (Petschick, 2004). To distinguish between Fe/ Mg-rich vs Al-rich illite, the Esquevin index was also employed (Esquevin, 1969), which corresponds to the ratio between the intensity of the peak of illite at 5 Å and at 10 Å (illite 5Å/10Å). The crystallinity of illite was measured using the method of integral breadth (Petschick et al., 1996, Marine Geol.), with high crystallinity implying poorly crystallized mineral.