58ea67fb-00f4-c6e8-e063-3050940a8f51 English dataset British Geological Survey +44 115 936 3100 United Kingdom enquiries@bgs.ac.uk pointOfContact 2026-08-25 UK GEMINI 2.3 http://data.bgs.ac.uk/id/dataHolding/13608759 WGS 84 (EPSG::4326) Physical property model data for the response of deep-sea sediment to the 1979 test mining disturbance at the Ocean Minerals Company (OMCO) mining site in the Clarion-Clipperton Zone of the Central Pacific Ocean (Expedition JC241 in 2023) 2026-08-11 creation http://data.bgs.ac.uk/id/dataHolding/13608759 This dataset consists of the data generated from the physical property analysis of sediment to model the physical and temporal response of deep-sea sediment to the compression caused by a deep-sea mining vessel. The results were generated from seafloor sediment samples collected as part of the Seabed Mining And Resilience To EXperimental impact (SMARTEX) Highlight Topic project funded by the UK Natural Environment Research Council (Grant References NE/T003537/1 and NE/T002883/1) alongside other partner institutions in the project. The tests were conducted to evaluate the consolidation behaviour, compressibility, and void ratio evolution of the material under controlled laboratory conditions representative of the expected in-situ response. The dataset consists of two one-dimensional consolidation experiments conducted on frozen seafloor sediment using an automated oedometer apparatus in the Soil Testing Laboratory at the British Geological Survey, Keyworth, UK. The results are provided in Microsoft Excel csv spreadsheets and have an accompanying data report detailing the methodology and csv outputs. Additional related datasets associated with this project are [1] porewaters extracted for trace metals, nutrients and alkalinity and sediments analysed for trace element geochemistry, loss on drying, particle size analysis and bulk and clay mineralogy by XRD and [2] laser ablation ICP-MS line transects performed across selected entire manganese nodules for high resolution, in-situ geochemical analysis. The samples were collected as part of Expedition JC241 2023 in the Ocean Minerals Company (OMCO) test mining site in the Clarion-Clipperton Zone of the Central Pacific Ocean. More information, location and the cruise report are available at www.bodc.ac.uk/resources/inventories/cruise_inventory/report/18136/ Enquiries British Geological Survey 0115 936 3143 0115 936 3276 Environmental Science Centre, Nicker Hill, Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk distributor Enquiries British Geological Survey 0115 936 3143 0115 936 3276 Environmental Science Centre, Nicker Hill, Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk originator Enquiries British Geological Survey United Kingdom not available distributor Enquiries British Geological Survey not available originator Enquiries British Geological Survey United Kingdom not available pointOfContact notApplicable https://resources.bgs.ac.uk/images/geonetworkThumbs/58ea67fb-00f4-c6e8-e063-3050940a8f51.png Geology GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Simulation Biogeochemistry Physical properties Marine mining BGS Thesaurus of Geosciences 2022 revision Citable Data NGDC Deposited Data dataCentre 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 2028-05-30 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. Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" vector English geoscientificInformation British Geological Survey Gazetteer: Gazetteer of sea areas 2010 revision PACIFIC OCEAN [id=2002258] -126.1400 -116.3200 13.4400 13.5900 2021-06-01 2026-05-30 Microsoft Excel Spreadsheet (.xlsx) Comma-Separated Values (CSV) file (.csv) Microsoft Word document (.docx) Enquiries British Geological Survey 0115 936 3143 0115 936 3276 Environmental Science Centre, Nicker Hill, Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk distributor Enquiries British Geological Survey United Kingdom not available distributor https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item193122 WWW:DOWNLOAD-1.0-http--download Data download https://doi.org/10.5285/977703b0-bd4d-4303-ab1e-950107107dd2 WWW:LINK-1.0-http--related Citation Information - Digital Object Identifier (DOI) Valdez II, R., Bruce, E., Grant, H., Josso, P. (2026). Physical property model data for the response of deep-sea sediment to the 1979 test mining disturbance at the Ocean Minerals Company (OMCO) mining site in the Clarion-Clipperton Zone of the Central Pacific Ocean (Expedition JC241 in 2023). NERC EDS National Geoscience Data Centre. (Dataset). https://doi.org/10.5285/977703b0-bd4d-4303-ab1e-950107107dd2 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 Deep-sea sediment samples were collected from megacores (max 60 cm). The megacores were wireline deployed over the side of the vessel. Extruded slices of megacore and one entire megacore was collected for physical properties analysis to model the physical and temporal response of deep-sea sediment to the compression caused by a deep-sea mining vessel by incremental axial loading and unloading under one-dimensional drainage conditions. For each loading stage prior to unloading, time-deformation data were analysed using the time-deformation curve from log of time method to determine the coefficient of consolidation. In addition, the void ratio and coefficient of volume compressibility were determined for each loading increment.