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Metadata: Natural Environment Research Council (NERC) Seabed Mining And Resilience To EXperimental impact JC241 SMARTEX: Pacific Ocean (04/Feb/2023 to 26/Mar/2023)
Abstract:
This cruise is part of the Seabed Mining And Resilience To EXperimental impact (SMARTEX) project funded by the UK Natural Environment Research Council (Grant Reference NE/T003537/1). This is the second UK cruise to the Clarion Clipperton Zone (CCZ) in the northern equatorial Pacific, an area likely to be targeted for deep-sea mining for polymetallic nodules. The first (JC120) was carried out in 2015. Scientific aims: 1. Understand the remaining impact of a realistic mining test on the benthic environment and its fauna after 44 years; 2. Assess natural temporal change in macrofaunal communities between 1989 and 2023 (at PRA site); 3. Provide the first characterisation of megafaunal species and communities present at APEI-13 (linked outreach and policy interaction aim); 4. Characterise the environment and ecology of the UK-1 area in advance of a planned nodule collector test. BGS collected deep sea sediments and nodules during JC241. Porewaters were extracted for trace metals, nutrients and alkalinity. Sediments were analysed for trace element geochemistry, loss on drying, particle size analysis and bulk and clay mineralogy by XRD. Micro XRF and SEM imaging was used to image the geochemistry of entire nodule cross sections and laser ablation ICP-MS line transects were performed across selected entire nodules for high resolution geochemical profiles. Finally, physical property analysis of sediment collected during JC241 was utilised to model the physical and temporal response of deep-sea sediment to the compression caused by a deep-sea mining vessel. More information and the cruise report are available at www.bodc.ac.uk/resources/inventories/cruise_inventory/report/18136/.
Data holder:
British Geological Survey (BGS)
| Other details | ||
| Internal code | Internally assigned metadata identifier | 35072 |
| Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | Natural Environment Research Council (NERC) Seabed Mining And Resilience To EXperimental impact JC241 SMARTEX: Pacific Ocean (04/Feb/2023 to 26/Mar/2023) |
| File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | 52a5d02f-b008-0057-e063-3050940a1a94 |
| Resource Identifier | This is the code assigned by the data owner. | BGS_CMD_REF1566 |
| Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | dataset |
| Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 2023-02-04 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2023-03-26 |
| Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | 5 |
| Spatial resolution unit | This describes the unit of spatial resolution which for distance must be metres. | urn:ogc:def:uom:EPSG::9001 |
| Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | This cruise is part of the Seabed Mining And Resilience To EXperimental impact (SMARTEX) project funded by the UK Natural Environment Research Council (Grant Reference NE/T003537/1). This is the second UK cruise to the Clarion Clipperton Zone (CCZ) in the northern equatorial Pacific, an area likely to be targeted for deep-sea mining for polymetallic nodules. The first (JC120) was carried out in 2015. Scientific aims: 1. Understand the remaining impact of a realistic mining test on the benthic environment and its fauna after 44 years; 2. Assess natural temporal change in macrofaunal communities between 1989 and 2023 (at PRA site); 3. Provide the first characterisation of megafaunal species and communities present at APEI-13 (linked outreach and policy interaction aim); 4. Characterise the environment and ecology of the UK-1 area in advance of a planned nodule collector test. BGS collected deep sea sediments and nodules during JC241. Porewaters were extracted for trace metals, nutrients and alkalinity. Sediments were analysed for trace element geochemistry, loss on drying, particle size analysis and bulk and clay mineralogy by XRD. Micro XRF and SEM imaging was used to image the geochemistry of entire nodule cross sections and laser ablation ICP-MS line transects were performed across selected entire nodules for high resolution geochemical profiles. Finally, physical property analysis of sediment collected during JC241 was utilised to model the physical and temporal response of deep-sea sediment to the compression caused by a deep-sea mining vessel. More information and the cruise report are available at www.bodc.ac.uk/resources/inventories/cruise_inventory/report/18136/. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Sample equipment types used included: Corer: Box. National Oceanography Centre was contracted to undertake the survey on behalf of Natural Environment Research Council. Sediment samples were collected from megacores (max 60 cm), ROV pushcores (max 30 cm, with one XL pushcore of 60 cm) and 5 metre gravity core. The megacores and gravity cores were wireline deployed over the side of the James Cook. Extensive ROV video footage and imaging allowed groundtruthing and precise landing location cataloguing for many megacores and gravity cores. ROV push cores were taken by ROV pilots in locations specified by scientists onboard, also allowing for precise location information. Once retrieved on deck, gravity cores were sectioned into roughly one metre sections labelled from (surface) A, B, C, D, E (base). Cylindrical sediment samples were collected using cut off syringes and porewater extracted using rhizomes (and split into aliquots for different analyses). Megacores and pushcore sediment was sampled by extrusion and slicing at set intervals. Sampling was generally 1 cm slices in the top 10 cm and 2 cm thick slices below 10 cm. Porewater was extracted at similar intervals using rhizomes and split into aliquots for different analyses. During deployment of boxcores, nodules were collected. After these nodules had been checked for fauna/biota by the biologists, they were washed to reduce salt build up, set out to dry, photographed in trays and bagged up in bulk bags by station number. They were then sealed. Nodules were also measured in three dimensions and data recorded. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | NDGO0001 |
| Keyword title | NERC OAI Harvesting | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Geology |
| Keyword title | Geology | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | soil and sediment |
| Keyword title | soil and sediment | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | crust |
| Keyword title | crust | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Lithology |
| Keyword title | Lithology | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 13.7519 |
| East | The eastern-most limit of the data resource in decimal degrees | -126.1858 |
| South | The southern-most limit of the data resource in decimal degrees | 12.9333 |
| West | The western-most limit of the data resource in decimal degrees | -128.3578 |
| Regional sea | NORTHEAST PACIFIC OCEAN (180W) | |
| Responsible organisations | ||
| Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
| Organisation name | British Geological Survey (BGS) | |
| Phone | +44 (0)131 667 1000 | |
| Fax | +44 (0)131 668 4140 | |
| Delivery point | The Lyell Centre, Research Avenue South | |
| Postal code | EH14 4AP | |
| City | Edinburgh | |
| Country | UK | |
| enquiries@bgs.ac.uk | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | British Geological Survey (BGS) | |
| Phone | +44 (0)131 667 1000 | |
| Fax | +44 (0)131 668 4140 | |
| Delivery point | The Lyell Centre, Research Avenue South | |
| Postal code | EH14 4AP | |
| City | Edinburgh | |
| Country | UK | |
| enquiries@bgs.ac.uk | ||
| Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
| Organisation name | British Geological Survey (BGS) | |
| Phone | +44 (0)131 667 1000 | |
| Fax | +44 (0)131 668 4140 | |
| Delivery point | The Lyell Centre, Research Avenue South | |
| Postal code | EH14 4AP | |
| City | Edinburgh | |
| Country | UK | |
| enquiries@bgs.ac.uk | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Natural Environment Research Council | |
| offshoredata@bgs.ac.uk | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | http://mapapps2.bgs.ac.uk/geoindex_offshore/home.html?cruise=JC241 |
| Locator name | Name of the web resource | BGS Offshore Geoindex |
| Locator function | Code that describes the function of the resource. ISO function code chosen from ISO 19115-1 Codelist | search |
| Dataset constraints | ||
| 20 Limitations on Public Access - Access constraints | otherRestrictions | |
| 21 Conditions for Access and Use - Use limitation | This states any constraints on use of the data. Multiple conditions can be recorded for different parts of the data resource. If no conditions apply, then `No condtions apply` is recorded. This uses free text. | unrestricted use, copyright acknowledgement - Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains Natural Environment Research Council materials ©NERC [year]" |
| Version info | ||
| Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2023-03-26 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-10-02 |
| Metadata date | The date when the content of this metadata record was last updated. | 2026-10-01 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN Discovery Metadata Standard |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | Version 2.3.5 |