Physical Properties of Oceanic lower crustal and upper mantle rocks from Atlantis Massif (NERC grant NE/N012402/1)
Physical properties of four serpentinite and four gabbro samples acquired respectively at the Southern Wall (IODP leg 357) and at the Central Dome (IODP leg 304-305) of the Atlantis Massif have been measured and analysed in the frame of a NERC UK-IODP moratorium research. The physical property measurements included simultaneous ultra-sonic wave velocities (compressional and shear wave velocities), attenuation, electrical resistivity and permeability under increasing and decreasing effective pressure ranging between 5 and 45 Mpa. Measurements were carried out using the experimental physical property measurement rig of the rock Physics laboratory of the National Oceanography Centre, Southampton, UK. The porosity and the density of the samples were estimated using their wet dry weight difference and the volume of the samples, under atmospheric pressure and room temperature. The aim of this research project was to learn about the physical properties of oceanic lower crustal and upper-mantle rocks and to find a geophysical method that would allow to distinguish between these rocks, remotely. The dataset has been acquired and interpreted by a science party including researchers from the University of Southampton and the National Oceanography Centre. The ultrasonic wave velocities, attenuation and the electrical resistivity for each sample and for each effective pressure (increasing from 5 to 45 with an interval of 10 MPa and decreasing from 45 to 5 with an interval of 20 MPa) are reported in this dataset. Permeability measurements could have been carried out only on 6 samples for which the permeability was high enough to be measured with the experimental rig.
Default
Identification info
- Metadata Language
- English (en)
- Dataset Reference Date ()
- 2015-10-24
University of Southampton, National Oceanography Centre Southampton
-
Dr Gaye Bayrakci
(
Ocean and Earth Science
)
National Oceanography Centre, Waterfront Campus, European Way
,
Southampton
,
SO14 3ZH
,
- Maintenance and update frequency
- notApplicable
- GEMET - INSPIRE themes, version 1.0
- BGS Thesaurus of Geosciences
-
- Geophysics
- Attenuation
- Gabbro
- Serpentinite
- Permeability
- Resistivity
- NGDC Deposited Data
- Oceanic crust
- Keywords ()
- Keywords
-
- NERC_DDC
- Limitations on Public Access
- otherRestrictions
- Other constraints
- Data and terms of access and use available at https://doi.pangaea.de/10.1594/PANGAEA.873535
- Use constraints
- otherRestrictions
- Other constraints
- 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.
- Other constraints
- 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.
- Spatial representation type
- textTable
- Topic category
-
- Geoscientific information
N
S
E
W
- Begin date
- 2015-10-24
- End date
- 2016-08-23
- Additional information
- NERC grant NE/N012402/1
- Code
- WGS 84 (EPSG::4326)
Distribution Information
- Data format
-
-
TAB
()
-
TAB
()
- Resource Locator
- https://doi.pangaea.de/10.1594/PANGAEA.873535
- Resource Locator
- https://doi.pangaea.de/10.1594/PANGAEA.873535
- Quality Scope
- dataset
- Other
- dataset
Report
- Dataset Reference Date ()
- 2011
- Explanation
- See the referenced specification
- Degree
Report
- Dataset Reference Date ()
- 2010-12-08
- Explanation
- See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
- Degree
- Statement
- After the IODP leg 357 (March 2016 ), four serpentinite samples from this survey, and four gabbro samples from the previous IODP leg 304- 305 that studied the same region, were sent from Marum IODP core repository to the University of Southampton. The rock samples were 6 cm height working halves of cores with a diameter of 6 cm. They have been resampled as cylindrical mini-cores of diameter of 5 cm and a height of about 1.6 cm. The samples were first oven dried at 40°C for two days, then saturated with 35 g L-1 NaCl brine. Saturated and dry weights and the diameters and heights of the samples were measured tree times in order to estimate the porosity and the density of the samples. The samples have been then kept under vacuum in a pressure vessel of two days and the pore pressure were increased to 5 MPa. Pore pressure was kept constant for the measurements under increasing and decreasing effective pressures. The ultrasonic wave velocities and attenuations were measured using pulse-echo technique. The electrical resistivity is measured with an array of 16 electrodes. For permeability determination, for the most permeable samples we used the Steady State flow technique based on Darcy's law. For the less permeable samples the pressure transmission method has been used. For calibration purposes, both methods were used on one sample.
Metadata
- File identifier
- 50594d6a-1a45-404b-e054-002128a47908 XML
- Metadata Language
- English (en)
- Resource type
- dataset
- Metadata Date
- 2024-09-16
- Metadata standard name
- UK GEMINI
- Metadata standard version
- 2.3
British Geological Survey
Environmental Science Centre,Keyworth
,
NOTTINGHAM
,
NOTTINGHAMSHIRE
,
NG12 5GG
,
United Kingdom
+44 115 936 3100