Date (Creation)

2024-08-02

Citation identifier

http://data.bgs.ac.uk/id/dataHolding/13608263

Point of contact

Organisation name	Individual name	Electronic mail address	Role
National Oceanography Centre	Mr Sourav Kumar Sahoo	not available	Originator
University of Southampton	Hanif Santyabudhi Sutiyoso	not available	Originator
National Oceanography Centre	Laurence North	not available	Originator
British Geological Survey	Enquiries	not available	Distributor
British Geological Survey	Enquiries	not available	Point of contact

Maintenance and update frequency

notApplicable

GEMET - INSPIRE themes, version 1.0

• Geology

BGS Thesaurus of Geosciences

• Attenuation

• Acoustics

• NGDC Deposited Data

dataCentre

• NGDC Deposited Data

Keywords

• NERC_DDC

Access constraints

Other restrictions

Other constraints

licenceOGL

Other constraints

Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Use constraints

Other restrictions

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

Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Language

English

Topic category

• Geoscientific information

Begin date

2022-01-03

End date

2023-06-02

Distribution format

Name	Version
Excel Comma Separated Value (csv)

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
British Geological Survey	Enquiries	not available	Distributor

OnLine resource

Protocol	Linkage	Name
	https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item185879	Data

OnLine resource

Protocol	Linkage	Name
	https://doi.org/10.5285/c4ec6d24-51a8-4dc4-92de-b7c48dbb3516	Digital Object Identifier (DOI)

Hierarchy level

Non geographic dataset

Other

non geographic dataset

Statement

The experimental setup at the National Oceanography Centre (NOC), Southampton, employed a 4.5 m stainless steel acoustic pulse tube with an inner diameter of 0.07 m for analysing acoustic properties via plane wave propagation. Experiments were conducted at 4°C and 10 MPa effective pressure. A piezoelectric transducer generated 1-20 kHz chirp signals through the sample, positioned between two hydrophones spaced 1.2 m apart. Data were recorded with a 6-second, 20 kHz chirp using a synchronized Agilent signal generator and a LeCroy oscilloscope, with 16 stacked readings to enhance the signal-to-noise ratio. Confining and pore pressures were regulated by an ISCO EX-100D syringe pump system, systematically increased while venting to prevent air entrapment. Measurements in an empty pulse tube were taken as a calibration reference. Time-domain data were processed using Fast Fourier Transform (FFT), deconvolved to obtain impulse responses, and gated to reduce reflections. Calibration on nylon and sand packs achieved R² values of 0.95 and 0.89, respectively, with velocity and attenuation errors of ±2.4% and ±5.8%. Comparisons between water velocities in the PVC-jacketed and empty pulse tube showed a 3% reduction due to the jacket, underscoring its impact on measurements. A calibration factor of 1.03 was applied to ensure accuracy across materials.

Metadata

File identifier

1f2e4774-43a7-2811-e063-0937940ad6c4 XML

Metadata language

English

Hierarchy level

Non geographic dataset

Hierarchy level name

non geographic dataset

Date stamp

2025-01-10

Metadata standard name

UK GEMINI

Metadata standard version

2.3

Metadata author

Organisation name	Individual name	Electronic mail address	Role
British Geological Survey		enquiries@bgs.ac.uk	Point of contact

Dataset URI

http://data.bgs.ac.uk/id/dataHolding/13608263