1f2e4774-43a7-2811-e063-0937940ad6c4 English nonGeographicDataset non geographic dataset British Geological Survey +44 115 936 3100 Environmental Science Centre,Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk pointOfContact 2026-05-01 UK GEMINI 2.3 http://data.bgs.ac.uk/id/dataHolding/13608263 P-wave velocity and attenuation (1/Q) data of water-saturated sand pack (from dry to full saturation) at 10 kilohertz frequency measured using an acoustic pulse tube under 10 MPa effective pressure 2024-08-02 creation http://data.bgs.ac.uk/id/dataHolding/13608263 The data comprise P-wave velocity and attenuation (1/Q) measurements of water-saturated sand packs (four samples) across saturation levels, from dry to fully saturated. Using an acoustic pulse tube, measurements were recorded in the sonic frequency range (1-20 kHz, centred at 10 kHz) under 10 MPa effective pressure with atmospheric pore pressure. Data were collected in the Pulse Tube Laboratories at the National Oceanography Centre (NOC), Southampton, between March 2022 and January 2023, funded by the Natural Environment Research Council (NERC Grant NE/J020753/1), and primarily collected and analysed by Hanif Sutiyoso (University of Southampton). The experiment aimed to fill gaps in sonic frequency measurements of sediments across saturation states, providing a spectrum of water/gas saturation rather than a single value. This dataset is valuable for researchers analysing saturated sediments and is directly comparable to sonic well-logging field data due to its frequency range. The full dataset has been published at https://doi.org/10.1111/1365-2478.13607. The method involved measuring time series of signal amplitude from four samples (A to D) inside a 4.5 m water-filled acoustic pulse tube, which allows plane wave propagation in the sediment-jacketed samples. Time-domain data were transformed into the frequency domain using Fast Fourier Transform (FFT) and deconvolved with the chirp source signal to obtain the impulse response. Nonlinear inversion was used to minimize an objective function derived from initial time-domain estimates, determining the sample's complex velocity and attenuation (1/Q). Mr Sourav Kumar Sahoo National Oceanography Centre Waterfront Campus, National Oceanography Centre, European Way Southampton SO14 3ZH not available originator Hanif Santyabudhi Sutiyoso University of Southampton not available originator Laurence North National Oceanography Centre not available originator Enquiries British Geological Survey United Kingdom not available distributor Enquiries British Geological Survey United Kingdom not available pointOfContact notApplicable https://resources.bgs.ac.uk/images/geonetworkThumbs/1f2e4774-43a7-2811-e063-0937940ad6c4.png Geology GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Attenuation Acoustics BGS Thesaurus of Geosciences 2022 revision NGDC Deposited Data Citable Data dataCentre NERC_DDC otherRestrictions licenceOGL Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" 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]" English geoscientificInformation 2022-01-03 2023-06-02 Microsoft Excel (CSV) witheld Enquiries British Geological Survey United Kingdom not available distributor https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item185879 WWW:DOWNLOAD-1.0-http--download Data download https://doi.org/10.5285/c4ec6d24-51a8-4dc4-92de-b7c48dbb3516 WWW:LINK-1.0-http--related Citation Information - Digital Object Identifier (DOI) Sutiyoso, H.S., Sahoo, S., North, L. (2024). P-wave velocity and attenuation (1/Q) data of water-saturated sand pack (from dry to full saturation) at 10 kilohertz frequency measured using an acoustic pulse tube under 10 MPa effective pressure. NERC EDS National Geoscience Data Centre. (Dataset). https://doi.org/10.5285/c4ec6d24-51a8-4dc4-92de-b7c48dbb3516 information nonGeographicDataset non geographic 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 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.