Influence of crack distribution of rocks on P-wave velocity anisotropy - a laboratory and field scale study
ABSTRACT The purpose of this paper is the comparison of P‐wave velocity and velocity anisotropy, measured at different scales under laboratory and field conditions. A shallow seismic refraction survey with shot/receiver spacing of up to 10 m was carried out on a flat outcrop of lhertzolite in the so...
Gespeichert in:
Veröffentlicht in: | Geophysical Prospecting 2010-11, Vol.58 (6), p.1099-1110 |
---|---|
Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
container_end_page | 1110 |
---|---|
container_issue | 6 |
container_start_page | 1099 |
container_title | Geophysical Prospecting |
container_volume | 58 |
creator | Vilhelm, Jan Rudajev, Vladimír Živor, Roman Lokajíček, Tomáš Pros, Zdeněk |
description | ABSTRACT
The purpose of this paper is the comparison of P‐wave velocity and velocity anisotropy, measured at different scales under laboratory and field conditions. A shallow seismic refraction survey with shot/receiver spacing of up to 10 m was carried out on a flat outcrop of lhertzolite in the southern part of the Balmuccia massif. Oriented rock samples were also obtained from the locality. The particular advantage of the laboratory method used is the possibility of measuring velocity in any direction under controlled conditions. Laboratory tests were made on spherical peridotite samples, 50 mm in diameter, by ultrasonic velocity measurements in 132 directions (meridian and parallel networks) under confining stress ranging from atmospheric to 400 MPa. The mean P‐wave velocity of the field and laboratory data differed by between 20–30%. In addition, P‐wave velocity anisotropy of 25% was detected in the field data. Whereas the anisotropy in the laboratory samples in the same orientation as the field surveys was less than 2%. This observed scaling factor is related to the different sampling sizes and the difference in frequencies of applied elastic waves. With an ultrasonic wavelength of 10 mm, laboratory samples represent a continuum. The field velocities and velocity anisotropy reflect the presence of cracks, which the laboratory rock samples do not contain. Three sub‐vertical fracture sets with differing strikes were observed in the field outcrop. Estimates of fracture stiffness from the velocity anisotropy data are consistent with other published values. These results highlight the difficulty of using laboratory velocity estimates to interpret field data. |
doi_str_mv | 10.1111/j.1365-2478.2010.00875.x |
format | Article |
fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_831149077</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>831149077</sourcerecordid><originalsourceid>FETCH-LOGICAL-a4355-95c29e88317b4e1de9eef9424c90b7e88a5ebf2c6a914a43055a800868754d6d3</originalsourceid><addsrcrecordid>eNqNUctu2zAQJIoWiJv2H3gpepJDiqQeQC-FkTgBAjdoUjQ3YkWtANqM6JJSYv19qDjwubxwsTszyxkSQjlb8nQutksuCpXlsqyWOUtdxqpSLQ8fyOI0-EgWjPEiq1iuzsjnGLeMCaaUXJDdTd-5EXuD1HfUBDA72to4BNuMg_X93A3e7CJN9V32As9In9F5Y4eJQm-jH4LfTzSjQB00PsDgwzxpaWfRtTQacEjjMLbTF_KpAxfx6_t9Tv5cXT6srrPbX-ub1c_bDKRQKquVyWusKsHLRiJvsUbsaplLU7OmTANQ2HS5KaDmMlGSEaiS6yL5lm3RinPy_ai7D_7fiHHQTzYadA569GPUSZnLmpVlQlZHpAk-xoCd3gf7BGHSnOk5Xr3Vc4p6TlHP8eq3ePUhUb-9L4HZYhegNzae-LkQeZXel3A_jrgX63D6b329vvudikTPjvT0J3g40SHsdFGKhPy7WevN_f1KrjYP-lG8AsfInUY</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>831149077</pqid></control><display><type>article</type><title>Influence of crack distribution of rocks on P-wave velocity anisotropy - a laboratory and field scale study</title><source>Wiley-Blackwell Journals</source><creator>Vilhelm, Jan ; Rudajev, Vladimír ; Živor, Roman ; Lokajíček, Tomáš ; Pros, Zdeněk</creator><creatorcontrib>Vilhelm, Jan ; Rudajev, Vladimír ; Živor, Roman ; Lokajíček, Tomáš ; Pros, Zdeněk</creatorcontrib><description>ABSTRACT
The purpose of this paper is the comparison of P‐wave velocity and velocity anisotropy, measured at different scales under laboratory and field conditions. A shallow seismic refraction survey with shot/receiver spacing of up to 10 m was carried out on a flat outcrop of lhertzolite in the southern part of the Balmuccia massif. Oriented rock samples were also obtained from the locality. The particular advantage of the laboratory method used is the possibility of measuring velocity in any direction under controlled conditions. Laboratory tests were made on spherical peridotite samples, 50 mm in diameter, by ultrasonic velocity measurements in 132 directions (meridian and parallel networks) under confining stress ranging from atmospheric to 400 MPa. The mean P‐wave velocity of the field and laboratory data differed by between 20–30%. In addition, P‐wave velocity anisotropy of 25% was detected in the field data. Whereas the anisotropy in the laboratory samples in the same orientation as the field surveys was less than 2%. This observed scaling factor is related to the different sampling sizes and the difference in frequencies of applied elastic waves. With an ultrasonic wavelength of 10 mm, laboratory samples represent a continuum. The field velocities and velocity anisotropy reflect the presence of cracks, which the laboratory rock samples do not contain. Three sub‐vertical fracture sets with differing strikes were observed in the field outcrop. Estimates of fracture stiffness from the velocity anisotropy data are consistent with other published values. These results highlight the difficulty of using laboratory velocity estimates to interpret field data.</description><identifier>ISSN: 0016-8025</identifier><identifier>EISSN: 1365-2478</identifier><identifier>DOI: 10.1111/j.1365-2478.2010.00875.x</identifier><identifier>CODEN: GPPRAR</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Publishing Ltd</publisher><subject>Anisotropy ; Applied geophysics ; Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; Fracture stiffness ; Internal geophysics ; Seismic velocity ; Shallow seismic refraction method ; Ultrasound radiation</subject><ispartof>Geophysical Prospecting, 2010-11, Vol.58 (6), p.1099-1110</ispartof><rights>2010 European Association of Geoscientists & Engineers</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a4355-95c29e88317b4e1de9eef9424c90b7e88a5ebf2c6a914a43055a800868754d6d3</citedby><cites>FETCH-LOGICAL-a4355-95c29e88317b4e1de9eef9424c90b7e88a5ebf2c6a914a43055a800868754d6d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Fj.1365-2478.2010.00875.x$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Fj.1365-2478.2010.00875.x$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,27924,27925,45574,45575</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=23328914$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Vilhelm, Jan</creatorcontrib><creatorcontrib>Rudajev, Vladimír</creatorcontrib><creatorcontrib>Živor, Roman</creatorcontrib><creatorcontrib>Lokajíček, Tomáš</creatorcontrib><creatorcontrib>Pros, Zdeněk</creatorcontrib><title>Influence of crack distribution of rocks on P-wave velocity anisotropy - a laboratory and field scale study</title><title>Geophysical Prospecting</title><description>ABSTRACT
The purpose of this paper is the comparison of P‐wave velocity and velocity anisotropy, measured at different scales under laboratory and field conditions. A shallow seismic refraction survey with shot/receiver spacing of up to 10 m was carried out on a flat outcrop of lhertzolite in the southern part of the Balmuccia massif. Oriented rock samples were also obtained from the locality. The particular advantage of the laboratory method used is the possibility of measuring velocity in any direction under controlled conditions. Laboratory tests were made on spherical peridotite samples, 50 mm in diameter, by ultrasonic velocity measurements in 132 directions (meridian and parallel networks) under confining stress ranging from atmospheric to 400 MPa. The mean P‐wave velocity of the field and laboratory data differed by between 20–30%. In addition, P‐wave velocity anisotropy of 25% was detected in the field data. Whereas the anisotropy in the laboratory samples in the same orientation as the field surveys was less than 2%. This observed scaling factor is related to the different sampling sizes and the difference in frequencies of applied elastic waves. With an ultrasonic wavelength of 10 mm, laboratory samples represent a continuum. The field velocities and velocity anisotropy reflect the presence of cracks, which the laboratory rock samples do not contain. Three sub‐vertical fracture sets with differing strikes were observed in the field outcrop. Estimates of fracture stiffness from the velocity anisotropy data are consistent with other published values. These results highlight the difficulty of using laboratory velocity estimates to interpret field data.</description><subject>Anisotropy</subject><subject>Applied geophysics</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Fracture stiffness</subject><subject>Internal geophysics</subject><subject>Seismic velocity</subject><subject>Shallow seismic refraction method</subject><subject>Ultrasound radiation</subject><issn>0016-8025</issn><issn>1365-2478</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNqNUctu2zAQJIoWiJv2H3gpepJDiqQeQC-FkTgBAjdoUjQ3YkWtANqM6JJSYv19qDjwubxwsTszyxkSQjlb8nQutksuCpXlsqyWOUtdxqpSLQ8fyOI0-EgWjPEiq1iuzsjnGLeMCaaUXJDdTd-5EXuD1HfUBDA72to4BNuMg_X93A3e7CJN9V32As9In9F5Y4eJQm-jH4LfTzSjQB00PsDgwzxpaWfRtTQacEjjMLbTF_KpAxfx6_t9Tv5cXT6srrPbX-ub1c_bDKRQKquVyWusKsHLRiJvsUbsaplLU7OmTANQ2HS5KaDmMlGSEaiS6yL5lm3RinPy_ai7D_7fiHHQTzYadA569GPUSZnLmpVlQlZHpAk-xoCd3gf7BGHSnOk5Xr3Vc4p6TlHP8eq3ePUhUb-9L4HZYhegNzae-LkQeZXel3A_jrgX63D6b329vvudikTPjvT0J3g40SHsdFGKhPy7WevN_f1KrjYP-lG8AsfInUY</recordid><startdate>201011</startdate><enddate>201011</enddate><creator>Vilhelm, Jan</creator><creator>Rudajev, Vladimír</creator><creator>Živor, Roman</creator><creator>Lokajíček, Tomáš</creator><creator>Pros, Zdeněk</creator><general>Blackwell Publishing Ltd</general><general>Blackwell</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TN</scope><scope>7U7</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope></search><sort><creationdate>201011</creationdate><title>Influence of crack distribution of rocks on P-wave velocity anisotropy - a laboratory and field scale study</title><author>Vilhelm, Jan ; Rudajev, Vladimír ; Živor, Roman ; Lokajíček, Tomáš ; Pros, Zdeněk</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a4355-95c29e88317b4e1de9eef9424c90b7e88a5ebf2c6a914a43055a800868754d6d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Anisotropy</topic><topic>Applied geophysics</topic><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>Fracture stiffness</topic><topic>Internal geophysics</topic><topic>Seismic velocity</topic><topic>Shallow seismic refraction method</topic><topic>Ultrasound radiation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Vilhelm, Jan</creatorcontrib><creatorcontrib>Rudajev, Vladimír</creatorcontrib><creatorcontrib>Živor, Roman</creatorcontrib><creatorcontrib>Lokajíček, Tomáš</creatorcontrib><creatorcontrib>Pros, Zdeněk</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Oceanic Abstracts</collection><collection>Toxicology Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Geophysical Prospecting</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Vilhelm, Jan</au><au>Rudajev, Vladimír</au><au>Živor, Roman</au><au>Lokajíček, Tomáš</au><au>Pros, Zdeněk</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Influence of crack distribution of rocks on P-wave velocity anisotropy - a laboratory and field scale study</atitle><jtitle>Geophysical Prospecting</jtitle><date>2010-11</date><risdate>2010</risdate><volume>58</volume><issue>6</issue><spage>1099</spage><epage>1110</epage><pages>1099-1110</pages><issn>0016-8025</issn><eissn>1365-2478</eissn><coden>GPPRAR</coden><abstract>ABSTRACT
The purpose of this paper is the comparison of P‐wave velocity and velocity anisotropy, measured at different scales under laboratory and field conditions. A shallow seismic refraction survey with shot/receiver spacing of up to 10 m was carried out on a flat outcrop of lhertzolite in the southern part of the Balmuccia massif. Oriented rock samples were also obtained from the locality. The particular advantage of the laboratory method used is the possibility of measuring velocity in any direction under controlled conditions. Laboratory tests were made on spherical peridotite samples, 50 mm in diameter, by ultrasonic velocity measurements in 132 directions (meridian and parallel networks) under confining stress ranging from atmospheric to 400 MPa. The mean P‐wave velocity of the field and laboratory data differed by between 20–30%. In addition, P‐wave velocity anisotropy of 25% was detected in the field data. Whereas the anisotropy in the laboratory samples in the same orientation as the field surveys was less than 2%. This observed scaling factor is related to the different sampling sizes and the difference in frequencies of applied elastic waves. With an ultrasonic wavelength of 10 mm, laboratory samples represent a continuum. The field velocities and velocity anisotropy reflect the presence of cracks, which the laboratory rock samples do not contain. Three sub‐vertical fracture sets with differing strikes were observed in the field outcrop. Estimates of fracture stiffness from the velocity anisotropy data are consistent with other published values. These results highlight the difficulty of using laboratory velocity estimates to interpret field data.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1111/j.1365-2478.2010.00875.x</doi><tpages>12</tpages></addata></record> |
fulltext | fulltext |
identifier | ISSN: 0016-8025 |
ispartof | Geophysical Prospecting, 2010-11, Vol.58 (6), p.1099-1110 |
issn | 0016-8025 1365-2478 |
language | eng |
recordid | cdi_proquest_miscellaneous_831149077 |
source | Wiley-Blackwell Journals |
subjects | Anisotropy Applied geophysics Earth sciences Earth, ocean, space Exact sciences and technology Fracture stiffness Internal geophysics Seismic velocity Shallow seismic refraction method Ultrasound radiation |
title | Influence of crack distribution of rocks on P-wave velocity anisotropy - a laboratory and field scale study |
url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-25T08%3A41%3A37IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Influence%20of%20crack%20distribution%20of%20rocks%20on%20P-wave%20velocity%20anisotropy%20-%20a%20laboratory%20and%20field%20scale%20study&rft.jtitle=Geophysical%20Prospecting&rft.au=Vilhelm,%20Jan&rft.date=2010-11&rft.volume=58&rft.issue=6&rft.spage=1099&rft.epage=1110&rft.pages=1099-1110&rft.issn=0016-8025&rft.eissn=1365-2478&rft.coden=GPPRAR&rft_id=info:doi/10.1111/j.1365-2478.2010.00875.x&rft_dat=%3Cproquest_cross%3E831149077%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=831149077&rft_id=info:pmid/&rfr_iscdi=true |