Acoustic measurements of marine sediments with pebbles and cobbles

Holland Charles W.; Dettmer Jan; Steininger Gavin; Dosso Stan E.; Lowrie Allen

摘要

ABSTRACT > The majority of sediment acoustics research has focused to date on sediments with sand‐sized particles or smaller; measurements for sediments containing cobbles (6–26 cm) are rare. This paper presents the first measurements (to the authors’ knowledge) over a wide frequency range of compressional‐wave velocity and bulk density for a sediment with cobbles. The in situ velocity from inversion from wide‐angle reflection‐coefficient data at 0.4–2 kHz for cobbles suspended in sand is found here to be 1800 m/s with 95% credibility interval bounds of [1787–1828] m/s and for cobbles suspended in clay 1532 [1528–1536] m/s. Measured core velocities at 50 kHz and 200 kHz are lower for each sediment due to multiple scattering. The in situ bulk density for cobbles suspended in sand is 2.25 [2.21–2.28] g/cm 3 and for cobbles suspended in clay 1.83 [1.78–1.87] g/cm 3 . Though cobbles in the upper few metres of sediment may be considered unusual on the mid‐shelf at mid‐latitudes, they appear to be present over tens of square kilometres on the Malta Plateau in a several metre thick layer starting at about 1 m below seafloor. In fact, geologic process considerations suggest that cobbles may be generally more common in mid to outer shelf environments than the paucity of measurements would suggest. Increased interest in the Arctic continental shelf environment, where pebbles and cobbles are expected to be prevalent, provides an additional motivation for this work. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“Main”XML：Lang =“en”> <标题类型=“main”>抽象</ title> > 大多数沉积物声学研究都集中在沉积物中的沉积物或较小;含有鹅卵石（6-26厘米）的沉积物的测量很少见。本文介绍了第一次测量（对作者知识）在宽的压缩波速度和堆积堆积的宽频率范围内，具有鹅卵石的沉积物。这原位</ i> 从悬挂在沙子中的0.4-2 kHz的大角度反射系数数据中的速度从0.4-2 kHz悬挂在砂中的鹅卵石中，在此处发现为1800米/秒，具有95％的可信度间隔界和悬浮的鹅卵石粘土1532 [1528-1536] m / s。由于多种散射，每个沉积物的50kHz和200kHz的测量核心速度较低。这原位</ i> 悬浮在沙子中的堆积密度为2.25 [2.21-2.28] G / cm 3 </ sup> 以及粘土中的鹅卵石1.83 [1.78-1.87] g / cm 3 </ sup> 。虽然沉积物的较高米的鹅卵石可能被视为中间覆盖的中间架子，但它们似乎在马耳他高原上呈现在几米的厚度下，从海底下方开始在大约1米处开始。事实上，地质过程考虑表明，在中间到外部货架环境中，卵形可能比测量的缺乏建议。增加了北极大陆架环境的兴趣，其中鹅卵石和鹅卵石预计普遍存在，为这项工作提供了额外的动机。 </ p> </摘要> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-25702/'>《Near surface geophysics》</a> <b style="margin: 0 2px;">|</b><span>2020年第1期</span><b style="margin: 0 2px;">|</b><span>共18页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Holland Charles W.&option=202" target="_blank" rel="nofollow">Holland Charles W.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Dettmer Jan&option=202" target="_blank" rel="nofollow">Dettmer Jan;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Steininger Gavin&option=202" target="_blank" rel="nofollow">Steininger Gavin;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Dosso Stan E.&option=202" target="_blank" rel="nofollow">Dosso Stan E.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Lowrie Allen&option=202" target="_blank" rel="nofollow">Lowrie Allen;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>The Applied Research Laboratorythe Pennsylvania State UniversityState College PA USA;</p> <p>Department of GeoscienceUniversity of CalgaryCalgary Alberta Canada;</p> <p>School of Earth and Ocean SciencesUniversity of VictoriaVictoria BC Canada;</p> <p>School of Earth and Ocean SciencesUniversity of VictoriaVictoria BC Canada;</p> <p>238 F. Z. Goss Road Picayune MS USA;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/163.html" title="地球物理学">地球物理学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Inversion&option=203" rel="nofollow">Inversion;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Reflection&option=203" rel="nofollow">Reflection;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Velocity&option=203" rel="nofollow">Velocity;</a> </p> <div class="translation"> 机译：反演;反射;速度; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704023841298.html">Acoustic measurements of marine sediments with pebbles and cobbles</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Holland Charles W.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Holland Charles W.,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Dettmer Jan&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Dettmer Jan,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Steininger Gavin&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Steininger Gavin,</a> <a href="/journal-foreign-25702/" target="_blank" rel="nofollow" class="tuijian_authcolor">Near surface geophysics .</a> <span>2020</span><span>,第1期</span> </span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：鹅卵石和鹅卵石的海洋沉积物的声学测量</span> </p> </li> <li> <div> <b>2. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704019268999.html">Velocity dispersion and attenuation in granular marine sediments: Comparison of measurements with predictions using acoustic models</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Kimura M.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Kimura M. </a> <a href="/journal-foreign-31146/" target="_blank" rel="nofollow" class="tuijian_authcolor">The Journal of the Acoustical Society of America .</a> <span>2011</span><span>,第6期</span> </span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：颗粒状海洋沉积物中的速度散布和衰减：使用声学模型将测量结果与预测结果进行比较</span> </p> </li> <li> <div> <b>3. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704011833701.html">Comparison of in situ and laboratory acoustic measurements on Lough Hyne marine sediments</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Angus I. 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