Joint elastic-electrical properties of sediments in the Yellow Sea  

作　　者：HAN TongCheng LIU BaoHua KAN GuangMing MENG XiangMei DING ZhongJun 

机构地区：[1]The First Institute of Oceanography,State Oceanic Administration,Qingdao 266061,China [2]Key Laboratory of Marine Sedimentology and Environmental Geology,State Oceanic Administration,Qingdao 266061,China

出　　处：《Science China Earth Sciences》2012年第1期143-148,共6页中国科学（地球科学英文版）

基　　金：supported by the Oceanic Special Public Sector Research Project (Grant No. 200805008)

摘　　要：We measured in the laboratory compressional wave velocity and electrical resistivity on 434 sediment samples collected from the Yellow Sea to study the joint elastic-electrical properties of marine sediments. Porosity was found to reduce both elastic velocity and electrical resistivity of the marine sediments in a non-linear fashion; velocity showed an approximate linear increase with increasing logarithm of resistivity. Various effective medium models either implemented or developed were compared with the new dataset. The model results showed that the combined self-consistent approximation and differential effective medium model using critical porosity of 0.6 and 0.5 for velocity and resistivity respectively gave a reasonable description of the joint elastic-electrical behaviors of the marine sediments. The joint elastic-electrical properties of the marine sediments established would be used to estimate resistivity from measured velocity and vice versa, and could also be suitable for detection of gas hydrate or other suitable targets from joint seismic-resistivity surveys.We measured in the laboratory compressional wave velocity and electrical resistivity on 434 sediment samples collected from the Yellow Sea to study the joint elastic-electrical properties of marine sediments. Porosity was found to reduce both elastic velocity and electrical resistivity of the marine sediments in a non-linear fashion; velocity showed an approximate linear in- crease with increasing logarithm of resistivity. Various effective medium models either implemented or developed were com- pared with the new dataset. The model results showed that the combined self-consistent approximation and differential effec- tive medium model using critical porosity of 0.6 and 0.5 for velocity and resistivity respectively gave a reasonable description of the joint elastic-electrical behaviors of the marine sediments. The joint elastic-electrical properties of the marine sediments established would be used to estimate resistivity from measured velocity and vice versa, and could also be suitable for detec- tion of gas hydrate or other suitable targets from joint seismic-resistivity surveys.

关 键 词：joint elastic-electrical properties marine sediments Yellow Sea effective medium models 

分 类 号：P736.21[天文地球—海洋地质] TM862[天文地球—海洋科学]