探针偏角对海底热流测量结果的影响

发布时间：2018-06-20 09:03

本文选题：海底热流 + 地温梯度　；参考：《热带海洋学报》2016年04期

【摘要】：南海和印度洋共87个海底热流测量站位的探针偏角分布表明:海底热流测量过程中,探针插入海底沉积物后通常都存在偏角,其偏角在0°~10°的占48.3%,10°~20°的占20.7%,20°~30°的占2.3%,30°~40°的占2.3%,超过40°的占26.3%。当用探针偏角较大时,必然会给地热参数计算带来不容忽视的相对误差。因此,文章建立探针偏角与地温梯度和热流相对误差之间的定量关系式,并据此计算得知:探针偏角10°时,对地热参数测量影响不大,其相对误差只在2.0%以内;而当探针偏角增大到15°~20°时,地热参数相对误差则增大到5.0%左右,且随着探针偏角逐渐增大,引起的相对误差呈非线性迅速增大。因此,建议今后进行海底热流测量过程中,尽可能获取探针插入海底沉积物时的偏角,进而可对地温梯度和热流进行偏角校正,获得更为准确的地热参数。
[Abstract]:The angle distribution of the probe at 87 stations in the South China Sea and the Indian Ocean shows that in the process of submarine heat flow measurement, the probe usually has an angle after it is inserted into the sediment of the sea floor. The angle of deviation was 48.3 掳/ 10 掳and 20.7% (20 掳/ 20 掳) at 0 掳/ 10 掳and 20 掳/ 30 掳/ 20 掳/ 20 掳, respectively. The ratio of 20 掳to 30 掳/ 30 掳/ 40 掳was 2.3cm, and that of more than 40 掳was 26.3 掳/ 26.3 respectively. When the deflection angle of the probe is large, the relative error can not be ignored in the calculation of geothermal parameters. Therefore, the quantitative relationship between the probe deflection angle and the relative errors of the geothermal gradient and heat flux is established, and the results show that the relative error is only within 2.0% when the probe deviation angle is 10 掳. However, when the probe angle increases to 15 掳~ 20 掳, the relative error of geothermal parameters increases to about 5.0%, and the relative error increases rapidly with the increase of probe deflection angle. Therefore, it is suggested that in the process of submarine heat flux measurement in the future, the deflection angle of the probe inserted into the seabed sediment should be obtained as far as possible, and then the deviation angle of the geothermal gradient and heat flux can be corrected, and more accurate geothermal parameters can be obtained.
【作者单位】：国土资源部海底矿产资源重点实验室广州海洋地质调查局;中国科学院边缘海地质重点实验室南海海洋研究所;
【基金】：国家自然科学基金项目(41106086、41474065) 国土资源部海底矿产资源重点实验室开放基金项目(KLMMR-2013-A-10) 中国科学院战略性先导科技专项子课题(XDA11040303);中国科学院科研装备研制项目(YZ201136);中国科学院知识创新工程青年人才领域前沿项目(SQ201007);中国科学院边缘海地质重点实验室基金项目(MSGL09-08、MSGL12-08) 中国地质调查局项目(GZH201400202、1212010611302) 国家高技术研究发展计划(“863”计划)项目(2009AA09A201-05)~~
【分类号】：P714

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