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首页> 外文会议>IASME/WSEAS International Conference on Geology and Seismology >Multiparametric seafloor exploration: the Marsili Basin and Volcanic Seamount case (Tyrrhenian Sea, Italy)
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Multiparametric seafloor exploration: the Marsili Basin and Volcanic Seamount case (Tyrrhenian Sea, Italy)

机译：Multiparametric Seafloor探索：Marsili盆地和火山海山案（Tyrrhenian Sea，Italy）

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Exploration of ocean seafloor is of paramount importance for a better understanding of the geodynamic evolution of our Planet. The pilot experiment of ORION-GEOSTAR 3 EC project was the first long-term continuous geophysical and oceanographic experiment of an important seafloor area of Southern Tyrrhenian Sea, the Marsili abyssal plain. The latter hosts the Marsili Seamount which is Europe's one of the largest underwater volcano of Plio-Pleistocenic age. In spite of its dimensions, it is rather unknown about the present characteristics and activity. For this reason, we deployed a deep-sea observatory network, composed by two bottom observatories, on the seafloor at the base of the seamount at 3320 m b.s.l., in the period December 2003-May 2005. Some of the instruments on board the observatory were: broad-band seismometers, hydrophones, gravity meter, two magnetometers (scalar and vectorial), 3D single-point current meter, ADCP, CTD, automatic pH analyser and off-line water sampler for laboratory analyses. The first successful scientific objective was to obtain long-term continuous recordings under a unique time reference. The data analysis shows that they are generally of good quality and really continuous (only a few gaps). As a first step we performed a classification of seismic waveforms, a first inversion of magnetic variational data, and a first analysis of gravity meter, chemical and oceanographic data. Analysis of individual time series has shown interesting results, i.e. depth of the magnetic Moho under the Marsili, attenuation of recorded seismic body waves and clues of hydrothermal circulation. We show examples of the preliminary data analysis together with first results and comparisons among data coming from different sensors.
机译：对海洋海底的探索至关重要，以更好地了解我们的星球的地磁演变。 Orion-Geostar 3 EC项目的试验实验是Marsili Byssal Plane南部南部南部的重要海底地区的第一个长期连续地球物理和海洋学实验。后者主持了Marsili Seamount，这是欧洲最大的Plio-eyistocenic年龄的水下火山之一。尽管其尺寸，但是关于目前的特征和活动是相当难闻的。出于这个原因，我们部署了由两个底部观察者组成的深海天文台网络，在2003年12月至2005年12月的3320米BSL的Sealout的海底上，在2005年12月期间。在天文台上的一些仪器是：宽带地震仪，水机，重力计，两个磁力计（标量和矢量），3D单点电流表，ADCP，CTD，自动pH分析仪和离线水采样器进行实验室分析。第一个成功的科学目标是在一个独特的时间参考下获得长期连续记录。数据分析表明，它们通常具有良好的质量，真正连续（仅几幅间隙）。作为第一步，我们执行地震波形的分类，磁性变分数据的第一反转，以及重力计的第一次分析，化学和海洋数据。单个时间序列的分析显示了有趣的结果，即Marsili下的磁性Moho的深度，记录的地震体波和水热循环线索的衰减。我们展示了初步数据分析的示例以及来自来自不同传感器的数据之间的第一结果和比较。

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