Time-Migrated Multichannel Seismic Profiles of the Gulf of Cagliari (CG Dataset) for Plio-Quaternary Neotectonic Analysis in Southern Sardinia (Italy)

This dataset is the result of a scientific collaboration between Istituto Nazionale di Oceanografia e di Geofisica Sperimentale - OGS and the Universities of Trieste and Cagliari in the framework of the WS10 project, funded by OGS (Grant OGS-CdA, no. 4.2.5.2010), with the support of the then Ministry of Education, Universities, and Research (MIUR) in 2010. The CG seismic dataset described here supports the analyses presented in: Del Ben A., Fais S., Geletti R., Caradonna M.C., Frisicchio V., Brancatelli G., 2026. "Tectonic Interplay in the Gulf of Cagliari (Italy): Extension, Compression and Strike-Slip Movements". Basin Research, 38, no. 3, May–June 2026: e70115. https://doi.org/10.1111/bre.70115 The CG profiles comprise five multi-channel seismic reflection lines acquired by the research vessel N/R OGS Explora in September 2010 (Zgur F., Geletti R., et al., 2011: https://hdl.handle.net/20.500.14083/6738). The resolution and penetration depth of these lines depend primarily on the characteristics of the source. The acquisition settings, including source and streamer depths, resulted in a notch frequency of 150 Hz. Assuming an average seismic velocity of 2000 m/s, the theoretical vertical resolution within the PQ sequence cannot be finer than 3–4 metres. The resolution remains high throughout the PQ sequence, while the seismic signal within the Oligo-Miocene sequence progressively attenuates. The seismic data are provided in SEG-Y format, with coordinates projected in UTM Zone 32 stored in header fields 73 and 77.本数据集为意大利国家海洋实验与地球物理研究所（Istituto Nazionale di Oceanografia e di Geofisica Sperimentale - OGS）与的里雅斯特大学、卡利亚里大学在WS10项目框架下开展科学合作的成果，该项目由OGS资助（资助编号：OGS-CdA，No.4.2.5.2010），并于2010年获得当时的教育、大学与研究部（MIUR）支持。 本文所述的CG地震数据集支撑了下述论文的分析工作：Del Ben A.、Fais S.、Geletti R.、Caradonna M.C.、Frisicchio V.、Brancatelli G.于2026年发表的《意大利卡利亚里湾的构造相互作用：伸展、挤压与走滑运动》，刊载于《盆地研究》2026年5-6月第38卷第3期，文章编号e70115，DOI：10.1111/bre.70115。 CG测线共包含5条多道地震反射剖面，由“OGS探索者号”（N/R OGS Explora）科考船于2010年9月采集完成（Zgur F.、Geletti R.等，2011：https://hdl.handle.net/20.500.14083/6738）。此类剖面的分辨率与穿透深度主要取决于震源特性。本次采集参数（含震源与拖缆深度）使得剖面的陷波频率为150Hz。假设平均地震波速为2000m/s，则PQ层序内的理论垂向分辨率约为3~4米。PQ层序全程分辨率较高，而渐新统-中新统层序内的地震信号则逐渐衰减。 本地震数据以SEG-Y格式提供，坐标采用UTM 32区投影，存储于文件头字段73与77中。