1,721,050 research outputs found
IONIAN TETHYS LITHOSPHERE ROLL-BACK SINKING AND BACK-ARC TYRRHENIAN OPENING FROM NEW CROP SEISMIC DATA
No full textCROP seismic data acquisition, processing and interpretative reprocessing
No full textThe CROP dataset encompasses nearly 10,000 km of seismic sections. The marine part (8687.15 km) was performed from 1988 to 1995 by the RV OGS-Explora with an 80.4 liter airgun array and a 4500 m long, 180-channel streamer. The basic processing sequence focused on amplitude correction, multiple removal, deconvolution, velocity analysis, stacking, post-stack migration and time-variant filtering. Part of the marine dataset was re-processed to improve multiple attenuation, deep signal-to-noise ratio and imaging of structurally complex sectors. A proprietary Hough-transform-based algorithm was exploited to attenuate multiple events. Computation of instantaneous attributes by means of wavelet transform improved identification of weak signals in noisy background from deep crustal reflectors. Pre-stack imaging exploited the feedback from the interpretation phase to iteratively refine velocity–depth models and obtain optimum focusing of primary events. The latter interaction between processing and interpretation was the basis for the successful implementation and application of an interpretative strategy for deep crustal seismic data reprocessing
CRUSTAL TECTONO-STRATIGRAPHIC SETTING OF THE PELAGIAN FORELAND FROM NEW CROP SEISMIC DATA
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Multi-fold GPR techniques with applications to High-Resolution studies: two case histories
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Pre-stack processing of multi-fold GPR data to study the stratigraphy of shallow unconsolidated sediments
No full textLithospheric Tectono-Dynamics of the Balearic Basin opening from CROP-ECORS seismic data
No full textWe reconstruct the structure and geodynamics of the Balearic basin based on deep seismic reflection data from the CROP and CROP-ECORS projects. An interpretative processing (IP) sequence and innovative velocity filtering techniques were exploited to reprocess most of the CROP seismic lines from the area, and to enhance deeper crustal events. The resulting good quality data now image the slab of the Alpine-Tethys oceanic crust, subducted in the Balearic stage (Oligocene–Lower Miocene). Such an interpretation supports the idea that rotation of the Corso-Sardinia block in the Balearic geodynamic stage was driven by W-dipping subduction of the Alpine-Tethys lithosphere. In all the seismic sections examined in this work, the rift tectonics of both the margins of the Balearic Basin and the ocean–continent boundary are well evident
Velocity and complex trace analysis of multi-fold GPR data with application to archaeology and environment
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