Results 1 to 10 of about 51,259 (279)

Tunnel valleys in the southeastern North Sea: more data, more complexity [PDF]

open access: yesEiszeitalter und Gegenwart, 2022
Large Pleistocene ice sheets have produced glacial structures both at and below the surface in northern Europe. Some of the largest and most erosive structures are so-called tunnel valleys (TVs): large and deep channels (typically up to 5 km wide and up ...
A. Lohrberg   +4 more
doaj   +1 more source

Acoustic Evidence of Shallow Gas Occurrences in the Offshore Sinú Fold Belt, Colombian Caribbean Sea

open access: yesJournal of Marine Science and Engineering, 2023
High-resolution seismic analysis and bathymetry data, used in the Offshore Sinú Fold Belt (OSFB), have revealed seabed and sub-surface anomalies, which were probably caused by the presence of shallow gas within the sedimentary records.
Ana María Osorio-Granada   +9 more
doaj   +1 more source

Seismic imaging across fault systems in the Abitibi greenstone belt – an analysis of pre- and post-stack migration approaches in the Chibougamau area, Quebec, Canada [PDF]

open access: yesSolid Earth, 2021
Two high-resolution seismic reflection profiles acquired north and south of Chibougamau, located in the northeast of the Abitibi subprovince of Canada, help understand historic volcanically hosted massive sulfide (VMS) deposits and hydrothermal Cu–Au ...
S. Cheraghi   +5 more
doaj   +1 more source

Data-Driven Seismic Impedance Inversion Based on Multi-Scale Strategy

open access: yesRemote Sensing, 2022
Seismic impedance inversion is one of the most commonly used techniques for reservoir characterization. High accuracy and high resolution seismic impedance is a prerequisite for subsequent reservoir interpretation.
Guang Zhu   +3 more
doaj   +1 more source

Two enigmatic ridges in the Pantelleria Vecchia Bank (NW Sicilian Channel)

open access: yesHeliyon, 2023
The Pantelleria Vecchia Bank is a submerged calcareous-arenitic shoal in the NW sector of the Sicilian Channel. Together with other morphological heights, some of which are volcanic in origin, this shoal punctuates the shallow Adventure Plateau, which ...
Emanuele Lodolo   +3 more
doaj   +1 more source

Stylization of a Seismic Image Profile Based on a Convolutional Neural Network

open access: yesEnergies, 2022
Seismic data are widely used in oil, gas, and other kinds of mineral exploration and development. However, due to low artificial interpretation accuracy and small sample sizes, seismic data may not meet the needs of convolutional neural network training.
Huiting Hu   +4 more
doaj   +1 more source

New Seismoacoustic Data on Shallow Gas in Holocene Marine Shelf Sediments, Offshore from the Cilento Promontory (Southern Tyrrhenian Sea, Italy)

open access: yesJournal of Marine Science and Engineering, 2022
High-resolution seismoacoustic data represent a useful tool for the investigations of gas-charged sediments occurring beneath the seabed through the identification of the diagnostic intrasedimentary features associated with them.
Gemma Aiello, Mauro Caccavale
doaj   +1 more source

Identification of the late Quaternary activity of the littoral fault zone at the Northern Jiangsu province in China

open access: yesFrontiers in Earth Science, 2023
It has been accepted that a littoral fault zone (LFZ) exists at the Northern Jiangsu Province, but its geometric distribution and the late Quaternary activity are still controversial. In this study, to constrain its late Quaternary activity, we collected
Haomin Ji   +11 more
doaj   +1 more source

Downhole logging as a paeoceanographic tool on ocean drilling program leg 138: Interface between high-resolution stratigraphy and regional syntheses [PDF]

open access: yes, 1992
On Ocean Drilling Program (ODP) Leg 138, standard shipboard procedures were modified to allow for the real-time monitoring of several laboratory core-scanning systems that provide centimeter-scale measurements of saturated bulk density, magnetic ...
Bloomer, Stephen F.   +6 more
core   +6 more sources

Q-compensated reverse-time migration for natural gas hydrate using fractional viscoacoustic wave equation

open access: yesEnergy Reports, 2021
Natural gas hydrate (NGH) is a potential clean alternative energy source for fossil fuels. In seismic imaging profiles, NGH is often identified by the bottom-simulating reflection (BSR), which is characterized by strong reflection amplitude and negative ...
Yaxin Ning, Yanfei Wang
doaj   +1 more source

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