H2020Индивидуална стипендия2015–2017

3DWISE · 3D Full Waveform Inversion on seismic data at the East Pacific Rise

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2015-09-01 → 2017-08-31
Финансиране от ЕС: 173 076 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Структурата на горната океанска кора в района на Източнопацифическия хребет се анализира чрез 3D сеизмични данни. Това помага да се разбере връзката между големите магматични процеси и локалните вулканични и хидротермални явления по морското дъно.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

3D Full Waveform Inversion on seismic data at the East Pacific Rise

The mid-ocean ridge (MOR) system is the longest volcanic mountain chain that wraps around the Globe along which two plates have been separating and oceanic crust has been forming by highly active magmatic processes operating within and at the base of thus formed crust. It is believed that there is a strong link between these magmatic processes known at large spatial scales (1-100 km) and relatively localized (0.001-1 km) tectonic/volcanic/hydrothermal/biological processes, and their expression onto the seafloor. However, the characteristics of the link are largely unknown. The origin of the most of the unknowns is embedded in poorly defined properties of the upper crust (its structure, P and S wave velocities, porosity, density, etc.), where the link is hosted and its activity is taking place. To map these properties at an unprecedented resolution scale and unveil the existing link, we apply advanced three-dimensional (3D) full waveform inversion (FWI) techniques, which have been recently developed by industry, to a unique 3D seismic reflection data acquired at the East Pacific Rise (EPR). This portion of a MOR system is characterized by a prolific hydrothermal and magmatic activity and multidisciplinary time-series measurements, offering interdisciplinary approach to solve some of the fundamental problems in Earth sciences. The overall goal of the 3DWISE project is to obtain high-resolution, 3D geophysical images of the upper oceanic crust applying a recently developed FWI technique for high-resolution P- and S-wave analysis to a 3D seismic dataset that was collected along the EPR (Figure 1).

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

The mid-ocean ridge system is the longest volcanic mountain chain that wraps around the Globe along which two plates have been separating and oceanic crust has been forming by highly active magmatic processes operating within and at the base of thus formed crust. It is believed that there is a strong link between these magmatic processes known at large spatial scales (1-100 km) and relatively localized (0.001-1 km) tectonic/ volcanic/hydrothermal/biological processes, and their expression onto the seafloor. However, the characteristics of the link are largely unknown. The origin of the most of the unknowns is embedded in poorly defined properties of the upper crust (its structure, P and S wave velocities, porosity, density, anisotropy, etc.), where the link is hosted and its activity is taking place. To map these properties at an unprecedented resolution scale and unveil the existing link, we propose to apply an advanced three-dimensional (3D) full waveform inversion (FWI) technique, which has been recently developed in partnership with industry, to a unique 3D seismic reflection data acquired at the East Pacific Rise. The proposed work will not only result in detailed spatial characterization of the upper crust, but also lay foundation for the 3D FWI as a standard tool for 3D geophysical subsurface exploration of, but not limited to, global tectonics. The study area, the East Pacific Rise at 9º50’N, is a portion of the mid-ocean ridge system characterized by prolific hydrothermal activity, two documented volcanic eruptions and substantial multidisciplinary time-series measurements (unique on the Earth), offering interdisciplinary approach to solve one of the most fundamental problems in Earth sciences. These results will also enable us to tackle some of the long-standing questions on patterns of hydrothermal flow, signature of fine-scale tectono-magmatic segmentation through the upper crust and volume estimates of the erupted lava emplaced on the seafloor.

Оригинален текст от CORDIS (на английски).

Участници

INSTITUT DE PHYSIQUE DU GLOBE DE PARIS · ParisКоординаторФранция