H2020Индивидуална стипендия2021–2023

TANGO · A probabilistic framework for assessing polar wander – Constraining paleolongitude in deep time

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

Период: 2021-08-01 → 2023-10-17
Финансиране от ЕС: 214 159 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Древната геометрия на тектоничните плочи се анализира чрез палеомагнитни данни, за да се определи точното местоположение на континентите преди 130 милиона години. Това помага за по-точното възстановяване на картата на Земята и разбирането на нейния развитие в дълбокото минало.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

A probabilistic framework for assessing polar wander – Constraining paleolongitude in deep time

Many of the most outstanding Earth science questions require an understanding of paleogeography and its temporal evolution through the incessant motion of the tectonic plates. Plate motions of the last ~130 Ma are well-resolved from magnetic isochrons and hotspot tracks, but as those records are progressively destroyed by subduction, they cannot be used in deeper time. Before 130 Ma, plate motions can only be quantified through the study of paleomagnetism, but two key components have so far prevented us from using this tool to its full potential. First, the paleomagnetic record contains substantial noise that is not integrated into the analysis. Second, owing to the inherent axial symmetry of the Earth's magnetic field, paleolongitude cannot be constrained and remains the greatest uncertainty in pre-Cretaceous plate reconstructions. It is of the utmost importance to consider what shortcomings may be present in our present methods, and how these may be improved. This fellowship aimed to reshape the current state-of-the-art in paleomagnetic data analysis by assessing polar wander with rigorous uncertainty estimates to accurately determine paleolongitude, addressing a long-standing challenge in geophysics.

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

Цел на проекта

The quantification of past plate motions is of paramount importance to advancing our understanding of Earth’s evolution. Plate motions of the last ~130 Ma are well-resolved from magnetic isochrons and hotspot tracks, but as those records are progressively destroyed by subduction, they cannot be used in deeper time. Before 130 Ma, plate motions can only be quantified through the study of paleomagnetism, but analytical limitations have so-far prevented us from using this tool to its full potential. For example, owing to the axial symmetry of the Earth’s magnetic field, the determination of paleolongitude from paleomagnetic data –although theoretically possible– has long been considered an intractable problem. TANGO will capitalize on this untapped potential through an innovative and cross-disciplinary approach integrating modern data-science techniques into paleomagnetic research, thereby opening a new research frontier.Aiming to contribute towards the neglected issue of paleomagnetic precision, I will focus on state-of-the-art computer-intensive statistical methods to provide the conceptual basis for a much needed probabilistic framework for paleomagnetic research. These efforts will allow me to provide paleogeographic reconstructions with uncertainty estimates for the first time. With that framework, through application of unsupervised learning methods, I will also be able to tackle the outstanding problem of paleolongitude determination in deep geologic time, which remains one of the most important challenges in modern geophysics. Such novel and quantitative methods development is strongly complementary to the core research efforts at CEED (University of Oslo) to explore the missing links between plate tectonics and mantle evolution. In this pursuit, TANGO will reinforce the international and multidisciplinary dimension of my early stage career and will allow the European Union to remain at the cutting-edge of paleomagnetic and tectonic-related research.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSITETET I OSLO · OsloКоординаторНорвегия