H2020Индивидуална стипендия2019–2022

STRATASCAPE · Modelling and inverting the deep marine sedimentary record to constrain Atlantic Passive Margin landscape evolution

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

Период: 2019-09-12 → 2022-01-23
Финансиране от ЕС: 162 806 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Разпределението на седиментите от континентите към океанското дъно се анализира чрез нов компютърен модел за историята на атлантическия бряг на САЩ. Това помага за по-доброто разбиране на промените по крайбрежията, което е важно за енергетиката и устойчивостта на местните общности.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

Modelling and inverting the deep marine sedimentary record to constrain Atlantic Passive Margin landscape evolution

Coastlines host large human populations, many key natural resources, and important biodiversity hotspots. Given that coastlines are at risk of catastrophic change due to subsidence, sea level rise, increased storm intensity, and other threats, we need to understand how coastlines change through time. An integrated understanding of how Earth’s surface has changed in the geologic past, and how it will change in the future, requires that we understand how sediment is distributed from its sources on continents to the ocean floor. The Atlantic coast of North America is one coastline with a history that is strongly debated, yet there has not been an attempt to use model simulations of Earth surface change to reconstruct the geologic history of this region. One reason for this knowledge gap is the lack of computer models that are able to simulate the deposition of sediment in deep-ocean environments. We will construct a new computer model of surface change at coastlines that includes deep-ocean sediment processes, and use it to better understand the geologic history of the U.S. Atlantic coast. By addressing this knowledge gap, we will improve our ability to understand change at all of Earth’s coastlines, which has important implications for energy research, carbon capture and storage endeavors, and the long-term sustainability of coastal communities. The objectives of this study are to 1) develop a new computer model for deep-ocean sediment processes, 2) test that model by comparing it against observations, and 3) use the new model to extract the geologic history of the U.S. Atlantic coast.

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

Цел на проекта

Passive continental margins make up many of the world’s densely populated coasts, hold 35% of the world’s largest oil reservoirs, sequester carbon, and are critical biodiversity hotspots. Human populations and infrastructure on passive margins are at risk from sea level rise, increased storm intensity, and sediment starvation. The geologic evolution of passive margins around the world is poorly understood due to a lack of models that couple terrestrial erosion with sediment deposition in the deep marine environment. The Atlantic Passive Margin (APM) of the eastern United States is exceptionally enigmatic; debate centers on how many (if any) pulses of exhumation occurred on the APM since the opening of the Atlantic Ocean 200 million years ago. Yet there has been no attempt to use mechanistic surface process models to extract APM exhumation history. I propose to build a new, coupled model of terrestrial and marine sediment transport and use it to invert the rich deep marine sedimentary record for APM exhumation history. I will develop a new model for continent-scale deep marine seascape and stratigraphy evolution over geologic time, which I will couple with existing models for terrestrial and shallow marine environments. I will validate the new model against an existing small-scale stratigraphy model as well as stratigraphy from the Bay of Biscay and the Ogooué Delta, Gabon. I will use the coupled model to invert the deep marine sedimentary record and resolve APM exhumation history over the past 200 Ma. Inversion results will provide novel constraints on the number, timing, and cause of exhumation pulses, and will be compared against thermochronologic data and geodynamic models. This approach is the first to quantitatively link the development of marine stratigraphy to APM landscape change. The proposed study will unlock the potential of deep marine deposits, the most complete sedimentary archives on Earth, to yield time-resolved records of changes to Earth’s surface.

Оригинален текст от CORDIS (на английски).

Участници

GFZ HELMHOLTZ-ZENTRUM FUR GEOFORSCHUNG · POTSDAMКоординаторГермания