Banca de QUALIFICAÇÃO: CARLA HEMILLAY DE OLIVEIRA SANTOS

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : CARLA HEMILLAY DE OLIVEIRA SANTOS
DATE: 14/01/2021
TIME: 08:30
LOCAL: Videoconferencia - https://cutt.ly/6fcqwHK
TITLE:

ANALOG MODELING OF EMPLACEMENT THE SALT STRUCTURES IN
EXTENSIONAL TECTONIC ENVIRONMENT

KEY WORDS:

Physical Modeling; Salt Tectonics; Extensional Salt-Tectonic Systems.

PAGES: 54
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUMMARY:

The understanding and the evolution of salt tectonics are remarkably valuable for hydrocarbon exploration, fertilizers, and the storage of CO 2 in salt caves. For these reasons, the investigation of individual salt structures in many salt basins worldwide has evolved over the years, with the identification of a wide variety of new salt structures, related to different events and its causes. This work describes processes such as the nucleation and evolution of individual salt structures and their relationship with the overburden in different extensional and gravity-driven deformation boundary conditions. Experiments were carried out using sand and silicone putty to represent sediments and salt, respectively; models showed that both the flow and the thickness of the silicone layer impact the location and geometry of the structural framework of models. In experimental models with a thick silicone layer, symmetrical diapirs, grabens and normal faults developed well distributed and spaced throughout the experiment. In models set up with thinner silicone layers, the silicone structures were geometrically asymmetrical, such as rollers, and were less distributed and more localized along the experiment. In models that simulated gravity-driven deformation, silicone mobility enabled the formation of different structures in the proximal, transitional, and distal domains. In general, the structures formed in the distal domain evolved more slowly and gradually, while the structures formed in the transitional and proximal domains developed later, but at an accelerated rate when filled with silicone. Also, gravity‐driven models displayed dominant trends, each one characterized by different structural styles. In the proximal domain, continuous silicone walls and perpendicular to the direction of the silicone flow were nucleated, which in profile exhibit symmetrical shapes with rectilinear lateral terminations. In contrast, in the distal domain the diapirs imitate the geometry of sigmoidal grabens showed curvilinear shapes and asymmetrical profiles. The physical models developed in this research made it possible to visualize and characterize the evolution of individual salt structures, as well as the recognition of different patterns of salt flow according to the structural regime in effect.

BANKING MEMBERS:
Externo ao Programa - 2490483 - ALEX FRANCISCO ANTUNES
Externa ao Programa - 1884342 - DEBORA DO CARMO SOUSA
Presidente - 1217847 - FERNANDO CESAR ALVES DA SILVA
Externo à Instituição - LEONARDO MUNIZ PICHEL - UiB