Banca de DEFESA: MARIA EUGÊNIA FERREIRA CAMPOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MARIA EUGÊNIA FERREIRA CAMPOS
DATE: 27/10/2022
TIME: 14:00
LOCAL: Remoto Plataforma Microsoft Teams
TITLE:

DEFORMATION ASSOCIATED WITH THE ALKALINE-CARBONATITIC INTRUSION OF TAPIRA, MINAS GERAIS

KEY WORDS:

Deformation, Tapira Alkaline-carbonatitic Complex, igneous intrusion, structural dome

PAGES: 106
BIG AREA: Engenharias
AREA: Engenharia de Minas
SUBÁREA: Pesquisa Mineral
SPECIALTY: Caracterização do Minério
SUMMARY:

The Tapira Alkaline-Carbonatitic Complex is a domic intrusion, with an elliptical shape on the surface, approximately 6.5km in diameter and 35km² in area, resulting from the amalgamation of two ultrabasic magma intrusions, five of carbonatite and one of syenite, occurring embedded in quartzites and pre-Cambrian shales of the Canastra Group. Located 35km southwest of Araxá, the Tapira complex has great economic relevance as it houses the largest phosphate rock mining in Brazil, also having residual deposits with no current economic use of niobium, titanium and rare earths, which are located in the mantle of weathering . This complex is the result of a regional magmatic event that gave rise to a set of intrusive circular structures aligned for more than 1000km in the NW-SE direction and pyroclastic flows of kamafugitic affiliation, known as the Alto Paranaíba Igneous Province (APIP). The structural features recognized in the surroundings of the complex show that the spatial attitude of the main foliation of the enclosing rocks, of Neoproterozoic origin, was modified by the intrusion process, where low angle dips to steep dips are observed, with ring patterns around the dome. The detailed structural mapping will allow to know the deformational effects caused by the process of igneous rise of the domic intrusion originating in the complex. Understanding the structural framework of the region's lithologies may be a subsidy for future studies on the hydrogeological behavior of fissured aquifers in the region, as well as for mine planning, construction of dams and other structures supported on the rock mass, especially those built by fertilizer mining company, currently MOSAIC.

BANKING MEMBERS:
Presidente - HILDOR JOSE SEER
Interno - ALLAN ERLIKHMAN MEDEIROS SANTOS
Externa à Instituição - MARIA EUGÊNIA SILVA DE SOUZA - UFOP
Externo à Instituição - CARLOS HUMBERTO SILVA - UFMT