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- W2320199427 abstract "This paper comprises the gravimetric analysis of a morfostructural anomaly in the city of Manaus, State of Amazonas, Brazil. This feature is characterized by a positive relief with a rounded signature well developed an approximately 4 km wide. The drainage has a ring and, less developed, radial pattern that differs form the context of the city, defined as dendritic form. The terrestrial gravimetric survey has shown that the structure has low values of Bouguer anomaly, which has been associated to the Alter do Chao sedimentary Formation. The high values of Bouguer anomaly at the south sector, was related to a dyke of mafic Penatecaua magmatism, with seems to have no direct relation to the morfostructure. With the purpose of indicating a possible origin to this feature the stands out on Manaus landscape, that is set on the inner part of the Amazon Basin and has undergone many mafic magmatic events (sills and dykes), it was chosen the model of hydrothermal vent complex, associated to the intrusive branching as a possible generation process for the geological element at the top of the lower unit, responsible for the formation of the structure, based on the differential compactation hypothesis, applied on early studies in other areas of Amazon Basin. Additionally, the relief system and drainage of the structure was studied in detail, and it has led to the conclusion that it’s an odd feature that marks the landscape of Manaus. The identification of important N-S and E-W structural trends, that fits in the neotectonic display of this region, deforms the morfostructure, placing this anomaly in an older age relatively to neotectonic events." @default.
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- W2320199427 date "2011-03-13" @default.
- W2320199427 modified "2023-09-27" @default.
- W2320199427 title "Análise Gravimétrica de uma anomalia morfoestrutural na área urbana de Manaus-AM, Brasil" @default.
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- W2320199427 doi "https://doi.org/10.1190/sbgf2011-111" @default.
- W2320199427 hasPublicationYear "2011" @default.
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