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Title: Evaluation of mafic dyke swarm continuity under the Joaquina dune field with ground magnetic survey
Other Titles: Investigação da continuidade do enxame de diques máficos sob as dunas da Joaquina usando magnetometria terrestre
Authors: Caminha-Maciel, George
Ernesto, Marcia
Borges, Welitom R.
Bresolin, Junior
Lemos, Reginaldo
Assunto:: Geofísica
Magnetometria
Santa Catarina
Issue Date: Jun-2017
Publisher: Sociedade Brasileira de Geologia
Citation: CAMINHA-MACIEL, George et al. Evaluation of mafic dyke swarm continuity under the Joaquina dune field with ground magnetic survey. Brazilian Journal of Geology, São Paulo, v. 47, n. 2, p. 237-247, abr./jun. 2017. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892017000200237&lng=en&nrm=iso>. Acesso em: 5 jan. 2018. Epub June 12, 2017. doi: http://dx.doi.org/10.1590/2317-4889201720170009.
Abstract: Um levantamento magnético terrestre foi realizado numa área do centro-leste da Ilha de Santa Catarina, para verificar a continuidade dos diques em subsuperfície na área das dunas da praia da Joaquina. Medidas de gradiente vertical em 1880 estações não revelaram nenhum sinal relacionado com anomalias magneticas produzidas por diques em subsuperfície. Quatro perfis localizados ao norte e sul da área principal de estudo detectaram a assinatura magnética de vários diques, alguns aflorantes (perfis-norte) mas também alguns em subsuperfície (perfis-sul). Estes resultados sugerem que os diques eram rasos e truncados e foram erodidos juntamente com o embasamento cristalino.
Abstract: A ground magnetic survey in a Central-East area of the Santa Catarina Island tested the continuity of the Cretaceous mafic dykes beneath the aeolic sediments of the Joaquina plain. Vertical gradient measurements taken in 1880 stations did not detect any magnetic anomaly related to subsurface dykes. Four magnetic profiles located to the north and south of the main area showed the magnetic signature of various dykes some of them already mapped (north profiles), but also some in subsurface (south profiles). These results suggest that the dykes probably were shallow and truncated, and were already eroded along with the crystalline basement.
Licença:: Brazilian Journal of Geology - This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0). Fonte: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892017000200237&lng=en&nrm=iso. Acesso em: 5 jan. 2018.
DOI: http://dx.doi.org/10.1590/2317-4889201720170009
Appears in Collections:IG - Artigos publicados em periódicos

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