Zobrazeno 1 - 10
of 89
pro vyhledávání: '"JEAN MICHEL LAFON"'
Autor:
Nayra Michelly das Chagas Souza, Jean Michel Lafon, João Marinho Milhomem Neto, Joelson Lima Soares
Publikováno v:
Brazilian Journal of Geology, Vol 54, Iss 1 (2024)
Abstract On the southern edge of the Amazonian Craton, the Mirassol d’Oeste and Guia formations constitute the cap carbonate of the Araras Group. Petrography, X-ray diffraction, and quantification of terrigenous material allowed the identification
Externí odkaz:
https://doaj.org/article/20d101bf4bf040a394213536f22a7c54
Publikováno v:
Journal of the Geological Survey of Brazil, Vol 3, Iss 2 (2020)
The gold mineralization at the Enche Concha and Tunel prospects, northwestern portion of the Gurupi Belt, is hosted in dacites and phyllites that belong to the ca. 2160 Ma-old metavolcano-sedimentary Chega Tudo Formation. These host rocks are variabl
Externí odkaz:
https://doaj.org/article/e6f189ea661d406087ed043313d8d291
Autor:
Cinthya Deus Souza, Maria Zélia Aguiar Sousa, Amarildo Salina Ruiz, Maria Elisa Fróes Batata, Ana Flávia Nunes Brittes, Jean Michel Lafon
Publikováno v:
Geochimica Brasiliensis, Vol 30, Iss 2, Pp 136-157 (2017)
The Serra da Bocaina Formation comprises Paleoproterozoic effusive and pyroclastic rocks displaying well preserved textures related to a plutonic-volcanic event recorded in the southern of the Amazonian Craton in the Rio Apa Terrane. This record sits
Externí odkaz:
https://doaj.org/article/c9777712903e400585a3f88248a05abf
Autor:
Gabriela dos Santos, Amarildo Salina Ruiz, Maria Zélia Aguiar de Souza, Maria Elisa Fróes Batata, Rafael Ferreira Cabrera, Jean-Michel Lafon
Publikováno v:
Geologia USP. Série Científica, Vol 19, Iss 1 (2019)
O Granito Coimbra representa parte do embasamento da região de Corumbá, Mato Grosso do Sul. Esse corpo é composto das fácies porfirítica rosa, média a grossa cinza e fina rosa. Uma fase de deformação de caráter compressivo (F1) gerou uma fol
Externí odkaz:
https://doaj.org/article/2923377d8c3946de85c4980a644ff2d0
Autor:
Fábio Santos Pereira, Herbet Conceição, Maria de Lourdes Silva Rosa, Moacyr Moura Marinho, Colombo Celso Gaeta Tassinari, João Marinho Milhomem Neto, Jean-Michel Lafon
Publikováno v:
Geoscience Frontiers. 14:101626
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::038db49a4c4c71d9abcc5ed594273536
https://doi.org/10.1016/j.gsf.2023.101626
https://doi.org/10.1016/j.gsf.2023.101626
Autor:
Elma Costa Oliveira, Jean Michel Lafon, José Augusto Martins Corrêa, Jully Hellen dos Santos Carvalho, Fabiana Ferrari Dias, Maria Helena Tirolo Taddei
Publikováno v:
Geochimica Brasiliensis, Vol 29, Iss 2, Pp 139-153 (2016)
Um estudo granulométrico, mineralógico e geoquímico dos sedimentos de fundo da margem oeste da baía do Guajará e do rio Carnapijó foi realizado para contribuir no monitoramento da degradação ambiental gradativa do sistema estuarino da região
Externí odkaz:
https://doaj.org/article/221933ebfc6c45c88a8e6abc956a6f54
Autor:
Zorano Sérgio de Souza, Frederico Castro Jobim Vilalva, Elton Luiz Dantas, Jean-Michel Lafon, Francisco Valdir Silveira, Joyce Lorena Oliveira
Publikováno v:
Journal of Petrology. 63
Located on the western continental tip of the Fernando de Noronha transform fracture (FNTF), northeastern Brazil, the Eocene–Oligocene Mecejana Phonolitic Province (MPP) was subjected to a multi-methodological study, comprising field and microscopi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19ab9246e88300d165b0f4ffd092412b
https://doi.org/10.1093/petrology/egac051
https://doi.org/10.1093/petrology/egac051
Publikováno v:
Boletim do Museu Paraense Emílio Goeldi. Ciências Naturais, Vol 8, Iss 2, Pp 177-203 (2013)
This work presents mineralogical, geochemical and Pb isotope compositions of heavy metals from overbank sediments of the Amapari river and its tributaries, in the region of Serra do Navio, central Amapá. The sediments are mainly composed of quartz,
Externí odkaz:
https://doaj.org/article/cad135ae83d444798c3b9ace35cb4f17
Autor:
Lúcia Travassos da Rosa Costa, Evandro Fernandes de Lima, Jean Michel Lafon, Carla Joana Santos Barreto
Publikováno v:
Geologia USP. Série Científica, Vol 13, Iss 1, Pp 47-72 (2013)
The Iricoumé group consists of very well preserved pyroclastic and effusive volcanic rocks as a part of an extensive volcano-plutonic event, which marked the central part of the Amazonian craton during the Orosirian. Such rocks occur in the southern
Externí odkaz:
https://doaj.org/article/a047e17cf9ab45bab5d34d40c9a545f2
Autor:
Evandro Fernandes de Lima, Jean Michel Lafon, Carlos Augusto Sommer, Carla Joana Santos Barreto, Carla Cecília Treib Sarmento, Rossetti Lucas de Magalhães May
Publikováno v:
Geological Journal. 56:1143-1166
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe830e5ed2ebec7215ce5fb0631840fb
https://doi.org/10.1002/gj.3993
https://doi.org/10.1002/gj.3993