Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Roberto Perez Xavier"'
Publikováno v:
Brazilian Journal of Geology, Vol 49, Iss 1 (2019)
Abstract The Cristalino deposit is located 40 km east of Sossego mine, Carajás. The orebody lies along a NW-SE-striking shear zone and is mainly hosted by the Neoarchean bi-modal volcanics of the Grão Pará Group. Field work and petrographic data s
Externí odkaz:
https://doaj.org/article/c248e26ca6b94b659ba4ff725be49415
Autor:
Rodrigo Prudente de Melo, Richard J. Goldfarb, Roberto Perez Xavier, Craig A. Johnson, Erin E. Marsh, Leah E. Morgan, Marcos Aurélio Farias de Oliveira, Leandro Rocha de Oliveira
Publikováno v:
Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Made available in DSpace on 2022-04-28T19:47:55Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-01-01 The Alto Guaporé gold province, southwestern Amazon craton, contains gold deposits that have been mined since the beginning of the 18th cent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::936c00c910699f62a40934fd37dc5ba2
https://doi.org/10.5382/econgeo.4852
https://doi.org/10.5382/econgeo.4852
Autor:
Laryssa de Sousa Carneiro, Carolina Penteado Natividade Moreto, Lena Virgínia Soares Monteiro, Roberto Perez Xavier
Publikováno v:
SSRN Electronic Journal.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2271542fddc1e599198f949f692350a
https://doi.org/10.2139/ssrn.4080118
https://doi.org/10.2139/ssrn.4080118
Autor:
Roberto Perez Xavier
Publikováno v:
Biblioteca Digital de Teses e Dissertações da USPUniversidade de São PauloUSP.
Na porção do Cráton do São Francisco, no Estado da Bahia, foi definido um grupo de rochas supracrustais vulcano-sedimentares fortemente deformadas e intrudidas por domos granito-gnáissicos, que vieram a caracterizar o \"Greenstone Belt\" do Rio
Publikováno v:
Journal of South American Earth Sciences. 92:481-505
The Cristalino deposit, located in the Serra do Rabo region (Para State, Brazil), is related to a hydrothermal system in which two major alteration stages could be distinguished most likely with the involvement of a hyper-saline fluid. The first stag
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7911365cc6b157260ad5d36f510ebcc1
https://doi.org/10.1016/j.jsames.2019.02.009
https://doi.org/10.1016/j.jsames.2019.02.009
Autor:
Gustavo Henrique Coelho de Melo, Poliana Toledo, Jian-Feng Gao, Roberto Perez Xavier, Carolina Penteado Natividade Moreto, José Henrique da Silva Nogueira de Matos
Publikováno v:
Economic Geology. 114:1-34
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7aa8d8142060e8fdd829b9622fc201ab
https://doi.org/10.5382/econgeo.2019.4617
https://doi.org/10.5382/econgeo.2019.4617
Autor:
Steffen G. Hagemann, J. Cliff, Érika Suellen Barbosa Santiago, Roberto Perez Xavier, Lena Virgínia Soares Monteiro
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
Multiple sulfur isotopes in sulfides were measured by in situ Secondary Ion Mass Spectrometry in order to constrain sulfur sources and pathways, as well as explore atmosphere–ore genesis implications on the metallogeny of the Neoarchean and Paleopr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3982084f798877c02099b8399e301c90
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
Instituto de Geociencias e Ciencias Exatas Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Avenida 24 A, No. 1515
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a4cf88586a0ee3149e4afab7f16fdee2
https://doi.org/10.5382/econgeo.2017.4535
https://doi.org/10.5382/econgeo.2017.4535
Autor:
Veronica G. Trevisan, Jian-Feng Gao, Anthony I.S. Kemp, Rafael Rodrigues de Assis, Robert R. Loucks, Andreas Petersson, João Gabriel Motta, Roberto Perez Xavier, Steffen Hagemann, Luis A. Parra-Avila
Publikováno v:
Precambrian Research. 364:106324
The Alta Floresta Mineral Province (AFMP), southern Amazonian Craton, experienced extensive magmatic activity from ca. 2.03 to 1.75 Ga in an uncertain geodynamic setting. New and pre-existing geological, petrographic, geochemical, and zircon geochron
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bbf4837b45b85b2d4e2ce660ecb69e84
https://doi.org/10.1016/j.precamres.2021.106324
https://doi.org/10.1016/j.precamres.2021.106324
Publikováno v:
Journal of the Geological Survey of Brazil, Vol 2, Iss 1 (2019)
In SW Amazon Craton, along the boundary between the Ventuari-Tapajós (1.9 to 1.8 Ga) and the Rio Negro-Juruena (1.8 to 1.55 Ga) provinces, an association of volcanic rocks and related epizonal granitic plutons crop out as a volcanic belt with more t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c73dd3183f53533c898eaa43c13de92
https://jgsb.cprm.gov.br/index.php/journal/article/view/55
https://jgsb.cprm.gov.br/index.php/journal/article/view/55