Talc-bearing Metadolomites of the Itaiacoca Group, Paraná (Southern Brazil): Fluid Regime and Genetic Implications

Autor: Danilo Marques Saunite, Rosa Maria da Silveira Bello, Fábio Ramos Dias de Andrade, Gergely Andrés Julio Szabó

Publikováno v: Geologia USP. Série Científica, Vol 11, Iss 1, Pp 171-187 (2011)

Brazil’s largest talc deposits occur in the Itaiacoca Group, which is a low-grade metasedimentary belt composedmainly of dolomitic rocks. Fluid inclusions from three geological settings in which talc was formed differently wereanalysed. Talc schist

Externí odkaz: https://doaj.org/article/b9a05c2bba8a49a98a150023f5661ea5

Jazida de cobre de Surubim, Vale do Curuca, BA: mineralogia, petrografia e petrogenese

Autor: Rosa Maria da Silveira Bello

Publikováno v: Biblioteca Digital de Teses e Dissertações da USPUniversidade de São PauloUSP.

O depósito de cobre de Surubim, com reservas de 14 milhões de toneladas a 0,8% Cu, faz parte da província cuprífera do Vale do Rio Curaçá, localizada na parte norte-nordeste do Estado da Bahia. Ocupa uma área delimitada pelos paralelos 9° 34\

Externí odkaz: http://www.teses.usp.br/teses/disponiveis/44/44135/tde-30092013-160340/

Evolution of brines and CO2-rich fluids and hydrothermal overprinting in the genesis of the Borrachudo copper deposit, Carajás Province

Autor: Lucas Calabrez Gloeden Gonçales, Lena Virgínia Soares Monteiro, Rosa Maria da Silveira Bello, Mariângela Previato

Publikováno v: Ore Geology Reviews. 121:103561

The Carajas Province is one of the world’s major domains of iron oxide-copper-gold (IOCG) deposits, which formed during the Neoarchean (ca. 2.70–2.68 Ga and ca. 2.57 Ga). The province also hosts other copper-gold deposits of Paleoproterozoic age

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::93151878558ce94deef09f152e5ffe0f
https://doi.org/10.1016/j.oregeorev.2020.103561

Mineralogical and microthermometric studies and structural aspects of imperial topaz mineralization in Antônio Pereira, Ouro Preto District (Minas Gerais) - Brazil

Autor: Antonio Luciano Gandini, Arol Josue Rojas, Issamu Endo, Rosa Maria da Silveira Bello

Publikováno v: Repositório Institucional da UFOP
Universidade Federal de Ouro Preto (UFOP)
instacron:UFOP
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP

Las ocurrencias de topacio imperial de la mina de Antônio Pereira, Ouro Preto, MG, están asociadas a rocas carbonáticas metamórficas del Supergrupo Minas. La densidad del topacio varió desde 3,46 hasta 3,58. Los parámetros de celda unitária so

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c6d2f7f12cba046baa02737a746adc6d
https://doi.org/10.1590/s0370-44672009000100003

Sn-polymetallic greisen-type deposits associated with late-stage rapakivi granites, Brazil: fluid inclusion and stable isotope characteristics

Autor: Jorge Silva Bettencourt, Claudio Luis Goraieb, Rosa Maria da Silveira Bello, B. L. Payolla, Irena Sparrenberger, Washington Barbosa Leite

Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP

Tin-polymetallic greisen-type deposits in the Itu Rapakivi Province and Rondonia Tin Province, Brazil are associated with late-stage rapakivi fluorine-rich peraluminous alkali-feldspar granites. These granites contain topaz and/or muscovite or zinnwa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::691ee167606684eaab07cb4dd0b42852
https://doi.org/10.1016/j.lithos.2004.03.060