Bauxitisation of anorthosites from Central Brazil

Autor: Fábio Soares de Oliveira, Bruno Boulangé, Newton Souza Gomes, César Augusto Chicarino Varajão, Angélica Fortes Drummond Chicarino Varajão

Publikováno v: Geoderma. :319-327

Petrological studies using X-ray diffraction (XRD), X-ray fluorescence (XRF), optical microscopy, scanning electron microscopy (SEM-EDS) and electron microprobe analyzer (WDS) showed the mineralogical, micromorphological and geochemical transformatio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4ab9c29d60dd4626084803523b7d542b
https://doi.org/10.1016/j.geoderma.2011.09.006

Characterization and origin of spongillite-hosting sediment from João Pinheiro, Minas Gerais, Brazil

Autor: Cecília Volkmer-Ribeiro, Newton Souza Gomes, A.C.S. Almeida, César Augusto Chicarino Varajão, Angélica Fortes Drummond Chicarino Varajão

Publikováno v: Repositório Institucional da UFOP
Universidade Federal de Ouro Preto (UFOP)
instacron:UFOP

Spongillite from Joao Pinheiro, Minas Gerais, Brazil is mainly known for its use in brick production and in the refractory industry. Very few studies have focused on its geological context. Spongillite-rich deposits occur in shallow ponds on a karsti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::feaee2bace0318d162355ae6675c1030
https://doi.org/10.1016/j.jsames.2009.09.006

Infrared study of OH sites in tourmaline from the elbaite-schorl series

Autor: Cristiane Castañeda, Antônio Carlos Pedrosa Soares, Ester Figueiredo de Oliveira, Newton Souza Gomes

Publikováno v: American Mineralogist. 85:1503-1507

Two different behaviors controlled by local lattice environment of crystallization are observed in the IR spectra of polycrystalline natural tourmalines from the elbaite-schorl series in the O-H stretching region (3800–3100 cm −1 ). The first cas

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::96434d870e1ba1d7eb1c90fe7dbbc64a
https://doi.org/10.2138/am-2000-1021

FÁCIES GLACIOCONTINENTAIS (OUTWASH PLAIN) NA MEGASSEQUÊNCIA MACAÚBAS ,(SERRA DA ÁGUA FRIA/MG) E SEU CONTEXTO TECTÔNICO

Autor: MARCELO A. MARTINS-NETO, NEWTON SOUZA GOMES, CÍZIA M. HERCOS, LUCIANA A. REIS

Publikováno v: Revista Brasileira de Geociências. 29:179-188

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fe0a92fa491ee70882ae8c6086c766e6
https://doi.org/10.25249/0375-7536.199929179188

Geomorphological domains of spongillite deposits occuring in the João Pinheiro region, Minas Gerais State, Brazil

Autor: Ariana Cristina Santos Almeida, Newton Souza Gomes, Cecília Volmer-Ribeiro, César Augusto Chicarino Varajão, Angélica Fortes Drummond Chicarino Varajão

Publikováno v: Rem: Revista Escola de Minas v.64 n.3 2011
REM. Revista Escola de Minas
Escola de Minas
instacron:ESCOLA DE MINAS
Rem: Revista Escola de Minas, Volume: 64, Issue: 3, Pages: 299-304, Published: SEP 2011
Repositório Institucional da UFOP
Universidade Federal de Ouro Preto (UFOP)
instacron:UFOP

Importantes processos erosivos após o Cretáceo foram responsáveis pela evolução da paisagem na região de João Pinheiro, onde ocorrem os depósitos de espongilito. O avanço desses processos, aliados às rochas carbonáticas do substrato, permi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::85b180bcefda6193d7778d9cd70526ff
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672011000300007