1-20 OF 37 RESULTS FOR

Chapada Diamantina Group

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: Geological Society, London, Memoirs, Geological Society, London, Memoirs
Published: 01 January 2011
DOI: 10.1144/M36.47
EISBN: 9781862394117
... metasedimentary rocks of the Chapada Diamantina Group. The overlying carbonate succession (Salitre Fm.) is informally subdivided into five mappable units. Unit C, at the base, is composed of red argillaceous dolostone with typical negative δ 13 C signatures averaging –5.1‰ (VPDB). Unit B consists of grey...
FIGURES | View All (5)
Journal Article
Journal: Clay Minerals
Published: 01 September 2015
Clay Minerals (2015) 50 (4): 431–440.
... or gently undulating with large flat areas known as chapadas (‘high plains’) that are dissected by rivers forming swamps known locally as veredas (‘paths’). The present study is concerned mainly with a representative toposequence in the watershed of the Lagoa do Leandro vereda, a swamp near the city...
Series: Geological Society, London, Memoirs, Geological Society, London, Memoirs
Published: 01 January 2011
DOI: 10.1144/M36.49
EISBN: 9781862394117
.... 660 Ma. It was orogenically inverted during the late Neoproterozoic Brasiliano event. The Macaúbas Group includes the pre-glacial Matão, Duas Barras and Rio Peixe Bravo formations, the glaciogenic Serra do Catuni, Nova Aurora and Lower Chapada Acauã formations, and the post-glacial Upper Chapada Acauã...
FIGURES | View All (5)
Journal Article
Journal: Geology
Published: 01 February 2013
Geology (2013) 41 (2): 163–166.
.... Here we report the application of the U/Th– 4 He method to the direct dating of gold from the historically important gold deposit in Diamantina, Minas Gerais, Brazil. The U/Th– 4 He age of 515 ± 55 Ma for the Diamantina gold is corroborated by a new U/Pb age of 524 ± 16 Ma for rutile recovered from...
FIGURES
Journal Article
Published: 01 May 2016
Russ. Geol. Geophys. (2016) 57 (5): 653–671.
... of the Chapada Diamantina and Curaça dikes of the SFC can be linked to that of Groups 1 and 2, respectively, of the Kuonamka LIP and are consistent with a common mantle source between EMORB and OIB and subsequent differentiation history. However, the coeval Humpata sills and dikes of the Angola block...
FIGURES | View All (10)
Journal Article
Journal: Economic Geology
Published: 01 December 2009
Economic Geology (2009) 104 (8): 1265–1276.
... indicates that there is a prospective trend of about 240 km for Pd-Pt-bearing gold mineralization reaching from Ouro Preto to Diamantina. The very high oxidation state required for efficient low-temperature aqueous mobilization of Pt, Pd, and Au was apparently controlled by the quartzitic and hematitic...
FIGURES | View All (4)
Journal Article
Published: 01 April 2015
Mineralogical Magazine (2015) 79 (2): 269–283.
...: Evolução da Obra de Fernando Flávio Marques de Almeida . São Paulo , Beca , 647 pp. Martins A.A.M. Andrade Filho E.L.A Loureiro H.S.C. Arcanjo J.B.A. Guimarães R.V.B. ( 2008 ) Geologia da Chapada Diamantina Oriental (Projeto Ibitiara - Rio de Contas) – Série Arquivos...
FIGURES | View All (9)
Journal Article
Published: 01 December 2013
Mineralogical Magazine (2013) 77 (8): 3197–3215.
... determined for hematitic phyllite within the São João da Chapada Formation near Diamantina. The hematitic phyllite is a metamorphosed and metasomatized volcanic rock ( Cabral et al ., 2012 ). The coincident ages for the hematitic phyllite from the São João da Chapada Formation and the metarhyolite from...
FIGURES | View All (9)
Series: Geological Society, London, Special Publications, Geological Society, London, Special Publications
Published: 01 January 2008
DOI: 10.1144/SP294.3
EISBN: 9781862395428
... dos Remédios, Paraguaçu and Chapada Diamantina groups, modified from Pedreira (1994) and Pedreira & Rocha (2004) . Several sedimentary successions occur on the Congo Craton (Fig.  2 ), from west to east, the Chela Group in Angola, the Kibaran Supergroup in the Mesoproterozoic Kibaran Belt...
FIGURES | View All (10)
Image
Selected elements plotted against MgO. FeO T  represents total iron calcula...
Published: 01 May 2016
Fig. 5. Selected elements plotted against MgO. FeO T represents total iron calculated as FeO. 1 , Group 1; 2 , Group 2; 3 , Chapada Diamantina dikes; 4 , Curaçá dikes; 5 , Angola sills and dikes.
Journal Article
Published: 01 February 2018
Mineralogical Magazine (2018) 82 (1): 133–144.
... , E.L.A , Loureiro , H.S.C. , Arcanjo , J.B.A. and Guimarães , R.V.B. ( 2008 ) Geologia da Chapada Diamantina Oriental (Projeto Ibitiara – Rio de Contas) . Série Arquivos Abertos 31 – CPRM (Serviço Geológico do Brasil) and CBPM (Companhia Baiana de Pesquisa Mineral), Salvador, 64 pp...
FIGURES | View All (7)
Image
Data plotted on diagrams from  Pearce (2008) . The red squares and blue dia...
Published: 01 May 2016
(Group 1 and Group 2) and SFC data (Chapada Diamantina and Curaçá dikes) are interpreted as mantle melts (with composition between E-MORB and OIB) with only minor contamination by continental crust or metasomatized lithospheric mantle. In contrast the Angola data (from the Congo craton) exhibits
Journal Article
Journal: Palynology
Published: 01 July 2016
Palynology (2016) 40 (2): 280–288.
... (FAPERJ) for financial support of this study; and CNPq and Conselho Nacional de Pesquisa e Tecnologia (CNPq) and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) for the fellowship awarded to the authors. Paralychnophora atkinsiae D.J.N. Hind – Chapada de Diamantina...
FIGURES
Journal Article
Journal: Palynology
Published: 02 January 2019
Palynology (2019) 43 (1): 43–52.
... Gerais, Fazenda Córrego Bonito, 08/IX/1961, Andrade, L.A.G. 1150 & Emmerich, M. 1111 (R). P. constellata Arbo – BRAZIL: Bahia, Rio de Contas, estrada para Brumadinho, proximidade da fazenda, Chapada da Diamantina, 26/IX/2005...
FIGURES | View All (6)
Journal Article
Journal: AAPG Bulletin
Published: 01 October 1962
AAPG Bulletin (1962) 46 (10): 1773–1814.
...Horacio J. Harrington ABSTRACT The post-Proterozoic geologic history of South America was controlled by the distribution and interplay of certain major geotectonic units, classed in five groups, which form the structural framework of the continent: cratons (Guiana, Central Brazilian, and Coastal...
FIGURES | View All (34)
Image
Selected geochemical diagrams for mafic dikes and sills of the Kuonamka LIP...
Published: 01 May 2016
Fig. 6. Selected geochemical diagrams for mafic dikes and sills of the Kuonamka LIP—Group 1 (red squares) and Group 2 (blue diamonds). For comparison, fields of data are also shown for age-equivalent mafic intrusive units from the São Francisco craton (SFC): Chapada Diamantina (red line
Journal Article
Journal: Geology
Published: 01 July 2016
Geology (2016) 44 (7): 527–530.
...) of Brazil ( Derby and Branner, 1905 ). Stratigraphically, the Chapada Diamantina Group occurs as the upper section of the Espinhaço Supergroup in the Chapada Diamantina region, where the sandstones and conglomerates of the Tombador Formation crop out. These Mesoproterozoic sediments overlie a basement...
FIGURES | View All (4)
Journal Article
Journal: Geology
Published: 01 March 2016
Geology (2016) 44 (3): 203–206.
... of sedimentation of mud, possibly also related to lower production in the source areas and stronger selective removal by eolian processes (e.g., Dalrymple et al., 1985 ). The Tombador Formation is the lowermost unit of the Chapada Diamantina Group (Espinhaço Supergroup), of Mesoproterozoic age ( Pedreira...
FIGURES | View All (5)
Journal Article
Journal: AAPG Bulletin
Published: 15 October 2020
AAPG Bulletin (2020) 104 (10): 2029–2050.
... Group ( Magalhães et al., 2016 ), and an Archean crystalline basement ( Trompette et al., 1992 ). The carbonates of the Salitre Fm. are presently preserved in an inverted rift basin bounded to the west and east by two anticlines exposing quartzites of the Chapada Diamantina Group ( Figure 1A...
FIGURES | View All (15)
Journal Article
Journal: Geology
Published: 01 April 2001
Geology (2001) 29 (4): 319–322.
... of Brazil, illustrating distribution of cratons and of Brasiliano (Neoproterozoic) orogen belts. Inset shows location of map. A—Araçuaí belt, AR—Araguaia belt, BP—Borborema province, CD—Chapada Diamantina, DFB—Dom Feliciano belt, GM—Goiás massif, NB—Northern Brasília belt, P—Paraguai belt, PC—Paramirim...
FIGURES