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Casas Velhas Formation

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Journal Article
Published: 01 May 2010
Journal of the Geological Society (2010) 167 (3): 519-538.
... is necessary to place the older palaeo-markers close to or below the present sea level, as their resulting vertical displacement is somewhat less than the minimum Quaternary displacement of 75 m. For example, the Casas Velhas Formation has a passage zone between subaerial and submarine facies at 35–40 m a.s.l...
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Journal Article
Journal: GSA Bulletin
Published: 01 May 2012
GSA Bulletin (2012) 124 (5-6): 800-816.
... (Velhas), and less than 4 Ma for lower surfaces (Paraguaçu). Notably, the authors highlighted the major gaps in the record, pre–70 Ma and 30–15 Ma. Reburial of the higher surface by an Oligocene–Miocene cover provides a straightforward explanation for the gap in the weathering record between 30 and 15 Ma...
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Journal Article
Journal: Economic Geology
Published: 01 May 2004
Economic Geology (2004) 99 (3): 611-624.
.... These solutions were also likely responsible for the initial oxidation of the iron formations and the development of hematite I. Subsequent uplifted hot basement rocks or post-tectonic plutons were probable heat sources for the regional metamorphism and development of a granoblastic fabric of hematite II grains...
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Series: Reviews in Economic Geology
Published: 01 January 2008
DOI: 10.5382/Rev.15.09
EISBN: 9781629490229
... al., 1994 ). The Cambotas-Fundão system juxtaposed the Archean (Rio das Velhas Supergroup), Paleoproterozoic (Minas Supergroup), and Mesoproterozoic (Cambotas Formation) units. Herz ( 1978 ) recognized two types of metamorphism in units of the Minas Supergroup. One is related to regional...
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Journal Article
Published: 01 January 2015
Journal of the Geological Society (2015) 172 (1): 45-61.
... previously in an accretionary prism. Below this unit, the Lower Parautochthon is a less pervasively deformed tectonic slice including two lithostratigraphic units (Travanca and Vila Chã formations) composed of Culm-type synorogenic low-grade metasediments deposited in a tectonic trench located between...
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Journal Article
Published: 12 December 2017
Journal of Sedimentary Research (2017) 87 (12): 1285-1313.
... of carbonates ( Riding 2008 ; Wright and Barnett 2015 ) and clay minerals ( Calvo et al. 1999 ; Pozo and Casas 1999 ; Furquim et al. 2008 ), and the development of algae, ostracodes, and mollusks (bivalves or gastropods) ( Casanova 1986 ; Renaut et al. 1986 ; Vincens et al. 1986 ; Harris et al. 1994...
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Journal Article
Journal: Economic Geology
Published: 01 June 2017
Economic Geology (2017) 112 (4): 941-982.
... the footwall. The significant chemical influence and importance of country-rock lithologies as a possible elemental source, for example, must be taken into account when interpreting whole-rock geochemical data and investigating an itabirite-/banded iron formation-hosted iron ore system. Geochronological...
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Journal Article
Journal: Lithosphere
Published: 30 June 2017
Lithosphere (2017) 9 (5): 726-744.
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