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Tombador Formation

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(a) Simplified tectonic map on top of the prerift Sergi <b>Formation</b> for the R...
Published: 01 July 2003
Figure 4 (a) Simplified tectonic map on top of the prerift Sergi Formation for the Recôncavo rift (modified from Aragão, 1994 ). Release faults: the south Mata-Catu and Itanagra-Araçás release faults are related to the Salvador parent fault. The north Mata-Catu release fault, however
Image
SHRIMP (sensitive high resolution ion microprobe) detrital zircon  207 Pb/ ...
in > Geology
Published: 01 July 2016
Figure 3. SHRIMP (sensitive high resolution ion microprobe) detrital zircon 207 Pb/ 206 Pb ages for the green clasts from the Lavras conglomerate of the Tombador Formation (Brazil) (purple) and a fuchsitic quartzite from the Jacobina Group (tan).
Image
A: Location of study area in Bahia state, Brazil. Espinhaço Supergroup is i...
in > Geology
Published: 01 March 2016
Figure 1. A: Location of study area in Bahia state, Brazil. Espinhaço Supergroup is in light gray; in the detail, the Tombador Formation is in darker gray. Star shows the location of the studied area north of the locality of Lençóis. B: Google Earth™ image of area of the studied outcrops (access
Image
Uranium precipitation and dissolution age curves required to yield the  Ozi...
in > Geology
Published: 01 July 2016
Guadagnin et al. (2015) . The temporal pairing of the maximum deposition age of the Tombador green quartzite clasts and the deposition age of the Tombador Formation represents the simplest model for when uranium was precipitated in and dissolved from carbonado.
Journal Article
Journal: Geology
Published: 01 July 2016
Geology (2016) 44 (7): 527–530.
...Figure 3. SHRIMP (sensitive high resolution ion microprobe) detrital zircon 207 Pb/ 206 Pb ages for the green clasts from the Lavras conglomerate of the Tombador Formation (Brazil) (purple) and a fuchsitic quartzite from the Jacobina Group (tan). ...
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Journal Article
Journal: AAPG Bulletin
Published: 15 October 2020
AAPG Bulletin (2020) 104 (10): 2029–2050.
... , 2016 , Sequence hierarchy in a Mesoproterozoic interior sag basin: From basin fill to reservoir scale, the Tombador Formation, Chapada Diamantina Basin, Brazil : Basin Research , v.  28 , no.  3 , p.  393 – 432 , doi: 10.1111/bre.12117 . Martin , J. T. , and R. P. Lowell , 2000...
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Journal Article
Journal: Geology
Published: 01 March 2016
Geology (2016) 44 (3): 203–206.
...Figure 1. A: Location of study area in Bahia state, Brazil. Espinhaço Supergroup is in light gray; in the detail, the Tombador Formation is in darker gray. Star shows the location of the studied area north of the locality of Lençóis. B: Google Earth™ image of area of the studied outcrops (access...
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Journal Article
Published: 01 January 2010
European Journal of Mineralogy (2010) 22 (1): 35–47.
... of decreasing carbon supersaturation. The temperature decrease serves as a plausible driving force for crystallisation. During the second stage of carbonado formation, mass crystallisation of diamond has occurred. The necessary C supersaturation was likely caused by crystallisation of other minerals, leading...
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Series: Geological Society, London, Special Publications, Geological Society, London, Special Publications
Published: 01 January 2008
DOI: 10.1144/SP294.3
EISBN: 9781862395428
... of the formation, closely-spaced argillaceous levels herald a new sea-level elevation (see Shaney & McCabe 1994 ; Pedreira 2003 ), an event that began with deposition of the Guiné Formation and closed with deltaic deposits that characterize a regression ( Pedreira 1995 ). The Tombador–Caboclo depositional...
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Journal Article
Journal: AAPG Bulletin
Published: 01 July 2003
AAPG Bulletin (2003) 87 (7): 1123–1144.
...Figure 4 (a) Simplified tectonic map on top of the prerift Sergi Formation for the Recôncavo rift (modified from Aragão, 1994 ). Release faults: the south Mata-Catu and Itanagra-Araçás release faults are related to the Salvador parent fault. The north Mata-Catu release fault, however...
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Journal Article
Published: 07 March 2019
Geological Magazine (2019) 156 (10): 1715–1741.
... . 2010 ; Maravelis et al . 2016 ). In the NSB, the examined lithostratigraphic units include (from oldest to youngest) the Waratah Sandstone and the Lambton, Adamstown and Boolaroo sub-groups. These sub-groups are further subdivided into several formations and members ( Fig. 2 ). Thirteen outcrops...
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Journal Article
Published: 01 May 2016
Russ. Geol. Geophys. (2016) 57 (5): 653–671.
... Chapada Diamantina . VII Simposio Nacional de Estudos Tectonicôs , Len#x00E7;ois , pp. 118 – 120 . Battilani , G.B. , Vasconcellos , P.M. , Gomes , N.S. , Guerra , W.J. , 2005 . Geochronological data of dikes and sills intruding Proterozoic sequences of the Tombador Formation...
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Series: GCSSEPM, GCSSEPM
Published: 01 December 2015
DOI: 10.5724/gcs.15.34.0576
EISBN: 978-1-944966-00-3
... Diamantina diamonds, famous since the XIX Century, occur on Mesoproterozoic conglomerates of Tombador and Morro do Chapéu formations over a 300 km broad area ( Dardenne and Schobbenhaus, 2003 ). Diamonds are stable only at depths of at least 150 (lithospheric) or at least 250 km (sub-lithospheric) ( Shirey...
Journal Article
Published: 01 October 2011
European Journal of Mineralogy (2011) 23 (5): 721–729.
... formation ( Trueb & de Wys, 1969 ; Gorshkov et al ., 2000 ; De et al ., 2001 ); (ii) inclusions of crustal minerals (florencite, orthoclase, gehlenite, kaolinite, magnetite and quartz) lining the pore spaces and the grain boundaries. Such inclusions therefore postdate carbonado formation ( Heaney...
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Journal Article
Journal: AAPG Bulletin
Published: 01 October 1962
AAPG Bulletin (1962) 46 (10): 1773–1814.
... metasedimentites display a low-grade metamorphism that nowhere exceeds that of the biotite-chlorite subfacies of the greenschist facies. Apotectonic intrusions are absent in the north and scarce in the south. The Late Precambrian rocks form, at present, the Minas Group and the Itacolomi Formation of Minas Gerais...
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