Brasil | Artículos de revistas

The complex impact structure Serra da Cangalha, Tocantins State, Brazil

dc.creatorKenkmann, T
dc.creatorVasconcelos, MAR
dc.creatorCrosta, AP
dc.creatorReimold, WU
dc.date2011
dc.dateJUN
dc.date2014-07-31T13:53:33Z
dc.date2015-11-26T17:53:08Z
dc.date2014-07-31T13:53:33Z
dc.date2015-11-26T17:53:08Z
dc.date.accessioned2018-03-29T00:36:40Z
dc.date.available2018-03-29T00:36:40Z
dc.identifierMeteoritics & Planetary Science. Wiley-blackwell, v. 46, n. 6, n. 875, n. 889, 2011.
dc.identifier1086-9379
dc.identifierWOS:000292477100008
dc.identifier10.1111/j.1945-5100.2011.01199.x
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/74976
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/74976
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1290439
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionSerra da Cangalha is a complex impact structure with a crater diameter of 13,700 m and a central uplift diameter of 5800 m. New findings of shatter cones, planar fractures, feather features, and possible planar deformation features are presented. Several ring-like features that are visible on remote sensing imagery are caused by selective erosion of tilted strata. The target at Serra da Cangalha is composed of Devonian to Permian sedimentary rocks, mainly sandstones that are interlayered with siltstone and claystones. NNE-SSW and WNW-ESE-striking joint sets were present prior to the impact and also overprinted the structure after its formation. As preferred zones of weakness, these joint sets partly controlled the shape of the outer perimeter of the structure and, in particular, affected the deformation within the central uplift. Joints in radial orientation to the impact center did not undergo a change in orientation during tilting of strata when the central uplift was formed. These planes were used as major displacement zones. The asymmetry of the central uplift, with preferred overturning of strata in the northern to western sector, may suggest a moderately oblique impact from a southerly direction. Buckle folding of tilted strata, as well as strata overturning, indicates that the central uplift became gravitationally unstable at the end of crater formation.
dc.description46
dc.description6
dc.description875
dc.description889
dc.descriptionGerman Research Foundation (DFG) [Re 528/9-1, Re 528/11-1]
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionPh.D. grant
dc.descriptionGerman Academic Exchange Service (DAAD)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionGerman Research Foundation (DFG) [Re 528/9-1, Re 528/11-1]
dc.descriptionFAPESP [2008/53588-7]
dc.descriptionCNPq [30334/2009-0]
dc.languageen
dc.publisherWiley-blackwell
dc.publisherMalden
dc.publisherEUA
dc.relationMeteoritics & Planetary Science
dc.relationMeteorit. Planet. Sci.
dc.rightsaberto
dc.rightshttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dc.sourceWeb of Science
dc.subjectCentral Uplift
dc.subjectCrater
dc.subjectDome
dc.subjectGeology
dc.subjectEjecta
dc.subjectUtah
dc.titleThe complex impact structure Serra da Cangalha, Tocantins State, Brazil
dc.typeArtículos de revistas


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