Paleozoic terranes of eastern Australia and the drift history of Gondwana

McElhinny, M. W.; Powell, Christine; Pisarevsky, Sergei A.

doi:10.1016/s0040-1951(02)00630-3

Cited by 145 publications

(73 citation statements)

References 51 publications

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“…These changes could be related with the contraction of the Rheic Ocean that culminated with the collision of NW Gondwana and south-eastern Laurentia at ca. 320 Ma (McElhinny et al, 2003). It is interesting to consider that during the span in which the southcentral Coastal Batolith was emplaced Gondwana remained in a relative stationary position (Oviedo and Vilas, 1984) in contrast with fast movements and rotations before and after that time (Geuna et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Geocronología U-Pb e isótopos de Hf-O en circones del batolito de la Costa Pensilvaniana, Chile.

Deckart

Hervé

Fanning

et al. 2014

Andgeo

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ABSTRACT. The Coastal Batholith of south-central Chile between latitudes 33° and 40°S is composed of calc-alkaline granitoids emplaced in a relatively restricted time period. New SHRIMP U-Pb zircon ages on eight quartzdioritic to granitic rocks collected over a distance of 800 km yielded ages between 300 and 320 Ma, Pennsylvanian (late Carboniferous). Lu-Hf isotopic analyses on the same zircon grains have initial εHf (i) values from +1.67 to -5.64. The δ 18 O ratios for that grains range from 6.4 to 8.6‰. These new isotopic data point to a relative homogeneous source with prominent components of the continental crust. The calculated Mesoproterozoic Depleted Mantel model ages, in addition to the short span of intrusive ages give insights to the position of the proto-Gondwana margin and the changing subduction mechanism at the end of late Paleozoic time.

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Section: Discussionmentioning

confidence: 99%

Geocronología U-Pb e isótopos de Hf-O en circones del batolito de la Costa Pensilvaniana, Chile.

Deckart

Hervé

Fanning

et al. 2014

Andgeo

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“…Entretanto, deve-se levar em conta que a maioria dos dados considerados nessa CDPA têm problemas quantoà determinação de idade, baixo número de sítios de amostragem, e são provenientes de regiões afetadas por tectonismo. O pólo SF quando comparadoà CDPA proposta por McElhinny et al (2003) para o Gondwana, também não concorda com essa curva, uma vez que os círculos de confiança de SF (SF-1 na Fig. 6) e dos pólos médios não se superpõem total ou parcialmente.…”

Section: Discussão E Conclusõesunclassified

“…Para o Paleozóico Superior existem poucos pólos paleomagnéticos da América do Sul que possam ser considerados pólos de referência (Gilder et al, 2003), istoé, atendamà maioria dos critérios de qualidade. Na compilação feita por McElhinny et al (2003) foram selecionados apenas 11 pólos da América do Sul e apenas 2 obtiveramíndice Q=6 (numa escala de 0 a 7). Um dos problemas mais freqüentes e graves na determinação da CDPAé a falta de controle geocronológico das formações sedimentares estudadas.…”

Section: Introductionunclassified

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Resultados paleomagnéticos preliminares do Grupo Santa Fé (Paleozóico da Bacia Sanfranciscana): implicações sobre a idade e paleolatitude da sedimentação glacial

Brandt¹,

Ernesto²

2006

Rev. Bras. Geof.

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ABSTRACT.A paleomagnetic study was performed on the Late Paleozoic Floresta Formation (Santa Fé Group) of the Sanfranciscana Basin, central Brazil. Thirty nine individual sites were sampled throughout a ten meters section near Santa Fé de Minas city. After detailed demagnetization procedures a unique characteristic remanence component was identified which was carried by both magnetite and hematite. Considering the indication of a previous investigation that hematite was formed during the initial stages of diagenesis it is concluded that magnetization is primary. This characteristic magnetization direction is of reversed polarity as expected for

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“…It consists of several orogenic belts whose age of deformation and accretion decreases from west to east (Murray et al 1987;Coney et al 1990;F16ttmann et al 1993;Glen et al 1998;Ireland et al 1998;Fergusson 2003;McElhinny et al 2003). The Early Palaeozoic Delamerian orogeny formed as Neoproterozoic and Cambrian sedimentary and volcanic arc terranes were accreted along the formerly passive margin of the western Australian Precambrian continental core.…”

Section: Australiamentioning

confidence: 99%