Age constraints of the glaciation in the Parana Basin: evidence from new U-Pb dates

被引：89

作者：

Cagliari, Joice ^{[1
]}

Philipp, Ruy Paulo ^{[2
]}

Buso, Victoria Valdez ^{[1
]}

Netto, Renata Guimaraes ^{[1
]}

Hillebrand, Peter Klaus ^{[3
]}

Lopes, Ricardo da Cunha ^{[3
]}

Stipp Basei, Miguel Angelo ^{[4
]}

Faccini, Ubiratan Ferrucio ^{[1
]}

机构：

[1] Univ Vale Rio dos Sinos, Programa Posgrad, Ave Unisinos 950, BR-93022000 Sao Leopoldo, RS, Brazil

[2] Univ Fed Rio Grande do Sul, Inst Geociencias, Ave Bento Goncalves 9500, BR-91509900 Porto Alegre, RS, Brazil

[3] Univ Vale Rio dos Sinos, Grad Geol, Ave Unisinos 950, BR-93022000 Sao Leopoldo, RS, Brazil

[4] Univ Sao Paulo, Inst Geociencias, Rua Lago,562,Cidade Univ, BR-05508080 Sao Paulo, SP, Brazil

来源：

JOURNAL OF THE GEOLOGICAL SOCIETY | 2016年 / 173卷 / 06期

关键词：

PALEOZOIC ICE-AGE; EASTERN AUSTRALIA; RECORD; NAMIBIA; TUFFS;

D O I：

10.1144/jgs2015-161

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The absence of absolute dating in glacial deposits of the Parana Basin prevents better understanding of the complete history of the Late Palaeozoic Ice Age in Western Gondwana and the climatic change that took place in the late Carboniferous. In this study, new U-Pb radiometric ages date the topmost glacial deposits of the Itarar Group at 307.7 +/- 3.1 Ma (Kasimovian-Moscovian) and the base of post-glacial deposits of the Rio Bonito Formation at 298.8 +/- 1.9 Ma (Ghzelian-Asselian). Correlation of glacial and post-glacial deposits of the Parana Basin with other southwestern Gondwana basins shows that the end of the Late Palaeozoic Ice Age is asynchronous.

引用

页码：871 / 874

页数：4

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