Arid
DOI10.1016/j.jsames.2014.06.001
Denudation history and landscape evolution of the northern East-Brazilian continental margin from apatite fission-track thermochronology
Jelinek, A. R.1; Chemale, E., Jr.2; van der Beek, P. A.3; Guadagnin, F.4; Cupertino, J. A.5; Viana, A.5
通讯作者Jelinek, A. R.
来源期刊JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
ISSN0895-9811
出版年2014
卷号54页码:158-181
英文摘要

We reconstruct the history of denudation and landscape evolution of the northern East- Brazilian continental margin using apatite fission-track thermochronology and thermal history modeling. This part of the Brazilian Atlantic margin is morphologically characterized by inland and coastal plateaus surrounding a wide low-lying inland region, the Sertaneja Depression. The apatite fission track ages and mean track lengths vary from 39 +/- 4 to 350 +/- 57 Ma and from 10.0 +/- 0.3 to 14.2 +/- 0.2 mu m, respectively, implying a protracted history of spatially variable denudation since the Permian at relatively low rates (<50 m My(-1)). The Sertaneja Depression and inland plateaus record Permian-Early Jurassic (300-180 Ma) denudation that precedes rifting of the margin by > 60 Myrs. In contrast, the coastal regions record up to 2.5 km of Late Jurassic-Early Cretaceous (150-120 Ma) denudation, coeval with rifting of the margin. The samples from elevated coastal regions, the Borborema Plateau and the Mantiqueira Range, record cooling from temperatures above 120 degrees C since the Late Cretaceous extending to the Cenozoic. We interpret this denudation as related to post-rift uplift of these parts of the margin, possibly resulting from compressional stresses transmitted from the Andes and/or magmatism at that time. Several samples from these areas also record accelerated Neogene (<30 Ma) cooling, which may record landscape response to a change from a tropical to a more erosive semi-arid climate during this time. The inferred denudation history is consistent with the offshore sedimentary record, but not with evolutionary scenarios inferred from the recognition of "planation surfaces" on the margin. The denudation history of the northeastern Brazilian margin implies a control of pre-, syn- and post-rift tectonic and climatic events on landscape evolution. (C) 2014 Elsevier Ltd. All rights reserved.


英文关键词Passive continental margin Denudation NE-Brazil Apatite fission-track thermochronology
类型Article
语种英语
国家Brazil ; France
收录类别SCI-E
WOS记录号WOS:000340863900011
WOS关键词TUCANO-JATOBA RIFT ; DRAKENSBERG ESCARPMENT ; BORBOREMA PROVINCE ; SEISMIC-REFLECTION ; ANNEALING KINETICS ; FLEXURAL ISOSTASY ; SOUTHEAST BRAZIL ; TECTONIC CONTROL ; PASSIVE MARGINS ; MANTLE PLUMES
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
来源机构French National Research Institute for Sustainable Development
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/183669
作者单位1.Univ Fed Rio Grande do Sul, Inst Geociencias, BR-91501970 Porto Alegre, RS, Brazil;
2.Univ Brasilia, Inst Geociencias, Brasilia, DF, Brazil;
3.Univ Grenoble 1, Inst Sci Terre, Grenoble, France;
4.Univ Fed Pampa, Dept Geol, Cacapava Do Sul, Brazil;
5.Petrobras SA, Rio De Janeiro, Brazil
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GB/T 7714
Jelinek, A. R.,Chemale, E., Jr.,van der Beek, P. A.,et al. Denudation history and landscape evolution of the northern East-Brazilian continental margin from apatite fission-track thermochronology[J]. French National Research Institute for Sustainable Development,2014,54:158-181.
APA Jelinek, A. R.,Chemale, E., Jr.,van der Beek, P. A.,Guadagnin, F.,Cupertino, J. A.,&Viana, A..(2014).Denudation history and landscape evolution of the northern East-Brazilian continental margin from apatite fission-track thermochronology.JOURNAL OF SOUTH AMERICAN EARTH SCIENCES,54,158-181.
MLA Jelinek, A. R.,et al."Denudation history and landscape evolution of the northern East-Brazilian continental margin from apatite fission-track thermochronology".JOURNAL OF SOUTH AMERICAN EARTH SCIENCES 54(2014):158-181.
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