Skip to content

Research at St Andrews

Two-stage terrane assembly in Western Gondwana: insights from structural geology and geophysical data of central Borborema Province, NE Brazil

Research output: Contribution to journalArticle

Author(s)

Lauro Cézar M. de Lira Santos, Elton L. Dantas, Roberta M. Vidotti, Peter A. Cawood, Edilton J. dos Santos, Reinhadt A. Fuck, Haroldo M. Lima

School/Research organisations

Abstract

Combined geophysical and structural data from the Transversal Subprovince of the Borborema Province (NE Brazil) highlight the internal structure of, and interrelationships between, the constituent terranes. Radiometric and magnetic maps show distinctive signatures for the Archean-Paleoproterozoic Alto Moxotó and Meso-to Neoproterozoic Alto Pajeú and Pernambuco-Alagoas terranes. Mapped radiometric and first and second order magnetic lineaments, associated with Euler deconvolution, enable correlation between geophysical data and major structures. In addition to early related deformation of the Alto Moxotó Terrane, combined analysis of late transposition foliations, lineations and kinematic criteria reveal a complex structural evolution marked by two distinct assembly stages. The first phase is characterized by thrust tectonics with top-to-the-south vergence, resulting in the juxtaposition of the allochtonous Alto Pajeú Terrane with the structurally underlying Alto Moxotó Terrane. The terrane boundary is delineated by the Serra de Jabitacá Shear Zone, which is associated with low dipping collisional granitic sheets and ca. 1.0 Ga mafic-ultramafic rocks interpreted as obtudcted ophiolite remnants. Later strike-slip movements strongly folded and obliterated thrust-related markers, and the continental scale E-W Pernambuco Lineament is interpreted as the result of lateral assembly between the composite Alto Pajeú-Alto Moxotó terranes and the Pernambuco-Alagoas Terrane during the metamorphic peak of the Brasiliano orogeny. Evolution of the Borborema Province reflects accretionary processes during the assembly of Western Gondwana.
Close

Details

Original languageEnglish
Pages (from-to)167-184
JournalJournal of Structural Geology
Volume103
Early online date19 Sep 2017
DOIs
Publication statusPublished - Oct 2017

    Research areas

  • Polycyclic deformation, Western Gondwana, Borborema Province, Accretion tectonics

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Implications of 770 Ma Rhyolitic Tuffs, eastern South China Craton in constraining the tectonic setting of the Nanhua Basin

    Qi, L., Xu, Y., Cawood, P. A., Wang, W. & Du, Y., Jan 2019, In : Lithos. 324-325, p. 842-858

    Research output: Contribution to journalArticle

  2. Evolution of the Mozambique Belt in Malawi constrained by granitoid U-Pb, Sm-Nd and Lu-Hf isotopic data

    Manda, B. W. C., Cawood, P. A., Spencer, C. J., Prave, T., Robinson, R. & Roberts, N. M. W., 29 Nov 2018, In : Gondwana Research. In press

    Research output: Contribution to journalArticle

Related by journal

  1. Structural signatures of igneous sheet intrusion propagation

    Magee, C., Muirhead, J., Schofield, N., Walker, R. J., Galland, O., Holford, S., Spacapan, J., Jackson, C. A-L. & McCarthy, W., 21 Jul 2018, In : Journal of Structural Geology. In press

    Research output: Contribution to journalArticle

  2. Scale invariant sheath folds in salt, sediments and shear zones

    Alsop, G. I., Holdsworth, R. E. & McCaffrey, K. J. W., Oct 2007, In : Journal of Structural Geology. 29, 10, p. 1585-1604 20 p.

    Research output: Contribution to journalArticle

  3. The structural evolution of sheath folds: A case study from Cap de Creus

    Alsop, G. I. & Carreras, J., Dec 2007, In : Journal of Structural Geology. 29, 12, p. 1915-1930 16 p.

    Research output: Contribution to journalArticle

  4. Sheath folds as discriminators of bulk strain type

    Alsop, G. I. & Holdsworth, R. E., Sep 2006, In : Journal of Structural Geology. 28, 9, p. 1588-1606 19 p.

    Research output: Contribution to journalArticle

Related by journal

  1. Journal of Structural Geology (Journal)

    G Ian Alsop (Member of editorial board)
    2007 → …

    Activity: Publication peer-review and editorial work typesEditor of research journal

ID: 251116704