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Challenges and Prospects of Intra-terrane Shear Zones and Supercontinents

  • Submission deadline: 2 April 2021
  • Lead Editor: Sayandeep Banerjee, Institute of Science, Banaras Hindu University, India
  • Guest Editors:
    • Philippe Goncalves, Université de Bourgogne Franche-Comté, France
    • Koushik Sen, Wadia Institute of Himalayan Geology, India

Call for papers

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Description

Amalgamations of cratonic blocks during the supercontinental cycles are frequently recognized based on the occurrence of terrane boundaries or intercontinental margins, characterized by large-scale shear zones. Accounts of terrane boundary shear zones related to the reconstruction of supercontinents are also quite common in literature. However, reports on the identification of intra-terrane shear zones (ITSZ) are scarce and their implication in studying supercontinents remains elusive. Thus, the identification of ITSZ in cratonic regions might serve as the missing pieces of unresolved puzzles in reconstructing supercontinents.

While the identification of terrane boundary shear zones can be made at all scales (satellite to outcrop), the determination of ITSZ is often challenging due to the discrete/incomplete nature of shear zones. Furthermore, the obliteration of early deformational history by later structures, varying lithology, and changing P-T conditions makes it even more difficult to delineate an ITSZ and thus, requires detailed investigation at all scales. Additionally, ITSZ typically represent sites of crustal thickening due to the emplacement of syn- or late-tectonic sheet granites and associated meta-sedimentary sequences, which may provide valuable insight into processes such as arc-accretion related to the assembly of supercontinents.

The focus of the special issue is broadly two-fold: (i) delineating the structural anatomy of ITSZ across different cratonic regions of the world; (ii) establishing the status of ITSZ in connection to the assembly of supercontinents of different time periods. Therefore, the aim of this Issue is to collate both research and review articles primarily related but not restricted to the structural architecture and tectonic significance of ITSZ. The articles should highlight the importance of a particular method or a range of methods in the effective recognition of ITSZ in continental shield regions and its relation to past supercontinent cycles. Articles appraising the uniqueness of intra-continental shear zones from inter-continental ones are especially encouraged. Articles evaluating the nucleation process of ITSZ and its driving mechanism will be highly appreciated. Articles dealing with the localization of economic mineral deposits along ITSZ or related events of metallogeny are also encouraged.

Potential topics include but are not limited to the following:

  • Characterization of intra-continental vis-à-vis inter-continental shear zones
  • Structural–geological mapping
  • Structural analysis of plate- to micro-scale structures
  • Anisotropy of magnetic susceptibility
  • Modelling (Physical, Numerical, etc.)
  • Igneous Petrology
  • Metamorphic Petrology
  • Paleomagnetism
  • Geochronology
  • Economic Geology
  • Geophysical methods

Papers are published upon acceptance.

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