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BIBTEX RIS

CARACTERIZAÇÃO GEOMÉTRICA E CINEMÁTICA DA ZONA DE CISALHAMENTO MAJOR GERCINO E SUA IMPORTÂNCIA NA COMPARTIMENTAÇÃO DOS TERRENOS PRÉ-CAMBRIANOS DE SANTA CATARINA

1993; Sociedade Brasileira de Geologia; Volume: 23; Issue: 3 Linguagem: Inglês

10.25249/0375-7536.1993233234241

ISSN

2177-4382

Autores

Cláudia Regina Passarelli, Miguel Ângelo Stipp Basei, Mário da Costa Campos Neto,

Tópico(s)

Geological Modeling and Analysis

Resumo

This paper presents the available geometric and kinematic data for the Major Gercino Shear Zone (MGSZ), Santa Catarina State, Southern Brazil. Complex displacement envolving pure shear and simple shear with local dextral and sinistrai movement between the southeastern granite domain and the northwestern mica schists of the Brusque Group, which are separed by the MGSZ is proposed. The quartz c-axis fabrics show the complex evolution of this shear zone where both pure and simple shear mechanisms were very important during the main deformational phase. Based on Fry analysis it was obtained a S45W-N45E as the main axis of extension direction (X) and a second roughly N-S direction which are in reasonable agreement with the other stretched indicators (Lm). Petrografic studies on mylonite samples allowed the characterization of a low temperature shear zone in which biotite and muscovite are the principal metamorphic minerals developed during shear.

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