期刊
TECTONOPHYSICS
卷 671, 期 -, 页码 76-94出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.tecto.2016.01.020
关键词
Analog modeling; Patagonian orocline; Fuegian Andes; Rotational backstop; Basement promontory; Buttressing
资金
- ANPCYT-FONCYT [PICT 2012-2495, PICT 2011-0166, PICT 2012-2176, PICT 2010-1441]
- SECyT-UNS [Pgi 24/H117]
- CONICET [PIP 2011-0390]
Tectonic models for the evolution of the Patagonian orogenic curve were evaluated using analog experiments that considered either a rotational or a non-rotational orogenic backstop, combined with a basement promontory on the foreland cratonic margin. Five different kinematic configurations were used, aiming to evaluate the influence of the Rio Chico Arc as a rigid obstacle on the evolution of the Fuegian thrust fold belt Rotations, strains and displacement fields obtained from each analog experiment were compared with the structural geology known from the Fuegian thrust fold belt, in order to appraise the tectonic models that are more consistent with the natural structure. The push of a counterclockwise rotational backstop, combined with the buttressing effect of a foreland promontory, seem of major importance in controlling the final structure and map-view shape of the thrust wedge. (C) 2016 Elsevier B.V. All rights reserved.
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