Preprints
https://doi.org/10.5194/se-2020-218
https://doi.org/10.5194/se-2020-218

  29 Jan 2021

29 Jan 2021

Review status: this preprint is currently under review for the journal SE.

Structural studies in active caldera geothermal systems. Reply to Comment on Estimating the depth and evolution of intrusions at resurgent calderas: Los Humeros (Mexico) by Norini and Groppelli (2020)

Stefano Urbani1, Guido Giordano1,2, Federico Lucci1, Federico Rossetti1, Valerio Acocella1, and Gerardo Carrasco-Núñez3 Stefano Urbani et al.
  • 1Dipartimento di Scienze, Università degli Studi Roma Tre, Largo S.L. Murialdo 1, I-00146 Roma, Italy
  • 2CNR - IGAG Montelibretti, Roma
  • 3Centro de Geociencias, Universidad Nacional Autónoma de México, Campus UNAM Juriquilla, 76100, Queretaro, Mexico

Abstract. Structural studies in active caldera systems are widely used in geothermal exploration to reconstruct volcanological conceptual models. Active calderas are difficult settings to perform such studies mostly because of the highly dynamic environment, dominated by fast accumulation of primary and secondary volcanic deposits, the variable and transient rheology of the shallow volcanic pile, and the continuous feedback between faulting and geothermal fluid circulation/alteration that tend to obliterate the tectonic deformation structures. In addition, deformation structures can be also caused by near- and far-field stress regimes, which include magmatic intrusions at various depths (volumes and rates), the evolving topography and regional tectonics. A lack of consideration of all these factors may severely underpin the reliability of structural studies. By rebutting and providing a detailed discussion of all the points raised by the comment of Norini and Groppelli (2020) to the Urbani et al. (2020) paper, we take the opportunity to specify the scientific rationale of our structural fieldwork and strengthen its relevance for geothermal exploration/exploitation in active caldera geothermal systems in general, and, particularly, for the Holocene history of deformation and geothermal circulation in the Los Humeros caldera. At the same time, we identify several major flaws in the approach and results presented in Norini and Groppelli (2020).

Stefano Urbani et al.

Status: open (until 18 Mar 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on se-2020-218', Gianluca Norini, 09 Feb 2021 reply
    • CC2: 'Reply on CC1', Guido Giordano, 16 Feb 2021 reply
  • RC1: 'Comment on se-2020-218', Anonymous Referee #1, 14 Feb 2021 reply
  • RC2: 'Comment on se-2020-218', John Browning, 05 Mar 2021 reply

Stefano Urbani et al.

Stefano Urbani et al.

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Short summary
Structural studies in active calderas have a key role in the exploration of geothermal systems. We reply in detail to the points raised by the comment of Norini and Groppelli (2020), strengthening the relevance of our structural fieldwork for geothermal exploration/exploitation in active caldera geothermal systems including the Los Humeros caldera. We also reject the hard judgments raised by N&G2020 showing many methodological/logical flaws in the scientific rationale followed in the comment.