Elliptical mud volcano caldera as stress indicator in an active compressional setting (Nirano, Pede-Apennine margin, northern Italy)

Abstract

Research Article| February 01, 2008 Elliptical mud volcano caldera as stress indicator in an active compressional setting (Nirano, Pede-Apennine margin, northern Italy) Marco Bonini Marco Bonini 1Consiglio Nazionale delle Ricerche (CNR), Istituto di Geoscienze e Georisorse, Via G. La Pira 4, 50121 Florence, Italy Search for other works by this author on: GSW Google Scholar Geology (2008) 36 (2): 131–134. https://doi.org/10.1130/G24158A.1 Article history received: 08 Jun 2007 rev-recd: 28 Sep 2007 accepted: 02 Oct 2007 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Marco Bonini; Elliptical mud volcano caldera as stress indicator in an active compressional setting (Nirano, Pede-Apennine margin, northern Italy). Geology 2008;; 36 (2): 131–134. doi: https://doi.org/10.1130/G24158A.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The relations between mud volcanism and active tectonic strain were investigated at the Nirano mud volcano field (NMVF), near the active Pede-Apennine thrust front of the Northern Apennines thrust-and-fold belt (Italy). Active fluid release occurs through numerous vents within an elliptical depression developed over the crest of a thrust-related anticline. This depression is interpreted as a caldera collapse–like structure that may have developed in response to the deflation of a shallow mud chamber triggered by eruption and sediment fluid evacuation events. Like many volcanic calderas, the NMVF caldera is elongated nearly parallel to the direction of least horizontal compressive stress Sh, and is thus deduced to reflect the regional tectonic stress axes. It is concluded that mud volcano calderas exhibit mechanical similarities to the igneous analogs, and that the methods used in this first test could be applied to other calderas imaged by seismic data and in the field. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.