Burial-Deformation History of Folded Rocks Unraveled by Fracture Analysis, Stylolite Paleopiezometry and Vein Cement Geochemistry: A Case Study in the Cingoli Anticline (Umbria-Marche, Northern Apennines)

Aurélie Labeur (1) , Nicolas Beaudoin (1) , Olivier Lacombe (2) , Laurent Emmanuel (2) , Lorenzo Petracchini (3) , Mathieu Daëron (4, 5) , Sebastian Klimowicz (2) , Jean-Paul Callot (1)

1 LFCR - Laboratoire des Fluides Complexes et leurs Réservoirs
2 iSTeP - Institut des Sciences de la Terre de Paris
3 CNR - National Research Council of Italy | Consiglio Nazionale delle Ricerche
4 LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
5 PALEOCEAN - Paléocéanographie

settingsOrder Article Reprints Open AccessArticle Burial-Deformation History of Folded Rocks Unraveled by Fracture Analysis, Stylolite Paleopiezometry and Vein Cement Geochemistry: A Case Study in the Cingoli Anticline (Umbria-Marche, Northern Apennines) by Aurélie Labeur 1,Nicolas E. Beaudoin 1,Olivier Lacombe 2,*,Laurent Emmanuel 2,Lorenzo Petracchini 3,Mathieu Daëron 4,Sebastian Klimowicz 2 andJean-Paul Callot 1 1 Laboratoire des Fluides Complexes et Leurs Réservoirs, Universite de Pau et des Pays de l’Adour, E2S UPPA, CNRS, TOTAL, LFCR 64000 Pau, France 2 Institut des Sciences de la Terres de Paris–ISTeP, CNRS-INSU, Sorbonne Université, 75252 Paris, France 3 Consiglio Nazionale delle Ricerche, IGAG, 00015 Roma, Italy 4 Laboratoire des Sciences du Climat et de l’Environnement, UMR82212, LCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, 91190 Saclay, France * Author to whom correspondence should be addressed. Geosciences 2021, 11(3), 135; https://doi.org/10.3390/geosciences11030135 Received: 30 January 2021 / Revised: 25 February 2021 / Accepted: 1 March 2021 / Published: 13 March 2021 (This article belongs to the Special Issue The Apennines: Tectonics, Sedimentation, and Magmatism from the Palaeozoic to the Present) Download Browse Figures Versions Notes Abstract Unravelling the burial-deformation history of sedimentary rocks is prerequisite information to understand the regional tectonic, sedimentary, thermal, and fluid-flow evolution of foreland basins. We use a combination of microstructural analysis, stylolites paleopiezometry, and paleofluid geochemistry to reconstruct the burial-deformation history of the Meso-Cenozoic carbonate sequence of the Cingoli Anticline (Northern Apennines, central Italy). Four major sets of mesostructures were linked to the regional deformation sequence: (i) pre-folding foreland flexure/forebulge; (ii) fold-scale layer-parallel shortening under a N045 σ1; (iii) syn-folding curvature of which the variable trend between the north and the south of the anticline is consistent with the arcuate shape of the anticline; (iv) the late stage of fold tightening. The maximum depth experienced by the strata prior to contraction, up to 1850 m, was quantified by sedimentary stylolite paleopiezometry and projected on the reconstructed burial curve to assess the timing of the contraction. As isotope geochemistry points towards fluid precipitation at thermal equilibrium, the carbonate clumped isotope thermometry (Δ47) considered for each fracture set yields the absolute timing of the development and exhumation of the Cingoli Anticline: layer-parallel shortening occurred from ~6.3 to 5.8 Ma, followed by fold growth that lasted from ~5.8 to 3.9 Ma.

Mots clés: Apennines; fold-and-thrust belt; burial and tectonic history; fractures; stylolites; fluid flow; clumped isotope thermometry; paleopiezometry

Domaines: Sciences de la Terre

Aurélie Labeur, Nicolas Beaudoin, Olivier Lacombe, Laurent Emmanuel, Lorenzo Petracchini, et al.. Burial-Deformation History of Folded Rocks Unraveled by Fracture Analysis, Stylolite Paleopiezometry and Vein Cement Geochemistry: A Case Study in the Cingoli Anticline (Umbria-Marche, Northern Apennines). Geosciences, 2021, 11, ⟨10.3390/geosciences11030135⟩. ⟨hal-03252176⟩