Structural diagenesis of shallow platform carbonates: Role of early embrittlement on fracture setting and distribution, case study of Monte Alpi (Southern Apennines, Italy) - Archive ouverte HAL Access content directly
Journal Articles Journal of Structural Geology Year : 2020

Structural diagenesis of shallow platform carbonates: Role of early embrittlement on fracture setting and distribution, case study of Monte Alpi (Southern Apennines, Italy)

(1, 2) , (1) , (3) , (4) , (3) , (2) , (2)
1
2
3
4

Abstract

Bed-perpendicular, opening-mode diffuse fractures are common features in carbonate rocks because they become brittle during the first stages of diagenesis. Early-fractures could be independent of tectonics and form a background structural network from sub-millimeter to 10's of centimetres scale. This study focuses on the outcrop-to-micro scales structural, stratigraphic, and petrographic characterization of Lower Cretaceous, shallow-water, tight limestones of the Inner Apulian Platform exposed along the axial sector of the southern Apennines fold-and-thrust belt, Italy. This work aims at understanding the formation of early diagenetic fractures during the first stages of sediment lithification, and on their impact on subsequent deformation mechanisms associated to polyphase tectonics. The results of field structural surveys, of petrographic and cathodoluminescence analyses of representative samples unravel the main structural-diagenetic processes in shallow-water carbonates. We document that early brittle fractures were intrinsically related to the host rock pore type and cementation processes, and summarize the overall time-dependant evolution of the structural assemblages in a conceptual model. This model includes all abutting and crosscutting relationships among the various structural elements from field to thin-section observation, and form the now days fracture network.
Fichier principal
Vignette du fichier
LaBruna2019.pdf (3.81 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03164540 , version 1 (25-11-2022)

Licence

Attribution - NonCommercial - CC BY 4.0

Identifiers

Cite

Vincenzo La Bruna, Juliette Lamarche, Fabrizio Agosta, Andrea Rustichelli, Alessandro Giuffrida, et al.. Structural diagenesis of shallow platform carbonates: Role of early embrittlement on fracture setting and distribution, case study of Monte Alpi (Southern Apennines, Italy). Journal of Structural Geology, 2020, 131, pp.103940. ⟨10.1016/j.jsg.2019.103940⟩. ⟨hal-03164540⟩
20 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More