Back to Search
Start Over
Shearing of syn-sedimentary carbonate breccia along strike-slip faults, Altamura Fm., Southern Italy
- Source :
- Italian Journal of Geosciences (Testo stamp.) 135 (2016): 41–54. doi:10.3301/IJG.2014.37, info:cnr-pdr/source/autori:Laurita, Salvatore 1,2; Agosta, Fabrizio1,2; Cavalcante, Francesco 3; Rustichelli, Andrea 2,4; Giorgioni, Maurizio 5/titolo:Shearing of syn-sedimentary carbonate breccia along strike-slip faults, Altamura Fm., Southern Italy/doi:10.3301%2FIJG.2014.37/rivista:Italian Journal of Geosciences (Testo stamp.)/anno:2016/pagina_da:41/pagina_a:54/intervallo_pagine:41–54/volume:135
- Publication Year :
- 2016
- Publisher :
- Societa Geologica Italiana, 2016.
-
Abstract
- Fault breccia present along strike-slip faults was studied by mean of an integrated field and laboratory investigation. In particular, samples of sheared pre-existing, syn-sedimentary gravitative breccia were detailed studied in order to decipher the deformation mechanisms associated to strike-slip faulting. The sheared gravitative breccia is made up of matrix-supported, monomictic, unsorted intraformational fragments embedded within a reddish hematite rich, clayish matrix. Microsparry calcite cement is also present around the limestone fragments. In contrast, tectonic breccia consists of comminuted limestone fragments embedded in a calcite-rich matrix also including small amounts of reddish matrix. Particle shape analysis of representative images of the study hand specimens shows a variability of the box-counting dimension (D-0-value) between the two different types of breccias, which can be explained in terms of peculiar strain localization within a threefold aggregate that characterizes the gravitative breccia, which is made up of calcite fragments, clayish matrix and very minute oxides.
- Subjects :
- Shearing (physics)
Calcite
Murge Plateau
Geochemistry
Geology
gravitative breccia
syn-sedimentary deformation
Strike-slip tectonics
chemistry.chemical_compound
Fault breccia
fault breccia
chemistry
Deformation mechanism
Breccia
General Earth and Planetary Sciences
Carbonate
Altamura Fm
Sedimentary rock
Subjects
Details
- ISSN :
- 20381719
- Volume :
- 135
- Database :
- OpenAIRE
- Journal :
- Italian Journal of Geosciences
- Accession number :
- edsair.doi.dedup.....26ff7e2db07616bd4b6512cf3c063049