English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/74911
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Illite-smectite patterns in sheared Pleistocene mudstones of the Southern Apennines and their implications regarding the process of illitization: A multiscale analysis

AuthorsCasciello, Emilio ; Cosgrove, J.W.; Cesarano, M.; Romero, E. ; Queralt Mitjans, Ignacio ; Vergés, Jaume
Issue Date2011
PublisherPergamon Press
CitationJournal of Structural Geology 33: 1699- 1711 (2011)
AbstractThe transformation of water-rich smectite clay minerals into relatively anhydrous illite is a common reaction in sedimentary basins. It is commonly thought to be driven by temperature increase with increasing burial depth. This mineral transformation is also observed in the gouge of large faults, and because it releases bound water from smectite, it is thought to be a key control in hydrologic and mechanical processes at subduction complexes. In this work, the distribution of smectite and illite within a large fault zone of the Southern Apennines of Italy is analysed at scales varying from outcrop to sub millimetre. X-ray diffraction analyses indicate a direct link between the darkening in colour of the sheared mudstone and the illitization of smectite. The heterogeneous distribution of illite and smectite within this shear zone was studied by integrating outcrop-scale observations with a peeling technique that allows microscope and SEM observations to be made over areas in excess of 60 cm2. The observed patterns of smectite illitization suggest that temperature is not the primary cause of the mineral transformation inside the fault. The distribution of illite along planes of the P foliation and in the infill of shears indicates that shear stress facilitates the mineral transformation. © 2011 Elsevier Ltd.
URIhttp://hdl.handle.net/10261/74911
DOI10.1016/j.jsg.2011.08.002
Identifiersdoi: 10.1016/j.jsg.2011.08.002
issn: 0191-8141
Appears in Collections:(ICTJA) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.