http://www.cnr.it/ontology/cnr/individuo/prodotto/ID171123
Corrensite and chlorite-rich Chl-S mixed layers in sandstones from the 'Macigno' Formation (northwestern Tuscany, Italy) (Articolo in rivista)
- Type
- Label
- Corrensite and chlorite-rich Chl-S mixed layers in sandstones from the 'Macigno' Formation (northwestern Tuscany, Italy) (Articolo in rivista) (literal)
- Anno
- 2010-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1180/claymin.2010.045.1.87 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Leoni L.; Lezzerini M.; Battaglia S.; Cavalcante F. (literal)
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- http://claymin.geoscienceworld.org/ (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
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- In: Clay Minerals, vol. 45 (1) pp. 87 - 106. The Mineralogical Society of Great Britain and Ireland, 2010. (literal)
- Note
- ISI Web of Science (WOS) (literal)
- Scopu (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Leoni Leonardo, Dipartimento Scienze della Terra Università di Pisa
Lezzerini Marco, Dipartimento Scienze della Terra Università di Pisa
Battaglia Stefano, Istituto di Geoscienze e Georisorse
Cavalcante Francesco, Istituto di Metodologie per l'Analisi Ambientale (literal)
- Titolo
- Corrensite and chlorite-rich Chl-S mixed layers in sandstones from the 'Macigno' Formation (northwestern Tuscany, Italy) (literal)
- Abstract
- Corrensite and chlorite-rich chlorite-smectitc (Chl-S) mixed-layers occurring in the Macigno Formation of northwestern Tuscany were investigated by XRPD/SEM techniques. The samples from the Macigno outcrops were affected by metamorphism corresponding to the high-diagenesis/low-anchizone transition boundary. The basal spacing of corrensite measured from 00/reflections on EG-Mg2+-saturated samples ranges from 30.97 to 31.18 angstrom with a coefficient of variation (CV) of 0.46-0.77%, consistent with the rational pattern of a 1:1 Chl-S periodic stacking sequence. X-ray patterns of heated K+-saturated specimens reveal the presence of two types of corrensite, probably with different interlayer charges on their respective smectite-like layers. The chlorite-rich Chl-S mixed layers coexisting with corrensite consist of R2 chlorite (0.70-0.75)/S and chlorite (0.90)/S with long-range ordering R >= 1. SEM observations show that corrensite and chlorite-rich Chl-S mixed-layers are closely mixed on a sub-micron scale. Some grains of corrensite and chlorite-rich Chl-S mixed-layers include zones (2-10 mu m) of chlorite composition, as shown by microprobe analyses. (literal)
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