Tremolite-calcite veins in the footwall of the Simplon Fault, Antigorio valley, Lepontine Alps (Italy). (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• Tremolite-calcite veins in the footwall of the Simplon Fault, Antigorio valley, Lepontine Alps (Italy). (Articolo in rivista) (literal)

Anno

• 2011-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1007/s00015-011-0074-0 (literal)

Alternative label

• Meggiolaro, V. ; Sapigni, M. [ 1 ] ; Fioretti, A. M. [ 2 ] (2011)
  Tremolite-calcite veins in the footwall of the Simplon Fault, Antigorio valley, Lepontine Alps (Italy).
  in Swiss journal of geosciences (Print)
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Meggiolaro, V. ; Sapigni, M. [ 1 ] ; Fioretti, A. M. [ 2 ] (literal)

Pagina inizio

• 355 (literal)

Pagina fine

• 365 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni

• ID_PUMA : cnr.igg/2011-A0-084 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 104 (literal)

Rivista

• Swiss journal of geosciences (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

• 3 (literal)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• [ 1 ] ENEL SpA, Dept Engn, I-30172 Venice, Italy [ 2 ] CNR, Ist Geosci & Georisorse, Unita Operat Padova, I-35131 Padua, Italy (literal)

Titolo

• Tremolite-calcite veins in the footwall of the Simplon Fault, Antigorio valley, Lepontine Alps (Italy). (literal)

Abstract

• The lowermost units of the nappe pile of the Lepontine Alps crop out in the Antigorio valley in the footwall of the Simplon Fault. The whole orthogneiss section of the Antigorio Unit is exposed on both sides of the valley, sandwiched between the Mesozoic metasedimentary sequences of the Baceno unit below and the TSggiolo unit above. The petrography and mineral composition of tremolite-calcite veins occurring in dolomite marble in both metasedimentary sequences were investigated. Tremolite-calcite (with lesser talc and minor phlogopite) veins have rhythmic banded texture. Banding is due to cyclic differences in modal abundances and fabric of tremolite and calcite. These veins are very similar to those occurring in dolomite rafts within the Bergell granite and it is inferred that they formed by the same \"fracture-reaction-seal\" mechanism. Veins formed by reaction of a silica-rich aqueous fluid with the host dolomite marble along fractures. According to thermo-barometric calculations, based on electron microprobe analyses, reaction occurred at temperatures between 450 and 490A degrees C and minimum pressure of 2-3 kbar. Such temperature conditions occurred in this footwall region of the Simplon Fault Zone around 15 Ma, during exhumation and cooling of the nappe pile and a transition to brittle behaviour. Aqueous, silica-rich fluids concentrated along fractures, forming tremolite-calcite veins in the dolomite marbles and quartz veins in the orthogneiss. (literal)

Prodotto di

• Metodologie integrate per la conoscenza di processi e materiali geologici e del loro impatto sull'uomo e l'ambiente (TA.P04.014.002) (Modulo)
• Istituto di geoscienze e georisorse (IGG) (Istituto)

Autore CNR

• ANNA MARIA FIORETTI (Unità di personale interno)

Insieme di parole chiave

• Parole chiave di "Tremolite-calcite veins in the footwall of the Simplon Fault, Antigorio valley, Lepontine Alps (Italy)." (Insieme di parole chiave)

Incoming links:

Autore CNR di

• ANNA MARIA FIORETTI (Unità di personale interno)

Prodotto

• Istituto di geoscienze e georisorse (IGG) (Istituto)
• Metodologie integrate per la conoscenza di processi e materiali geologici e del loro impatto sull'uomo e l'ambiente (TA.P04.014.002) (Modulo)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Swiss journal of geosciences (Rivista)

Insieme di parole chiave di

• Parole chiave di "Tremolite-calcite veins in the footwall of the Simplon Fault, Antigorio valley, Lepontine Alps (Italy)." (Insieme di parole chiave)