6. Reverse telescoping in a distal skarn deposit (Campiglia Mari8ma, Italy) Vezzoni, S.1, Dini, A.

6.  Reverse  telescoping  in  a  distal  skarn  deposit  (Campiglia  Mari8ma,  Italy)

Vezzoni,  S.

_{,  Dini,  A.}

_{,  Rocchi,  S.}

in  prep.

1_{Dipar'mento  di  Scienze  della  Terra,  Università  di  Pisa,  Via  Santa  Maria  53,  56126  Pisa,  Italy} 2_{Is'tuto  di  Geoscienze  e  Georisorse,  CNR,  Via  Moruzzi  1,  56124  Pisa,  Italy}

Keywords:  magma$c-­‐hydrothermal  system,  skarn  deposit,  three-­‐dimensional  ore  shapes,   fluid  flow  path,  Fe-­‐Cu  ore,  Zn-­‐Pb(-­‐Ag)  ore,  reverse  telescoping

Detailed  field  and  underground  mappingled  to  the  three-­‐dimensional  reconstruc$on  of   geometries   of   the  skarn   and   magma$c   bodies   of   Campiglia   MariFma   ore   deposit.   The   textural  features  of   skarn   minerals  observed  at   Campiglia  MariFma  led  to  infer   the  fluid   flow   path   during   skarn   forma$on.   Integra$on   with   petrographic,   mineralogical   and   geochemical-­‐isotopic  data  allowed  to  reconstruct  the  rela$ve  $ming  and  the  mechanisms  of   skarn-­‐   and   ore-­‐forming   processes   showing   significant   differences   with   respect   to   the   evolu$on  of  a  skarn  deposit  acknowledged  as  “normal”.  Furthermore,  a  Fe-­‐Cu  ore  overprints   a  previously   formed   Zn-­‐Pb   ore,   an   unexpected   process   during   the  “normal   prograde   to   retrograde  skarn  evolu$on”.   The  bulk  of  this  evidence  generated  a  new  interpre$ve  model   based  on  a  reverse  telescoping  ore  evolu$on  process.