@article{fdi:41481,
  title = {{M}ultistage gold deposition in the {A}rchaean {M}aria {L}azara gold deposit ({G}oias, {B}razil)},
  author = {{M}ichel, {D}. and {G}iuliani, {G}aston and {P}ulz, {G}.{M}. and {J}ost, {H}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {M}aria {L}azara gold deposit in the {A}rchaean {G}uarinos greenstone belt, central {B}razil, consists of quartz-carbonate veins formed in a ductile shear zone. {S}tudy of the sulphides and gold-bearing quartz-carbonate veins and veinlets of the potassic hydrothermal alteration zone reveals two stages of ore paragenesis. {T}he first stage corresponds to {S}-rich arsenopyrite deposition and the second one to the precipitation of {A}s-rich arsenopyrite and {B}i-{T}e-{A}u-{S} phases. {M}odes of occurrence, textures and {A}g contents of native gold define two types of gold. {T}he first type is native gold with {A}g contents greater than 5 wt % postdating the {S}-rich arsenopyrites. {T}he second type has {A}g contents less than 3 wt % and is contemporaneous with {B}i-{T}e-{S} phases. ({R}{\'e}sum{\'e} d'auteur)},
  keywords = {{GEOCHIMIE} ; {OR} ; {GITOLOGIE} ; {MINERALOGIE} ; {PARAGENESE} ; {BRESIL} ; {GOIAS} ; {MARIA} {LAZARA} {REGION}},
  booktitle = {},
  journal = {{M}ineralium {D}eposita},
  numero = {29},
  pages = {94--97},
  ISSN = {0026-4598},
  year = {1994},
  URL = {https://www.documentation.ird.fr/hor/fdi:41481},
}