@article{fdi:010093402,
  title = {{C}obalt-rich diagenetic {M}n-oxide mineralization in the {N}eogene onshore {P}isco {B}asin, {P}eru},
  author = {{C}arcamo-{V}alencia, {I}. {C}. and {T}orró, {L}. and {R}amírez-{B}riones, {J}. {S}. and {A}yala, {L}. and {P}roenza, {J}. {A}. and {A}iglsperger, {T}. and {B}aby, {P}atrice},
  editor = {},
  language = {{ENG}},
  abstract = {{S}edimentary basin-hosted manganese oxides may represent an important yet underexplored source of critical metals. {H}ere we present a stratigraphic, textural, mineralogical, and compositional characterization of {M}n-oxide nodules, coatings, and veins in the {P}isco onshore forearc basin, {P}eru. {T}he {M}n-oxide mineralization is stratabound within marine sandstone, siltstone, and tuff from the {N}eogene {C}hilcatay and {P}isco formations. {X}-ray diffraction and electron microprobe analyses identify the {M}n oxides as cryptomelane (+/- hollandite) and todorokite, which cement detrital grains and fossilize biological remains. {B}ulk chemical analyses of nodules, coatings, and veins reveal significant cobalt enrichment (mean = 0.17 +/- 0.15 wt% {C}o; up to 0.63 wt% {C}o), corroborated by electron probe microanalysis of individual {M}n oxide phases (mean = 0.37 +/- 0.33 wt% {C}o; up to 2.1 wt% {C}o). {T}he stratigraphic control, biomorphic replacement, mineralogy, and chemical composition collectively indicate a diagenetic origin for the {M}n-oxide mineralization. {T}he formation pathway likely involved organic matter decay or brine-hydrocarbon interactions coupled with {M}n and {F}e reduction, resulting in metal-enriched porewaters that circulated along structures and permeable horizons. {S}ubsequent precipitation under oxygenated conditions occurred during late {P}liocene uplift and exposure of the {E}ast {P}isco {B}asin. {T}his study demonstrates that diagenetic {M}n oxides exposed in onshore basins represent a potential resource for manganese and critical elements such as cobalt.},
  keywords = {{PEROU} ; {PISCO} {BASSIN}},
  booktitle = {},
  journal = {{M}ineralium {D}eposita},
  volume = {[{E}arly access]},
  numero = {},
  pages = {[25 p.]},
  ISSN = {0026-4598},
  year = {2025},
  DOI = {10.1007/s00126-025-01364-w},
  URL = {https://www.documentation.ird.fr/hor/fdi:010093402},
}