@article{fdi:010073223,
  title = {{S}upergene and exotic {C}u mineralization occur during periods of landscape stability in the {C}entinela {M}ining {D}istrict, {A}tacama {D}esert},
  author = {{R}iquelme, {R}. and {T}apia, {M}. and {C}ampos, {E}. and {M}podozis, {C}. and {C}arretier, {S}{\'e}bastien and {G}onzalez, {R}. and {M}unoz, {S}. and {F}ernandez-{M}ort, {A}. and {S}anchez, {C}. and {M}arquardt, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {C}entinela {M}ining {D}istrict ({CMD}), {A}tacama {D}esert (northern {C}hile), includes several mid-late {E}ocene porphyry {C}u deposits that contains supergene mineralization and provides access to a record of gravel deposits that host syn-sedimentary exotic {C}u mineralized bodies. {B}y studying these gravels, we reconstruct the unroofing history and constrain the geomorphological conditions that produced supergene and exotic {C}u mineralization. {W}e present an integrated study based on stratigraphic and sedimentological data, lithology clast counts, {A}r-40/{A}r-39 and {U}/{P}b ages from interbedded tuff layers and {U}/{P}b detrital zircon geochronology data. {T}o relate the gravel deposition episodes to the timing of the supergene mineralization, we provide in-situ and exotic supergene mineral ages ({A}r-40/{A}r-39 and {K}-{A}r). {S}ix gravel units were deposited between the mid-{E}ocene and the mid-{M}iocene. {T}he {E}speranza gravels were deposited concurrently with the emplacement of porphyry {C}u deposits at depth. {T}he subsequent {T}esoro {I}, {II} and {III} and {A}travesado gravels register the unroofing of these deposits, from the advanced argillic zone to the sericitic and prophylitic hypogene zones. {T}he {A}rrieros gravels register landscape pediplanation, that is, denudational removal and wear of the landscape to base level on a relatively stable tectonic regime, occurring roughly contemporaneous with supergene activity. {T}he supergene mineral ages of the {CMD} define a time span (ca. 25-12 {M}a) during which most of the supergene ages cluster in northern {C}hile. {T}his time span corresponds with a period of warm and humid climate conditions in the southern hemisphere. {W}e conclude that landscape pediplanation favours supergene mineralization and helps preserve the former supergene mineralized zones from significant erosion. {L}ow erosion rates during pediplanation may constitute a necessary condition for the efficiency of the supergene processes in such semi-arid climate.},
  keywords = {{CHILI} ; {ATACAMA} {DESERT}},
  booktitle = {},
  journal = {{B}asin {R}esearch},
  volume = {30},
  numero = {3},
  pages = {395--425},
  ISSN = {0950-091{X}},
  year = {2018},
  DOI = {10.1111/bre.12258},
  URL = {https://www.documentation.ird.fr/hor/fdi:010073223},
}