CANADIAN AND WORLD MINERAL DEPOSIT DATABASES
Geological Survey of Canada


Deposit number Country Location Names Commodities
762 Peru (Pasco) 10.28.45 S -- 075.42.46 W Eliana Cu
 
Database name: World Fe-oxide+/-Cu-Au-U (IOCG) deposits
Compilers: Sunil S. Gandhi
Release date: 2015-03-04
   
Deposit name(s): Eliana
Political location(s): Peru; Province or state: Pasco; Nearest community: Lima (230 km SE)
Deposit clan (type): Kiruna-type
Deposit (sub) types: stratabound; manto up to 12 m thick, comprised of lenses that define a gently folded horizon; occurs near contact with Eliana gabbro-diorite sill and Casma volcanics; small discordant veins occur near manto
Deposit status: past producer; Size category: 0.4 Mt
Geologic province: Andean Orogen
Geologic subprovince: Coastal Cordillera
Geologic district: Cañete-Huarmey Marginal Basin
Commodities: Cu
Mineralization styles: stacked lenses; marginal disseminations; veins; breccia
Geological ages: Middle Cretaceous (mineralization)
Tectonic setting: continental orogenic belt-basin; convergent; Formal name: Early stage of Coastal Batholith (mineralization)
Coincident features: intrusive contact (continental margin extension basin intruded by Coastal Batholith of the Andean orogen); Coincident feature name: Casma volcanics - Patap gabbro-diorite
Host rocks: (1) volcanic; intermediate-felsic volcanic rocks (central zone of silicic tuff and calcareous beds); Magma series/sedimentary package/metamorphic group: tholeiitic; Depositional setting: continental; Metamorphic grade: greenschist
Host rock stratigraphy:Casma Volcanics

(2) intrusive; gabbro-diorite suite (intrudes gently folded Casma volcanics); Magma series/sedimentary package/metamorphic group: tholeiitic (low K); Depositional setting: continental; Metamorphic grade: none
Host rock stratigraphy:Eliana gabbro-diorite of Patap Super-unit
Related igneous rocks: (1) intrusive; quartz monzonite-monzogabbro suite (early phase of Coastal Batholith); Initials: Linga pluton; Magma series: calc-alkaline; Depositional setting: continental
Country rocks: (1) intermediate volcanics; (intercalated with marine beds); Country rock name: Casma volcanics; Metamorphic grade: greenschist
(2) granite suite; (multi-stage emplacement); Country rock name: Coastal Batholith; Metamorphic grade: none
Metallogenic signatures: Cu
Au
Ag
Fe
Co
Ni
Alteration signatures: albitization: albite; What was altered: host volcanics and intrusion
propylitic alteration: phyllosilicates; What was altered: host volcanics and intrusion
chloritization: chlorite; What was altered: host volcanics and intrusion
carbonatization: calcite; What was altered: host volcanics and intrusion
silicification: quartz, silica; What was altered: host volcanics and intrusion
Mineralogy: (alteration): chlorite, scapolite (marialite), amphibole
(gangue): calcite, quartz
(mineralization): chalcopyrite, pyrite, magnetite, pyrrhotite, actinolite, apatite
Radiometric ages: Object dated: Mineralization; Age - Ma: 115; +5; -5; Dating method: K-Ar; Concentrate: actinolite; Source rock: ore zone; Formal name: hydrothermal silicate; Event dated: mineralization; Interpretive comment: ganue mineral of the deposit indicates a mid-Creataceous, Aptian-Albian, age of ore formation; Reference: Vidal, C. E.; Injoque, J.; Sidder, G., 1990: Amphibolitic Cu-Fe Skarn Deposits in the Central Coast of Peru; Economic Geology, Volume 85, p. 1447 - 1461

Object dated: Gangue; Age - Ma: 113; +3; -3; Dating method: K-Ar; Concentrate: hastingsite; Source rock: ore zone; Formal name: hydrothermal silicate; Event dated: mineralization; Interpretive comment: ganue mineral of the deposit indicates a mid-Creataceous, Aptian-Albian, age of ore formation; Reference: Vidal, C. E.; Injoque, J.; Sidder, G., 1990: Amphibolitic Cu-Fe Skarn Deposits in the Central Coast of Peru; Economic Geology, Volume 85, p. 1447 - 1461
Qualified comments: (Applies to: discovery and development) Main San Martín manto mined intermittently and during 1967-'72 produced 0.4 Mt averaging 2.7 per cent Cu (Vidal et al., 1990); satellite Majodar magnetite-actinolite orebody 2 km to the SE in gabbro.
References:
Injoque, J., 2002
Fe Oxide-Cu-Au Deposits in Peru: An Integrated View
Section The Americas, in Hydrothermal Iron Oxide Copper-Gold and Related Deposits: A Global Perspective, Volume 2, Edited by Porter, T. M., Australian Mineral Foundation, Adelaide, Australia, PGC Publishing, Adelaide, 377 p, p. 97 - 114

Sillitoe, 2003
Iron Oxide-Copper-Gold Deposits: An Andean View
Mineralium Deposita, Volume 38, p. 787 - 812

Vidal, C. E.; Injoque, J.; Sidder, G., 1990
Amphibolitic Cu-Fe Skarn Deposits in the Central Coast of Peru
Economic Geology, Volume 85, p. 1447 - 1461


Generated 2015-03-04 14:16:30 with GQuery -- 3.7 ADO (3.19..3.22 -- 2008-12-16)
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