Deposit number | Country | Location | Names | Commodities |
769 | Argentina (Salta) | 25.05.50 S -- 067.40.00 W | Arizaro; Arizaro Prospect | Cu; Au; Fe |
Database name: | World Fe-oxide+/-Cu-Au-U (IOCG) deposits | ||||||||||
Compilers: | Sunil S. Gandhi | ||||||||||
Release date: | 2015-03-04 | ||||||||||
Deposit name(s): | Arizaro; Arizaro Prospect | ||||||||||
Political location(s): | Argentina; Province or state: Salta | ||||||||||
Deposit clan (type): | Olympic Dam-type | ||||||||||
Deposit (sub) types: | Reference: Dow, R. J.; Hitzman, M. H., 2002: Geology of the Arizaro and Lindero Prospects, Salta Province, Northwest Argentina: Mid-Miocene Hydrothermal Fe-Ox Copper-Gold Mineralisation; 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. 153 - 162 | ||||||||||
Deposit status: | prospect; Size category: small | ||||||||||
Geologic province: | Miocene-Pleistocene Andean Arc | ||||||||||
Geologic subprovince: | Puna Plateau | ||||||||||
Geologic district: | Arizaro Basin | ||||||||||
Commodities: | Cu; Au; Fe | ||||||||||
Mineralization styles: | breccia-fillings; veins and associated disseminations | ||||||||||
Geological ages: | Miocene (host rocks) Miocene (mineralization) | ||||||||||
Tectonic setting: | continental arc-inter-arc; convergent; Formal name: Miocene-Pleistocene Andean Arc (host rocks) | ||||||||||
Coincident features: | intrusive core (breccia-filling and stockwork of magnetite veins with K-feldspar, grade outward to biotite-bearing zone, and then to spotty biotite zone); Coincident feature name: Arizaro Volcanic Complex | ||||||||||
Regional tectonic structure: | plateau uplift due to subduction-related crustal thickening (rapid uplift and continental volcanism continued to Pleistocene) Tectonic structure name: Miocene Andean Arc | ||||||||||
Host rocks: | (1) intrusive; quartz monzonite-monzogabbro suite (one of three zones of intrusive rocks in Arizaro Volcanic Complex); Magma series/sedimentary package/metamorphic group: calc-alkaline; Depositional setting: arc-back arc basin; Metamorphic grade: none
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Country rocks: | (1) red sandstone; (Cretaceous-late Oligocene; arkosic); Country rock name: Red Bed Sequence; Metamorphic grade: none
(2) intermediate volcanics; (with related volcaniclastic and intrusive rocks); Country rock name: Arizaro Volcanic Complex; Metamorphic grade: none
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Metallogenic signatures: | Fe-Cu-Au | ||||||||||
Alteration signatures: | potassic alteration: marked by flooding of K-feldspar with magnetite ; What was altered: host intrusion biotitization: stockwork of biotite-K-feldspar-magnetite veins; What was altered: host intrusion biotitization: biotite-chalcopyrite spots; rim with magnetite; What was altered: host intrusion propylitic alteration: calcite, biotite and chlorite; What was altered: phenocrysts of host intrusion | ||||||||||
Mineralogy: | (alteration): epidote, chlorite, sericite, quartz, clay minerals, copper oxides (oxidation zone) (gangue): k-feldspar, biotite, calcite, diopside, quartz (mineralization): magnetite, chalcopyrite, bornite, gold, palladian gold, actinolite | ||||||||||
Radiometric ages: | Object dated: Host Rocks(1); Age - Ma: 16.35; +0.35; -0.35; Dating method: Ar-Ar; Concentrate: whole rock; Source rock: porphyritic intermediate intrusion; Formal name: intrusive event; Event dated: host rock; Interpretive comment: age of relatively unaltered intrusive rocks indicates the time of emplacement ; Reference: Dow, R. J.; Hitzman, M. H., 2002: Geology of the Arizaro and Lindero Prospects, Salta Province, Northwest Argentina: Mid-Miocene Hydrothermal Fe-Ox Copper-Gold Mineralisation; 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. 153 - 162 Object dated: Mineralization Style(1); Age - Ma: 15.46; +0.11; -0.11; Dating method: Ar-Ar; Concentrate: biotite; Source rock: biotite-K-feldspar-magnetite zone; Formal name: mineralization event; Event dated: mineralization; Interpretive comment: sample from thoroughly biotitically altered rock; the age is close to the age of the host rock; Reference: Dow, R. J.; Hitzman, M. H., 2002: Geology of the Arizaro and Lindero Prospects, Salta Province, Northwest Argentina: Mid-Miocene Hydrothermal Fe-Ox Copper-Gold Mineralisation; 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. 153 - 162 Object dated: Mineralization Style(1); Age - Ma: 13.98; +0.38; -0.38; Dating method: Ar-Ar; Concentrate: K-feldspar; Source rock: massive K-feldspar; Formal name: mineralization event; Event dated: inner potassic alteration zone; Interpretive comment: sample from K-feldspar-magnetite-actinoliteħbiotite zone; age significantly younger than biotite age; Reference: Dow, R. J.; Hitzman, M. H., 2002: Geology of the Arizaro and Lindero Prospects, Salta Province, Northwest Argentina: Mid-Miocene Hydrothermal Fe-Ox Copper-Gold Mineralisation; 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. 153 - 162 | ||||||||||
Qualified comments: | (Applies to: discovery and development) Discovered in 1999; a 636 m long N-S trench averaged 0.13 % Cu and 0.22 g/t Au, and a 516 m long trench at 025° starting near S end of the former averaged 0.13 % Cu and 0.24 g/t Au; minor Ag, Zn, La. | ||||||||||
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