Precious metals and cenozoic volcanism in the Chilean Andes

Cabello, José

doi:10.1016/0375-6742(86)90004-x

Cited by 4 publications

(4 citation statements)

References 22 publications

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“…In general, the close correlation of Cenozoic gold deposits with volcanic centers and sub volcanic intrusives seems to be clear (Cabello, 1986(Cabello, , 1992Davidson and Mpodozis, 1991). In addition, the relationship of the Cenozoic deposits with volcanic landform is quite evident in several cases (Choquelimpie, Volcán, Marte and Lobo).…”

Section: Discussionmentioning

confidence: 98%

“…Most of the Cenozoic gold deposits seem to be related to eroded volcanic centres and/or sub volcanic intrusives (Davidson and Mpodozis, 1991) and all of them are part of discrete magmatic arcs, parallel to the current coastal line (Cabello, 1986(Cabello, , 1992.…”

Section: Cenozoic Gold Depositsmentioning

confidence: 99%

“…1). Gold-silver mineralization occurs in veins and hydrothermal breccias hosted in an eroded dacitic-andesitic stratovolcano intruded by similar composition domes (Cabello, 1986;Gröpper et al, 1991). The second case is the Pimentón mine located in the Andes cordillera of central Chile.…”

Section: Cenozoic Gold Depositsmentioning

confidence: 99%

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Gold Deposits in Chile

Cabello¹

2021

andgeo

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A review of gold and gold bearing base metals deposits in Chile, indicate the existence of at least six different type of ore deposits, most largely formed during the Cenozoic with predominance in the Miocene. Mesozoic deposits are common but less relevant regarding their size and gold content. These hydrothermal ore deposits are genetically associated with subduction related Andean arc magmatism. Due to its relationship with episodic magmatism migrating eastward, there is a tendency for the deposits to be in distinct, north-south trending, belts with a progressive west to east decrease in mineralization age. After analysing 82 cases in total, main gold concentration can be assigned to high-sulfidation epithermal and porphyry type deposits. Low-sulfidation epithermal, IOCG and mesothermal type appears as less relevant. Gold bearing copper deposits constitute an important part of Chile’s total gold production. Both IOCG type but especially porphyry copper deposits are and will remain as a substantial source to supplement the future output of the gold in the country. The 82 deposits with their tonnage and grade studied, represent a total gold content of 11,662 t equivalent to 375 Moz, excluding past production for those exploited. A number of probable gold bearing base metals high tonnage deposits (IOCG and porphyry copper) do not include their gold content in public format, hence the number delivered could be estimated conservative. Methodical geochronological, ore types and zonation studies are required to better appreciate this metallogenic setting widening current understanding and future exploration results.

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Section: Discussionmentioning

confidence: 98%

Section: Cenozoic Gold Depositsmentioning

confidence: 99%

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Gold Deposits in Chile

Cabello¹

2021

andgeo

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“…In the first, it may be the major constituent of the acid sulphate class of epithermal deposit where it can host precious metal(-Cu) vein and stockwork systems extending over vertical intervals of several hundred metres. Suitable environments occur in the cores of volcanic edifices where the alteration has formed by magmatic hydrothermal processes involving disproportionation of magmatic SO2 to H2S and H2SO4; such hypogene environments may also be spatially and genetically related to underlying porphyry Cu systems (Henley & Ellis 1983;Bonham 1986;Cabello 1986;Heald et al 1987;Rye etal. 1989).…”

Section: Introductionmentioning

confidence: 98%

The Mt Ninderry acid sulphate alteration zone and its relation to epithermal mineralization in the North Arm Volcanics, southeast Queensland.

Ashley

Andrew

1992

Australian Journal of Earth Sciences

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Synvolcanic and Younger Plutonic Rocks from the Blake River Group: Implications for Regional Metallogenesis

et al. 2008

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The Blake River Group of the Abitibi greenstone belt is host to the well-known volcanogenic massive sulfide (VMS) deposits of the Noranda camp, Québec, Canada. In the Noranda camp massive sulfide deposits are spatially associated with the coeval Flavrian-Powell intrusive complex, which is interpreted to have driven hydrothermal circulation that formed the deposits in the camp. In the western Blake River Group in Ontario there are also abundant intrusive rocks, yet relatively insignificant accumulations of VMS deposits. These intrusive rocks are younger (2686.9 ± 1.2 and 2688.5 ± 2.3 Ma) and are associated with porphyry-style Cu-Mo-Au mineralization with Re-Os molybdenite ages of 2682.4 ± 5 Ma. The intrusions are also smaller in areal extent and do not have a temporally extended, polyphase history like the Flavrian-Powell intrusive complex. The intrusions of the western Blake River Group can also be distinguished by lithogeochemical attributes and a distinct petrological history compared to the Flavrian-Powell intrusive complex.

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Precious metals and cenozoic volcanism in the Chilean Andes

Cited by 4 publications

References 22 publications

Gold Deposits in Chile

Gold Deposits in Chile

The Mt Ninderry acid sulphate alteration zone and its relation to epithermal mineralization in the North Arm Volcanics, southeast Queensland.

Synvolcanic and Younger Plutonic Rocks from the Blake River Group: Implications for Regional Metallogenesis

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