Geochemical and isotopic constraints on the host rocks of the magmatic-hydrothermal Coringa gold-silver (Cu–Pb–Zn) deposit of the Tapajós mineral province, amazonian craton, Brazil

Guimarães, Stella Bijos; Klein, Evandro Luíz

doi:10.1016/j.jsames.2020.102726

Cited by 6 publications

(3 citation statements)

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“…Rhyolite domes comprise cogenetic black, porphyritic rhyolite (1967 ± 6.6 Ma to 1975 ± 5.3 Ma; SHRIMP IIe U-Pb in zircon; [26]; Figure 4F) and reddish flow-banded rhyolite with lithophysae (1.966 ± 22 Ma, SHRIMP IIe U-Pb in zircon; [26]). A magnetic pyroclastic facies (1990 ± 21 Ma to 1940 ± 19 Ma; LA-ICP-MS U-Pb; Sm-Nd T DM ages = 2.38 and 2.42 Ga; εNd (t) = 2.1 to 3.2) was recognized by [105].…”

Section: Intermediate-sulfidation Epithermal Au-ag-(cu-pb-zn) Depositsmentioning

confidence: 99%

“…In the Coringa area, porphyritic alkali feldspar granite and quartz monzonite porphyry (1980 ± 6.6 Ma to 1998 ± 6 Ma; [26,105]) and older granites of the volcanic sequence basement (2123 ± 86 Ma and 2023 ± 30 Ma with Sm-Nd T DM ages = 2.34 Ga; εNd (t) = −1.91; [26]) occur. Intrusive porphyry (1959 ± 5.5 Ma; 1963 ± 15 Ma), shallowemplaced granites with miarolitic texture (1959 ± 25 Ma), and granodiorite (1955 ± 19 Ma) intercept the volcanic sequence [26].…”

Section: Intermediate-sulfidation Epithermal Au-ag-(cu-pb-zn) Depositsmentioning

confidence: 99%

“…Intrusive porphyry (1959 ± 5.5 Ma; 1963 ± 15 Ma), shallowemplaced granites with miarolitic texture (1959 ± 25 Ma), and granodiorite (1955 ± 19 Ma) intercept the volcanic sequence [26]. Volcanic rocks and intrusive porphyries are oxidized, magnesian, calc-alkaline, and have a high-K to shoshonite affinity [26,105].…”

Section: Intermediate-sulfidation Epithermal Au-ag-(cu-pb-zn) Depositsmentioning

confidence: 99%

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Gold in Paleoproterozoic (2.1 to 1.77 Ga) Continental Magmatic Arcs at the Tapajós and Juruena Mineral Provinces (Amazonian Craton, Brazil): A New Frontier for the Exploration of Epithermal–Porphyry and Related Deposits

et al. 2021

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This review paper aims to integrate geological, tectonic and metallogenetic data, including new data, and propose a regional model for the gold (and base metal) mineralization in the south Amazonian Craton to support the mineral exploration concerning magmatic–hydrothermal deposits. The Proterozoic evolution of the Amazonian Craton comprises the accretion of terrains to the Archean Carajás Mineral Province. In the Tapajós and Juruena mineral provinces, located at the south part of the Amazonian craton, a long-lived ocean–continent subduction event produced ca. 2.0 to 1.77 Ga continental magmatic arcs. Extensive lava flows, volcaniclastic, sedimentary, and plutonic rocks were originated during at least four major orogenic magmatic events (ca. 2.1, 1.9, 1.88, and 1.80 Ga) and two post- to anorogenic events (ca. 1.87 and 1.77 Ga). Gold mineralization occurs in: (i) alluvial/colluvial occurrences, (ii) orogenic carbonate–sulfide-rich quartz veins in shear zones, (iii) stockworks, veins, and dissemination in granites, (iv) contact of basic dikes, (v) well-preserved high-, intermediate- and low-sulfidation epithermal mineralization, and (vi) porphyry-like and intrusion-related gold systems associated with late- to post-orogenic epizonal granites. The estimated historical gold production, mainly in secondary deposits, is over 27 Moz at the Tapajós and 6 Moz at the Juruena provinces. A total resource of over 5 Moz Au is currently defined in several small to large primary gold deposits. Andesite to rhyolite, volcaniclastic, and clastic sedimentary rocks (1.96–1.88 Ga) host epithermal (high-, intermediate-, and low-sulfidation) Au–(Ag–Pb–Zn) mineralization, whereas Au–Cu and Cu–M–Au mineralization is hosted in sub-volcanic tonalitic to granitic plutons. Advanced argillic alteration (alunite, pyrophyllite, enargite) associated with high-sulfidation mineralization occurs in ring volcanoes around nested volcanic calderas. This zone grades outward to propylitic or chlorite alteration, often covered by silica caps with vuggy silica. Lava flows and volcaniclastic rocks within faults or associated with volcanic edifices and rhyolitic domes host low- and intermediate-sulfidation mineralization. Low-sulfidation alteration zones typically have adularia and illite or sericite. Chalcopyrite, sphalerite, galena, pyrite, digenite, and manganiferous calcite are related to intermediate-sulfidation gold mineralization. Late- to post-orogenic evolved oxidized I-type granitoids host alkalic-type epithermal and porphyry-like gold mineralization. Porphyry-style hydrothermal alteration is analogous to those of modern systems, with inner sodic and potassic (potassic feldspar ± biotite or biotite) alterations grading to propylitic, muscovite-sericite, chlorite–sericite, and chlorite alterations. Potassic alteration zones are the locus of Cu–Mo mineralization, and gold-rich zones occur in muscovite/sericite–quartz–pyrite alteration. The Paleoproterozoic epithermal and porphyry-like mineralization in these large provinces defines a new frontier for the exploration of world-class gold deposits in the worldwide Proterozoic arc-related magmatic terrains.

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Section: Intermediate-sulfidation Epithermal Au-ag-(cu-pb-zn) Depositsmentioning

confidence: 99%

Section: Intermediate-sulfidation Epithermal Au-ag-(cu-pb-zn) Depositsmentioning

confidence: 99%

Section: Intermediate-sulfidation Epithermal Au-ag-(cu-pb-zn) Depositsmentioning

confidence: 99%

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Gold in Paleoproterozoic (2.1 to 1.77 Ga) Continental Magmatic Arcs at the Tapajós and Juruena Mineral Provinces (Amazonian Craton, Brazil): A New Frontier for the Exploration of Epithermal–Porphyry and Related Deposits

et al. 2021

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Multistage mineralizing episodes of the Proterozoic world-class Volta Grande gold deposit, Amazonian Craton, northern Brazil: Implications for the Bacajá Domain metallogenesis

Souza,

Fernandes,

Lopes

et al. 2024

Journal of South American Earth Sciences

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Metallogenesis of the orosirian epithermal coringa gold-silver (Cu-Pb-Zn) deposit, southeastern Tapajós mineral Province, Amazonian craton, Brazil

Guimarães

Klein

Harris

et al. 2021

Ore Geology Reviews

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Geochemical and isotopic constraints on the host rocks of the magmatic-hydrothermal Coringa gold-silver (Cu–Pb–Zn) deposit of the Tapajós mineral province, amazonian craton, Brazil

Cited by 6 publications

References 50 publications

Gold in Paleoproterozoic (2.1 to 1.77 Ga) Continental Magmatic Arcs at the Tapajós and Juruena Mineral Provinces (Amazonian Craton, Brazil): A New Frontier for the Exploration of Epithermal–Porphyry and Related Deposits

Gold in Paleoproterozoic (2.1 to 1.77 Ga) Continental Magmatic Arcs at the Tapajós and Juruena Mineral Provinces (Amazonian Craton, Brazil): A New Frontier for the Exploration of Epithermal–Porphyry and Related Deposits

Multistage mineralizing episodes of the Proterozoic world-class Volta Grande gold deposit, Amazonian Craton, northern Brazil: Implications for the Bacajá Domain metallogenesis

Metallogenesis of the orosirian epithermal coringa gold-silver (Cu-Pb-Zn) deposit, southeastern Tapajós mineral Province, Amazonian craton, Brazil

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