Reconstruction of the effusive and explosive deposits of the Aruri and Salustiano formations in the Tapajós Domain, Southern Amazonian Craton, from field relationship, petrography and geochemistry

Kunifoshita, André Massanobu Ueno; Santos, Felipe Holanda dos; Motta, João Gabriel

doi:10.1016/j.jsames.2020.103095

Cited by 2 publications

(2 citation statements)

References 55 publications

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“…In the TMP, the calc-alkaline volcanic sequences include some large ca. 1.89-1.87 Ga nested ash-flow caldera complexes [15,73]. The pre-caldera units are composed of flows and dikes of basaltic andesite and andesite, rhyodacite, dacite, rhyolite, and ignimbrites.…”

Section: Tapajós Mineral Province (Tmp)mentioning

confidence: 99%

“…Associated plutonic and subvolcanic rocks range from diorite to alkali-feldspar granites. Partially to intensively eroded volcanic calderas, ring and intracaldera volcanoes, resurgent dome, volcanic domes complexes, proximal to distal ignimbrite sequences, fissure-controlled volcanic and volcaniclastic rocks, hydrothermal pipes and dikes, volcanic breccias, agglomerates to ash tuffs, surge deposits, epiclastic volcaniclastic and fluvial, lacustrine, eolian and coastal deposits [15,26,46,55,56,60,68,69,73] are present in the TMP, similarly to modern volcanic arcs.…”

Section: The Tectonic Setting Of the Volcanic-plutonic Associations Of The Tmpmentioning

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: Tapajós Mineral Province (Tmp)mentioning

confidence: 99%

Section: The Tectonic Setting Of the Volcanic-plutonic Associations Of The Tmpmentioning

confidence: 99%

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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The Colíder Paleoproterozoic felsic volcanism: New insights into stratigraphy and petrogenesis in the southern Amazonian Craton

Kunifoshita,

dos Santos,

Mesquita

2024

Geoscience Frontiers

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Reconstruction of the effusive and explosive deposits of the Aruri and Salustiano formations in the Tapajós Domain, Southern Amazonian Craton, from field relationship, petrography and geochemistry

Cited by 2 publications

References 55 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

The Colíder Paleoproterozoic felsic volcanism: New insights into stratigraphy and petrogenesis in the southern Amazonian Craton

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