Late Archean Cu-Au-Mo mineralization at Gameleira and Serra Verde, Carajàs Mineral Province, Brazil

Constraints from Re-Os molybdenite ages

Robert Marschik, Ryan Dilip Mathur, Joaquin Ruiz, Richard A. Leveille, Antonio José de Almeida

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

New Re-Os molybdenite ages provide constraints on the timing of Late Archean Cu-Au-Mo mineralization in the northern Carajás Mineral Province. Molybdenite from the Gameleira iron oxide Cu-Au-Mo deposit yielded an age of 2,614±14 Ma. This age overlaps within its analytical error with Re-Os ages of molybdenite from the Serra Verde Cu-Au-Mo vein deposit (2,609±13 Ma) and from the nearby small Garimpo Fernando gold mining operation (2,592±13 and 2,602±13 Ma), which is probably related to the latter. The geochronological data imply that the hydrothermal Cu-Au-Mo mineralization in these three deposits was epigenetic and coincides with a regional tectonic regime changing from dextral transtension and clastic sedimentation at 2.7-2.6 Ga to sinistral transpression and inversion at 2.6 Ga. Previously reported stable isotope and microthermometric data are compatible with a magmatic affiliation of the Cu-Au-Mo ores at Gameleira and Serra Verde. A genetic relationship of mineralization may therefore exist with 2.56-2.76 Ga Archean alkaline granitoids or with 2.6-2.7 calc-alkaline to tholeiitic volcanic-arc type magmatism.

Original languageEnglish (US)
Pages (from-to)983-991
Number of pages9
JournalMineralium Deposita
Volume39
Issue number8
DOIs
StatePublished - Mar 1 2005

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molybdenite
Brazil
Minerals
Archean
Deposits
deposits
minerals
mineralization
mineral
Gold mines
Tectonics
veins
Sedimentation
iron oxides
Isotopes
transtension
Ores
transpression
volcanology
tectonics

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

Cite this

Marschik, Robert ; Mathur, Ryan Dilip ; Ruiz, Joaquin ; Leveille, Richard A. ; de Almeida, Antonio José. / Late Archean Cu-Au-Mo mineralization at Gameleira and Serra Verde, Carajàs Mineral Province, Brazil : Constraints from Re-Os molybdenite ages. In: Mineralium Deposita. 2005 ; Vol. 39, No. 8. pp. 983-991.
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Late Archean Cu-Au-Mo mineralization at Gameleira and Serra Verde, Carajàs Mineral Province, Brazil : Constraints from Re-Os molybdenite ages. / Marschik, Robert; Mathur, Ryan Dilip; Ruiz, Joaquin; Leveille, Richard A.; de Almeida, Antonio José.

In: Mineralium Deposita, Vol. 39, No. 8, 01.03.2005, p. 983-991.

Research output: Contribution to journalArticle

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