Abstract
The Novo Progresso Formation, Tapajós Gold Province, Amazonian Craton: zircon U-Pb and Lu-Hf constraints on the maximum depositional age, reconnaissance provenance study, and tectonic implications
Highlights
The sedimentary Novo Progresso Formation crops out in the southeastern portion of the Tapajós Gold Province, which evolved between about 2.05 and 1.76 Ga, central Amazonian Craton (Figs. 1 and 2). Santos (2003) and Ferreira et al (2004) attributed an Orosirian age for this formation and related it to the development of a cratonic association (1.87 to 1.80 Ga) of the Iriri-Xingu Domain, which includes the A-type granitoids of the Maloquinha Intrusive Suite and the still poorly understood Iriri Group, both with ages ranging from 1.89 to 1.88 Ga
In order to address these issues, we make use of field and petrographic data, whole-rock Nd isotopes, along with the first U-Pb and Lu-Hf analysis of detrital zircon applied to the Novo Progresso sedimentary formation
From the Hf and Nd isotopes results, the Orosirian rocks formed from variable contributions of Paleoproterozoic and Archean protoliths
Summary
The sedimentary Novo Progresso Formation crops out in the southeastern portion of the Tapajós Gold Province, which evolved between about 2.05 and 1.76 Ga, central Amazonian Craton (Figs. 1 and 2). Santos (2003) and Ferreira et al (2004) attributed an Orosirian age for this formation and related it to the development of a cratonic association (1.87 to 1.80 Ga) of the Iriri-Xingu Domain (east of the Tapajós Gold Province, Fig. 2), which includes the A-type granitoids of the Maloquinha Intrusive Suite and the still poorly understood Iriri Group (volcanic and pyroclastic rocks), both with ages ranging from 1.89 to 1.88 Ga. The sedimentary Novo Progresso Formation crops out in the southeastern portion of the Tapajós Gold Province, which evolved between about 2.05 and 1.76 Ga, central Amazonian Craton In order to address these issues, we make use of field and petrographic data, whole-rock Nd isotopes, along with the first U-Pb and Lu-Hf analysis of detrital zircon applied to the Novo Progresso sedimentary formation. We discuss the maximum depositional age, and present a reconnaissance investigation on the potential sources (provenance) for the zircon crystals contained in a lithic arenite of this formation
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
