Geological-structural background, deposit types and mineralization of São Francisco Craton in Bahia, Brazil

XU Ming; YAO Zhongyou; SHEN Mangting; GAO Tianshan; ZHOU Yan

2017 Vol. 36, No. 12

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XU Ming, YAO Zhongyou, SHEN Mangting, GAO Tianshan, ZHOU Yan. Geological-structural background, deposit types and mineralization of São Francisco Craton in Bahia, Brazil[J]. Geological Bulletin of China, 2017, 36(12): 2164-2178.

Citation:

XU Ming, YAO Zhongyou, SHEN Mangting, GAO Tianshan, ZHOU Yan. Geological-structural background, deposit types and mineralization of São Francisco Craton in Bahia, Brazil[J]. Geological Bulletin of China, 2017, 36(12): 2164-2178.

Geological-structural background, deposit types and mineralization of São Francisco Craton in Bahia, Brazil

Nanjing Center, China Geological Survey, Nanjing 210016, Jiangsu, China

Received Date: 20 March 2017

Revised Date: 19 September 2017

Publish Date: 25 December 2017

Abstract

Abstract

This paper aims at establishing a tectonic and temporal framework to characterize the metallogenic processes that made contribution to the formation of the mineral provinces in northern São Francisco Craton. Many Archean ore-forming processes which formed resources such as massive sulfide zinc, lead, zinc and copper, besides magnesite talc, iron-titanium-vanadium, iron, chromite and manganese, occurred before the assembly of the craton. Deposits of chromite, nickel, gold and emerald were formed during the Paleoproterozoic orogenic cycle, when the craton was amalgamated into the Atlantic paleocontinent. An extension event occurred during the breakup of Rodinia in the Neoproterozoic, which was associated with deposits of phosphorite and uranium. Kimberlite diamond and gold mineralization took place during the Brasiliano orogenic cycle, coeval with the amalgamation of West Gondwana. A long-lasting and rather uniform crustal stress happened in this area during the Cambrian period. Resetting of the isotopic and magnetic systems that affected the Neoproterozoic sediments of the Irecê Basin at about 520Ma was attributed to the regional fluid migration and mineralization in the aftermath of the Brasiliano orogenic cycle.
- São Francisco Craton /
- geological tectonic setting /
- type of deposit /
- metallogeny /
- Bahia /
- Brazil

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References

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