South Precambrian platform

1. South Precambrian platform

BY OLEKSANDER PROKOPENKO

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3. South American Platform

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Stable continental crust of S. America not affected by Cenozoic
tectonics and orogenies
Basically everything east of the Andes and south of the Caribbean
o
Consists of Archean and older Proterozoic nuclei surrounded by
younger Proterozoic orogenic belts
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Exposed in 4 places:
Guyana Shield
Guaporé Shield
Sao Francisco Craton
Rio de la Plata Craton

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6. Guyana shield

Location : It underlies the three Guianas-Guyana, Surinam and
French Guiana- and parts of Venezuela, Columbia and Brazil.
Archean: three comparatively small Archean nuclei
The tectonically overthrust Imataca Complex in the north
The poorly defined Pakairama Craton in the centre – west
The Xingu Craton(northern segment) in the southeast
Early Proterozoic: rocks consisting of the metavolcanic Pastora
Supergroup and the granitic plutonic Supamo Complex. (2.2-1.8Ga)
Mind Proterozoic: rocks consists of continental clastic sedimentary
rocks. These Precambrian sediments include quartz sandstones,
quartzites, and conglomerates presumed (1.7-1.4Ga).

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9. Stratigraphy

10. Platform magmatism

In Amazon, Parnaiba, San Francisco, Paraná,
Chaco Basin , powerful strata of plateaubasalts and interplanetary intrusions of the
main composition and other breeds of the
formation of the Jurassic-Cretaceous
formation were discovered. This formation is
especially developed in the Paraná Basin,
where the Serra-Gerral series depth to 1.8 km

11. Tectonic

12. Minerals

First place in the world:
Iron ore
Cuprum
Beryllium
Lithium
Niobium
Second place in the world:
Titanium
Tin
Molybdenum
Antimony
Bauxite
Tantalum
Apatite
Others:
Manganese
Gold
Phosphorite
Diamonds

13. Resources

1.
Engler A. The Geology of South America // Encyclopedia of Life Support Systems. – Vol. IV.
Geology
2.
B. De Vivo, B. Grasemann, K. Stüwe (Eds.). - EOLOSS Publishers / Unesko, 2009.
3.
Guidoa D.M. The basement of the Deseado Massif at Bahıa Laura, Patagonia / D.M. Guidoa,
M.P. Escayola, I.B. Schalamuka // Journal of South American Earth Sciences. - 2004. Hildebrand,
R.S. et al. On the allochthonous nature of auriferous greenstones, Guayana shield, Venezuela
4.
// Gondwana Research. – 2014. - http://dx.doi.org/10.1016/j.gr.2013.09.011.
5.
https://www.cambridge.org/core/journals/netherlands-journal-ofgeosciences/article/paleoproterozoic-evolution-of-the-guiana-shield-in-suriname-a-revisedmodel/90A2153483F9A6A875E7201339ECF944/core-reader
6.
https://en.wikipedia.org/wiki/Guiana_Shield
7.
Alan M. Goodwin // Precambrian Geology: The Dynamic Evolution of the Continental Crust1991.
8.
Geologic Setting and Evolution of Latin America
http://www.utdallas.edu/~pujana/latin/PDFS/Lecture5%20Geologic%20setting%20and%20evolution%20of%20LA.pdf
9.
Parnaiba Basin https://www.researchgate.net/figure/Paleozoic-stratigraphic-column-of-theParnaiba-Basin-Modified-from-Vaz-et-al-2007_fig8_321706108