Application of new multi-dimensional discrimination diagrams and geochemical modeling to Archaean igneous rocks of Brazilian cratons

• Grant number: 12/07243-3
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: September 01, 2012
• End date: July 31, 2015
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: Elson Paiva de Oliveira
• Grantee: Sanjeet Kumar Verma
• Host Institution: Instituto de Geociências (IG). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated research grant: 12/15824-6 - Evolution of archaean terranes of the São Francisco Craton and the Borborema Province, Brazil: global environmental and geodynamic implications, AP.TEM

Abstract

The Archaean is the most important period of crustal growth in the Earth's history. It is characterized by greater heat production and related higher geothermal gradients that favoured the genesis of rocks such as adakites and voluminous tonalite-trondhjemite-granodiorite (TTG) plutonism. However, the tectonic setting of formation of these igneous suites is still a matter of much debate and several attempts have been made to decipher the tectonic setting on the basis of geochemistry. The most popular models are partial melting of mafic oceanic crust under pressures high enough to stabilize garnet, with or without interaction of the melt with the mantle wedge. The tectonic setting can be tested by using multi-dimensional diagrams. These diagrams are called multi-dimensional because each of the two x- and y-axes contains several log-ratio variables, being 10 for major-element based diagrams. This is major advantage of multi-dimensional discriminant-function-based diagrams over the conventional bivariate or ternary diagrams. In this proposal, multi-dimensional discrimination diagrams (Verma et al., 2012) will be used to decipher the dominant tectonic setting of Archaean igneous rocks from Brazilian cratons. Therefore, the novelty of my approach lies in the multi-dimensional solution as a complement to the ongoing research in Brazilian (Amazonian and São Francisco) cratons.

Scientific publications

(15)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

VERMA, SANJEET K.; OLIVEIRA, ELSON P.. Tectonic setting of basic igneous and metaigneous rocks of Borborema Province, Brazil using multi-dimensional geochemical discrimination diagrams. Journal of South American Earth Sciences, v. 58, n. SI, p. 309-317, MAR 2015. (12/15824-6, 12/07243-3)

VERMA, SURENDRA P.; VERMA, SANJEET K.; OLIVEIRA, ELSON P.. Application of 55 multi-dimensional tectonomagmatic discrimination diagrams to Precambrian belts. INTERNATIONAL GEOLOGY REVIEW, v. 57, n. 11-12, SI, p. 1365-1388, SEP 10 2015. (12/15824-6, 12/07243-3)

VERMA, SANJEET K.; OLIVEIRA, ELSON P.; VERMA, SURENDRA P.. Plate tectonic settings for Precambrian basic rocks from Brazil by multidimensional tectonomagmatic discrimination diagrams and their limitations. INTERNATIONAL GEOLOGY REVIEW, v. 57, n. 11-12, SI, p. 1566-1581, SEP 10 2015. (12/15824-6, 12/07243-3)

VERMA, SANJEET K.; OLIVEIRA, ELSON P.; SILVA, PAOLA M.; MORENO, JUAN A.; AMARAL, WAGNER S.. Geochemistry of komatiites and basalts from the Rio das Velhas and Pitangui greenstone belts, Sao Francisco Craton, Brazil: Implications for the origin, evolution, and tectonic setting. LITHOS, v. 284, p. 560-577, JUL 2017. (12/15824-6, 14/04920-0, 12/07243-3)

MORENO, J. A.; BALDIM, M. R.; SEMPRICH, J.; OLIVEIRA, E. P.; VERMA, S. K.; TEIXEIRA, W.. Geochronological and geochemical evidences for extension-related Neoarchean granitoids in the southern Sao Francisco Craton, Brazil. Precambrian Research, v. 294, p. 322-343, JUN 2017. (14/03334-0, 12/15824-6, 14/04920-0, 12/07243-3)

VERMA, SURENDRA P.; PANDARINATH, KAILASA; VERMA, SANJEET K.; AGRAWAL, SALIL. Fifteen new discriminant-function-based multi-dimensional robust diagrams for acid rocks and their application to Precambrian rocks. LITHOS, v. 168, p. 113-123, MAY 2013. (12/07243-3)

VERMA, SURENDRA P.; CRUZ-HUICOCHEA, RENE; DIAZ-GONZALEZ, LORENA; VERMA, SANJEET K.. A new computer program TecDIA for multidimensional tectonic discrimination of intermediate and acid magmas and its application to the Bohemian Massif, Czech Republic. JOURNAL OF GEOSCIENCES, v. 60, n. 4, p. 203-218, 2015. (12/15824-6, 12/07243-3)

VERMA, SANJEET K.; OLIVEIRA, ELSON P.. Tectonic setting of basic igneous and metaigneous rocks of Borborema Province, Brazil using multi-dimensional geochemical discrimination diagrams. Journal of South American Earth Sciences, v. 58, p. 9-pg., 2015-03-01. (12/07243-3, 12/15824-6)

VERMA, SURENDRA P.; VERMA, SANJEET K.; OLIVEIRA, ELSON P.. Application of 55 multi-dimensional tectonomagmatic discrimination diagrams to Precambrian belts. INTERNATIONAL GEOLOGY REVIEW, v. 57, n. 11-12, p. 24-pg., 2015-09-10. (12/07243-3, 12/15824-6)

SINGH, PRADIP K.; VERMA, SANJEET K.; SINGH, VINOD K.; MORENO, JUAN A.; OLIVEIRA, ELSON P.; LI, XIAN-HUA; MALVIYA, VIVEK P.; PRAKASH, DIVYA. Geochronology and petrogenesis of the TTG gneisses and granitoids from the Central Bundelkhand granite-greenstone terrane, Bundelkhand Craton, India: Implications for Archean crustal evolution and cratonization. Precambrian Research, v. 359, JUL 1 2021. (12/15824-6, 12/07243-3)

SINGH, PRADIP K.; VERMA, SANJEET K.; SINGH, VINOD K.; MORENO, JUAN A.; OLIVEIRA, ELSON P.; MEHTA, PANKAJ. Geochemistry and petrogenesis of sanukitoids and high-K anatectic granites from the Bundelkhand Craton, India: Implications for late-Archean crustal evolution. JOURNAL OF ASIAN EARTH SCIENCES, v. 174, p. 263-282, MAY 1 2019. (12/07243-3, 12/15824-6)

VERMA, SANJEET K.; VERMA, SURENDRA P.; OLIVEIRA, ELSON P.; SINGH, VINOD K.; MORENO, JUAN A.. LA-SF-ICP-MS zircon U-Pb geochronology of granitic rocks from the central Bundelkhand greenstone complex, Bundelkhand craton, India. JOURNAL OF ASIAN EARTH SCIENCES, v. 118, p. 125-137, MAR 15 2016. (12/15824-6, 14/04920-0, 12/07243-3)

VERMA, SURENDRA P.; VERMA, SANJEET K.. First 15 probability-based multidimensional tectonic discrimination diagrams for intermediate magmas and their robustness against postemplacement compositional changes and petrogenetic processes. TURKISH JOURNAL OF EARTH SCIENCES, v. 22, n. 6, p. 931-995, 2013. (12/07243-3)

VERMA, SANJEET K.; OLIVEIRA, ELSON P.. Application of multi-dimensional discrimination diagrams and probability calculations to Paleoproterozoic acid rocks from Brazilian cratons and provinces to infer tectonic settings. Journal of South American Earth Sciences, v. 45, p. 117-146, AUG 2013. (12/07243-3)

VERMA, SANJEET K.; OLIVEIRA, ELSON P.; VERMA, SURENDRA P.. Plate tectonic settings for Precambrian basic rocks from Brazil by multidimensional tectonomagmatic discrimination diagrams and their limitations. INTERNATIONAL GEOLOGY REVIEW, v. 57, n. 11-12, p. 16-pg., 2015-09-10. (12/07243-3, 12/15824-6)