From migmatite to magma - crustal melting and generation of granite in the Camboriú Complex, south Brazil

Amós Martini, Maria de Fátima Bitencourt, Roberto F. Weinberg, Giuseppe Betino De Toni, V. S.Nardi Lauro

Research output: Contribution to journalArticleResearchpeer-review

1 Citation (Scopus)

Abstract

Partial melting of continental crust and granite genesis were investigated in the Camboriú region, south Brazil. Structural geology and geochemistry were used in order to characterize the link between the high Ba-Sr Itapema Granite (IG)and the syntectonic melting of orthogneisses and amphibolites of the Camboriú Complex (CC). The IG is a sheet-like intrusive body of biotite monzogranite to granodiorite with large amount of migmatitic amphibolite and gneiss xenoliths, and a well-developed magmatic foliation concordant with the main gneissic banding. Discordant, m-thick granitic dykes which crosscut the migmatitic sequence and transport magma and xenoliths to feed the IG main body mark the transition from the migmatitic to the magmatic system within the complex. Whole-rock geochemical data reveal important contamination and assimilation processes of xenoliths during IG magmatic flow which give rise to different facies and geochemical signatures. The generation of the IG is an example of a continuous exposure from source to sink formed through a continuous and efficient deformation-driven melting/extraction/transport system generated during coeval folding and anatexis of the CC metamorphic sequence.

Original languageEnglish
Pages (from-to)270-286
Number of pages17
JournalLithos
Volume340-341
DOIs
Publication statusPublished - 1 Sep 2019

Keywords

  • Extraction dykes
  • Generation of crustal magmas
  • Migmatitic system

Cite this

Martini, Amós ; Bitencourt, Maria de Fátima ; Weinberg, Roberto F. ; De Toni, Giuseppe Betino ; Lauro, V. S.Nardi. / From migmatite to magma - crustal melting and generation of granite in the Camboriú Complex, south Brazil. In: Lithos. 2019 ; Vol. 340-341. pp. 270-286.
@article{7d17769dfe4b48149a32b7ab7f0f49b4,
title = "From migmatite to magma - crustal melting and generation of granite in the Cambori{\'u} Complex, south Brazil",
abstract = "Partial melting of continental crust and granite genesis were investigated in the Cambori{\'u} region, south Brazil. Structural geology and geochemistry were used in order to characterize the link between the high Ba-Sr Itapema Granite (IG)and the syntectonic melting of orthogneisses and amphibolites of the Cambori{\'u} Complex (CC). The IG is a sheet-like intrusive body of biotite monzogranite to granodiorite with large amount of migmatitic amphibolite and gneiss xenoliths, and a well-developed magmatic foliation concordant with the main gneissic banding. Discordant, m-thick granitic dykes which crosscut the migmatitic sequence and transport magma and xenoliths to feed the IG main body mark the transition from the migmatitic to the magmatic system within the complex. Whole-rock geochemical data reveal important contamination and assimilation processes of xenoliths during IG magmatic flow which give rise to different facies and geochemical signatures. The generation of the IG is an example of a continuous exposure from source to sink formed through a continuous and efficient deformation-driven melting/extraction/transport system generated during coeval folding and anatexis of the CC metamorphic sequence.",
keywords = "Extraction dykes, Generation of crustal magmas, Migmatitic system",
author = "Am{\'o}s Martini and Bitencourt, {Maria de F{\'a}tima} and Weinberg, {Roberto F.} and {De Toni}, {Giuseppe Betino} and Lauro, {V. S.Nardi}",
year = "2019",
month = "9",
day = "1",
doi = "10.1016/j.lithos.2019.05.017",
language = "English",
volume = "340-341",
pages = "270--286",
journal = "Lithos",
issn = "0024-4937",
publisher = "Elsevier",

}

From migmatite to magma - crustal melting and generation of granite in the Camboriú Complex, south Brazil. / Martini, Amós; Bitencourt, Maria de Fátima; Weinberg, Roberto F.; De Toni, Giuseppe Betino; Lauro, V. S.Nardi.

In: Lithos, Vol. 340-341, 01.09.2019, p. 270-286.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - From migmatite to magma - crustal melting and generation of granite in the Camboriú Complex, south Brazil

AU - Martini, Amós

AU - Bitencourt, Maria de Fátima

AU - Weinberg, Roberto F.

AU - De Toni, Giuseppe Betino

AU - Lauro, V. S.Nardi

PY - 2019/9/1

Y1 - 2019/9/1

N2 - Partial melting of continental crust and granite genesis were investigated in the Camboriú region, south Brazil. Structural geology and geochemistry were used in order to characterize the link between the high Ba-Sr Itapema Granite (IG)and the syntectonic melting of orthogneisses and amphibolites of the Camboriú Complex (CC). The IG is a sheet-like intrusive body of biotite monzogranite to granodiorite with large amount of migmatitic amphibolite and gneiss xenoliths, and a well-developed magmatic foliation concordant with the main gneissic banding. Discordant, m-thick granitic dykes which crosscut the migmatitic sequence and transport magma and xenoliths to feed the IG main body mark the transition from the migmatitic to the magmatic system within the complex. Whole-rock geochemical data reveal important contamination and assimilation processes of xenoliths during IG magmatic flow which give rise to different facies and geochemical signatures. The generation of the IG is an example of a continuous exposure from source to sink formed through a continuous and efficient deformation-driven melting/extraction/transport system generated during coeval folding and anatexis of the CC metamorphic sequence.

AB - Partial melting of continental crust and granite genesis were investigated in the Camboriú region, south Brazil. Structural geology and geochemistry were used in order to characterize the link between the high Ba-Sr Itapema Granite (IG)and the syntectonic melting of orthogneisses and amphibolites of the Camboriú Complex (CC). The IG is a sheet-like intrusive body of biotite monzogranite to granodiorite with large amount of migmatitic amphibolite and gneiss xenoliths, and a well-developed magmatic foliation concordant with the main gneissic banding. Discordant, m-thick granitic dykes which crosscut the migmatitic sequence and transport magma and xenoliths to feed the IG main body mark the transition from the migmatitic to the magmatic system within the complex. Whole-rock geochemical data reveal important contamination and assimilation processes of xenoliths during IG magmatic flow which give rise to different facies and geochemical signatures. The generation of the IG is an example of a continuous exposure from source to sink formed through a continuous and efficient deformation-driven melting/extraction/transport system generated during coeval folding and anatexis of the CC metamorphic sequence.

KW - Extraction dykes

KW - Generation of crustal magmas

KW - Migmatitic system

UR - http://www.scopus.com/inward/record.url?scp=85066235666&partnerID=8YFLogxK

U2 - 10.1016/j.lithos.2019.05.017

DO - 10.1016/j.lithos.2019.05.017

M3 - Article

VL - 340-341

SP - 270

EP - 286

JO - Lithos

JF - Lithos

SN - 0024-4937

ER -