Petrology, Geochemistry and Geophysics of S-Type Granites and Migmatite Rocks

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Mineral Geochemistry and Geochronology".

Deadline for manuscript submissions: 31 August 2025 | Viewed by 723

Special Issue Editors


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Guest Editor
Institute of Earth Sciences, Department of Geosciences, Environment and Spatial Planning, University of Porto, 4169-007 Porto, Portugal
Interests: igneous and metamorphic petrology; geochemistry; geochronology

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Guest Editor
Departamento de Geologia, Escola de Minas, Universidade Federal de Ouro Preto, Ouro Preto 35400-000, MG, Brazil
Interests: metamorphic petrology; mineral chemistry; EPMA; geochronology

Special Issue Information

Dear Colleagues,

Since the Archean, late-stage collisional orogens are typically characterized by crustal anatexis and generation of granitic bodies. The generation of granitic magmas by intracrustal differentiation and their emplacement in the upper crust leaves behind refractory residues, migmatites, which explain the compositional distinction between the lower and upper crust. Thus, migmatite–granite complexes are commonly observed in the cores of orogenic mountain belts, and geophysical observations have been interpreted to indicate the presence of melt in active orogens. The production of large volumes of melt by partial melting of a source rock depends on protolith fertility, the presence of fluids, and the temperature–pressure conditions.

Migmatite–granite complexes have been the target of several studies with the goal of exploring links between high-grade metamorphism, partial melting processes, the origin of the related granitic bodies and crustal differentiation. In this way, it is also mandatory to explore the connection between migmatite–granite complexes and their protoliths, the existence of crustal-scale structures associated with the anatectic complexes, and the mechanisms associated with their exhumation.

In summary, this Special Issue intends to characterize the petrogenesis and the exhumation of migmatite–granite complexes in ancient and active orogens and how the anatexis during continental collision has contributed to the crustal evolution.

Dr. Joana Ferreira
Dr. Gláucia Queiroga
Guest Editors

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Keywords

  • anatexis
  • S-type granites
  • migmatites
  • geochemistry
  • geochronology
  • geophysics

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Published Papers (2 papers)

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Research

30 pages, 16603 KiB  
Article
Petrogenesis and U–Pb Dating of Variscan S-Type Granites from the Junqueira Batholith (Central Iberian Zone)
by Luís Portela, Maria Rosário Azevedo, Beatriz Valle Aguado, Maria Mafalda Costa and Jorge Medina
Minerals 2025, 15(5), 481; https://doi.org/10.3390/min15050481 - 4 May 2025
Abstract
The Junqueira massif is a syn- to late-kinematic Variscan batholith intruded into Ediacaran-Cambrian metasedimentary rocks of the Douro-Beiras Supergroup (DBSG) in the Central Iberian Zone. The batholith occupies the axial zone of the Porto-Viseu antiform, a large NW-SE trending megascopic domal structure formed [...] Read more.
The Junqueira massif is a syn- to late-kinematic Variscan batholith intruded into Ediacaran-Cambrian metasedimentary rocks of the Douro-Beiras Supergroup (DBSG) in the Central Iberian Zone. The batholith occupies the axial zone of the Porto-Viseu antiform, a large NW-SE trending megascopic domal structure formed during the last Variscan ductile deformation event. Field and petrographic evidence reveals that the Junqueira batholith comprises several units of leucocratic granites distinguished by variations in grain size and relative proportions of the main rock-forming minerals. This work provides new petrographical, geochemical, Sr–Nd isotope data and ID-TIMS U–Pb ages for the Junqueira batholith. U–Pb dating of zircon and monazite by ID-TIMS gives a crystallization age of ca. 312–309 Ma for this batholith. Combined geochemical and Sr–Nd isotopic data for the different granite units (ASI > 1.1; high SiO2 and K2O contents, low CaO, MgO, Ba, Sr, moderately fractionated REE patterns, Eu negative anomalies, 87Sr/86Sri > 0.713, εNd310 = −3.5 to −5.9; TDM = 1.1–1.4 Ga) support a provenance by fluid-absent melting processes of exclusively supracrustal sources (mainly metapelites), similar to the adjoining country rocks of the Beiras Group of the DBSG. Full article
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23 pages, 7514 KiB  
Article
Origin and Implication of the Paoma Granite in the Western Yangtze Block, South China Craton
by Awei Mabi, Changhong Zhong, Yanlong Li, Niuben Yu, Bo Liu, Feifei Lv, Gang Li and Ping Gan
Minerals 2025, 15(2), 188; https://doi.org/10.3390/min15020188 - 18 Feb 2025
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Abstract
The Meso- to Neoproterozoic magmatic rocks cropping out in the western Yangtze Block are pivotal to comprehending the tectonic-magmatic revolutionary processes of the South China Craton during the breakup and assembly of Rodinia. A combined study including a detailed geological survey, systemic measurement [...] Read more.
The Meso- to Neoproterozoic magmatic rocks cropping out in the western Yangtze Block are pivotal to comprehending the tectonic-magmatic revolutionary processes of the South China Craton during the breakup and assembly of Rodinia. A combined study including a detailed geological survey, systemic measurement of the geological section, petrographic observations, geochronology, and elemental geochemistry was carried out on the southern margin of the Paoma granitic pluton in SW China. The obtained data of major elements, along with the mineralogy that includes aluminosilicate minerals, indicate that the studied 825.7 ± 6.0 Ma Paoma granites are peraluminous, which is consistent with an affinity with S-type granites. They show seagull-shaped chondrite-normalized REE patterns with strongly negative Eu anomalies. They are enriched in LRREs and Large Ion Lithophile Elements but are depleted in High Field Strength Elements, with strongly negative Nb, Sr, P, and Ti anomalies. We conclude that the Paoma granite magma originated from the partial melting of clay-rich mudstone from the upper crust. The geochemical data of Paoma granite, integrated with the regional geological context, are consistent with a tectonic setting involving a fossil ridge subduction. The 825.7 Ma Paoma granite, along with the 830 Ma Guandaoshan gabbros showing N-MORB geochemical signatures, defines an east-west trending Neoproterozoic “slab window” in the WYB. Full article
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