Crystallization Conditions and Petrogenetic Characterization of Metaluminous to Peraluminous Calc-Alkaline Orogenic Granitoids from Mineralogical Systematics: The Case of the Cambrian Magmatism from the Sierra de Guasayán (Argentina)

Zandomeni, Priscila S.; Moreno, Juan A.; Verdecchia, Sebastián O.; Baldo, Edgardo G.; Dahlquist, Juan A.; Morales Cámera, Matías M.; Balbis, Catalina; Benítez, Manuela; Serra-Varela, Samanta; Lembo Wuest, Carlos I.

doi:10.3390/min11020166

Open AccessArticle

Crystallization Conditions and Petrogenetic Characterization of Metaluminous to Peraluminous Calc-Alkaline Orogenic Granitoids from Mineralogical Systematics: The Case of the Cambrian Magmatism from the Sierra de Guasayán (Argentina)

by

Priscila S. Zandomeni

^1,2

,

Juan A. Moreno

^1,2,*

,

Sebastián O. Verdecchia

^1,2

,

Edgardo G. Baldo

^1,2

,

Juan A. Dahlquist

^1,2

,

Matías M. Morales Cámera

^1,2

,

Catalina Balbis

^1,2,

Manuela Benítez

³,

Samanta Serra-Varela

^4,5

and

Carlos I. Lembo Wuest

^1,2

¹

Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Centro de Investigaciones en Ciencias de la Tierra (CICTERRA), Córdoba X5016CGA, Argentina

²

Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Córdoba X5016CGA, Argentina

³

Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CICPBA), Instituto de Recursos Minerales (INREMI), Universidad Nacional de La Plata–CICPBA, La Plata B1904AMC, Argentina

⁴

Instituto de Investigación en Paleobiología y Geología, Universidad Nacional de Río Negro, Río Negro 8332, Argentina

⁵

Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Ciudad Autónoma de Buenos Aires, Buenos Aires C113AAD, Argentina

^*

Author to whom correspondence should be addressed.

Minerals 2021, 11(2), 166; https://doi.org/10.3390/min11020166

Submission received: 28 December 2020 / Revised: 29 January 2021 / Accepted: 31 January 2021 / Published: 5 February 2021

(This article belongs to the Special Issue Distribution of Major- and Trace-Elements in Igneous Minerals)

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Abstract

The Sierra de Guasayán (Eastern Sierras Pampeanas, Argentina) is formed by low to medium grade metamorphic rocks intruded by Cambrian metaluminous (La Soledad quartz-diorite), slightly peraluminous (Guasayán, El Escondido and El Martirizado granodiorite plutons), and strongly peraluminous (Alto Bello granodiorite) granitoids of the Pampean magmatic arc. Chemical compositions of amphibole, plagioclase, biotite, and titanite indicate that these granitoids were emplaced at low pressure (mostly <3 kbar) and temperature (<770 °C) under oxidizing conditions (QFM + 1 and QFM + 2), which are similar to the emplacement conditions reported for other granites of the Pampean magmatic arc. Mineral assemblages and whole-rock and mineral chemistry of the granitoids from the Sierra de Guasayán indicate an I-type affinity for the La Soledad quartz-diorite (amphibole, biotite, and titanite), S-type affinity for the Alto Bello granodiorite (biotite, muscovite, cordierite, and sillimanite), and a hybrid nature for the main Guasayán and El Escondido plutons (biotite, monazite, and magnetite). This hybrid nature is supported by the presence of abundant mafic microgranular enclaves and rapakivi texture and by published zircon Hf-isotope data (εHf_i ranging from −4.76 to −0.12). This suggests, in turn, the involvement of hybridization in the genesis of these granitoids, which seems to be a common mechanism operating in the Pampean magmatic arc.

Keywords: I-type granitoids; S-type granitoids; hybrid granitoids; mineral chemistry; geothermobarometry; Sierra de Guasayán; Pampean Orogeny

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MDPI and ACS Style

Zandomeni, P.S.; Moreno, J.A.; Verdecchia, S.O.; Baldo, E.G.; Dahlquist, J.A.; Morales Cámera, M.M.; Balbis, C.; Benítez, M.; Serra-Varela, S.; Lembo Wuest, C.I. Crystallization Conditions and Petrogenetic Characterization of Metaluminous to Peraluminous Calc-Alkaline Orogenic Granitoids from Mineralogical Systematics: The Case of the Cambrian Magmatism from the Sierra de Guasayán (Argentina). Minerals 2021, 11, 166. https://doi.org/10.3390/min11020166

AMA Style

Zandomeni PS, Moreno JA, Verdecchia SO, Baldo EG, Dahlquist JA, Morales Cámera MM, Balbis C, Benítez M, Serra-Varela S, Lembo Wuest CI. Crystallization Conditions and Petrogenetic Characterization of Metaluminous to Peraluminous Calc-Alkaline Orogenic Granitoids from Mineralogical Systematics: The Case of the Cambrian Magmatism from the Sierra de Guasayán (Argentina). Minerals. 2021; 11(2):166. https://doi.org/10.3390/min11020166

Chicago/Turabian Style

Zandomeni, Priscila S., Juan A. Moreno, Sebastián O. Verdecchia, Edgardo G. Baldo, Juan A. Dahlquist, Matías M. Morales Cámera, Catalina Balbis, Manuela Benítez, Samanta Serra-Varela, and Carlos I. Lembo Wuest. 2021. "Crystallization Conditions and Petrogenetic Characterization of Metaluminous to Peraluminous Calc-Alkaline Orogenic Granitoids from Mineralogical Systematics: The Case of the Cambrian Magmatism from the Sierra de Guasayán (Argentina)" Minerals 11, no. 2: 166. https://doi.org/10.3390/min11020166

APA Style

Zandomeni, P. S., Moreno, J. A., Verdecchia, S. O., Baldo, E. G., Dahlquist, J. A., Morales Cámera, M. M., Balbis, C., Benítez, M., Serra-Varela, S., & Lembo Wuest, C. I. (2021). Crystallization Conditions and Petrogenetic Characterization of Metaluminous to Peraluminous Calc-Alkaline Orogenic Granitoids from Mineralogical Systematics: The Case of the Cambrian Magmatism from the Sierra de Guasayán (Argentina). Minerals, 11(2), 166. https://doi.org/10.3390/min11020166

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Crystallization Conditions and Petrogenetic Characterization of Metaluminous to Peraluminous Calc-Alkaline Orogenic Granitoids from Mineralogical Systematics: The Case of the Cambrian Magmatism from the Sierra de Guasayán (Argentina)

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