Petrogenesis and geodynamic implications of the Late Cretaceous granitoids in Puerto Libertad, Sonora, México: Insights into geochemical signatures of adakites, adakitic affinity and calc-alkaline rocks in NW Mexico

Alejandra M. Gómez-Valencia; Arturo J. Barrón-Díaz; Iván R. Espinoza-Encinas; Rufino Lozano-Santa Cruz; Alexander Iriondo; Francisco A. Paz-Moreno; Jesús R. Vidal-Solano

doi:10.1016/j.jsames.2022.103996

Petrogenesis and geodynamic implications of the Late Cretaceous granitoids in Puerto Libertad, Sonora, México: Insights into geochemical signatures of adakites, adakitic affinity and calc-alkaline rocks in NW Mexico

Alejandra M. Gómez-Valencia, Arturo J. Barrón-Díaz^*, Iván R. Espinoza-Encinas, Rufino Lozano-Santa Cruz, Alexander Iriondo, Francisco A. Paz-Moreno, Jesús R. Vidal-Solano

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Paleozoic and Mesozoic stratigraphic sequences in the Puerto Libertad area, NW Sonora, Mexico, are intruded by Laramide granitic plutons with dominantly alkaline affinity. We conducted a petrogenetic study of these bodies across a north-south 35 km long transect at oriented NW-SE which includes the Sierra Picú (SP), El Destierro (ED), Sierra Tordilla (ST) and Sierra Los Mochos (SLM). The intrusive bodies display abundant Mafic Microgranular Enclaves (MME) and are intruded by aplitic and pegmatitic dike swarms. U/Pb zircon dates of the intrusive rocks yield crystallization ages between 71.9 and 74.9 Ma. Granodioritic and mozogranitic rocks dominate the SP and ED, while syenogranitic rocks dominate the ST and SLM regions. In addition, these rocks show notable effects, by normal and listric faults which includes cataclastic rocks. Geothermobarometry data from amphiboles and plagioclase of the granodiorites suggest that the temperatures and pressures reached 711–740 °C and 1.67–2.43 kb. respectively, and were emplaced at depths between ∼5 and 6 km. Geochemically, this magmatism shows a relatively high silica content (56–75 wt%), values of Sr/Y = 29–50, La/Yb = 26–39, Sr up to 600 ppm and Ba up to 1400 ppm and depleted in highfield strength elements. Collectively these geochemical traits accentuate the adakite signature of these rocks. This work raises the current problems related to the petrogenetic and tectonic aspects for the generation of calc-alkaline and adakitic magmas while proposing ternary discrimination diagrams to aid in the discrimination from classic calk-alkaline, adakites and adakitic affinity magmatism.

Original language	English
Article number	103996
Journal	Journal of South American Earth Sciences
Volume	119
DOIs	https://doi.org/10.1016/j.jsames.2022.103996
State	Published - Nov 2022

Bibliographical note

Funding Information:
The authors extend special thanks to the following projects and institutions: (1) Vicerrectoría UNISON for geochronology founding; (2) We are thankful to James Hagadorn and patrons from the Denver Museum of Nature & Science for funding for EMPA; (3) CONACYT Project 180784 ″Geodynamic Evolution of the Proto-Gulf of California: Emphasis on the volcanic remains of the Miocene in Sonora, Mexico”/Dr. Jesus Roberto Vidal Solano for the financing of field work; and (4) Geology Department at UNISON and Igneous Petrology students who collaborate in fieldwork. (5) We are also thankful to K. Domanik for the EMPA support and Aimé Orcí Romero for the thin section fabrication at ERNO-UNAM. (6) Irene Pérez Casillas, Concepción Arredondo de la Rosa from CarMinLab are acknowledge for their help with zircon mineral separation and CL imagining. (7) We are thankful with the suggestions of four anonymous reviewers which greatly help to improve this manuscript.

Publisher Copyright:
© 2022 Elsevier Ltd

Keywords

Geochemical adakite signature
Geothermobarometry
Laramide continental arc
Puerto libertad
Sonora
U–Pb zircon geochronology

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Gómez-Valencia, A. M., Barrón-Díaz, A. J., Espinoza-Encinas, I. R., Lozano-Santa Cruz, R., Iriondo, A., Paz-Moreno, F. A., & Vidal-Solano, J. R. (2022). Petrogenesis and geodynamic implications of the Late Cretaceous granitoids in Puerto Libertad, Sonora, México: Insights into geochemical signatures of adakites, adakitic affinity and calc-alkaline rocks in NW Mexico. Journal of South American Earth Sciences, 119, Article 103996. https://doi.org/10.1016/j.jsames.2022.103996

Gómez-Valencia, Alejandra M. ; Barrón-Díaz, Arturo J. ; Espinoza-Encinas, Iván R. et al. / Petrogenesis and geodynamic implications of the Late Cretaceous granitoids in Puerto Libertad, Sonora, México : Insights into geochemical signatures of adakites, adakitic affinity and calc-alkaline rocks in NW Mexico. In: Journal of South American Earth Sciences. 2022 ; Vol. 119.

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abstract = "Paleozoic and Mesozoic stratigraphic sequences in the Puerto Libertad area, NW Sonora, Mexico, are intruded by Laramide granitic plutons with dominantly alkaline affinity. We conducted a petrogenetic study of these bodies across a north-south 35 km long transect at oriented NW-SE which includes the Sierra Pic{\'u} (SP), El Destierro (ED), Sierra Tordilla (ST) and Sierra Los Mochos (SLM). The intrusive bodies display abundant Mafic Microgranular Enclaves (MME) and are intruded by aplitic and pegmatitic dike swarms. U/Pb zircon dates of the intrusive rocks yield crystallization ages between 71.9 and 74.9 Ma. Granodioritic and mozogranitic rocks dominate the SP and ED, while syenogranitic rocks dominate the ST and SLM regions. In addition, these rocks show notable effects, by normal and listric faults which includes cataclastic rocks. Geothermobarometry data from amphiboles and plagioclase of the granodiorites suggest that the temperatures and pressures reached 711–740 °C and 1.67–2.43 kb. respectively, and were emplaced at depths between ∼5 and 6 km. Geochemically, this magmatism shows a relatively high silica content (56–75 wt%), values of Sr/Y = 29–50, La/Yb = 26–39, Sr up to 600 ppm and Ba up to 1400 ppm and depleted in highfield strength elements. Collectively these geochemical traits accentuate the adakite signature of these rocks. This work raises the current problems related to the petrogenetic and tectonic aspects for the generation of calc-alkaline and adakitic magmas while proposing ternary discrimination diagrams to aid in the discrimination from classic calk-alkaline, adakites and adakitic affinity magmatism.",

keywords = "Geochemical adakite signature, Geothermobarometry, Laramide continental arc, Puerto libertad, Sonora, U–Pb zircon geochronology",

author = "G{\'o}mez-Valencia, {Alejandra M.} and Barr{\'o}n-D{\'i}az, {Arturo J.} and Espinoza-Encinas, {Iv{\'a}n R.} and {Lozano-Santa Cruz}, Rufino and Alexander Iriondo and Paz-Moreno, {Francisco A.} and Vidal-Solano, {Jes{\'u}s R.}",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd",

year = "2022",

month = nov,

doi = "10.1016/j.jsames.2022.103996",

language = "Ingl{\'e}s",

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Gómez-Valencia, AM, Barrón-Díaz, AJ, Espinoza-Encinas, IR, Lozano-Santa Cruz, R, Iriondo, A, Paz-Moreno, FA & Vidal-Solano, JR 2022, 'Petrogenesis and geodynamic implications of the Late Cretaceous granitoids in Puerto Libertad, Sonora, México: Insights into geochemical signatures of adakites, adakitic affinity and calc-alkaline rocks in NW Mexico', Journal of South American Earth Sciences, vol. 119, 103996. https://doi.org/10.1016/j.jsames.2022.103996

Petrogenesis and geodynamic implications of the Late Cretaceous granitoids in Puerto Libertad, Sonora, México: Insights into geochemical signatures of adakites, adakitic affinity and calc-alkaline rocks in NW Mexico. / Gómez-Valencia, Alejandra M.; Barrón-Díaz, Arturo J.; Espinoza-Encinas, Iván R. et al.
In: Journal of South American Earth Sciences, Vol. 119, 103996, 11.2022.

Research output: Contribution to journal › Article › peer-review

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T1 - Petrogenesis and geodynamic implications of the Late Cretaceous granitoids in Puerto Libertad, Sonora, México

T2 - Insights into geochemical signatures of adakites, adakitic affinity and calc-alkaline rocks in NW Mexico

AU - Gómez-Valencia, Alejandra M.

AU - Barrón-Díaz, Arturo J.

AU - Espinoza-Encinas, Iván R.

AU - Lozano-Santa Cruz, Rufino

AU - Iriondo, Alexander

AU - Paz-Moreno, Francisco A.

AU - Vidal-Solano, Jesús R.

PY - 2022/11

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N2 - Paleozoic and Mesozoic stratigraphic sequences in the Puerto Libertad area, NW Sonora, Mexico, are intruded by Laramide granitic plutons with dominantly alkaline affinity. We conducted a petrogenetic study of these bodies across a north-south 35 km long transect at oriented NW-SE which includes the Sierra Picú (SP), El Destierro (ED), Sierra Tordilla (ST) and Sierra Los Mochos (SLM). The intrusive bodies display abundant Mafic Microgranular Enclaves (MME) and are intruded by aplitic and pegmatitic dike swarms. U/Pb zircon dates of the intrusive rocks yield crystallization ages between 71.9 and 74.9 Ma. Granodioritic and mozogranitic rocks dominate the SP and ED, while syenogranitic rocks dominate the ST and SLM regions. In addition, these rocks show notable effects, by normal and listric faults which includes cataclastic rocks. Geothermobarometry data from amphiboles and plagioclase of the granodiorites suggest that the temperatures and pressures reached 711–740 °C and 1.67–2.43 kb. respectively, and were emplaced at depths between ∼5 and 6 km. Geochemically, this magmatism shows a relatively high silica content (56–75 wt%), values of Sr/Y = 29–50, La/Yb = 26–39, Sr up to 600 ppm and Ba up to 1400 ppm and depleted in highfield strength elements. Collectively these geochemical traits accentuate the adakite signature of these rocks. This work raises the current problems related to the petrogenetic and tectonic aspects for the generation of calc-alkaline and adakitic magmas while proposing ternary discrimination diagrams to aid in the discrimination from classic calk-alkaline, adakites and adakitic affinity magmatism.

AB - Paleozoic and Mesozoic stratigraphic sequences in the Puerto Libertad area, NW Sonora, Mexico, are intruded by Laramide granitic plutons with dominantly alkaline affinity. We conducted a petrogenetic study of these bodies across a north-south 35 km long transect at oriented NW-SE which includes the Sierra Picú (SP), El Destierro (ED), Sierra Tordilla (ST) and Sierra Los Mochos (SLM). The intrusive bodies display abundant Mafic Microgranular Enclaves (MME) and are intruded by aplitic and pegmatitic dike swarms. U/Pb zircon dates of the intrusive rocks yield crystallization ages between 71.9 and 74.9 Ma. Granodioritic and mozogranitic rocks dominate the SP and ED, while syenogranitic rocks dominate the ST and SLM regions. In addition, these rocks show notable effects, by normal and listric faults which includes cataclastic rocks. Geothermobarometry data from amphiboles and plagioclase of the granodiorites suggest that the temperatures and pressures reached 711–740 °C and 1.67–2.43 kb. respectively, and were emplaced at depths between ∼5 and 6 km. Geochemically, this magmatism shows a relatively high silica content (56–75 wt%), values of Sr/Y = 29–50, La/Yb = 26–39, Sr up to 600 ppm and Ba up to 1400 ppm and depleted in highfield strength elements. Collectively these geochemical traits accentuate the adakite signature of these rocks. This work raises the current problems related to the petrogenetic and tectonic aspects for the generation of calc-alkaline and adakitic magmas while proposing ternary discrimination diagrams to aid in the discrimination from classic calk-alkaline, adakites and adakitic affinity magmatism.

KW - Geochemical adakite signature

KW - Geothermobarometry

KW - Laramide continental arc

KW - Puerto libertad

KW - Sonora

KW - U–Pb zircon geochronology

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DO - 10.1016/j.jsames.2022.103996

M3 - Artículo

AN - SCOPUS:85138015858

SN - 0895-9811

VL - 119

JO - Journal of South American Earth Sciences

JF - Journal of South American Earth Sciences

M1 - 103996

ER -

Gómez-Valencia AM, Barrón-Díaz AJ, Espinoza-Encinas IR, Lozano-Santa Cruz R, Iriondo A, Paz-Moreno FA et al. Petrogenesis and geodynamic implications of the Late Cretaceous granitoids in Puerto Libertad, Sonora, México: Insights into geochemical signatures of adakites, adakitic affinity and calc-alkaline rocks in NW Mexico. Journal of South American Earth Sciences. 2022 Nov;119:103996. doi: 10.1016/j.jsames.2022.103996

Petrogenesis and geodynamic implications of the Late Cretaceous granitoids in Puerto Libertad, Sonora, México: Insights into geochemical signatures of adakites, adakitic affinity and calc-alkaline rocks in NW Mexico

Abstract

Bibliographical note

Keywords

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