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funding vehicle for: Petrology and geochemistry of meta-ultramafic rocks in the Paleozoic Granjeno Schist, northeastern Mexico: Remnants of Pangaea ocean floor

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Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata
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funding vehicle for: Petrology and geochemistry of meta-ultramafic rocks in the Paleozoic Granjeno Schist, northeastern Mexico: Remnants of Pangaea ocean floor

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Consejo Nacional de Ciencia y Tecnología, CONACYT: 239341
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Friedrich-Schiller-Universität Jena, FSU
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funding vehicle for: Petrology and geochemistry of meta-ultramafic rocks in the Paleozoic Granjeno Schist, northeastern Mexico: Remnants of Pangaea ocean floor

Universidad Autónoma de Nuevo León, UANL
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funding vehicle for: Petrology and geochemistry of meta-ultramafic rocks in the Paleozoic Granjeno Schist, northeastern Mexico: Remnants of Pangaea ocean floor

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individual
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date: 2026-08-25T22:12:03
publisher: vivo
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label: RDF description of Petrology and geochemistry of meta-ultramafic rocks in the Paleozoic Granjeno Schist, northeastern Mexico: Remnants of Pangaea ocean floor - http://orbis.uaslp.mx/vivo/individual/scopus4858

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Open Geosciences
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publication venue for: Petrology and geochemistry of meta-ultramafic rocks in the Paleozoic Granjeno Schist, northeastern Mexico: Remnants of Pangaea ocean floor
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Petrology and geochemistry of meta-ultramafic rocks in the Paleozoic Granjeno Schist, northeastern Mexico: Remnants of Pangaea ocean floor
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estado: published
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date time value: article date 4859
e iscopus: 2-s2.0-85028655312
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origen: scopus
page end: 384
has funding vehicle: Consejo Nacional de Ciencia y Tecnología, CONACYT: 239341
page start: 361
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accesstype: All Open Access, Gold, Green
has funding vehicle: Universidad Autónoma de Nuevo León, UANL
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most specific type: Document
doi: 10.1515/geo-2017-0029
has funding vehicle: Deutscher Akademischer Austauschdienst, DAAD
issue: 1
type: Entity
volume: 9
abstract: The Granjeno Schist is a meta-volcanosedimentary upper Paleozoic complex in northeastern Mexico. We suggest different tectonic settings for metamorphism of its serpentinite and talc-bearing rocks based on petrographic and geochemical compositions. According to the REE ratios (LaN/YbN = 0.51-20.0 and LaN/SmN = 0.72-9.1) and the enrichment in the highly incompatible elements Cs (0.1 ppm), U (2.8 ppm), and Zr (60 ppm) as well as depletion in Ba (1-15 ppm), Sr (1-184 ppm), Pb (0.1-14 ppm), and Ce (0.1-1.9 ppm) the rocks have mid-ocean ridge and subduction zones characteristics. The serpentinite contains Al-chromite, ferrian chromite and magnetite. The Al-chromite is characterized by Cr# of 0.48 to 0.55 suggesting a MORB origin, and Cr# of 0.93 to 1.00 for the ferrian chromite indicates a prograde metamorphism. We propose at least two serpentinization stages of lithospheric mantle for the ultramafic rock of the Granjeno Schist, (1) a first in an ocean-floor environment at sub-greenschist to greenschist facies conditions and (2) later a serpentinization phase related to the progressive replacement of spinel by ferrian chromite and magnetite at greenschist to low amphibolite facies conditions during regional metamorphism. The second serpentinization phase took place in an active continental margin during the Pennsylvanian. We propose that the origin of the ultramafic rocks is related to an obduction and accretional event at the western margin of Pangea. © 2017 Sonia Alejandra Torres-Sánchez et al. 2017.
has publication venue: Open Geosciences
crisid: 4859
freetext keyword: Gondwana; Granjeno Schist; northeastern Mexico; Pangea; serpentinite; ultramafic rocks Aluminum; Chromite; Chromite deposits; Geochemistry; Geochronology; Magnetite; Strontium; Talc deposits; Uranium; Gondwana; Granjeno Schist; Me-xico; Pangea; Serpentinite; Ultramafic rocks; Rocks; Gondwana; igneous geochemistry; metamorphism; Paleozoic; petrology; schist; seafloor; serpentinite; ultramafic rock; Mexico [North America]; Celtis pallida
has funding vehicle: Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata
has funding vehicle: Friedrich-Schiller-Universität Jena, FSU