Present state of knowledge and new geochemical constraints on the central part of the Mexican Volcanic Belt and comparison with the Central American Volcanic Arc in terms of near and far trench magmas

Verma, Surendra P.

doi:10.3906/yer-1504-20

Cited by 22 publications

(21 citation statements)

References 374 publications

(583 reference statements)

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“…Zamora‐Camacho et al (2010) also compiled earthquake hypocentre data but the uncertainties in the depths were not mentioned. Uncertainties of over 100% are commonly observed in such seismic depth data, as documented by Verma (2015). Therefore, the seismic depths as estimated by most workers should be viewed with caution.…”

Section: Discussionmentioning

confidence: 87%

“…Without repeating the number of samples and total probability values (Table 5) in the text, we can infer that the tectonic setting for the Xalapa region during the Quaternary was also continental extension. Verma (2015). Therefore, the seismic depths as estimated by most workers should be viewed with caution.…”

Section: Tectonic Setting From the Multidimensional Solutionmentioning

confidence: 99%

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Geochemistry, petrogenesis, and tectonic setting of the Los Tuxtlas Volcanic Field, Mexico

et al. 2020

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We present new major and trace element geochemical data, including the rare‐earth elements (REE), platinum group elements and Au, and combine them with the published information to constrain the highly debated origin of magmas in the Los Tuxtlas Volcanic Field (LTVF) of the Late Miocene to historic age. The LTVF magmas originated in the garnet‐bearing mantle as confirmed from the partial melting models of the REE. The mantle‐derived magmas may have subsequently undergone fractional crystallization of mainly olivine. The controversial tectonic setting of the LTVF was solved by log‐ratio transformed major as well as combined major and trace element data as a continental strike‐slip fault setting during the Miocene–Pliocene. During the Pleistocene to Holocene, the more numerous samples having only major elements alone indicated the continental strike‐slip fault setting, whereas the lesser number of samples having combined major and trace elements were more consistent with the continental extension. Importantly, no geochemical evidence for the involvement of the subducting slab in the magma genesis of the LTVF could be inferred. The inferences presented in this work were consistent with the entirety of geological, geochemical, and geophysical evidence. The multidimensional models also showed that the monogenetic volcanic field of the Xalapa region of the easternmost part of the Mexican Volcanic Belt represents a continental extension setting.

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Section: Discussionmentioning

confidence: 87%

Section: Tectonic Setting From the Multidimensional Solutionmentioning

confidence: 99%

Geochemistry, petrogenesis, and tectonic setting of the Los Tuxtlas Volcanic Field, Mexico

et al. 2020

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“…Nevertheless, the database is an updated version of the databases used by Verma et al . [], Verma and Verma [], and Verma []; these authors provided the relevant literature references from which their databases were prepared.…”

Section: Methodsmentioning

confidence: 99%

“…On the other hand, although the sources of data for Common igneous rocks are too numerous to list them in this paper, a complete list of these references is available from our website http://tlaloc.ier.unam.mx/index.html. Nevertheless, the database is an updated version of the databases used by Verma et al [2006, , Geochemistry, Geophysics, Geosystems 10.1002/2016GC006652 and Verma [2015b]; these authors provided the relevant literature references from which their databases were prepared.…”

Section: Databasementioning

confidence: 99%

Log‐ratio transformed major element based multidimensional classification for altered High‐Mg igneous rocks

Verma

Rivera-Gómez

Díaz-González

et al. 2016

Geochem Geophys Geosyst

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A new multidimensional classification scheme consistent with the chemical classification of the International Union of Geological Sciences (IUGS) is proposed for the nomenclature of High‐Mg altered rocks. Our procedure is based on an extensive database of major element (SiO2, TiO2, Al2O3, Fe2 O3t, MnO, MgO, CaO, Na2O, K2O, and P2O5) compositions of a total of 33,868 (920 High‐Mg and 32,948 “Common”) relatively fresh igneous rock samples. The database consisting of these multinormally distributed samples in terms of their isometric log‐ratios was used to propose a set of 11 discriminant functions and 6 diagrams to facilitate High‐Mg rock classification. The multinormality required by linear discriminant and canonical analysis was ascertained by a new computer program DOMuDaF. One multidimensional function can distinguish the High‐Mg and Common igneous rocks with high percent success values of about 86.4% and 98.9%, respectively. Similarly, from 10 discriminant functions the High‐Mg rocks can also be classified as one of the four rock types (komatiite, meimechite, picrite, and boninite), with high success values of about 88%–100%. Satisfactory functioning of this new classification scheme was confirmed by seven independent tests. Five further case studies involving application to highly altered rocks illustrate the usefulness of our proposal. A computer program HMgClaMSys was written to efficiently apply the proposed classification scheme, which will be available for online processing of igneous rock compositional data. Monte Carlo simulation modeling and mass‐balance computations confirmed the robustness of our classification with respect to analytical errors and postemplacement compositional changes.

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“…The evaluation of the Nb and Ta anomalies has been statistically described to understand possible tectonic setting. Verma (2015) has already compiled the Nb and Ta anomalies values for basic, intermediate, and acidic magmas from several tectonic settings worldwide. In this study, we have calculated Nb and Ta anomalies values for the felsic volcanic rocks from the MVC follow the compilation of Verma (2015), and these results are reported in Table 3.…”

Section: Partial Melt Processmentioning

confidence: 99%

Geochemistry of Eocene felsic volcanic rocks from the Mesa Virgen‐Calerilla, Zacatecas, Mexico: Implications for the magma source and tectonic setting

et al. 2021

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The Mesa Virgen Calerilla (MVC) is located in the state of Zacatecas, Mexico. The most intense volcanism, which occurred during the Eocene, formed extensive ignimbrite deposits exposed in some parts as lava spills of rhyolitic (felsic) composition. This felsic volcanism may represent much of the MVC. This study describes wholerock geochemistry and mineralogy data from felsic volcanic rocks in the MVC to address their petrogenesis and tectonic setting. The MVC covers a compositional spectrum ranging from trachyte, dacite, to high-silica rhyolite. The petrography and mineral assemblages indicate that the felsic rocks are composed of K-feldspar (sanidine), quartz, plagioclase, and biotite. The felsic volcanic rocks have a composition of 64.08-78.17 wt% (SiO 2 ) adj , 0.14-0.69 wt% (TiO 2 ) adj , and 0.11-0.62 wt% (MgO) adj with 12-54 Mg number [Mg# = 100 × (Mg 2+ /[Mg 2+ + Fe 2+ ])]. These felsic volcanic rocks showed enrichment in light rare earth elements (LREE; [La/ Sm] N = 3.80-7.19), and are depleted in heavy rare earth elements [HREE; (Tb/Yb) N ratios 0.35-1.84], along with negative Ba, Nb, Sr, P, Eu, and Ti anomalies. The geochemical characteristics and petrogenetic modelling indicate that felsic volcanic rocks are derived from partial melting process of an upper-middle continental crust. The tectono-magmatic model and multidimensional tectonic discrimination diagram indicate that an extensional-related setting prevails for the MVC.

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Present state of knowledge and new geochemical constraints on the central part of the Mexican Volcanic Belt and comparison with the Central American Volcanic Arc in terms of near and far trench magmas

Cited by 22 publications

References 374 publications

Geochemistry, petrogenesis, and tectonic setting of the Los Tuxtlas Volcanic Field, Mexico

Geochemistry, petrogenesis, and tectonic setting of the Los Tuxtlas Volcanic Field, Mexico

Log‐ratio transformed major element based multidimensional classification for altered High‐Mg igneous rocks

Geochemistry of Eocene felsic volcanic rocks from the Mesa Virgen‐Calerilla, Zacatecas, Mexico: Implications for the magma source and tectonic setting

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