scholarly journals Origin, evolution, and tectonic setting of the eastern part of the Mexican Volcanic Belt and comparison with the Central American Volcanic Arc from conventional multielement normalized and new multidimensional discrimination diagrams and discordancy and significance tests

2015 ◽  
Vol 24 ◽  
pp. 111-164 ◽  
Author(s):  
Surendra P. VERMA
Keyword(s):  
Tectonic Setting ◽  
Volcanic Belt ◽  
Central American ◽  
Significance Tests ◽  
Volcanic Arc ◽  
Mexican Volcanic Belt ◽  
Central American Volcanic Arc

scholarly journals Multivariate Analysis, Mass Balance Techniques, and Statistical Tests as Tools in Igneous Petrology: Application to the Sierra de las Cruces Volcanic Range (Mexican Volcanic Belt)

2014 ◽  
Vol 2014 ◽  
pp. 1-32 ◽  
Author(s):  
Fernando Velasco-Tapia
Keyword(s):  
Multivariate Analysis ◽  
Mass Balance ◽  
Magma Mixing ◽  
Statistical Tests ◽  
Tectonic Setting ◽  
Volcanic Rocks ◽  
Volcanic Belt ◽  
Cocos Plate ◽  
Igneous Petrology ◽  
Mexican Volcanic Belt

Magmatic processes have usually been identified and evaluated using qualitative or semiquantitative geochemical or isotopic tools based on a restricted number of variables. However, a more complete and quantitative view could be reached applying multivariate analysis, mass balance techniques, and statistical tests. As an example, in this work a statistical and quantitative scheme is applied to analyze the geochemical features for the Sierra de las Cruces (SC) volcanic range (Mexican Volcanic Belt). In this locality, the volcanic activity (3.7 to 0.5 Ma) was dominantly dacitic, but the presence of spheroidal andesitic enclaves and/or diverse disequilibrium features in majority of lavas confirms the operation of magma mixing/mingling. New discriminant-function-based multidimensional diagrams were used to discriminate tectonic setting. Statistical tests of discordancy and significance were applied to evaluate the influence of the subducting Cocos plate, which seems to be rather negligible for the SC magmas in relation to several major and trace elements. A cluster analysis following Ward’s linkage rule was carried out to classify the SC volcanic rocks geochemical groups. Finally, two mass-balance schemes were applied for the quantitative evaluation of the proportion of the end-member components (dacitic and andesitic magmas) in the comingled lavas (binary mixtures).

Geomorphic and exhumational response of the Central American Volcanic Arc to Cocos Ridge subduction

2012 ◽  
Vol 117 (B4) ◽  
pp. n/a-n/a ◽  
Author(s):  
Kristin D. Morell ◽  
Eric Kirby ◽  
Donald M. Fisher ◽  
Matthijs van Soest
Keyword(s):  
Central American ◽  
Volcanic Arc ◽  
Ridge Subduction ◽  
Central American Volcanic Arc

Bromine and chlorine emissions from Plinian eruptions along the Central American Volcanic Arc: From source to atmosphere

2015 ◽  
Vol 429 ◽  
pp. 234-246 ◽  
Author(s):  
Steffen Kutterolf ◽  
Thor H. Hansteen ◽  
Armin Freundt ◽  
Heidi Wehrmann ◽  
Karen Appel ◽  
...  
Keyword(s):  
Central American ◽  
Volcanic Arc ◽  
Plinian Eruptions ◽  
Central American Volcanic Arc

Trenchward Plio-Quaternary volcanism migration in the Trans-Mexican Volcanic Belt: the case of the Sierra Nevada range

2011 ◽  
Vol 148 (3) ◽  
pp. 492-506 ◽  
Author(s):  
ANITA CADOUX ◽  
YVES MISSENARD ◽  
RAYMUNDO G. MARTINEZ-SERRANO ◽  
HERVÉ GUILLOU
Keyword(s):  
Mexico City ◽  
Sierra Nevada ◽  
Volcanic Activity ◽  
Volcanic Belt ◽  
Quaternary Volcanism ◽  
Volcanic Arc ◽  
Mexican Volcanic Belt ◽  
History Of ◽  
Roll Back ◽  
Southward Migration

AbstractThe Miocene–Quaternary Trans-Mexican Volcanic arc is thought to have grown southwards (i.e. trenchward) since the Pliocene. This theory is mainly supported by roughly N–S-directed polygenetic volcanic ranges along which volcanic activity migrates southwards with time. We investigated the eruptive history of one of these ranges, the Sierra Nevada (east boundary of Mexico City basin), by compiling literature ages and providing new K–Ar dates. Our K–Ar ages are the first ones for the northernmost Tláloc and Telapón volcanoes and for the ancestral Popocatépetl (Nexpayantla). The obtained ages reveal that the four stratovolcanoes forming the range worked contemporaneously during most of the Middle to Late Pleistocene. However, taking into account the onset of the volcanic activity, a southward migration is evidenced along the Sierra Nevada: volcanism initiated at its northern tip at least 1.8 Ma ago at Tláloc volcano, extended southwards 1 Ma ago with Iztaccíhuatl and appeared at its southern end 329 ka ago with the Nexpayantla cone. Such a migration would be most probably primarily driven by Cocos slab roll-back and steepening rather than by regional crustal tectonics, which played a secondary role by controlling the apparent alignment of the volcanoes.

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