Volcanic evolution of the back-arc Pleistocene Payun Matru volcanic field (Argentina)

Germa, A.; Quidelleur, Xavier; Gillot, Pierre‐Yves; Tchilinguirián, Pablo

doi:10.1016/j.jsames.2010.01.002

Cited by 69 publications

(73 citation statements)

References 27 publications

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“…The Cassignol-Gillot technique is especially suitable to date young, low-K and high-Ca lavas for which the 40 Ar/ 39 Ar technique often bears relatively large uncertainties due to the undesirable production of 36 Ar and 37 Ar from calcium during neutronic activation of the sample in a nuclear reactor (e.g., Gillot et al, 2006). Previous results of the unspiked K/Ar Cassignol-Gillot technique have proved to be particularly appropriate to accurately date Holocene basalts and andesites with an uncertainty of a few kyr (e.g., Gillot and Cornette, 1986;Lahitte et al, 2003;Samper et al, 2009;Germa et al, 2010). It has been extended to the last millennium with an uncertainty of only a few centuries in the case of higher-K lavas such as the "lavas negras" on Tenerife .…”

Section: Sampling and Methodsmentioning

confidence: 99%

Eruptive response of oceanic islands to giant landslides: New insights from the geomorphologic evolution of the Teide–Pico Viejo volcanic complex (Tenerife, Canary)

Boulesteix¹,

Hildenbrand²,

Gillot³

et al. 2012

Geomorphology

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Section: Sampling and Methodsmentioning

confidence: 99%

Eruptive response of oceanic islands to giant landslides: New insights from the geomorphologic evolution of the Teide–Pico Viejo volcanic complex (Tenerife, Canary)

Boulesteix¹,

Hildenbrand²,

Gillot³

et al. 2012

Geomorphology

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“…3a, b). These basaltic centers were contemporaneous with the evolution of Payún Matrú volcano, and the eruptions of the older basalts were also contemporaneous with the Payún Liso volcano (Llambías, 1966;germa et al, 2010).…”

Section: Geology Of the Payún Matrú Volcanic Fieldmentioning

confidence: 99%

Volcanic stratigraphy and evidence of magma mixing in the Quaternary Payun Matru volcano, andean backarc in western Argentina

Hernando¹,

Llambías²,

González³

et al. 2012

Andgeo

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AbStRAct. The Payún Matrú Volcanic Field is located in the Payenia Basaltic Province of the recent back-arc of western Argentina (35°S-38°S). This province is younger than 5 Ma, and most of its volcanic activity took place since 2 Ma. The Payún Matrú Volcanic Field contains two composite volcanoes, Payún Matrú and Payún Liso, and two basaltic fields in an E-W oriented zone, located east and west of the Payún Matrú volcano. Payún Matrú is the largest volcano of this volcanic field, and consists of a shield-shaped edifice with a circular summit caldera of 8 km in diameter. The composition of both composite volcanoes is alkaline and predominantly trachytic, having also minor intermediate lavas.The basaltic fields consist of basalts and trachybasalts, with clinopyroxene and abundant olivine as phenocrysts and also in the groundmass. Textures indicating mixing and mingling processes, such as dusty plagioclases along with clear ones, biotite replaced by anhydrous minerals and two groundmasses with a fluid-fluid relationship, are common in the early pre-caldera stage of Payún Matrú and some post-caldera lavas. The latest post-caldera lavas are trachytic, with clean sanidine phenocrysts without disequilibrium textures. A remarkable characteristic of the Payún Matrú Volcanic Field is the fact that the Payún Matrú caldera is surrounded by basaltic fields at its base, while no basalts were erupted in the caldera region. We propose that the absence of basaltic lavas in the Payún Matrú volcano is due to the presence of a magmatic chamber below it, and that the mafic magmas rising from deeper levels were unable to erupt without interaction with more evolved melts. Intermediate hybrid magmas produced as a consequence of magma mixing and mingling between basaltic and trachytic magmas, are present in the early and mid-history of Payún Matrú volcano. We present here new information about the Quaternary Payún Matrú Volcanic Field derived from field work, petrography, and major element geochemistry and 87 Sr/ 86 Sr isotopic ratios. For the first time a detailed map of the Payún Matrú Volcanic Field and its volcanic stratigraphy, primarily based on field observations, are presented. RESuMEn. Estratigrafía volcánica y evidencia de mezcla de magmas en el volcán Payún Matrú del cuaternario, en el retroarco andino de Argentina occidental. El Campo Volcánico Payún Matrú está localizado en la Provincia Basáltica Payenia, en el retroarco reciente al oeste de Argentina (35°S-38°S). Esta provincia es más joven que 5 Ma, y la mayor parte de su actividad volcánica tuvo lugar desde hace 2 Ma. El Campo Volcánico Payún Matrú contiene dos volcanes compuestos, el Payún Matrú y el Payún Liso, así como dos campos basálticos en una franja E-W, ubicados al este y oeste del Payún Matrú. El Payún Matrú es el volcán más grande de este campo volcánico, y consiste en un edificio en forma de escudo con una caldera circular en su cúspide de 8 km de diámetro. La composición de ambos volcanes compuestos es alcalina y predominantemente traquítica, con menor...

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“…Nonetheless, examination of the list of Holocene volcanic fields compiled by Simkin (2002-2011), inspection of satellite images using GoogleEarth, as well as a review of recent papers on selected areas, provide some insight into the characteristics of young monogenetic fields in volcanic arcs wordwide (here, we only consider groups of >5 volcanoes with published Holocene ages). Many of these fields occur in extensional back-arc settings (e.g., Auckland volcanic field, New Zealand, Molloy et al 2009; Los Volcanes field, Argentina, Germa et al 2010;Sredinny Range, Kamchatka, Ponomareva et al 2007) and only a few near the arc front (e.g., Andahua, Perú, Delacour et al 2007;Sand Mountain, Oregon, Wood and Kienle 1990;Tolbachik, Kamchatka, Braitseva et al 1984). The TMVB is certainly unique in the world by having such large numbers of monogenetic centers not only in the back but also along the front (e.g., Sierra Chichinautzin, Jorullo, Tacámbaro-Puruarán; Fig.…”

Section: Comparison With the Entire Mgvf And Other Monogenetic Volcanmentioning

confidence: 99%

Reconstruction of the volcanic history of the Tacámbaro-Puruarán area (Michoacán, México) reveals high frequency of Holocene monogenetic eruptions

et al. 2012

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The 690 km 2 Tacámbaro-Puruarán area located at the arc-front part of the Michoácan-Guanajuato volcanic field in the Trans-Mexican Volcanic Belt (TMVB) records a protracted history of volcanism that culminated with intense monogenetic activity in the Holocene. Geologic mapping, 40 Ar/ 39 Ar and 14 C radiometric dating, and whole-rock chemical analyses of volcanic products provide insights to that history. Eocene volcanics (55-40 Ma) exposed at uplifted blocks are related to a magmatic arc that preceded the TMVB. Early TMVB products are represented by poorly exposed Pliocene silicic domes (5-2 Ma). Quaternary (<2 Ma) volcanoes (114 mapped) are mainly scoria cones with lavas (49 vol.%), viscous lava flows (22 vol.%), and lava shields (22 vol.%). Erupted products are dominantly either basaltic andesites (37 vol. %), or andesites (17 vol.%), or span across both compositions (28 vol.%). Basalts (9 vol.%), dacites (4 vol.%), shoshonites (2 vol.%), and other alkali-rich rocks (<3 vol.%) occur subordinately. Early-Pleistocene volcanism was bimodal (dacites and basalts) and voluminous while since 1 Ma smallvolume eruptions of intermediate magmas have dominated.Higher rates of lithospheric extension in the Quaternary may have allowed a larger number of small, poorly evolved dikes to reach the surface during this period. Eruptive centers as old as 1.7 Ma are aligned in a NE direction parallel to both, basement faults and the direction of regional compressive stress, implying structural control on volcanic activity. Data suggest that volcanism was strongly pulsatory and fed by localized lowdegree partial melting of mantle sources. In the Holocene, at least 13 eruptions occurred (average recurrence interval of 800 years). These produced~3.8 km 3 of basaltic andesitic to andesitic magma and included four eruptions dated at~1,000; 4,000; 8,000; and 11,000 years BC (calibrated 14 C ages). To date, this is one of the highest monogenetic eruption frequencies detected within such a small area in a subduction-related arc-setting. These anomalous rates of monogenetic activity in an area with thick crust (>30 km) may be related to high rates of magma production at depth and a favorable tectonic setting.

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Volcanic evolution of the back-arc Pleistocene Payun Matru volcanic field (Argentina)

Cited by 69 publications

References 27 publications

Eruptive response of oceanic islands to giant landslides: New insights from the geomorphologic evolution of the Teide–Pico Viejo volcanic complex (Tenerife, Canary)

Eruptive response of oceanic islands to giant landslides: New insights from the geomorphologic evolution of the Teide–Pico Viejo volcanic complex (Tenerife, Canary)

Volcanic stratigraphy and evidence of magma mixing in the Quaternary Payun Matru volcano, andean backarc in western Argentina

Reconstruction of the volcanic history of the Tacámbaro-Puruarán area (Michoacán, México) reveals high frequency of Holocene monogenetic eruptions

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