Holocene volcanism in central Mongolia and Northeast China: Asynchronous decompressional and fluid melting of the mantle

Chuvashova, Irina; Rasskazov, S. V.; Yasnygina, T. A.; Saranina, Elena; Фефелов, Н. Н.

doi:10.1134/s0742046307060024

Cited by 25 publications

(15 citation statements)

References 31 publications

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“…Farther north, in Central Mongolia, an area of Holocene volcanism situated in the Taryat Basin was triggered by left-lateral, strike-slip displacements on an E-W magma-tapping fault (Chuvashova et al, 2007).…”

Section: Intra-plate Settingmentioning

confidence: 99%

Volcanism in Reverse and Strike-Slip Fault Settings

Tibaldi

Pasquarè

Tormey³

2009

New Frontiers in Integrated Solid Earth Sciences

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Traditionally volcanism is thought to require an extensional state of stress in the crust. This review examines recent relevant data demonstrating that volcanism occurs also in compressional tectonic settings associated with reverse and strike-slip faulting. Data describing the tectonic settings, structural analysis, analogue modelling, petrology, and geochemistry, are integrated to provide a comprehensive presentation of this topic. An increasing amount of field data describes stratovolcanoes in areas of coeval reverse faulting, and shield volcanoes, stratovolcanoes, and monogenic edifices along strike-slip faults, whereas calderas are mostly associated with pull-apart structures in transcurrent regimes. Physically-scaled analogue experiments simulate the propagation of magma in these settings, and taken together with data from subvolcanic magma bodies, they provide insight into the magma paths followed from the crust to the surface. In several transcurrent tectonic plate boundary regions, volcanoes are aligned along both the strikeslip faults and along fractures normal to the local least principal stress (σ 3 ). At subduction zones, intraarc tectonics is frequently characterised by contraction or transpression. In intra-plate tectonic settings, volcanism can develop in conjunction with reverse faults or strike slip faults. In most of these cases, magma appears to reach the surface along fractures striking parallel to the local σ 1 . In some cases, there is a direct geometric control by the substrate strikeslip or reverse fault: magma is transported beneath A. Tibaldi ( ) Department of Geological Sciences and Geotechnologies, University of Milan-Bicocca, Italy e-mail: alessandro.tibaldi@unimib.it the volcano to the surface along the main faults, irrespective of the orientation of σ 3 . The petrology and geochemistry of lavas erupted in compressive stress regimes indicate longer crustal residence times, and higher degrees of lower crustal and upper crustal melts contributing to the evolving magmas when compared to lavas from extensional stress regimes. Small volumes of magma tend to rise to shallow crustal levels, and magma mixing is common in the compressional regimes. In detailed studies from the Andes and Anatolia, with geographic and temporal coverage with which to compare compressional, transcurrent and extensional episodes in the same location, there do not appear to be changes to the mantle or crustal source materials that constitute the magmas. Rather, as the stress regime becomes more compressional, the magma transport pathways become more diffuse, and the crustal residence time and crustal interaction increases.

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Section: Intra-plate Settingmentioning

confidence: 99%

Volcanism in Reverse and Strike-Slip Fault Settings

Tibaldi

Pasquarè

Tormey³

2009

New Frontiers in Integrated Solid Earth Sciences

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“…With proximity to the Baikal rift, tectonic forces have significantly shaped the landscape. Active volcanism is well documented in Central and Northern Mongolia with basaltic vents and flows occurring between 30 million to circa 8,000 years ago (Barry et al 2003;Chuvashova et al 2007;Harris et al, 2010).…”

Section: Geographical Settingmentioning

confidence: 99%

The open-air site of Tolbor 16 (Northern Mongolia): Preliminary results and perspectives

Zwyns

Gladyshev

Gunchinsuren

et al. 2014

Quaternary International

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“…Cały wulkan pokryty jest obecnie scorią bazaltową (Fig. 24) i bombami wulkanicznymi o składzie bazaltowych trachyandezytów (wyróżniających się stosunkowo dużą zawartością alkaliów, Chuvashova i in. 2007).…”

Section: W Drodze Do Parku Narodowego Khorgounclassified

“…The cone is recently covered with basaltic scoria (Fig. 24) and volcanic bombs of composition corresponding to basaltic trachyandesites (Chuvashova et al 2007). The Khorgo crater is now about 180 m across and 70 -80 m deep.…”

Section: Heading Southmentioning

confidence: 99%

Selected geotourist attractions of Central and Southern Mongolia

Machowiak¹

2009

geotour

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Holocene volcanism in central Mongolia and Northeast China: Asynchronous decompressional and fluid melting of the mantle

Cited by 25 publications

References 31 publications

Volcanism in Reverse and Strike-Slip Fault Settings

Volcanism in Reverse and Strike-Slip Fault Settings

The open-air site of Tolbor 16 (Northern Mongolia): Preliminary results and perspectives

Selected geotourist attractions of Central and Southern Mongolia

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