Are flood basalt eruptions monogenetic or polygenetic?

Sheth, Hetu; Cañón‐Tapia, Edgardo

doi:10.1007/s00531-014-1048-z

Cited by 25 publications

(13 citation statements)

References 74 publications

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“…in the Arabian Peninsula (Murcia et al 2014). This problem was highlighted by recent research on determining the source volcanoes of typical large flood basalt regions, such as those in the Deccan (Sheth and Cañón-Tapia 2015).…”

Section: Departures From Monogenetic Signatures: Transitional Volcanoesmentioning

confidence: 97%

Monogenetic volcanism: personal views and discussion

Németh

Keresztúri

2015

Int J Earth Sci (Geol Rundsch)

227

130

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Section: Departures From Monogenetic Signatures: Transitional Volcanoesmentioning

confidence: 97%

Monogenetic volcanism: personal views and discussion

Németh

Keresztúri

2015

Int J Earth Sci (Geol Rundsch)

227

130

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“…Flood basalt volcanism is a component of many LIPs and these mafic eruptions represent the largest on Earth (Bryan and Ferrari, 2013). Typically, most flood basalt eruptions occur from numerous polygenetic and monogenetic vents, leading to extensive and voluminous packages of mafic lavas (Walker, 1993;Sheth and Cañón-Tapia, 2014), as well as interspersed rhyolites, minor intermediate lavas, and sedimentary strata. Interpreting the SOA as a large igneous province (LIP) is more consistent with the volume of extrusive lavas mapped on the surface and inferred to exist in the subsurface based on geophysical studies (Keller and Stephenson, 2007;Hanson et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Cambrian intermediate-mafic magmatism along the Laurentian margin: Evidence for flood basalt volcanism from well cuttings in the Southern Oklahoma Aulacogen (U.S.A.)

Brueseke

Hobbs

Bulen

et al. 2016

Lithos

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The Southern Oklahoma Aulocogen (SOA) stretches from southern Oklahoma through the Texas panhandle and into Colorado and New Mexico, and contains mafic through silicic magmatism related to the opening of the Iapetus Ocean during the early Cambrian.Cambrian magmatic products are best exposed in the Wichita Mountains (Oklahoma), where they have been extensively studied. However, their ultimate derivation is still somewhat contentious and centers on two very different models: SOA magmatism has been suggested to occur via [1] continental rifting (with or without mantle plume emplacement) or [2] transform-fault related magmatism (e.g., leaky strike-slip faults). Within the SOA, the subsurface in and adjacent to the Arbuckle Mountains in southern Oklahoma contains thick sequences of mafic to intermediate lavas, intrusive bodies, and phreatomagmatic deposits interlayered with thick, extensive rhyolite lavas, thin localized tuffs, and lesser silicic intrusive bodies. These materials were first described in the Arbuckle Mountains region by a 1982 drill test (Hamilton Brothers Turner Falls well) and the best available age constraints from SOA Arbuckle Mountains eruptive products are ~535 to 540 Ma. Well cuttings of the mafic through intermediate units were collected from that well and six others and samples from all but the Turner Falls and Morton wellsare the focus of this study. Samples analyzed from the wells are dominantly subalkaline, tholeiitic, and range from basalt to andesite. Their overall bulk major and trace element chemistry, normative mineralogy, and Sr-Nd isotope ratios are similar to magmas erupted/emplaced in flood basalt provinces. When compared with intrusive mafic rocks that crop out in the Wichita Mountains, the SOA well cuttings are geochemically most similar to the Roosevelt Gabbros. New geochemical and isotope data presented in this study, when coupled with recent geophysical work in the SOA and the coeval relationship with rhyolites, indicates that the ~250,000 km 3 of early Cambrian mafic to silicic igneous rocks in the SOA were emplaced in a rifting event. This event is suggested to result from the break-up of Pannotia and the formation of the failed arm of a three-armed radial rift system.

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“…The importance of the dykes as potential feeders for the lava flows has been discussed by various authors (Blanford, 1867;Auden, 1949;Peshwa et al, 1987;Deshmukh and Sehgal, 1988). The dyke-fed fissure eruption model has however suffered from the absence of any known unambiguous exposure where the feeder relationship is visible (see: Sheth, 2000;Vanderkluysen et al, 2011;Sheth and Cañón-Tapia, 2015). Fig.…”

Section: The Section Line Is N-s Note They Assume a Gently Northwamentioning

confidence: 99%

Emplacement history and evolution of the Deccan Volcanic Province, India

et al. 2020

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A review of the existing knowledge on the Deccan Volcanic Province of India shows that it has a significant geographic bias towards the western parts, while the rest of the province is not as well constrained. Emerging data on its structure, geochronology and volcanology in the last decade suggests that many existing concepts and models of this large Continental Flood Basalt Province are open to revisions or replacement. The explicit relation between the Deccan volcanism and the Reunion hotspot makes it a unique laboratory for studying magmatic evolution over active hotspots, its upward trajectory through a thick continental crust and the mode and mechanics of eruption and spread of large volumes of lava on continental settings. The temporal relation of the Deccan volcanism with the terminal Cretaceous biotic upheaval has direct bearings on understanding environmental crisis that result from such eruptive events. The impact of this basaltic substrate on the anthropogenic activity of more than 100 million people living on it needs no explanation. A multifaceted and interdisciplinary study with an aim of closing the gaps in its knowledge will facilitate a well-constrained understanding of the characters and robust models of this province in the years to come.

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Are flood basalt eruptions monogenetic or polygenetic?

Cited by 25 publications

References 74 publications

Monogenetic volcanism: personal views and discussion

Monogenetic volcanism: personal views and discussion

Cambrian intermediate-mafic magmatism along the Laurentian margin: Evidence for flood basalt volcanism from well cuttings in the Southern Oklahoma Aulacogen (U.S.A.)

Emplacement history and evolution of the Deccan Volcanic Province, India

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