Geology and geochemistry of Pachmarhi dykes and sills, Satpura Gondwana Basin, central India: problems of dyke-sill-flow correlations in the Deccan Traps

Sheth, Hetu; Ray, Jyotisankar; Ray, R. Randy; Vanderkluysen, L.; Mahoney, John J.; Kumar, Alok; Shukla, A. D.; Das, Partha Pratim; Adhikari, Subhrashis; Jana, Bikashkali

doi:10.1007/s00410-009-0387-4

Cited by 56 publications

(35 citation statements)

References 55 publications

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“…a Chilled margin of dyke against Mesozoic sandstone. This is dyke PMD11 near Pachmarhi (Sheth et al 2009). note the large columns.…”

Section: Dykes and Sills Feeders And Non-feedersmentioning

confidence: 93%

“…like dykes, sills can be simple, multiple, or composite. The Mahad tholeiitic sill in the southwestern Deccan Traps is a single ~22-m-thick saucer-shaped intrusion (Duraiswami and Shaikh 2013), whereas the 200-meter-thick Chakhla-Delakhari tholeiitic sill near Pachmarhi, in the northeastern Deccan Traps, is a multiple intrusion and is known to have fed a local lava flow (Crookshank 1936;Sen 1980;Sheth et al 2009). Gudmundsson (2012) has illustrated multiple sills in Iceland, and Fig.…”

Section: Dykes and Sills Feeders And Non-feedersmentioning

confidence: 98%

“…There has been considerable recent interest in mafic dyke swarms and their correlations to the lava flows in the Deccan Traps (e.g., Bhattacharji et al 1996;Bondre et al 2006;Ray et al 2007;Sheth et al 2009;Vanderkluysen et al 2009). Of hundreds of tholeiitic dykes, we have observed over a large area of the Deccan Traps, many are clearly single-injection dykes.…”

Section: Dykes In the Deccan Trapsmentioning

confidence: 99%

See 2 more Smart Citations

Are flood basalt eruptions monogenetic or polygenetic?

Sheth

Cañón‐Tapia

2014

Int J Earth Sci (Geol Rundsch)

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“…a Chilled margin of dyke against Mesozoic sandstone. This is dyke PMD11 near Pachmarhi (Sheth et al 2009). note the large columns.…”

Section: Dykes and Sills Feeders And Non-feedersmentioning

confidence: 93%

Section: Dykes and Sills Feeders And Non-feedersmentioning

confidence: 98%

Section: Dykes In the Deccan Trapsmentioning

confidence: 99%

See 1 more Smart Citation

Are flood basalt eruptions monogenetic or polygenetic?

Sheth

Cañón‐Tapia

2014

Int J Earth Sci (Geol Rundsch)

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“…Tuya formation would have required the invasive flows to advance along tens or perhaps even hundreds of kilometers. Although not without controversy, it has been proposed that those distances could have been viable in some terrestrial invasive lava flows and sills (Byerly and Swanson, 1978;Beeson et al, 1979;Rawlings et al, 1999;Liss et al, 2004;Sheth et al, 2009). However, the pressure required for an invasive volcanic flow to extrude through a layer of ice sufficiently thick to host a tuya ($100 m) greatly exceeds current models and observations of flow.…”

Section: Geological Historymentioning

confidence: 99%

Evidence of volcanic and glacial activity in Chryse and Acidalia Planitiae, Mars

Martínez-Alonso

Mellon

Banks

et al. 2011

Icarus

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“…Many of the central and northern Kachchh mafic alkalic intrusions represent magmas emplaced within the Jurassic sedimentary rocks at a shallow depth, their emplacement favoured by the host rocks' layering and discontinuities (bedding planes, joints, faults) as discussed by Gudmundsson and Loetveit (2005). There are parallels with the Satpura Gondwana Basin of central India, where many Deccan tholeiitic sills and dikes intrude a thick sequence of Mesozoic Gondwana sandstone (Sheth et al 2009b). …”

Section: The Central Kachchh Plugs As Subvolcanic Intrusionsmentioning

confidence: 94%

Mafic alkalic magmatism in central Kachchh, India: a monogenetic volcanic field in the northwestern Deccan Traps

2010

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Magmatism in Kachchh, in the northwestern Deccan continental flood basalt province, is represented not only by typical tholeiitic flows and dikes, but also plug-like bodies, in Mesozoic sandstone, of alkali basalt, basanite, melanephelinite and nephelinite, containing mantle nodules. They form the base of the local Deccan stratigraphy and their volcanological context was poorly understood. Based on new and published field, petrographic and geochemical data, we identify this suite as an eroded monogenetic volcanic field. The plugs are shallow-level intrusions (necks, sills, dikes, sheets, laccoliths); one of them is known to have fed a lava flow. We have found local peperites reflecting mingling between magmas and soft sediment, and the remains of a pyroclastic vent composed of non-bedded lapilli tuff breccia, injected by mafic alkalic dikes. The lapilli tuff matrix contains basaltic fragments, glass shards, and detrital quartz and microcline, with secondary zeolites, and there are abundant lithic blocks of mafic alkalic rocks. We interpret this deposit as a maar-diatreme, formed due to phreatomagmatic explosions and associated wall rock fragmentation and collapse. This is one of few known hydrovolcanic vents in the Deccan Traps. The central Kachchh monogenetic volcanic field has >30 individual structures exposed over an area of ∼1,800 km 2 and possibly many more if compositionally identical igneous intrusions in northern Kachchh are proven by future dating work to be contemporaneous. The central Kachchh monogenetic volcanic field implies low-degree mantle melting and limited, periodic magma supply. Regional directed extension was absent or at best insignificant during its formation, in contrast to the contemporaneous significant directed extension and vigorous mantle melting under the main area of the Deccan flood basalts. The central Kachchh field demonstrates regional-scale volcanological, compositional, and tectonic variability within flood basalt provinces, and adds the Deccan Traps to the list of such provinces containing monogenetic-and/or hydrovolcanism, namely the Karoo-Ferrar and Emeishan flood basalts, and plateau basalts in Saudi Arabia, Libya, and Patagonia.

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Geology and geochemistry of Pachmarhi dykes and sills, Satpura Gondwana Basin, central India: problems of dyke-sill-flow correlations in the Deccan Traps

Cited by 56 publications

References 55 publications

Are flood basalt eruptions monogenetic or polygenetic?

Are flood basalt eruptions monogenetic or polygenetic?

Evidence of volcanic and glacial activity in Chryse and Acidalia Planitiae, Mars

Mafic alkalic magmatism in central Kachchh, India: a monogenetic volcanic field in the northwestern Deccan Traps

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