Post-K/PB younger 40Ar–39Ar ages of the Mandla lavas: Implications for the duration of the Deccan volcanism

Shrivastava, J. P.; Duncan, Robert A.; Kashyap, Mamta

doi:10.1016/j.lithos.2015.03.006

Cited by 63 publications

(39 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Rajahmundry traps are considered to be synchronous with the Deccan magmatism as inferred from 40 Ar/ 39 Ar ages on plagioclase (Knight, Renne, Halkett, & White, ), which are consistent with those in the Western Ghat formations. Shrivastava, Duncan, and Kashyap () reported the 40 Ar/ 39 Ar age of 64.42 ± 0.33 Ma for the Mandla lobe, which is located in the eastern margin of the DLIP and they correlated it with the upper units of the Western Ghat section. Shrivastava, Kumar, and Rani (2016) reported 40 Ar/ 39 Ar plagioclase crystallization ages of 66.56 ± 0.42 Ma for the dykes at Satpura Range and correlated these with the Mandla lobe flows.…”

Section: Salient Characteristics Of Deccan Volcanismmentioning

confidence: 97%

Tholeiitic basalts of Deccan large igneous province, India: An overview

2019

View full text Add to dashboard Cite

The Deccan large igneous province (DLIP) of Peninsular India is predominantly composed of tholeiitic basalts with a minor amount of alkaline, carbonatite, and silicic rocks. The tholeiitic basalts of DLIP are enriched in incompatible trace elements and divisible into low‐Ti basalts (TiO2 < 2.5; Ti/Y < 500) and high‐Ti basalts (TiO2 > 2.5; Ti/Y > 500). Despite variable total REE content, both low‐Ti and high‐Ti basalts exhibit almost similar geochemical patterns in the chondrite‐ and primitive‐ mantle‐normalized diagrams. The mantle potential temperature (Tp) of high‐Ti tholeiites estimated at Ca.1368°C, which is consistent with an ambient mantle temperature (1300–1400°C) whereas the Tp of low‐Ti tholeiites is around 1553°C, which indicates its derivation from the mantle plume axis. Extensive assimilation of the crustal components into the ascending plume have masked the nature and compositional characteristics of both high‐ and low‐Ti basalts. The low‐Ti basalts indicate significant contamination with crustal components than the high‐Ti basalts. The geochemical and isotopic compositions indicate the involvement of multiple mantle components. In general, the differentiated tholeiites of DLIP are the products of plume and depleted sections of the mantle with or without contributions from the continental crust. The main phase of Deccan magmatism intensely affected the atmosphere and hydrosphere, which was a possible trigger for the mass extinction event at the K–Pg boundary.

show abstract

Section: Salient Characteristics Of Deccan Volcanismmentioning

confidence: 97%

Tholeiitic basalts of Deccan large igneous province, India: An overview

2019

View full text Add to dashboard Cite

show abstract

“…They recognized a normal -reverse -normal (N-R-N) sequence in the Mandla sequence. Shrivastava et al (2015) recorded 5 normal polarity flows interbedded within flows with reverse or mixed polarity from a continuous sequence of 37 flows in the Mandla lobe.…”

Section: Paleomagneticsmentioning

confidence: 99%

“…40 Ar-39 Ar ages reported from different laboratories are not directly comparable because of the different ages of these monitor samples that have been used by them for calibration and computations. To enable this, we have recalculated and normalized to the Fish Canyon Sanidine (FCs) age of 28.294 ± 0.036 Ma (Renne et al, 2010(Renne et al, , 2011 all previously published 40 Ar-39 Ar plateau ages (Duncan and Pyle, 1988;Venkatesan et al, 1993;Hofmann et al, 2000;Pande et al, 2004Pande et al, , 2017Baksi, 2014;Schöbel et al, 2014;Renne et al, 2015;Shrivastava et al, 2015;Parisio et al, 2016). The recalculated high quality 40 Ar-39 Ar plateau ages (both whole rock and plagioclase) for seven districts based on the District Resources Map (DRM) series data (GSI, 2001) are plotted in the Fig 4 along with the available paleomagnetic information of the sequence.…”

Section: Figure 4 Locations Of Fossiliferous Sediment Associated Witmentioning

confidence: 99%

Emplacement history and evolution of the Deccan Volcanic Province, India

et al. 2020

View full text Add to dashboard Cite

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.

show abstract

“…The Deccan Traps were formed as a result of outpouring of lava associated with the movement of the Indian Plate over the R eunion hotspot (Chatterjee et al, 2013), a major K-Pg boundary event. Dating (Renne et al, 2015;Schoene et al, 2015;Shrivastava et al, 2015) and magnetostratigraphic studies (Chenet et al, 2009) indicate that volcanism occurred from 67.5 AE 1 to 63 Ma with the bulk of the eruptions close to the K-Pg boundary (ca. 65 AE 1 Ma).…”

Section: Introductionmentioning

confidence: 99%

More Malpighiales: Woods of Achariaceae and/or Salicaceae from the Deccan Intertrappean beds, India

Srivastava¹,

Miller²,

Baas

2018

J of Sytematics Evolution

View full text Add to dashboard Cite

The families Achariaceae and Salicaceae (Malpighiales) are characterized by wood anatomical ranges that partly overlap. Formerly these families were treated together in the polyphyletic Flacourtiaceae and a much more narrowly circumscribed Salicaceae. Here we attribute two recently collected fossil woods from the Deccan Intertrappean Beds to the clade that contain these two families, i.e., the Parietal Clade of the Malpighiales. The new genus Elioxylon shares features with several extant genera of Achariaceae and Salicaceae, but does not completely match with any of them. A new record of Hydnocarpoxylon indicum Bande & Khatri is a good match for extant Hydnocarpus Gaertn. (Achariaceae). Elioxylon and Hydnocarpoxylon share an absence of parenchyma, the presence of septate fibres and 1–3 seriate heterocellular rays with long uniseriate margins consistent with Achariaceae and Salicaceae. Elioxylon has mixed simple and scalariform perforations, whereas Hydnocarpxylon has exclusively scalariform perforations. Other Deccan fossils formerly attributed to “Flacourtiaceae” in the literature are critically discussed and mostly excluded from Achariaceae and Salicaceae. Elioxylon and Hydnocarpoxylon from the Maastrichtian ‐ Danian of India are the oldest fossil records of the Parietal Clade of the Malpighiales. With their occurrence on the Indian plate during its northward journey from Gondwana to Laurasia, these fossils provide further support for an ‘out‐of‐India’ hypothesis for Achariaceae and/or Salicaceae. “Baileyan trends” in vessel perforation plate and vessel grouping evolution are apparent in the phylogeny of the Parietal Clade.

show abstract

Post-K/PB younger 40Ar–39Ar ages of the Mandla lavas: Implications for the duration of the Deccan volcanism

Cited by 63 publications

References 61 publications

Tholeiitic basalts of Deccan large igneous province, India: An overview

Tholeiitic basalts of Deccan large igneous province, India: An overview

Emplacement history and evolution of the Deccan Volcanic Province, India

More Malpighiales: Woods of Achariaceae and/or Salicaceae from the Deccan Intertrappean beds, India

Contact Info

Product

Resources

About