Does Deccan Volcanic Sequence contain more reversals than the three-Chron N–R–N flow magnetostratigraphy?—a palaeomagnetic evidence from the dyke-swarm near Mumbai

Basavaiah, N.; Satyanarayana, K.; Deenadayalan, K.; Prasad, J.N.

doi:10.1093/gji/ggy041

Cited by 21 publications

(10 citation statements)

References 87 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This was subsequently reaffirmed by recent studies (Jay et al, 2009;Chenet et al, 2009). Paleomagnetic studies of dykes exposed south of Mumbai have recently indicated the record of a 3-Chron N-R-N sequence of polarity (Basavaiah et al, 2018), although they all intrude flows with reverse polarity.…”

Section: Paleomagneticsmentioning

confidence: 61%

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

Section: Paleomagneticsmentioning

confidence: 61%

Emplacement history and evolution of the Deccan Volcanic Province, India

et al. 2020

View full text Add to dashboard Cite

show abstract

“…More recent geochronological studies place the main bulk Deccan Volcanic eruption at *66 Ma (Renne et al 2015;Schoene et al 2015). Although inclusion of fresh palaeomagnetic measurements on the undated dyke swarms near Mumbai, western India, suggest additional reversals (Basavaiah et al 2018), the 30N-29R-29N magnetostratigraphy still remains on the centre stage to the timing and duration of Deccan volcanism. The VGP position for the widely spread alkaline rocks in Rajasthan from the present study completely overlaps with Super Pole position of Deccan Volcanic Province (DVP), which implies that the intrusion of alkaline rocks are coeval with Deccan volcanism.…”

Section: Discussionmentioning

confidence: 99%

“…The extensive Deccan Volcanic Province (DVP) covering a large portion of western and northwestern parts of India is an outstanding example of the outburst of Reunion hotspot (Morgan 1981;Vandamme et al 1991). Combination of palaeomagnetic, geochronology and geochemical data continue to refine our understanding on the role of lithospheric extension, plume-lithosphere interaction, and outburst of plume head, on timing and duration of extensive DVP (Basavaiah et al 2018). On the northwestern fringe of the DVP, number of alkali basalts and alkaline rocks outcrop along two or three volcanic belts (Bose 1980).…”

Section: Introductionmentioning

confidence: 99%

Rock magnetic and palaeomagnetic studies on the alkaline complexes of western Rajasthan, India

Narasimhan

Arora²,

Patil³

2019

J Earth Syst Sci

View full text Add to dashboard Cite

Forty-five oriented block samples were collected from 12 sites of Mundwara and Sarnu-Dandali alkaline complexes of western Rajasthan for palaeomagnetic and rock magnetic investigations to constrain the timing of the emplacement of alkaline suites in relation to the time-frame of main Deccan volcanism. The rock magnetic studies indicated (titano) magnetite as the main magnetic carrier of stable remanence. The Lowrie-Fuller (L-F) test revealed SD and PSD type magnetic carrier in samples. AF and thermal demagnetizations were piloted on the samples to isolate Characteristic Remanent Magnetisation (ChRM) directions. The samples exhibited stable remanence between 5 and 35 mT during AFD. Thermal demagnetizations unblocked remanence between 350°and 500°C. The mean ChRM directions with Decl m = 342, Incl m =-35 (a 95 = 4.39, K = 121, N = 9) corresponds to paleopole position at 42°N and 274°E with a palaeo-latitude of 24.5°S is coincident with the Deccan Super pole position. The comparison of ChRM in alkaline complexes with those documented in DVP implies coeval emplacement of alkaline suites with Deccan eruption. Further, the ChRM marked largely by normal polarity suggests that alkaline intrusions were accomplished within the magnetic Chron C30N, during the onset of Deccan volcanism. The results also indicate that Deccan volcanism extended far beyond the present day boundaries of the traps, especially in the north.

show abstract

“…Nonetheless, this aspect has drawn the attention of the geoscience community across the globe, so as to study the large‐scale and short‐term effects of volcanism on the fossil biota from the Deccan‐associated sedimentary sequences (e.g., K–Pg extinctions, Lilliput effect, and related aspects; Keller, Adatte, et al, ; Keller, Khosla, et al, ; Keller, Sahni, et al, ; Keller et al, ; Keller, Punekar, & Mateo, ; Punekar, Keller, et al, ). In addition, a recent palaeomagnetic study on numerous dykes (cutting across the initial lava flow) within the western part of the DVP suggests the presence of older reversed magnetochrons corresponding to C30R and C31R, implying that the Deccan volcanic activity was initiated close to 71 Ma (Basavaiah, Satyanarayana, Deenadayalan, & Prasad, ). However, as already pointed out by Basavaiah et al (), the above findings require confirmation in a strict geochronological framework.…”

Section: Deccan Volcanic Province (Dvp): Chronological Datamentioning

confidence: 99%

“…In addition, a recent palaeomagnetic study on numerous dykes (cutting across the initial lava flow) within the western part of the DVP suggests the presence of older reversed magnetochrons corresponding to C30R and C31R, implying that the Deccan volcanic activity was initiated close to 71 Ma (Basavaiah, Satyanarayana, Deenadayalan, & Prasad, ). However, as already pointed out by Basavaiah et al (), the above findings require confirmation in a strict geochronological framework.…”

Section: Deccan Volcanic Province (Dvp): Chronological Datamentioning

confidence: 99%

Faunal elements from the Deccan volcano‐sedimentary sequences of India: A reappraisal of biostratigraphic, palaeoecologic, and palaeobiogeographic aspects

Kapur¹,

Khosla

2018

Geological Journal

View full text Add to dashboard Cite

The sedimentary sequences associated with the Deccan Flood Basalts, i.e., infratrappean and intertrappean deposits, are known to yield a diverse assemblage of fauna that includes foraminiferans, ostracods, molluscs, fishes, frogs, turtles, lizards, snakes, crocodiles, dinosaurs, and mammals. The existing literature debates the exact nature of origin, age, and duration of the Deccan volcanic activity; however, there is a general accord within the geosciences community that the Deccan Flood Basalts bestrode the Cretaceous–Palaeogene Boundary. Within the past few decades, the record of the biotic component (particularly faunal elements) reported from the Deccan‐volcano sedimentary sequences have grown both numerically and taxonomically. Constraining the age of the Deccan‐volcano sedimentary sequences has a direct bearing on the studies that discuss the origin, evolution of the biota in a palaeobiogeographic framework, and also in the context of changes in the palaeoenvironment and palaeoecology. Thus, it becomes important to reinforce the age, environment of the Deccan‐volcano sedimentary sequences, and the origin/affinity of the faunal elements recovered from within these sedimentary deposits. We here reappraise the biotic (with an emphasis on the fauna) evidence in a biostratigraphic, palaeoecologic, and palaeobiogeographic aspect.

show abstract

Does Deccan Volcanic Sequence contain more reversals than the three-Chron N–R–N flow magnetostratigraphy?—a palaeomagnetic evidence from the dyke-swarm near Mumbai

Cited by 21 publications

References 87 publications

Emplacement history and evolution of the Deccan Volcanic Province, India

Emplacement history and evolution of the Deccan Volcanic Province, India

Rock magnetic and palaeomagnetic studies on the alkaline complexes of western Rajasthan, India

Faunal elements from the Deccan volcano‐sedimentary sequences of India: A reappraisal of biostratigraphic, palaeoecologic, and palaeobiogeographic aspects

Contact Info

Product

Resources

About