Palaeoenvironmental changes associated with Deccan volcanism, examples from terrestrial deposits from Central India

Fantasia, Alicia; Adatte, Thierry; Spangenberg, Jorge E.; Font, Eric

doi:10.1016/j.palaeo.2015.06.032

Cited by 29 publications

(6 citation statements)

References 53 publications

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“…[] proposed two climofunctions to provide quantitative paleotemperature and precipitation reconstruction for paleosols. Recently, these climofunctions have been successfully applied to lacustrine and marine sediments for quantitative paleoclimatic estimate [ Fantasia et al ., ; Passchier et al ., ]. Herein, we apply the similar method to semiquantitatively estimate mean annual precipitation (MAP) and mean annual temperature (MAT) values in the Fushun Basin, using CIA‐K (CIA‐K = 100*Al 2 O 3 /(Al 2 O 3 + CaO* + Na 2 O)) and S (S = (K 2 O + Na 2 O)/Al 2 O 3 ) indexes.…”

Section: Discussionmentioning

confidence: 98%

Paleoweathering and paleoenvironmental change recorded in lacustrine sediments of the early to middle Eocene in Fushun Basin, Northeast China

Chen

Ding

Tang

et al. 2017

Geochem Geophys Geosyst

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Deciphering the long-term interaction among continental silicate weathering, global climate, and atmospheric CO 2 concentrations is helpful in understanding the mechanisms of the Cenozoic climate change and accessing the future climatic and environmental response to anthropogenic carbon emissions. The Eocene, which is characterized by the Early Eocene Climatic Optimum (EECO) and the following global cooling, represents an ideal test case. Here we generate geochemical data of the Eocene lacustrine sediments from the Fushun Basin, northeast China, to explore the regional climatic response to the global climate change. The chemical index of alteration (CIA) and plagioclase index of alteration (PIA) consistently show a gradual, long-term decrease, indicating a climatic transition from warm and humid to relatively cold and arid during the Eocene in the Fushun Basin. This climatic trend is broadly coincident with the global cooling and decreasing CO 2 concentration, implying that the regional climate is closely correlated with the global climate change over geological time scales. Additionally, the extreme silicate weathering and high lake productivity as reflected by relatively positive d 13 C values of lacustrine organic matter are associated with the EECO. This consistency may demonstrate that enhanced continental weathering and lake productivity had served as effective sinks to lower atmospheric CO 2 across the EECO. Collectively, our new geochemical data add supporting evidence for a long-term, close coupling among continental silicate weathering, climate, and global carbon cycle during the Eocene.

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Section: Discussionmentioning

confidence: 98%

Paleoweathering and paleoenvironmental change recorded in lacustrine sediments of the early to middle Eocene in Fushun Basin, Northeast China

Chen

Ding

Tang

et al. 2017

Geochem Geophys Geosyst

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“…Four out of the five fern are found to have comparatively Smith et al, 2007) Keller et al (2008) as 'mock aridity', or a volcanisminduced arid condition in the adjacent region. Terrestrial sections from Central India also bear evidence of frequent acid rains, higher microbial activity, increased weathering and a dominantly arid climate with intermittent humid spells during the eruptive hiatuses (Fantasia et al, 2016;Font et al, 2016;Prasad and Sahni, 2014), overall suggesting stressed environmental conditions within the Indian subcontinent well before the boundary. Instances of local extinctions during the Late Maastrichtian have been reported from China (Zhang et al, 2018) and Seymour Island in Antarctica (Mohr et al, 2020); however, no cascading effect on carbon isotopic composition and species diversity has been observed in other marine deposits during this period (Figure 9; Hull et al, 2020).…”

Section: Pco 2 Changes Across the Depositional Intervalmentioning

confidence: 99%

“…However, despite the several palynological and paleontological studies from trappean beds suggesting major biotic turnovers in the marine and terrestrial realms (Keller et al, 2008(Keller et al, , 2012Samant & Mohabey, 2014), assessment of the environmental response to Deccan Traps has remained mostly qualitative, fragmentary and spatially disconnected. The limited set of carbon isotope (δ 13 C) values from the volcanic province, which came either from the terrestrial or marine environments, was found to contain prominent signatures of alteration from local processes (Fantasia et al, 2016;Gertsch et al, 2011). Integration of multiple organic and inorganic proxies is often necessary to understand the complex underlying mechanisms responsible for changes in the carbon reservoir, as a range of biological and environmental factors can influence terrestrial and marine isotope records (e.g.…”

Section: Introductionmentioning

confidence: 99%

Carbon reservoir perturbations induced by Deccan volcanism: Stable isotope and biomolecular perspectives from shallow marine environment in Eastern India

2021

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The Deccan Traps in Western India is hypothesized to have caused significant fluctuations in climatic condition and organic matter (OM) productivity across the Cretaceous-Paleogene Boundary (K/PgB). The periodic release of large amounts of volatiles into the atmosphere is thought to drive these changes. Yet, direct impact of volcanism on the carbon cycle and ecosystem remains relatively unconstrained.For the first time, we attempt to trace changes in both marine and terrestrial carbon reservoirs from pre-and intervolcanic sedimentary units (infra-and inter-trappeans respectively) from Rajahmundry, ~1500 km SE of main eruption sites in Western India.Molecular level characterization of OM and stable isotope composition of carbonates (δ 13 C carb ), bulk OM (δ 13 C org ), and n-alkane (δ 13 C alk and δD alk ) have been analysed to provide a chemo-stratigraphic framework. In Rajahmundry, high CO 2 concentration estimated from infra-trappean carbonate nodule is synchronous with the onset of the Deccan Traps and the Late Maastrichtian warming episode. Impact of the warming event is reflected in Rajahmundry from a major shift in the terrestrial ecosystem.Marine OM production also seems to have been low throughout the infra-trappean. A steady decrease in δ 13 C carb values, increase in mortality rates and dwarfism in invertebrates immediately below the first volcanic units in Rajahmundry suggest stressed conditions from eruption in the western part of India ~40-60 kyrs prior to K/PgB. A significant increase in heterotrophic activity is observed after the volcanic deposits in Rajahmundry that seems to have controlled the marine carbon reservoir for a maximum of ~200 kyrs after the boundary. Advent of pteridophytes, increase in carbon content and positive shifts in δ 13 C carb and δ 13 C alk values in the upper inter-trappean units mark the onset of recovery in terrestrial and marine environments. Overall, our results suggest significant perturbations in the carbon reservoir as a consequence of the Deccan eruption.

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“…Pande (), while providing a detailed review of the published 40 Ar/ 39 Ar chronologies for the Deccan basalts, proposed that the volcanic activity was episodic and possibly continued from 69 Ma to 63 Ma, i.e., transcending the K–PgB. A series of papers by Keller and colleagues and several other workers (Fantasia, Adatte, Spangenberg, & Font, ; Font et al, ; Keller, Adatte, et al, ; Keller, Khosla, et al, ; Keller et al, ; Keller, Sahni, & Bajpai, ; Punekar, Mateo, & Keller, ) have shown that the Deccan volcanic activity continued, although episodically (in 3 phases), for more than about five million years.…”

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

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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.

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Palaeoenvironmental changes associated with Deccan volcanism, examples from terrestrial deposits from Central India

Cited by 29 publications

References 53 publications

Paleoweathering and paleoenvironmental change recorded in lacustrine sediments of the early to middle Eocene in Fushun Basin, Northeast China

Paleoweathering and paleoenvironmental change recorded in lacustrine sediments of the early to middle Eocene in Fushun Basin, Northeast China

Carbon reservoir perturbations induced by Deccan volcanism: Stable isotope and biomolecular perspectives from shallow marine environment in Eastern India

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

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