Glauconite authigenesis during the warm climatic events of Paleogene: Case studies from shallow marine sections of Western India

Choudhury, Tathagata Roy; Khanolkar, Sonal; Banerjee, Santanu

doi:10.1016/j.gloplacha.2022.103857

Cited by 9 publications

(3 citation statements)

References 55 publications

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“…The Basal Member containing glauconitic shale and nummulitic grainstone indicates a shallow marine transgressive environment (Banerjee et al, 2012). More importantly, the formation of glauconitic shale is attributed to late Oligocene warming period (Choudhury et al, 2022), which agrees well with our Sr‐isotope ages. Furthermore, the present numerical deposition ages also show that both Coral Limestone and Bermoti members correspond to the range of late Oligocene warming, which likely contributed to conditions suitable for the development of a diverse coral community (Zachos et al, 1997, 2001).…”

Section: Discussionsupporting

confidence: 91%

“…The results show a relatively low sedimentation rate of 0.04 ± 0.01 cm/kyr during the Oligocene (Maniyara Fort Formation) and in contrast, the Miocene sections (Chhasra and Khari Nadi formations) show higher sedimentation rates of 0.12 ± 0.04 and 0.23 ± 0.04 cm/kyr, respectively (Figure 11). The glauconitic shale in the Maniyara Fort Formation also confirms a low sedimentation rate in response to rapid marine transgression (Choudhury et al, 2022). On the other hand, the increase in sedimentation during Early Miocene of the Kutch Basin is in agreement with the sediment budgets derived from seismic stratigraphy data from the Indus Fan which shows rapid erosion during the early–late Miocene (24–11 Ma) in response to Himalayan uplift and precipitation changes largely related to monsoon strengthening (Figure 11) (Clift, 2006, 2010, 2017).…”

Section: Discussionmentioning

confidence: 83%

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Strontium isotope stratigraphy of marine Oligocene–Miocene sedimentary successions of Kutch Basin, western India

Singh,

Vadlamani,

Bajpai

et al. 2024

Geological Journal

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The Kutch Basin of western India exposes one of the most complete, fossiliferous marine Cenozoic sedimentary sequences of India. Precise depositional ages of these sequences are of great importance in the reconstruction of palaeoclimatic and palaeobiogeographic histories of the basin. Due to the poorly constrained foraminiferal biostratigraphic ages, we conducted high‐resolution 87Sr/86Sr chronology of the various fossiliferous, stratigraphically continuous units of Oligocene–Miocene strata in Kutch Basin. Besides updating the previously determined 87Sr/86Sr chronology, we report new numerical depositional ages for Oligocene–Miocene formations and members, and correlated these ages to the existing biostratigraphic schemes. The new 87Sr/86Sr data indicates a depositional age range between 28.64 + 0.29/‐1.11 and 23.51 + 1.53/‐1.85 Ma (Rupelian‐Chattian) for the Maniyara Fort Formation, between 23.07 + 0.94/1.39 and 18.09 + 0.24/‐0.57 Ma (Chattian‐Burdigalian) for the Khari Nadi Formation, and between 15.11 + 0.56/‐2.87 and 12.29 + 1.22/‐1.9 Ma (Langhian‐Serravallian) for the Chhasra Formation. The sedimentation rate, determined through numerical ages derived from 87Sr/86Sr, indicates an increase in sedimentation for the Khari Nadi (0.23 ± 0.04 cm/kyr) and Chhasra (0.12 ± 0.04 cm/kyr) formations, likely related to uplift of the Himalaya‐Tibetan plateau and intensification of the Indian Summer Monsoon. The bulk sediment element ratios (V/Ni, Ni/Co and V/Cr) indicate oxic to suboxic palaeo‐redox conditions during deposition of the Oligocene–Miocene successions of the basin. Based on new and updated 87Sr/86Sr chronology, the depositional environments and sedimentation rates of the Kutch sequence are correlated with changes in sea‐level, sedimentation rates in the Arabian Sea and Bay of Bengal, and the global climate changes across the Oligocene–Miocene boundary.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 83%

Strontium isotope stratigraphy of marine Oligocene–Miocene sedimentary successions of Kutch Basin, western India

Singh,

Vadlamani,

Bajpai

et al. 2024

Geological Journal

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“…The glauconite in the N1m sandstones mainly occurs as spherical glauconite (Figure 6D). Authigenic glauconite is slowly fused by discrete tiny patches in the early stage to form a symbiotic glauconite particle with a skeleton particle [34,35]. Glauconite is usually transported by water after in situ precipitation, and is reworked with detrital grains under mechanical depositional differentiation [36,37].…”

Section: Eogenesismentioning

confidence: 99%

Diagenetic Impact on High-Pressure High-Temperature Reservoirs in Deep-Water Submarine Fan Sandstone of Qiongdongnan Basin, South China Sea

Hu,

Luo,

2024

Minerals

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The diagenetic evolution of sandstone is very complicated under the conditions of high temperatures and pressures in deep-water, deep-buried regimes, which have great influence on reservoir quality. This study investigates the typical reservoir target of Neogene deep-water, submarine-fan sandstones under high-temperature, high-pressure regimes in the Qiongdongnan Basin, South China Sea. Utilizing a thin section, scanning electron microscope (SEM), mineral geochemistry combined with burial history evolution, complex diagenetic events, and main controlling factors of the sandstone in the Neogene Meishan Formation were determined. The results show that the evolution of sandstone reservoirs is initially controlled by depositional framework compositions and subsequently modified by eogenetic and mesogenetic alterations during progressive burial. Eogenetic alterations mainly include the following: (1) mechanical compaction; (2) dissolution of feldspar; (3) low-Fe calcite cementation. Mesogenetic events were identified as the following: (1) dissolution of feldspar; (2) ferroan calcite and ankerite formation; (3) precipitation of quartz and clay mineral. Mechanical compaction is greatly influenced by the original depositional framework composition, and sandstone samples enriched in high contents of detrital clay matrix always experienced extensive mechanical compaction. Different phases of carbonate cement during different diagenetic regimes lead to continuous destruction on reservoir porosity. The dissolution of unstable feldspar minerals during eogenetic and mesogenetic environments leads to the development of secondary porosities and would enhance the quality of the reservoir. Overpressure formation is pervasively developed owing to early disequilibrium compaction and subsequent natural gas charging. Only well-sorted sandstones with low contents of detrital clay matrix could resist early mechanical compaction, lead to ample residual original porosities, and then undergo extensive mineral dissolution to generate sufficient secondary porosities. Subsequently, these porosities would be effectively protected by overpressure formation. Poor-sorted sandstones with high contents of detrital clay matrix would experience strong mechanical compaction and extensive destruction of original porosities. Thus, these sandstones are difficult to have significant dissolution and are unable to be effectively protected by overpressure formation. Therefore, the interplay between the original framework composition and the corresponding diagenetic pathways coupled with overpressure formation would result in strong reservoir heterogeneity for the deep-buried sandstones during progressive burial.

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Geochemical and depositional environment of an Upper Cretaceous greensand giant (Münsterland Cretaceous Basin, Germany)

Wilmsen,

Bansal,

Metzner

et al. 2024

Chemical Geology

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Glauconite authigenesis during the warm climatic events of Paleogene: Case studies from shallow marine sections of Western India

Cited by 9 publications

References 55 publications

Strontium isotope stratigraphy of marine Oligocene–Miocene sedimentary successions of Kutch Basin, western India

Strontium isotope stratigraphy of marine Oligocene–Miocene sedimentary successions of Kutch Basin, western India

Diagenetic Impact on High-Pressure High-Temperature Reservoirs in Deep-Water Submarine Fan Sandstone of Qiongdongnan Basin, South China Sea

Geochemical and depositional environment of an Upper Cretaceous greensand giant (Münsterland Cretaceous Basin, Germany)

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