Rock magnetic evidence of tectonic control on the sedimentation and diagenesis in the Andaman Sea over ~1 million years

Badesab, Firoz; Mascarenhas-Periera, M.B.L.; Gaikwad, Virsen; Dewangan, P.; Panda, P.P.; Deenadayalan, K.; Salunke, Kiran; Augastian, B.; Patil, J.R.; Lakshmi, B. V.

doi:10.1016/j.marpetgeo.2021.105150

Cited by 7 publications

(4 citation statements)

References 139 publications

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“…All data obtained in this study are available and can be downloaded in free access at the CSIR-NIO repository (Badesab et al, 2023). We thank the Director, CSIR-NIO for supporting this study.…”

Section: Conflict Of Interestmentioning

confidence: 99%

Control of Source‐To‐Sink Processes on the Dispersal, Fractionation, and Deposition of Magnetic Minerals in a Tropical Mesotidal Estuarine System

Badesab,

Kadam,

Gullapalli

et al. 2023

Geochem Geophys Geosyst

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This study aims to elucidate the control of source‐to‐sink processes on the sediment dynamics of a complex mesotidal tropical estuarine system using rock magnetic, sedimentological, mineralogical, and geochemical methods. Integration of multiproxy data of catchment rocks, riverbank and hinterland soils, and bedload sediments from various depositional environment of Mandovi estuary revealed a marked change in the magnetic mineral composition and accumulation pattern. The magnetic mineralogy mainly comprised ferri‐ (magnetite, titanomagnetite) and antiferromagnetic (hematite, goethite) minerals. Higher accumulation of coarser magnetic particles in the catchment area followed by a systematic trend of progressive fining of magnetic grain size in the down reaches of the estuary can be attributed to the decrease in transport energy. Enhanced accumulation of coarser magnetic particles in the estuarine region can be reconciled with the strong tidal and wave‐induced bottom currents, which preferentially favored mineral‐density selective fractionation resulting in higher deposition of heavy (magnetic) particles. A clear trend of loss of fluvial‐derived fine silt‐size clastic sediments and selective retention of coarser and heavy magnetic particles within the estuary can be attributed to the hydrodynamic driven sediment partitioning regime, which inhibited the permanent settling of fine sediment fraction and are therefore frequently flushed out to the sea. A marked drop in S‐ratio in different zones of the estuary can be linked to the increased input of high coercive magnetic particles derived from pedogenic soils along eroding riverbanks. We further demonstrate that the S‐ratio is an effective parameter to track the riverbank erosion in an estuarine system.

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Section: Conflict Of Interestmentioning

confidence: 99%

Control of Source‐To‐Sink Processes on the Dispersal, Fractionation, and Deposition of Magnetic Minerals in a Tropical Mesotidal Estuarine System

Badesab,

Kadam,

Gullapalli

et al. 2023

Geochem Geophys Geosyst

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“…Different proxies for monsoon may provide conflicting understandings of the ISM evolution, leading to multiple points on the dynamic properties. Therefore, the combination of a variety of geological records and proxies is the key for a better understanding of the evolution and dynamics of the ISM on orbital-scale (e.g., Prell and Kutzbach, 1992;Clemens et al, 2008Clemens et al, , 2010Caley et al, 2011aCaley et al, , 2011bBadesab et al, 2021;Rawat et al, 2021). Moreover, numerical simulation is also an indispensable method to verify the causal relationship between orbital forcing and ISM (Prell and Kutzbach, 1992;Kutzbach et al, 2008;Ziegler et al, 2010a, b).…”

Section: Orbital-scale Variabilitymentioning

confidence: 99%

“…While cold and dry periods are marked by an increase in magnetic grain size indicating the shift from chemical to physical weathering in the source regions (Sebastian et al, 2019). Badesab et al (2021) evaluated the sedimentary (rock magnetic, sedimentological, mineralogical and inorganic geochemistry) records of the NGHP-01-17A core to elucidate the tectonic control on the sedimentation and diagenesis in the Andaman Sea over the past ~1 Ma. They proposed that rock magnetic properties effectively recorded the geological processes that controlled sedimentation over ~1 Ma in the Andaman Sea.…”

Section: Studies In the Indian Monsoon Regionsmentioning

confidence: 99%

Variability of indian monsoon and its forcing mechanisms since late quaternary

et al. 2022

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The Indian monsoon is an important part of the global monsoon system, allowing important transfers of moisture at a large geographical scale and deeply affecting human populations and economic prosperity of regions. The tropical summer monsoon in the Northern Hemisphere is generally considered to be driven by low latitude solar radiation. Therefore, the summer monsoon strength is near zero-phase to the maximum of Northern Hemisphere Summer Insolation (NHSI). However, records from the Arabian Sea and some other parts of the Indian Ocean (e.g., Andaman Sea) show that a ∼8 kyr phase difference exists between the Indian summer monsoon (ISM) strength and the northern Hemisphere Summer Insolation maxima, which is obviously different from the records of stalagmites in the East Asia and other marine sediments (e.g., Bay of Bengal). This leads to the “sea-land precession phase paradox” in indian summer monsoon research. This paper systematically summarizes the Indian monsoon variability on orbital scale indicated by various records from the Indian monsoon regions (including oceans and continents) since the late Quaternary. The orbital forcing of Indian monsoon, the potential phase difference between indian summer monsoon and northern Hemisphere Summer Insolation and its possible forcing mechanism(s) are further discussed. The observed phase lag between indian summer monsoon and northern Hemisphere Summer Insolation may be controlled by the Atlantic Meridional Overturning Circulation (AMOC), latent heat transfer between the southern Indian Ocean and the Asian continent, or caused by the lack of tightly coupling between the Arabian Sea summer monsoon proxies and the monsoon intensity. In addition, it is still unclear whether previous monsoon proxies can provide a strong constraint on the intensity of summer monsoon. Environmental magnetism has been widely used in high-resolution dating and the analysis of paleoclimate variabilities in marine and terrestrial sediments, due to its high sensitivity on the rainfall and temperature. Therefore, in order to solve these issues, it is necessary to combine magnetic parameters with geochemical and paleontological parameters for more systematic work in the future.

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“…Phillips et al (2014) suggested that the increase in magnetic accumulation during glacial periods might be attributed to enhanced physical weathering, which promoted the deposition of more heavy minerals. More possible mechanisms were proposed for the magnetic variations in the Bay of Bengal, for example, the sediment source variation (Prajith et al, 2018;Tripathy et al, 2011), the biogenic magnetite formation (Wang et al, 2023), the sediment transport dynamics (Weber et al, 2003), the redox environmental changes (Abrajevitch et al, 2009;Badesab et al, 2022;Li et al, 2006), tectonic (Badesab et al, 2021), and burial processes (Yang et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Magnetic Response to the Source‐To‐Sink Environmental Changes in the Bay of Bengal Since ∼60 ka

Guan,

Jiang,

et al. 2024

Paleoceanog and Paleoclimatol

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The terrestrial magnetic minerals of marine sediments are utilized to track the climatic changes in the source area and the dynamic characteristics of sedimentation processes. However, due to the varied source‐to‐sink environments, the magnetic response to ambient climate cannot be generalized. Here, we conducted systematic environmental magnetic analyses on core CJ04‐50 from the Ninetyeast Ridge and investigated its magnetic response to source‐to‐sink environmental changes. Core CJ04‐50 covers the last 60 Kyr based on accelerator mass spectrometry (AMS) 14C dating and the relative paleointensity (RPI) record. Rare earth element (REE) results suggest that the terrestrial materials are fed by the Ganges‐Brahmaputra (G‐B) and Irrawaddy/Indo‐Burma Ranges. High/low magnetic mineral content corresponds to strong/weak terristrial input during the cold/warm period. This pattern differs from that in the East Asian marginal seas, which have a high magnetic mineral content in warm periods. It might be attributed to the heavier Indian summer monsoon (ISM) precipitation than that of East Asian summer monsoon. Excessive moisture (>1,500 mm/year) would not favor the formation and preservation of magnetic minerals in the source area during interglacials. By contrast, the enhanced physical weathering during glacials results in more magnetic contributions. A significant local magnetite dissolution occurred at the layer of Middle MIS 3, which may be caused by the non‐steady state diagenesis following deposition.

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Rock magnetic evidence of tectonic control on the sedimentation and diagenesis in the Andaman Sea over ~1 million years

Cited by 7 publications

References 139 publications

Control of Source‐To‐Sink Processes on the Dispersal, Fractionation, and Deposition of Magnetic Minerals in a Tropical Mesotidal Estuarine System

Control of Source‐To‐Sink Processes on the Dispersal, Fractionation, and Deposition of Magnetic Minerals in a Tropical Mesotidal Estuarine System

Variability of indian monsoon and its forcing mechanisms since late quaternary

Magnetic Response to the Source‐To‐Sink Environmental Changes in the Bay of Bengal Since ∼60 ka

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