Holocene tectonic uplift using geomorphometric parameters, GIS and OSL dating: Palar River basin, southern peninsular India

Resmi, M. R.; Achyuthan, Hema; Jaiswal, Manoj K.

doi:10.1127/zfg/2017/0433

Cited by 7 publications

(1 citation statement)

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“…Some studies have also been reported from the southeastern part of the Indian peninsula. Resmi et al (2017) also carried out geomorphologic study using morphometric indices analyses and OSL dating across the Palar River basin (Fig. 8).…”

Section: Southern and Central Peninsular Shieldmentioning

confidence: 99%

Paleoseismological Studies in India (2016-2020): Status and Prospects

Rajendran¹,

Singh²,

Mukul³

et al. 2020

PINSA

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The last few years have witnessed consistent growth in paleoseismic investigations and active fault research in India. An overview of relevant publications during 2016-2020 indicates that this field is now widely accepted as a tool to characterize the seismic hazard in the country. Such studies initiated in the country in early nineties have gained momentum and widened its scope into a variety of tectonic and morphological settings.While earthquake frequency and fault activations are major objectives of such studies, the Indian researchers are now equally interested in constraining the fault geometry and the nature of near-surface crustal deformation, thereby contributing to earthquake hazard evaluations. This has been driven by an ever-increasing interaction between experts from associated fields like geomorphology, neotectonics, seismology, geodesy, modeling etc. Future challenges would include integrating the paleoseismological observations with the relevant geophysical inputs to develop physical models of the earthquake cycles, ultimately leading to an inventory of the active faults. Although there are gaps and disagreements on how things operated at different spatial and temporal scales, there have been broad agreements in general. The future should focus on evolving new strategies and methodologies to integrate different datasets in a coherent manner to yield practically relevant results and models that can explain data from various spatial and temporal scales.

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Section: Southern and Central Peninsular Shieldmentioning

confidence: 99%

Paleoseismological Studies in India (2016-2020): Status and Prospects

Rajendran¹,

Singh²,

Mukul³

et al. 2020

PINSA

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Geochemical Signatures of Karlad Lake Sediments, North Kerala: Source Area Weathering and Provenance

Babeesh

Achyuthan

Sajeesh

2018

Journal of the Geological Society of India

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In the present study, the lake floor sediments of the Karlad lake, located at higher elevation in Wayanad region of north Kerala, were analyzed for textural characteristics, organic matter, calcium carbonate, major oxides and trace elements. This study was carried out to infer the chemical composition, provenance and intensity of chemical weathering of the source rocks in the lake catchment area. Textural studies signify that lake floor sediments are predominantly as clays (38.75%) followed by sand (36.36%) and silt (25.19%) fractions. The C/N ratio of the lake sediments signify that the sediments are both autochthonous and allochthonous in origin. The major oxides average content reveals the order of abundance as follows; SiO2 > Al2O3 > Fe2O3 > TiO2 > MgO > CaO > K2O > P2O5 > Na2O > MnO. Moreover, the various weathering indices such as Chemical Index of Alteration (CIA-Avg. 93.5%), PlagioclaseIndex of Alteration (PIA-Avg. 95.6%) and Chemical Index of Weathering (CIW-Avg. 95.76%) suggest an intense chemical weathering of the source area. The A-CN-K diagram is also corroborating the same. Various provenance discrimination diagrams reveal that the sediments are derived from the mafic source rocks.

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Mapping of the Buried Paleochannels on the Terminal Fans in the Western Ganga Plain: A Geomorphological and Ground Penetrating Radar-based Approach

Patel

Pati

2022

Journal of the Geological Society of India

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Paleochannels are valuable tools for delineating tectonics, climate, anthropogenic activities, reconstructing the paleo-geography, and studying the geomorphological evolution of the alluvial plains. Paleochannels on the terminal fans provide crucial information regarding their geomorphic evolution in space and time. Furthermore, paleochannels could be a good source for groundwater exploration. Exposed paleochannels in the recent alluvial plains are mappable by remote sensing and field evidence. However, mapping becomes difficult due to burial in relatively older alluvial surfaces, and anthropogenic disturbances complicate the case. This paper deals with an integrated method of mapping the buried paleochannels in the terminal fans from the western Ganga plain. Paleochannels have been mapped on three Holocene terminal fans, using remote sensing and Google Earth images, and Cartosat DEM. As continuity of the entire length of paleochannels could not be traced by the above tools due to burial and intense anthropogenic modifications, aligned surface water bodies were helpful at places to ascertain their continuity. The ground penetrating radar (GPR) survey by bistatic antennae (100 MHz frequency in distance mode) detected the subsurface existence of these buried paleochannels up to a maximum depth of about 35 m. Field evidence of some of these buried channels was confirmed at few excavations by the presence of channel sand. A previous study of these terminal fans through optical stimulated luminescence (OSL) dating suggests that channel abandonment occurred between 4.7 to 2.3 Ka, coinciding with the period of the dry climate and intense surface faulting episodes in the Ganga plain.

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Holocene tectonic uplift using geomorphometric parameters, GIS and OSL dating: Palar River basin, southern peninsular India

Cited by 7 publications

References 0 publications

Paleoseismological Studies in India (2016-2020): Status and Prospects

Paleoseismological Studies in India (2016-2020): Status and Prospects

Geochemical Signatures of Karlad Lake Sediments, North Kerala: Source Area Weathering and Provenance

Mapping of the Buried Paleochannels on the Terminal Fans in the Western Ganga Plain: A Geomorphological and Ground Penetrating Radar-based Approach

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