Geochemistry of paleosols and calcretes from Quaternary sediments of Purna alluvial basin, central India: An emphasis on paleoclimate

Srivastava, Ashok; Bansod, Mangla N.; Singh, Ajab; Sharma, Neera

doi:10.1016/j.rhisph.2019.100162

Cited by 14 publications

(4 citation statements)

References 54 publications

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“…Calcretes receive ions from different sources. Another important point emerges while making comparisons between CaO-SiO2 and MgO-CaO, dolocretes and calcretes cluster in different regions on the diagrams [65] This situation, observed not only in the main oxide values but also in SEM, XRD and C and O stable isotope studies, clearly indicates the consistency between the analyses.…”

Section: Discussionmentioning

confidence: 74%

“…Moreover, while there is a linear relationship between MgO-CaO in dolocretes, there is an inverse relationship between MgO-CaO in calcretes. This clearly shows that CaO and MgO act together from the same source, especially in the formation of dolocretes [63][64][65]. Calcretes receive ions from different sources.…”

Section: Discussionmentioning

confidence: 99%

“…Additionally, the reddish to yellowish brown coloration, high calcification in paleosols and the preservation of rhizoliths and lime nodules were interpreted as being formed under arid to semi-arid climatic conditions. [1,14,65]. Therefore, it is possible to reveal the paleo-tectonic 2 history of an area by defining the stratigraphic position and characteristics (cyclicity characters) of calcretes sequences controlled by active tectonic [15].…”

Section: Introductionmentioning

confidence: 99%

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Geochemical and Geological Features of the Calcrete Formations in Konya (Central Turkey) and Their Relationship With the Konya Fault Zone

Delikan,

Alfatlawi

2023

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The Konya Closed Basin (Quaternary, Central Turkey) is a graben basin which expands toward the east-west and it is controlled by faults on three sides: The Konya fault zone in the west, the Divanlar fault zone in the east and the Karaömerler fault zone in the north. Calcretes developed in relation to fault systems in the Konya region are concentrated in areas where faults cut Quaternary aged terrestrial deposits. In this study, it is aimed to elucidate the deposition conditions, geochemistry and age (with ESR method) of the calcareous deposits associated with faults in the Konya Closed Basin. Calcretes in the region existing as coatings, dust, nodules and layers are in the form of dolocrete and clayey calcrete. Dolocretes were deposited in the Quaternary terrestrial sediments on the ophiolitic rocks and geochemical data point to an ultramafic source. Bacterial community, clay, quartz minerals and calcite cement are observed in the calcretes formed in areas with limestone basement. According to the results of ICP-MS analysis of samples taken from Konya calcretes, the %MgO contents are between 0.99 and 7.7; CaO%: between 34.71 and 50.71; %SiO2 between 3.22 and 20.59. %MgO in dolocretes are between 11.65 and 21.01; %CaO between 8.44 and 29.57; %SiO2 values between 4.48 and 9.17 The δ13C and δ18O isotope values of calcretes range from -3.87 to -7.62 and from -3.62 to -7.45 respectfully. Average δ13C values indicate that calcrete formation took place under pedogenic condition or in shallow groundwater. The calcretes deposited in 3 locations around the city of Konya (on the Konya fault zone) were dated by using the Electron Spin Resonance (ESR) method and ages between 217.47 and 389.85 ky were obtained. The calcrete samples taken from the fault planes (dip-slip normal fault bordering the Upper Cretaceous Ophiolitic Mélange and the Quaternary Karahüyük Formation) gave a relative age for faulting as being 292.86 ky. This first dating study conducted in the Konya Fault Zone has provided important clues to elucidate the formation history of Konya Closed Basin (KCB) and the paleo-seismological past of Konya.

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Section: Discussionmentioning

confidence: 74%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Geochemical and Geological Features of the Calcrete Formations in Konya (Central Turkey) and Their Relationship With the Konya Fault Zone

Delikan,

Alfatlawi

2023

Preprint

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“…It is considered as the extension of the previous facies, that is, stratified sandy‐silty‐clay (Fl) facies. Information about the lithological and lithofacies architectures of both the successions, their comparison with other ash‐bearing lithocolumns in the basin area, and geochemical signatures of paleosols and calcretes therein have been provided in detail by Srivastava & Singh, 2019b, Srivastava, Bansod, Singh, & Sharma, 2019.…”

Section: Lithological Set‐up Of the Ash‐bearing Localitiesmentioning

confidence: 99%

Lithological, physical and chemical attributes of primary volcanic ash of YTT, Purna alluvial basin, Central India

Srivastava

Singh

2020

Geological Journal

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Youngest Toba Tuff (YTT) ash preserved at two different localities in the Quaternary sediments of Purna alluvial basin have been categorised as of the primary nature on the basis of for their lithological, physical and geochemical characteristics. These ash are light grey, massive to faintly laminated and occur as discontinuous beds of 15-20 cm thickness, extending laterally for 70-100 m that are hosted in yellowishbrown, laminated silty-clay lithounits. It consists of high-quantity vitric grains represented by bubble wall, blocky and pumice shards in decreasing order of percentage, light and heavy minerals and fine-grained unidentifiable admixture. Major oxides data through EPMA of glass shards show rhyolitic composition being rich in SiO 2 , K 2 O and Na 2 O percentage, whereas ICP-MS data exhibit enriched LREE, depleted HREE and negative Eu anomaly. Pre-tephra successions at both the localities show preservations of various biogenic and non-biogenic structures having control of specific environmental conditions on their formation, that is, pedogenic calcretes, rhizolith balls and insect agriculture activities in the form of calcretised bodies.

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Model showing influence of tectonics and energy condition of the fluvial environment on facies architecture: A case history of Quaternary alluvial deposits of Purna basin, central India

et al. 2020

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Geochemistry of paleosols and calcretes from Quaternary sediments of Purna alluvial basin, central India: An emphasis on paleoclimate

Cited by 14 publications

References 54 publications

Geochemical and Geological Features of the Calcrete Formations in Konya (Central Turkey) and Their Relationship With the Konya Fault Zone

Geochemical and Geological Features of the Calcrete Formations in Konya (Central Turkey) and Their Relationship With the Konya Fault Zone

Lithological, physical and chemical attributes of primary volcanic ash of YTT, Purna alluvial basin, Central India

Model showing influence of tectonics and energy condition of the fluvial environment on facies architecture: A case history of Quaternary alluvial deposits of Purna basin, central India

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