Clastic rock geochemistry of Punagarh basin, trans-Aravalli region, NW Indian shield: implications for paleoweathering, provenance, and tectonic setting

Khan, Tavheed; Khan, Mohammad Shamim

doi:10.1007/s12517-014-1441-8

Cited by 31 publications

(10 citation statements)

References 64 publications

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“…0.90 to 0.82 Ga; Dharma Purohit et al, 2012;de Wall et al, 2012de Wall et al, , 2014 comprises isolated outcrops of low-grade metasedimentary rocks intruded by the Erinpura granite at circa 0.86-0.78 Ga (Choudhary et al, 1984;Crawford, 1975;Just et al, 2011;Meert et al, 2013;Singh et al, 2010) and the Malani Igneous Suite at circa 0.77 Ga (Gregory et al, 2009). The Sirohi terrane is overlain by volcano-sedimentary rocks of Sindreth and Punagarh basins of circa 0.76 Ga old (Dharma Rao et al, 2012;Khan & Khan, 2015;Van Lente et al, 2009). The SDT is characterized by extensive passive margin quartzite, pelite, carbonate metasedimentary rocks (sedimentation age is (Gupta et al, 1980;Singh et al, 2010); (c) geological map and cross sections along AB, CD, and EF of Ambaji granulite.…”

Section: Regional Tectonic Frameworkmentioning

confidence: 99%

Dynamics, EPMA Th‐U‐Total Pb Monazite Geochronology and Tectonic Implications of Deformational Fabric in the Lower‐Middle Crustal Rocks: A Case Study of Ambaji Granulite, NW India

Tiwari

Biswal

2019

Tectonics

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Strain fabric and monazite microstructure were studied and dated by Electron Probe Microanalyser (EPMA) in situ Th‐U‐total Pb monazite geochronology in the Ambaji granulite, South Delhi terrane, NW India. The Ambaji granulite comprises pelitic, calcareous, and mafic granulites with several phases of granite intrusions, G0‐3. The granulites were deformed by three phases of folding, F1–3, during South De lhi orogeny and marked by a subhorizontal pervasive fabric, S1, axial planar to isoclinal‐recumbent F1 folds that developed during granulite facies metamorphism. S1 is overprinted by discrete sets of subvertical shear zones associated with a mylonitic fabric, S2, that were developed axial planar to NE‐SW striking upright F2 folds and facilitated exhumation of granulite facies rocks to the upper crust. The shear zones show early history of high‐temperature thrust sense shear and late stage low‐temperature sinistral shear. The NW‐SE striking F3 folds also affected the granulite facies rocks resulting in interference patterns and variations in regional structural trends. Brittle strike slip, and normal fault (Sf fabric) that developed post F3, led the final exhumation of the granulite facies rocks to the surface. The S1 monazites are Y‐depleted and recrystallized through dislocation creep, and the S2‐Sf monazites are Y‐enriched and recrystallized through dissolution‐precipitation creep. Different monazite population yielded distinct ages of circa 875‐857, 834‐778, and 764‐650 Ma for S1, S2, and Sf strain, respectively, indicating that the South Delhi orogeny spanned 875‐650 Ma overlapping with the early phase of the Pan‐African orogeny or representing a transition between Grenvillian and Pan‐African orogeny.

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Section: Regional Tectonic Frameworkmentioning

confidence: 99%

Dynamics, EPMA Th‐U‐Total Pb Monazite Geochronology and Tectonic Implications of Deformational Fabric in the Lower‐Middle Crustal Rocks: A Case Study of Ambaji Granulite, NW India

Tiwari

Biswal

2019

Tectonics

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“…To further evaluate intensity of chemical weathering, different workers prefer to use the Al 2 O 3 ‐(CaO* + Na 2 O)‐K 2 O (A–CN–K) ternary plot than to compare only numerical values (Fatima & Khan, ; Khan & Khan, ; Nesbitt & Young, , ). In this diagram (Figure a), Al 2 O 3 (A apex), CaO* + Na 2 O (CN apex), and K 2 O (K apex) are in molar proportions, where CaO * represents CaO in silicate fractions (Nesbitt & Young, , ).…”

Section: Discussionmentioning

confidence: 99%

“…ternary plot than to compare only numerical values (Fatima & Khan, 2012;Khan & Khan, 2015;Nesbitt & Young, 1984. In this diagram ( Figure 9a), Al 2 O 3 (A apex), CaO* + Na 2 O (CN apex), and K 2 O (K apex) are in molar proportions, where CaO * represents CaO in silicate fractions (Nesbitt & Young, 1984.…”

Section: Major Oxidesmentioning

confidence: 99%

Geochemistry of the Palaeoproterozoic quartzites of Lower Cuddapah Supergroup, South India: Implications for the palaeoweathering, provenance, and crustal evolution

et al. 2019

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The lower part of the Proterozoic Cuddapah Basin exposes three quartzite sequences, namely, Gulcheru, Pulivendla, and Gandikota formations. Gulcheru Quartzites show angular to subangular texture, whereas Pulivendla and Gandikota quartzites contain rounded to subrounded detrital grains. Mineralogically, all quartzites are predominantly composed of quartz with subordinate amount of feldspar, mica, and heavy minerals. Clay and silt are present as a matrix while silica and carbonate act as a cementing material. Based on detrital modes and major element geochemistry, these sediments are classified as arkose to subarkose. The petrological and geochemical attributes of the basal formations of the Cuddapah quartzite indicate cyclic weathering under variable humid subtropical climate. The CIA values of these quartzites suggest moderate to intense chemical weathering for the Gulcheru and Gandikota quartzites and low to moderate chemical weathering for Pulivendla Quartzites. The major element ratios (SiO2/Al2O, K2O/Na2O), trace element ratios, chondrite‐normalised REE patterns and UCC normalised multi element diagrams suggest that these quartzites were predominantly derived from the felsic sources, with subordinate contribution from mafic sources. Provenance studies and mixing models, in conjunction with palaeocurrent data suggest that these quartzites of the Lower Cuddapah Supergroup received sediments from various sources including Eastern Dharwar Craton as well as from more juvenile crust.

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“…Weathering and diagenetic processes, as well as the composition of source areas, predominantly affect the composition of the clastic sedimentary rocks. Furthermore, the chemical composition of sedimentary rocks not only gives valuable information on source area weathering conditions but can also tell about recycling and maturity of sediments during deposition (Guo et al, 2012;Khan & Khan, 2015;McLennan et al, 1993). Nesbitt and Young's (1982) (Harnois, 1988 The A-CN-K ternary diagram is an easy and reliable approach to assess the chemical weathering trend, but the values must be converted from weight percent (%) to molecular fraction (Nesbitt, 2003;Nesbitt & Young, 1984).…”

Section: Weathering and Sediment Recyclingmentioning

confidence: 99%

Geochemistry of Eocene Bawang Member turbidites of the Belaga Formation, Borneo: Implications for provenance, palaeoweathering, and tectonic setting

et al. 2020

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The Belaga Formation of the Rajang Group or Rajang Fold and Thrust Belt (Late Cretaceous to Late Eocene) is mostly exposed in Sibu Zone along with some exposures in the Miri Zone of Central Sarawak. This entire turbiditic sequence was believed to have been deposited in a deep marine environment in a basin having an overall passive margin setting, that is, the Rajang Sea. However, the Eocene age‐related stratigraphic record of this group (including Bawang Member) is much more complex, due to the complicated geological and tectonic settings which prevailed during their deposition. Here, we present field observations along with the application of various geochemical proxies and their constraints for the understanding of provenance, palaeo‐weathering, and tectonic evolution of the area during the deposition of Bawang turbidites. Based on field observation, it has been found that this member consists of four main lithofacies, including massive sandstone facies (MSF), thick‐bedded facies (TBF), heterolithic facies (HF), and mud facies (MF). Using geochemical data, chemical weathering indices (CIA and CIW) values and A‐CN‐K plot show that the source area for Bawang turbidites has undergone a moderate to an intense degree of chemical weathering and was influenced by the recycling effect. The slight depletion in sandstones and shales for Cr, Ni, and V values is consistent with the felsic dominated source region; however, La/Sc versus Co/Th and La/Th versus Hf plots show a mixed source (felsic and intermediate volcanic source) with some input of recycled sediments from the older sedimentary to metasedimentary rocks. Various geochemical ratios and discriminant diagrams verify that the Schwaner Mountains and its metamorphic group of rocks were the principal provenances for these sediments, along with some input from West Borneo. The results of the geochemical analysis also show that Bawang turbidite sediments were deposited in a basin associated with an initial active continental margin setting and the basin was shifting towards a passive setting (Late Eocene–Oligocene). The volcanic input in Bawang Member during the Late Eocene also suggests the involvement of some subsequent possible arc setting around the “Bawang subbasin”.

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Clastic rock geochemistry of Punagarh basin, trans-Aravalli region, NW Indian shield: implications for paleoweathering, provenance, and tectonic setting

Cited by 31 publications

References 64 publications

Dynamics, EPMA Th‐U‐Total Pb Monazite Geochronology and Tectonic Implications of Deformational Fabric in the Lower‐Middle Crustal Rocks: A Case Study of Ambaji Granulite, NW India

Dynamics, EPMA Th‐U‐Total Pb Monazite Geochronology and Tectonic Implications of Deformational Fabric in the Lower‐Middle Crustal Rocks: A Case Study of Ambaji Granulite, NW India

Geochemistry of the Palaeoproterozoic quartzites of Lower Cuddapah Supergroup, South India: Implications for the palaeoweathering, provenance, and crustal evolution

Geochemistry of Eocene Bawang Member turbidites of the Belaga Formation, Borneo: Implications for provenance, palaeoweathering, and tectonic setting

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