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![First thumbnail for: Incidence of Sulphide Mineralization in Porcellani...]()
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![(a) Showing open scrub in Chopan watershed near Binaikheri village. (b) showing cultivated land in Chopan watershed near the check dam. (c) showing uncultivated land near Bajrangarh. (d) showing wasteland ear Bajrangarh town]()
![Location map of the Chopan watershed.]()
![Superimposition of slope, land use change, drainage map of the Chopan watershed]()
![Location map of the Chopan watershed.]()
![Drainage network of the Chopan watershed.]()
![Binary variation diagrams between Zr vs. Ti, Zr vs. Nb, Zr vs. Yb, Eu/Eu* vs. Sr, K vs. Ba, and [La/Yb] vs [Nb/Yb] for Deonar pyroclastics. ‘A’ bounded by smooth line represents field for Deonar Pyroclastics and Chopan Porcellanites from Son valley. Porcellanite Formation data is from Chopan area (Chakrabarti et al. 2007); ‘B’ bounded by dashed line represents field for Owk Shale Tuff from Kurnool basin; ‘C’ shaded represents field for Singhora Tuff from Chhattisgarh basin. Data sources are mentioned in the text. Data sources are mentioned in the text.]()
![Geological map of the Vindhyan basin, in Sonbhadra District, Uttar Pradesh, central India. Inset: Details of the sampling locations, 1 = Dalla; 2 = Chopan.]()
![PAAS normalized REE patterns of Deonar Porcellanite, show overlapping with the Chopan Porcellanites (Mishra and Sen, 2008) field]()
![First thumbnail for: Spatio-Temporal Land Cover Changes in a Semi-Arid ...]()
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![First thumbnail for: Geochemistry of Mesoproterozoic Deonar Pyroclastic...]()
![Second thumbnail for: Geochemistry of Mesoproterozoic Deonar Pyroclastic...]()
![Third thumbnail for: Geochemistry of Mesoproterozoic Deonar Pyroclastic...]()
![Multi-element data plots for Deonar pyroclastics. For comparison data for Chopan porcellanites (Mishra and Sen, 2008), Singhora Tuffs (Das et al. 2009) and Owk Shale Tuff (Saha and Tripathy, 2012) have been plotted]()
![First thumbnail for: Slope Stability Analysis Based on Rock Mass Rating...]()
![Second thumbnail for: Slope Stability Analysis Based on Rock Mass Rating...]()
![Third thumbnail for: Slope Stability Analysis Based on Rock Mass Rating...]()
![Chondrite normalized REE patterns of Deonar Pyroclastics. They are more comparable to its counterparts Chopan Porcellanites (Mishra and Sen, 2008) and Singhora Tuff (Das et al. 2009) than to Owk Shale Tuff (Saha and Tripathy, 2012). Normalization values are after Sun & McDonough (1989).]()
![First thumbnail for: Prioritization of Sub-Watersheds for Conservation ...]()
![Second thumbnail for: Prioritization of Sub-Watersheds for Conservation ...]()
![Third thumbnail for: Prioritization of Sub-Watersheds for Conservation ...]()
![Major elements vs. SiO2 variation diagrams of Deonar Pyroclastics. ‘A’ bounded by smooth line represents field for Deonar Pyroclastics and Chopan Porcellanites from Son valley; ‘B’ bounded by dashed line represents field for Owk Shale Tuff from Kurnool basin; ‘C’ shaded represents field for Singhora Tuff from Chhattisgarh basin. Data sources are mentioned in the text.]()
![Showing incompatible element data plotted over SiO2 vs Zr/TiO2 for Deonar pyroclastics for comparison with Chopan porcellanite shales. Fields are after Winchester and Floyd (1977), (a) (Zr/TiO2) x 0.0001 versus SiO2 and (b) Nb/Y versus (Zr/ TiO2) x 0.0001. Data for altered porcellanite has not been plotted.]()
![First thumbnail for: U-Pb Age and Hf Isotopic Compositions of Magmatic ...]()
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1-20 OF 39 RESULTS FOR
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Journal Article
Incidence of Sulphide Mineralization in Porcellanite of the Chopan Formation from the Vindhyan Supergroup, Eastern India Available to Purchase
Publisher: Geological Society of India
Published: 01 May 2022
Jour. Geol. Soc. India (2022) 98 (5): 641–646.
... ; Srivastava, 1977 ; Soni et al., 1987 ; Chakrabarti et al., 2007; Paikaray et al., 2008 ; Mishra and Sen, 2010 ; Mishra et al., 2017) . Rasmussen et al. (2002) and Ray et al. (2002) published precise U-Pb zircon ages of 1628±8 Ma and 1631±5 Ma for Chopan Porcellanite. A very coarse-grained true rhyolite...
FIGURES
Journal Article
U-Pb Age and Chemical Composition of an Ash Bed in the Chopan Porcellanite Formation, Vindhyan Supergroup, India Available to Purchase
Journal: The Journal of Geology
Publisher: The University of Chicago Press
Published: 01 September 2018
The Journal of Geology (2018) 126 (5): 553–560.
... in the Son River valley in northern India ( fig. 1 ). These rocks constitute the Porcellanite Formation (also known as the Chopan Porcellanite and Deonar Formations in, respectively, the eastern and western parts of Son valley), which occurs in the Semri Group, near the base of the Vindhyan Supergroup...
FIGURES
Journal Article
The Mid-Proterozoic Vindhyan Macrobiota from Chopan, Southeast Uttar Pradesh Available to Purchase
Publisher: Geological Society of India
Published: 01 June 1988
Jour. Geol. Soc. India (1988) 31 (6): 584–590.
...P. K. Maithy; Rupendra Babu Abstract Macrobiota comprising body fossils and trace fossils are reported from the Semri and Kaimur Groups of the Vindhyan Supergroup exposed around Chopan. Carbonaceous compressions of Chuaria minima and Tawuia dalensis, impressions of Sekwia excentrica and moulds...
Image
(a) Showing open scrub in Chopan watershed near Binaikheri village. (b) ... Available to Purchase
in Spatio-Temporal Land Cover Changes in a Semi-Arid Watershed: Central India
> Journal of the Geological Society of India
Published: 01 November 2016
Fig.4. (a) Showing open scrub in Chopan watershed near Binaikheri village. (b) showing cultivated land in Chopan watershed near the check dam. (c) showing uncultivated land near Bajrangarh. (d) showing wasteland ear Bajrangarh town
Image
Location map of the Chopan watershed. Available to Purchase
in Spatio-Temporal Land Cover Changes in a Semi-Arid Watershed: Central India
> Journal of the Geological Society of India
Published: 01 November 2016
Fig.1. Location map of the Chopan watershed.
Image
Superimposition of slope, land use change, drainage map of the Chopan water... Available to Purchase
in Spatio-Temporal Land Cover Changes in a Semi-Arid Watershed: Central India
> Journal of the Geological Society of India
Published: 01 November 2016
Fig.8. Superimposition of slope, land use change, drainage map of the Chopan watershed
Image
Location map of the Chopan watershed. Available to Purchase
in Prioritization of Sub-Watersheds for Conservation Measures in a Semi Arid Watershed Using Remote Sensing and GIS
> Journal of the Geological Society of India
Published: 01 August 2016
Fig.1. Location map of the Chopan watershed.
Image
Drainage network of the Chopan watershed. Available to Purchase
in Prioritization of Sub-Watersheds for Conservation Measures in a Semi Arid Watershed Using Remote Sensing and GIS
> Journal of the Geological Society of India
Published: 01 August 2016
Fig.2. Drainage network of the Chopan watershed.
Image
![Binary variation diagrams between Zr vs. Ti, Zr vs. Nb, Zr vs. Yb, Eu/Eu* vs. Sr, K vs. Ba, and [La/Yb] vs [Nb/Yb] for Deonar pyroclastics. ‘A’ bounded by smooth line represents field for Deonar Pyroclastics and Chopan Porcellanites from Son valley. Porcellanite Formation data is from Chopan area (Chakrabarti et al. 2007); ‘B’ bounded by dashed line represents field for Owk Shale Tuff from Kurnool basin; ‘C’ shaded represents field for Singhora Tuff from Chhattisgarh basin. Data sources are mentioned in the text. Data sources are mentioned in the text.](https://gsw.silverchair-cdn.com/gsw/Content_public/Journal/jour-geosocindia/89/4/10.1007_s12594-017-0618-7/7/s_1259401706187-fig005.jpeg?Expires=2147483647&Signature=ss1Zcg6IyvK210YbyBFmBvabRV92iGNKqzzlK9bvtp76CKdebjo89PyKwPvnm68vEJiprMuhq0FKGoVw5x5D9ul-IGLGZH7pMw0Ry1KoXFh6Acq8OEFV8QpUvRxcQTOzNeJeVM5ijDoanKuDAgS2SheYXEzubAOoghWXsUtjiN4HtwhmggGqBULMuIu2FqUOchkRejgLilyumHRQqbib998j44gPrXoD2Ixvgf7hN~w-10uyzJkTTVx4KimATozz0xwsxZPza~3FiKvmiv52dJv3McaYM1mU0CKnsZMo5cm5Cawpv6O2TQir4teskSFgYVFSCxKphEjJ2kPXGz6X6A__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
Binary variation diagrams between Zr vs. Ti, Zr vs. Nb, Zr vs. Yb, Eu/Eu* v... Available to Purchase
in Geochemistry of Mesoproterozoic Deonar Pyroclastics from Vindhyan Supergroup of Central India: Evidences of Felsic Magmatism in the Son Valley
> Journal of the Geological Society of India
Published: 01 April 2017
Fig.5. Binary variation diagrams between Zr vs. Ti, Zr vs. Nb, Zr vs. Yb, Eu/Eu* vs. Sr, K vs. Ba, and [La/Yb] vs [Nb/Yb] for Deonar pyroclastics. ‘ A’ bounded by smooth line represents field for Deonar Pyroclastics and Chopan Porcellanites from Son valley. Porcellanite Formation data is from
Image
Geological map of the Vindhyan basin, in Sonbhadra District, Uttar Pradesh,... Available to Purchase
in Unravelling Source Area Composition for the Paleoproterozoic Basal Conglomerate (Vindhyan Supergroup) around Dalla, Sonbhadra District, Central India
> Journal of the Geological Society of India
Published: 01 February 2023
Fig. 1 Geological map of the Vindhyan basin, in Sonbhadra District, Uttar Pradesh, central India. Inset: Details of the sampling locations, 1 = Dalla; 2 = Chopan.
Image
PAAS normalized REE patterns of Deonar Porcellanite, show overlapping with ... Available to Purchase
in Geochemistry of Mesoproterozoic Deonar Pyroclastics from Vindhyan Supergroup of Central India: Evidences of Felsic Magmatism in the Son Valley
> Journal of the Geological Society of India
Published: 01 April 2017
Fig.9. PAAS normalized REE patterns of Deonar Porcellanite, show overlapping with the Chopan Porcellanites ( Mishra and Sen, 2008 ) field
Journal Article
Spatio-Temporal Land Cover Changes in a Semi-Arid Watershed: Central India Available to Purchase
Publisher: Geological Society of India
Published: 01 November 2016
Jour. Geol. Soc. India (2016) 88 (5): 576–584.
...Fig.4. (a) Showing open scrub in Chopan watershed near Binaikheri village. (b) showing cultivated land in Chopan watershed near the check dam. (c) showing uncultivated land near Bajrangarh. (d) showing wasteland ear Bajrangarh town ...
FIGURES
Journal Article
Geochemistry of Mesoproterozoic Deonar Pyroclastics from Vindhyan Supergroup of Central India: Evidences of Felsic Magmatism in the Son Valley Available to Purchase
Publisher: Geological Society of India
Published: 01 April 2017
Jour. Geol. Soc. India (2017) 89 (4): 375–385.
...Fig.5. Binary variation diagrams between Zr vs. Ti, Zr vs. Nb, Zr vs. Yb, Eu/Eu* vs. Sr, K vs. Ba, and [La/Yb] vs [Nb/Yb] for Deonar pyroclastics. ‘ A’ bounded by smooth line represents field for Deonar Pyroclastics and Chopan Porcellanites from Son valley. Porcellanite Formation data is from...
FIGURES
Image
Multi-element data plots for Deonar pyroclastics. For comparison data for C... Available to Purchase
in Geochemistry of Mesoproterozoic Deonar Pyroclastics from Vindhyan Supergroup of Central India: Evidences of Felsic Magmatism in the Son Valley
> Journal of the Geological Society of India
Published: 01 April 2017
Fig.6. Multi-element data plots for Deonar pyroclastics. For comparison data for Chopan porcellanites ( Mishra and Sen, 2008 ), Singhora Tuffs ( Das et al. 2009 ) and Owk Shale Tuff ( Saha and Tripathy, 2012 ) have been plotted
Journal Article
Slope Stability Analysis Based on Rock Mass Rating, Geological Strength Index and Kinematic Analysis in Vindhyan Rock Formation Available to Purchase
Publisher: Geological Society of India
Published: 01 February 2021
Jour. Geol. Soc. India (2021) 97 (2): 145–150.
... in and around Markundi hill along SH-5, Chopan, Sonbhadra. The relationship between RMR and GSI for Vindhyan sandstone in the study area has been attempted using generalize equation proposed by Hoek (2013) while the kinematic analysis has been applied to decipher the weak zone of failure using RocScience Dips...
FIGURES
Image
Chondrite normalized REE patterns of Deonar Pyroclastics. They are more com... Available to Purchase
in Geochemistry of Mesoproterozoic Deonar Pyroclastics from Vindhyan Supergroup of Central India: Evidences of Felsic Magmatism in the Son Valley
> Journal of the Geological Society of India
Published: 01 April 2017
Fig.7. Chondrite normalized REE patterns of Deonar Pyroclastics. They are more comparable to its counterparts Chopan Porcellanites ( Mishra and Sen, 2008 ) and Singhora Tuff ( Das et al. 2009 ) than to Owk Shale Tuff ( Saha and Tripathy, 2012 ). Normalization values are after Sun & McDonough
Journal Article
Prioritization of Sub-Watersheds for Conservation Measures in a Semi Arid Watershed Using Remote Sensing and GIS Available to Purchase
Publisher: Geological Society of India
Published: 01 August 2016
Jour. Geol. Soc. India (2016) 88 (2): 185–196.
...Fig.1. Location map of the Chopan watershed. ...
FIGURES
Image
Major elements vs. SiO 2 variation diagrams of Deonar Pyroclastics. ‘ A’ ... Available to Purchase
in Geochemistry of Mesoproterozoic Deonar Pyroclastics from Vindhyan Supergroup of Central India: Evidences of Felsic Magmatism in the Son Valley
> Journal of the Geological Society of India
Published: 01 April 2017
Fig.4. Major elements vs. SiO 2 variation diagrams of Deonar Pyroclastics. ‘ A’ bounded by smooth line represents field for Deonar Pyroclastics and Chopan Porcellanites from Son valley; ‘ B’ bounded by dashed line represents field for Owk Shale Tuff from Kurnool basin; ‘ C’ shaded represents
Image
Showing incompatible element data plotted over SiO 2 vs Zr/TiO 2 for Deon... Available to Purchase
in Geochemistry of Mesoproterozoic Deonar Pyroclastics from Vindhyan Supergroup of Central India: Evidences of Felsic Magmatism in the Son Valley
> Journal of the Geological Society of India
Published: 01 April 2017
Fig.8. Showing incompatible element data plotted over SiO 2 vs Zr/TiO 2 for Deonar pyroclastics for comparison with Chopan porcellanite shales. Fields are after Winchester and Floyd (1977) , (a) (Zr/TiO 2 ) x 0.0001 versus SiO 2 and (b) Nb/Y versus (Zr/ TiO 2 ) x 0.0001. Data for altered
Journal Article
U-Pb Age and Hf Isotopic Compositions of Magmatic Zircons from a Rhyolite Flow in the Porcellanite Formation in the Vindhyan Supergroup, Son Valley (India): Implications for Its Tectonic Significance Available to Purchase
Journal: The Journal of Geology
Publisher: The University of Chicago Press
Published: 01 May 2017
The Journal of Geology (2017) 125 (3): 367–379.
.... 2009 Bargawan Limestone Khenjua/Koldaha Shale (Chopan) Porcellanite Greenish/opaline tuff Massive tuff Banded tuff Rhyolite 1628 ± 10 1631 ± 5 1642 ± 7 Rasmussen et al. 2002 ; Ray et al. 2002 This work Kajrahat Limestone 1729 ± 110 Sarangi et al. 2004...
FIGURES
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