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Kolhan Group

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Journal Article
Published: 01 June 2006
South African Journal of Geology (2006) 109 (1-2): 183-192.
.... These successions include a characteristic lime-mudstone-shale assemblage that has been deposited in a deep-water cratonic depositional setting beyond the reach of coarser detritus. The Kolhan Group occurring on the Singhbhum craton at the northeastern corner of the southern Indian craton also includes similar lime...
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Image
Geological map illustrating the distribution of the <b>Kolhan</b> <b>Group</b>.
Published: 01 June 2006
Figure 2. Geological map illustrating the distribution of the Kolhan Group.
Journal Article
Journal: Economic Geology
Published: 01 March 2008
Economic Geology (2008) 103 (2): 365-386.
... in a conglomerate at the base of the Meso- to Neoproterozoic Kolhan Group near Noamundi attest to the antiquity of the hard hematite orebodies. Soft saprolitic iron ores formed as a product of lateritic weathering processes in Cretaceous-Cenozoic times. Supergene alteration took place under the influence...
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Series: Geological Society, London, Memoirs
Published: 01 January 2015
DOI: 10.1144/M43.9
EISBN: 9781862397194
... deformation throughout the western Iron Ore Group belt. Involvement of the Kolhan Group in the deformation milieu constrains the timing of this orogeny to the Grenvillian ( c. 1.0 Ga). The Precambrian crust evolved mostly through various geodynamic and geochemical activities in the Earth’s crust–mantle...
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Series: Geological Society, London, Memoirs
Published: 01 January 2015
DOI: 10.1144/M43.21
EISBN: 9781862397194
... Abstract There are three large intracratonic basins (Vindhyan, Cuddapah and Chattisgarh) and several smaller basins (Kaladgi, Bhima, Pakhal, Penganga, Indravati, Khariar, Sabari and Kolhan) covering a large part of peninsular India. They are not known to host any significant metallic resource...
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Series: Reviews in Economic Geology
Published: 01 January 2008
DOI: 10.5382/Rev.15.11
EISBN: 9781629490229
... ) Stratigraphic units Lithology Meso-Neoproterozoic Kolhan Group Conglomerate, sandstone, limestone, shale Neoarchean-Paleoproterozoic Jagannathpur (∼2.25 Ga), Malangtoli, Dalma, Dhanjori (∼2.8 Ga), Singhbhum Group Mafic-felsic volcanics and metasedimentaries Simlipal volcanics Quartzite, mica...
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Series: Geological Society, London, Memoirs
Published: 01 January 2015
DOI: 10.1144/M43.17
EISBN: 9781862397194
... weathered material as a mantle above the ancient cratonic basement (e.g. as found beneath the Kolhan Group of the Singhbhum–Orissa craton, where a widespread and thick pre-2.0 Ga palaeosol has been identified; Bandopadhyay et al. 2010 ). For the Gulcheru Quartzite, the detritus preserved in all facies...
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Image
Schematic model for iron ore formation in the western Iron Ore <b>Group</b>. (A) H...
Published: 01 March 2008
of the Kolhan Group. Massive magnetite ores should have been martitized along with the formation of soft saprolitic martite-hematite and goethitic ores. However, the effect of Mesoproterozoic weathering is difficult to recognize in the high-grade iron ores currently exploited, as the latter have been affected
Series: Geological Society, London, Special Publications
Published: 01 January 2012
DOI: 10.1144/SP365.2
EISBN: 9781862396135
... tonalitic enclaves that yielded an age of 3651±11 Ma (U–Pb upper intercept age: Ghosh 2004 ) and gneissic enclaves dated at 3509+14/−7 Ma ( Sarkar et al. 1993 ). The TTG gneisses enclose rafts of quartzite–carbonate–pelite and minor BIF. The major BIF-bearing supracrustals occur in the Bailadila Group...
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Image
A. Exposure of pillow basalts in the volcanic unit that constitutes the bas...
Published: 01 March 2008
are found at the base of the Neoproterozoic Kolhan Group where it unconformably overlies the Iron Ore Group and associated iron orebodies.
Journal Article
Journal: Economic Geology
Published: 01 May 2018
Economic Geology (2018) 113 (3): 579-596.
... is around 2.8 Ga ( Roy and Bhattacharya, 2012 ). The youngest stratigraphic unit within the Singhbhum craton is the Kolhan Group, which is believed to be a carbonate platform succession formed in shelf to deep-water conditions ( Mukhopadhyay et al., 2015 ). The quartz-pebble conglomerates...
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Series: Geological Society, London, Memoirs
Published: 01 January 2015
DOI: 10.1144/M43.22
EISBN: 9781862397194
..., the Dhanjori and the Kolhans are grouped together as the Singhbhum Group in Figure 22.2 . The gabbro-anorthosites, comprising the younger Baula–Nuasahi igneous complex, have been dated with ages of c. 3.1 Ga ( Augé et al. 2003 ). The SSZ separates the SCB in the south and the NSMB in the north (Figs 22.1...
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Series: Geological Society, London, Special Publications
Published: 01 January 2012
DOI: 10.1144/SP365.4
EISBN: 9781862396135
... development also. Subsequent major transgressions at about 2.0 Ga deposited littoral–deep-marine deposits above these successions, preserved in the Kolhan Group–Chaibasa Formation association. A long hiatus ensued before deposition of the Dhalbhum and conformably succeeding Dalma formations in Singhbhum...
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Journal Article
Published: 01 June 2006
South African Journal of Geology (2006) 109 (1-2): 6-10.
..., such as the intrusion of the Bushveld Compex and the evolution of the Limpopo Belt. An examination of the litho- and sequence stratigraphy of the poorly studied, but virtually undeformed and unmetamorphosed Meso- to Neoproterozoic Kolhan Group on the Singhbum Craton, India by Joydip Mukhopadhyay et al. reveals...
FIGURES
Series: Geological Society, London, Special Publications
Published: 01 January 2012
DOI: 10.1144/SP365.3
EISBN: 9781862396135
... metasedimentary and metavolcanic rocks ( Mukhopadhyay et al. 1990 ; Blackburn & Srivastava 1994 ), the Kolhan Group ( Ghosh & Chatterjee 1994 ; Saha 1994 ; Mukhopadhyay et al. 2006 ), the Simlipal metavolcanic rocks ( Sarkar & Saha 1962 ; Saha 1994 ) and the Jagannathpur mafic lava ( Sarkar...
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Journal Article
Journal: Geology
Published: 01 October 2014
Geology (2014) 42 (10): 923-926.
... preserved in different parts of the Singhbhum Craton (e.g., Dhanjori, Singhbhum, and Kolhan groups) contain abundant detrital zircons ranging from Neoarchean to Paleoproterozoic or Mesoproterozoic in age ( Acharyya et al., 2010 ; our own U-Pb detrital zircon data from the Kolhan Group). In this respect...
FIGURES
Series: Geological Society, London, Memoirs
Published: 01 January 2015
DOI: 10.1144/M43.23
EISBN: 9781862397194
...-directed thrusting, leading to intermingled tectonic slices of older basement (gneiss and greenstones ( c. 3.6–3.4 Ga), Singhbhum granites ( c. 3.3–3.1 Ga)) and shelf deposits ( Ghosh et al. 2015 and references therein). Ghosh and co-authors also find that the much younger Kolhan Group ( c. 1.6–0.9...
FIGURES
Series: Geological Society, London, Memoirs
Published: 01 January 2015
DOI: 10.1144/M43.3
EISBN: 9781862397194
... as the Kolhan Group (Figs 3.7 & 3.8 ). The age of the Kolhan Group is unconstrained, but Mukhopadhyay et al. (2006) argued that sedimentation probably began at about 1.1 Ga and thus it would correspond to the Purana-II basinal sequences. The Kolhan Group formed in an intracratonic basin...
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Journal Article
Published: 25 May 2010
Geological Magazine (2010) 147 (6): 910-918.
... – Pallahara Gneiss; 3a – Singhbhum Granite Phase I; 4 – Iron Ore Group Lavas; 5 – Iron Ore Group Shales; 7 – Singhbhum Granite Phase III; 8 – Singhbhum Group; 9a – Dhanjori Lavas; 10 – Dalma Lavas; 12 – Kolhan Group; 13 – Mayurbhanj Granite; 14 – Chotanagpur Granite Gneiss; 16 – Alluvium. (b) Structural map...
Journal Article
Published: 09 September 2009
Geological Magazine (2009) 147 (2): 206-218.
... . Depositional environmental history of the Chattisgarh basin, M. P., based on Stromatolites and Microbiota . Journal of Geological Society of India 46 , 359 –68. Mukhopadhyay J. , Ghosh G. & Nandi A. K. 2006 . Depositional setting of the Kolhan Group: its implications...