Sedimentation pattern and tectonic evolution of the Proterozoic Singhbhum Basin in the eastern Indian shield

Bose, Mihir K.

doi:10.1016/0040-1951(94)90042-6

Cited by 52 publications

(42 citation statements)

References 28 publications

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“…Sandstone compositions vary from arkose to feldspathic arenite to litharenite/lithic wacke depending on relative proportion and dominant species of feldspars and matrix content (cf. Pettijohn, 1975; see also Bose, 1994;Mazumder, 2002).…”

Section: Petrographymentioning

confidence: 96%

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Sedimentation history of the Palaeoproterozoic Dhanjori Formation, Singhbhum, eastern India

Mazumder

Sarkar

2004

Precambrian Research

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The Palaeoproterozoic Dhanjori Formation, eastern India is a terrestrial (dominantly fluvial) volcano-sedimentary succession. Basal conglomerate, coarse-grained sandstone, and shale rests directly on the granite basement and represents the distal fringe of an alluvial fan complex. Sieve, sheet flood, mass flow and alluvial channel and overbank deposits comprise the fan segment. The rest of the formation is entirely constituted by fining upward fluvial cycles. An event of basin tilting and volcanic eruption intervened and resulted a second phase of Dhanjori sedimentation, although the general fluvial depositional framework remained unaltered. The two members of the Dhanjori Formation display different paleocurrent trends related to fluvial response to basin tilting. In the lower member spatial variability in paleocurrent directions occurs as a consequence of fan development. Unlike the first phase, the second phase of fluvial deposition incorporates profuse volcanics and accompanying volcaniclastic deposits. These volcanic and volcaniclastic rocks might have locally blocked the river courses resulting in short-lived lacustrine deposition. Composition of the volcanics varies upward from ultramafic to mafic. The Dhanjori volcanism took place in an intracontinental rift setting as is evident from the interbedded terrestrial deposits. Interbedded volcanic and volcaniclastic rocks in different stratigraphic levels suggest episodic volcanic eruption. A semiarid paleoclimate is proposed and is consistent with development of an alluvial fan comprised of coarse clastic deposits.

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Section: Petrographymentioning

confidence: 96%

“…Mukhopadhaya (1976), Bose (1994), Mazumder et al (2000), and Mazumder (2003) have presented evidence for a continuous depositional history and normal order of superposition between the Dhanjori and Chaibasa formations.…”

Section: Geological Backgroundmentioning

confidence: 99%

Sedimentation history of the Palaeoproterozoic Dhanjori Formation, Singhbhum, eastern India

Mazumder

Sarkar

2004

Precambrian Research

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“…Sandstone compositions vary from arkose to feldspathic arenite to lithic arenite/wacke, depending on relative proportion and dominant species of feldspar (cf. Pettijohn, 1975;Bose, 1994;Mazumder and Sarkar, 2004). Mazumder and Sarkar (2004) for details.…”

Section: Dhanjori Formationmentioning

confidence: 99%

Geochemical and Sm–Nd isotopic characteristics of the Late Archaean-Palaeoproterozoic Dhanjori and Chaibasa metasedimentary rocks, Singhbhum craton, E. India: Implications for provenance, and contemporary basin tectonics

Mazumder

Ohta

et al. 2015

Precambrian Research

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a b s t r a c tIn significant contrast to other cratonic blocks of India, the Singhbhum cratonic successions record continuous depositional record from the Palaeoarchaean to Mesoproterozoic. Although the sedimentary facies characteristics and mode of stratigraphic sequence building of the Dhanjori and Chaibasa Formations are well known, sedimentary geochemistry, provenance and tectonic milieu of deposition of these two formations are hitherto unknown. The current manuscript presents geochemical and Sm-Nd isotopic data from the Dhanjori and Chaibasa Formations for the first time and combine previous sedimentological data with the goal to expand the framework for understanding the depositional and tectonic setting of these two formations. The Sm-Nd isotopic data for the Chaibasa clastics is unambiguous with respect to provenance. Average ε Nd (t = 2.2 Ga) = −0.8 ± 1.0 and average Nd model age (TDM) = 2.51 ± 0.08 Ga with average 147 Sm/ 144 Nd ratios = 0.1114 ± 0.0041 for phyllites and quartzites indicate an extremely homogeneous source signature consistent with a late Archaean "juvenile" crustal provenance, possibly a dominantly upper crustal provenance. The Sm-Nd isotopic data from the older Dhanjori Formation also indicate broadly similar provenance as comparable lithologies in the younger Chaibasa Formation. Our Sm-Nd isotopic data is entirely consistent with the previous sedimentological data and confirms a terrestrial, riftdominated tectonic setting for the Dhanjori Formation (proximal sources, poorly mixed provenance) and a marginal marine to offshore setting for the more homogeneous Nd isotopic signature of the Chaibasa Formation (distal sources, well mixed provenance).

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“…In the northern fringe of the Singhbhum nucleus there is a Proterozoic Singhbhum basin (PSB) which shows characteristic bimodal volcanic geochemistry (shown in the mid-basinal Dalma volcanic belt) and related tectono-sedimentary features of Archean greenstone belts (Bose and Chakraborty, 1992;Bose et al, 1989;Condie, 1990;Bose, 2000). Reconstruction of the paleo-tectonic setting (Chakraborty and Bose, 1985) suggests that PSB is a rifted continental margin generated in an extensional tectonic regime (Bose, 1994). The PSB sediments testify dual (granitic basement and basic volcanic) provenances in the mixed lithological package (Bose, 1994) usually observed in many Proterozoic marginal basins formed in a back-arc setting (Smith, 1992).…”

Section: Introductionmentioning

confidence: 92%

“…Reconstruction of the paleo-tectonic setting (Chakraborty and Bose, 1985) suggests that PSB is a rifted continental margin generated in an extensional tectonic regime (Bose, 1994). The PSB sediments testify dual (granitic basement and basic volcanic) provenances in the mixed lithological package (Bose, 1994) usually observed in many Proterozoic marginal basins formed in a back-arc setting (Smith, 1992). According to (Condie, 2001), komatiites and MORBs possibly represent a Neoproterozoic plume-fed slab captured into an arc, as also suggested by the presence of boninites in the Dalma volcanic rocks (Naqvi, 2005).…”

Section: Introductionmentioning

confidence: 92%

Newer Dolerite dykes, Jharkhand, India: a case study of magma generation, differentiation and metasomatism in a subduction zone setting

Sengupta

Ray

2012

Geochem. J.

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belong to different generations (Saha et al., 1973). The geochemical characters of these dykes are strikingly uniform over a long period of time (Bose, 2008;Mallick and Sarkar, 1994). Bose (2008) suggested that Newer Dolerite dykes generated through partial melting of subcontinental mantle which in turn was metasomatised. Mir et al. (2010) documented geochemical characteristics of these dykes similar to those of back arc extension basalts (BABB). In the studied area shear fractures which appears to act as pathways of these mafic intrusives have two dominant trends NE-SW and E-W and a subsidiary NW-SE trends. This might suggest that stress system have not an uniform direction over a long period, but it changed orientation with time. The geochemical classification of these dykes and their linking to possible tectonic settings have not yet been reported by earlier workers. In the present work, attempts have been made to classify these dykes according to their trace and REE composition. The genesis of different chemical types of Newer Dolerite dykes has been discussed in the perspective of possible tectonic setting. GEOLOGICAL SETTINGThere is a prevalent idea to consider the Singhbhum craton as a "greenstone granite terrain" (Mahadevan, The NE-SW, NW-SE and E-W trending Proterozoic Newer Dolerite dykes around Chaibasa, Jharkhand, India are found to intrude Singhbhum Granites of late Archean age. Clouded plagioclase, bastitised orthopyroxene and uralitized clinopyroxene, magnetite-ilmenite, quartz-feldspar granophyric intergrowth are the characteristic minerals present in the dolerite dykes which assign a low grade metamorphosed character to the dolerite. Both olivine normative and quartz normative varieties are observed in this suite of dykes. These dolerites have been classified into two groups on the basis of REE distribution patterns: one with LREE (Light Rare Earth Element) enriched pattern (Group I) and the other with flat REE pattern (Group II). A significant positive correlation among trace elements Nb, Zr, La, Ce for Group I dykes suggest variable degree of partial melting of the mantle source. In tectonic discrimination diagrams made with immobile incompatible trace elements Nb, Zr, Ti and Y, Group I dykes show arc-like geochemical signature while Group II dykes are similar to MORBs. Enrichment in some of the LILE and prominent depletion in Nb, P and Ti in Group I dykes suggest that the original melt was derived from a metasomatised mantle source. Group II dykes might derived from a MORB-type mantle source. Melting was triggered by volatiles in case of dykes of Group I while for the Group II dykes, melting was produced by thinning of the lithosphere and subsequent decompression.

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Sedimentation pattern and tectonic evolution of the Proterozoic Singhbhum Basin in the eastern Indian shield

Cited by 52 publications

References 28 publications

Sedimentation history of the Palaeoproterozoic Dhanjori Formation, Singhbhum, eastern India

Sedimentation history of the Palaeoproterozoic Dhanjori Formation, Singhbhum, eastern India

Geochemical and Sm–Nd isotopic characteristics of the Late Archaean-Palaeoproterozoic Dhanjori and Chaibasa metasedimentary rocks, Singhbhum craton, E. India: Implications for provenance, and contemporary basin tectonics

Newer Dolerite dykes, Jharkhand, India: a case study of magma generation, differentiation and metasomatism in a subduction zone setting

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