Petrogenesis of the end-Cretaceous diamondiferous Behradih orangeite pipe: implication for mantle plume–lithosphere interaction in the Bastar craton, Central India

Rao, N. V. Chalapathi; Lehmann, Bernd; Mainkar, Datta; Belyatsky, B. V.

doi:10.1007/s00410-010-0559-2

Cited by 66 publications

(18 citation statements)

References 86 publications

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“…Variation of Fo [Mg/(Mg + Fe)] and NiO (wt%) contents in olivine from the kimberlites of this study. Data for other NKF pipes is from Chalapathi Rao et al (), Chalapathi Rao and Dongre (), Behradih orangeite is from Chalapathi Rao et al () and Wajrakarur kimberlites is from Chalapathi Rao et al ().…”

Section: Petrography and Mineral Chemistrymentioning

confidence: 99%

“…( A ) TiO 2 (wt%) vs Al 2 O 3 (wt%) and ( B ) FeO T vs Al 2 O 3 (wt%) of groundmass phlogopite from this study. Data sources: Narayanpet kimberlites and Cuddapah lamproites from Chalapathi Rao et al (); Wajrakarur kimberlites from Chalapathi Rao et al (); Chalapathi Rao and Srivastava () and Chalapathi Rao and Dongre (); Behradih orangeite from Chalapathi Rao et al (); Krishna lamproites from Paul et al () and Chalapathi Rao et al (). Fields of kimberlite, Leucite Hills madupite, West Kimberley and Smoky Butte lamproites are taken from Dawson and Smith (); Gibson et al ().…”

Section: Petrography and Mineral Chemistrymentioning

confidence: 99%

“…( B ) MgO (wt%) vs Al 2 O 3 (wt%) of groundmass spinels of this study. Data for southern African kimberlite spinels are from Scott‐Smith and Skinner (); Wajrakarur kimberlites data are from Chalapathi Rao et al (), Chalapathi Rao and Srivastava (); and data for the Behradih orangeite from Chalapathi Rao et al (). Data for spinel from crater facies Tokapal kimberlite, Central India, is from the unpublished data set of the authors.…”

Section: Petrography and Mineral Chemistrymentioning

confidence: 99%

“…Also shown for comparison are the data for WKF, RKF, Behradih orangeite and other NKF kimberlites. Data sources: Narayanpet kimberlites from Chalapathi Rao et al (); Raichur kimberlites from Chalapathi Rao et al (), Wajrakarur kimberlites from Chalapathi Rao et al (); Chalapathi Rao and Srivastava, (), and Chalapathi Rao and Dongre (); Behradih orangeite from Chalapathi Rao et al (). A positive correlation is displayed between immobile trace elements (in ppm) such as Zr and Hf ( F ), and La and Nb ( H ), but not for mobile elements such as Zr and Ba ( G ).…”

Section: Whole‐rock Geochemistrymentioning

confidence: 99%

“…In this paper, we present comprehensive mineral chemistry data for these occurrences, as well as additional whole‐rock geochemical data. We evaluate the relative contributions of the underlying sub‐continental lithospheric and asthenospheric (convecting) mantle in light of the recent petrogenetic models envisaged for the Wajrakarur and Raichur kimberlite fields from Eastern Dharwar Craton and Mainpur orangeite field, Bastar Craton, Central India (e.g., Paul et al , ; Chalapathi Rao and Srivastava, ; Chalapathi Rao and Dongre, ; Chalapathi Rao et al , 2010a, b; ). We also estimate the oxygen fugacity ( f O 2 ) of the NKF magmas by applying Fe–Nb oxybarometry to their perovskite chemistry and thereby attempt to assess the role of oxidation state in their diamond prospectivity.…”

Section: Introductionmentioning

confidence: 99%

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Origin and diamond prospectivity of Mesoproterozoic kimberlites from the Narayanpet field, Eastern Dharwar Craton, southern India: insights from groundmass mineralogy, bulk‐chemistry and perovskite oxybarometry

2011

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The Mesoproterozoic Narayanpet Kimberlite Field (NKF) is located~200 km north of the well-known Wajrakarur Kimberlite Field (WKF) in the Eastern Dharwar Craton, southern India. Whereas a majority of the WKF occurrences are diamondiferous and contain mantle xenoliths and xenocrysts, their paucity is a characteristic feature of the NKF. This has been attributed alternately to the derivation of NKF magmas from a shallower depth, or to variability in thickness of the Sub-Continental Lithospheric Mantle (SCLM) beneath the Eastern Dharwar Craton. Recently, exploration by De Beers resulted in the discovery of a number of new kimberlite occurrences from the NKF, with some of their geochemical features and radiogenic isotope systematics subsequently becoming available. In this paper, we present detailed petrography, groundmass mineral composition and new bulk-rock geochemistry data for a number of NKF rocks and attempt to further constrain their origin. We also investigate the influence of redox conditions on diamond prospectivity by estimating oxygen fugacity ( f O 2 ) from Fe-Nb oxybarometry on NKF groundmass perovskites. We identify for the first time in the NKF the presence of volcaniclastic (fragmental textured) facies kimberlite belonging to the diatreme portion of the intrusion. Rarity of olivine macrocrysts and the presence of diopside are hallmarks of the NKF kimberlites, in contrast to archetypal kimberlites of southern Africa. Mineral components of the groundmass display features that are characteristic to both archetypal kimberlites and to orangeites, and it is not straight forward to apply conventional mineral-genetic schemes in the nomenclature of the NKF pipes. Low f O 2 of the NKF magma (ΔNNO (nickel-nickel oxide) = −1.9 to −3.2), indistinguishable from that of diamondiferous kimberlites world-wide, indicates that redox conditions were favourable for diamond prospectivity, and that magmatic emplacement could, instead, have played a major role in their low diamond potential.

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Section: Petrography and Mineral Chemistrymentioning

confidence: 99%

Section: Petrography and Mineral Chemistrymentioning

confidence: 99%

Section: Petrography and Mineral Chemistrymentioning

confidence: 99%

Section: Whole‐rock Geochemistrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Origin and diamond prospectivity of Mesoproterozoic kimberlites from the Narayanpet field, Eastern Dharwar Craton, southern India: insights from groundmass mineralogy, bulk‐chemistry and perovskite oxybarometry

2011

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Tectonic framework of southern Bastar Craton, Central India: a study based on different spatial information data sets

2011

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We present here a regional tectonic fabric analysis of the southern margin of the Bastar Craton, Central India, obtained from different spatial data sets that include Shuttle Radar Topographic Mission (SRTM), Landsat ETM + (Enhanced Thematic Mapper) and IRS (Indian Remote sensing Satellite) P6-LISS3, integrated with available geological information, as well as field and microscopic observations. The southern margin of the Bastar Craton exhibits large-scale structures, such as regional-scale folds, major shear zones and associated tectonic fabric affected by strong brittle-ductile deformation. The deformational features are related to large-scale thrusting, regional compression, and episodic igneous activity during the Precambrian, and display a major tectonic control on magmatism and the evolution of a shear zone system. The NW-SE to E-W and NE-SW trending brittle to ductile shear zones traversing the craton display both dextral as well as sinistral displacements. Well-developed kinematic indicators include, sheared quartz veins, tension gashes, rotated porphyroblasts, S-C fabrics, pinch-andswell structures, sigmoidal foliations and riedel fractures that are well preserved in the basement Sukma-Bengpal supracrustals, as well as in the younger granitoids of the Dongargarh Supergroup. Large-scale well-developed NW-SE trending isoclinal folding in the basement gneisses and major folding in mafic intrusions in the south-western margin and tight, upright doubly-plunging large-scale folds in the eastern margins of the craton represent two major tectonic events. These events can be correlated to large-scale thrusts and suggest an initial N-S compression of the craton followed by E-W thrusting at different intervals during the tectonic evolution of the craton. The occurrence of several NW-SE trending mafic dykes parallel to the shear zones indicate that regional-scale tensile stresses were operating during the Proterozoic, associated with a possible continental rift environment in the centre of the craton. The structural pattern obtained, together with the structures mapped with the coherence of remote sensing images, give significant information and an opportunity to reconstruct the timing, style of deformation and its kinematics in the southern part of the Bastar Craton and provide important constraints on the kinematics of the shear zone system and evolution of the craton.

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Singhbhum and Bastar Cratons

Pandey

2020

Society of Earth Scientists Series

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Petrogenesis of the end-Cretaceous diamondiferous Behradih orangeite pipe: implication for mantle plume–lithosphere interaction in the Bastar craton, Central India

Cited by 66 publications

References 86 publications

Origin and diamond prospectivity of Mesoproterozoic kimberlites from the Narayanpet field, Eastern Dharwar Craton, southern India: insights from groundmass mineralogy, bulk‐chemistry and perovskite oxybarometry

Origin and diamond prospectivity of Mesoproterozoic kimberlites from the Narayanpet field, Eastern Dharwar Craton, southern India: insights from groundmass mineralogy, bulk‐chemistry and perovskite oxybarometry

Tectonic framework of southern Bastar Craton, Central India: a study based on different spatial information data sets

Singhbhum and Bastar Cratons

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