Geochemical characteristics and petrogenesis of four Palaeoproterozoic mafic dike swarms and associated large igneous provinces from the eastern Dharwar craton, India

Srivastava, Rajesh K.; Samal, Amiya K.; Gautam, Gulab C.

doi:10.1080/00206814.2014.938366

Cited by 42 publications

(27 citation statements)

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“…A good correlation is observed between the Group 3 dyke samples of the present study with the 1.88–1.89 Ga Hampi swarms (see Figures d and d). The Group 2 dyke samples show a good geochemical correlation with the NW–SE to WNW–ESE trending 2.21 Ga Anantapur‐Kunigal swarm (earlier known as Kunigal swarm by Srivastava et al, ; see Figures b and b) and NW–SE to WNW–ESE trending 2.18 Ga Mahbubnagar–Dandeli swarm (earlier known as Mahbubnagar swarm by Srivastava et al, ; see Figures c and c); however, dyke trends of these two swarms are not similar (cf. Samal et al, ; Söderlund et al, ; see Figure ).…”

Section: Discussionmentioning

confidence: 92%

“…Comparison of ME spidergrams between the known Palaeoproterozoic mafic dyke swarms (after Srivastava et al, ; swarm names are used as recommended by Söderlund et al, ) of the EDC and mafic dykes of all the three identified Groups (symbols are the same as in Figure ) [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Discussionmentioning

confidence: 99%

“…However, there is no definite basis to correlate these dykes for their possible genetic connection except that they show similar trends on the Google Earth™ images. Therefore, an attempt has been made to correlate the mafic dykes of the present study with the mafic dykes of the EDC by comparing available geochemical data (Srivastava, Jayananda, Gautam, Gireesh, & Samal, 2014;Srivastava, Samal & Gautam, 2015).…”

Section: Figure 14mentioning

confidence: 99%

“…Many of these mafic magmatic events are chiefly represented today by dykes and dyke swarms of different trends and ages (Ernst & Srivastava, ; Murthy, ; Samal et al, ; Srivastava et al, , and references therein). A number of distinct Palaeoproterozoic mafic dykes are reported to have emplaced within the Dharwar Craton (Dash et al, ; Drury, ; Halls, ; Murthy, ); however, they are more conspicuous in the eastern Dharwar Craton (Chatterjee & Bhattacharji, ; Halls, Kumar, Srinivasan, & Hamilton, ; Radhakrishana, Krishnendu, & Balasubramonian, ; Ernst & Srivastava, ; French & Heaman, ; Piispa et al, ; Srivastava, Samal, & Gautam, ; Samal et al, ; Söderlund et al, , and references therein; see Figure ). The Dharwar Craton is also thought to be an integral part of several ancient supercontinents such as Superia and Sclavia (French & Heaman, ; Nilsson, Klausen, Söderlund, & Ernst, ; Srivastava, Jayananda, Gautam, Gireesh, & Samal, ; Srivastava, Jayananda, Gautam, & Samal, ; Srivastava & Gautam, ), Nuna/Colombia (Belica et al, ), and Rodinia (Ernst, Bleeker, Söderlund, & Kerr, ).…”

Section: Introductionmentioning

confidence: 99%

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Geochemistry, petrogenesis, and geodynamic implications of NE–SW to ENE–WSW trending Palaeoproterozoic mafic dyke swarms from southern region of the western Dharwar Craton

et al. 2019

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A number of NE–SW to ENE–WSW trending Palaeoproterozoic mafic dykes, intruded within the Archean basement rocks and more conspicuous in the southern parts of the western Dharwar Craton (WDC), was studied for their whole‐rock geochemistry to understand their petrogenetic and geodynamic aspects. Observed mineralogical and textural characteristics classify them either as meta‐dolerites or dolerites/olivine‐dolerites. They show basaltic to basaltic–andesitic compositions and bear sub‐alkaline tholeiitic nature. Three geochemically distinct groups of mafic dykes have been identified. Group 1 samples show flat REE patterns (LaN/LuN = ~1), whereas the other two groups have LaN/LuN = ~2–3 (Group 2; enriched LREE and flat HREE patterns) and LaN/LuN = ~4 (Group 3; inclined REE patterns). Chemistry is not straightforward to support any significant role of crustal contamination and probably reflect their source characteristics. However, their derivation from melts originated from a previously modified metasomatized lithospheric mantle due to some ancient subduction event cannot be ignored. Most likely different mantle melts were responsible for derivation of these distinct sets of mafic dykes. The Group 2 dykes are derived from a melt generated within spinel stability field by ~10% batch melting of a lithospheric mantle source, whereas the Group 3 dykes have their derivation from a melt originated within the spinel–garnet transition zone and were fed from slightly higher (~12–15%) batch melting of a similar source. The Group 1 samples were also crystallized from a melt generated at the transition zone of spinel–garnet stability field by higher degrees (~20%) of melting of a primitive mantle source. Geochemistry of the studied samples is typical of Palaeoproterozoic mafic dykes emplaced within the intracratonic setting, reported elsewhere globally as well as neighbouring cratons. Geochemistry of the studied mafic dyke samples is also compared with the mafic dykes of the eastern Dharwar Craton (EDC). Except the Group 3 samples, which have good correlation with the 1.88–1.89 Ga Hampi swarm, no other group shows similarity with the EDC mafic dykes. There is an ample possibility to have some different mafic magmatic events in the WDC, which could be different from the EDC. However, it can only be confirmed after precise age determinations.

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Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Figure 14mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Geochemistry, petrogenesis, and geodynamic implications of NE–SW to ENE–WSW trending Palaeoproterozoic mafic dyke swarms from southern region of the western Dharwar Craton

et al. 2019

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“…The schist belts, regional fabric, and 2400-2100 Ma mafic dikes in the EDC are truncated at the margin of the Cuddapah basin ( Figure 10; French and Heaman 2010; Srivastava et al 2014). The mafic rocks in the lower part of the Cuddapah basin have U-Pb baddeleyite age of 1885 ± 3 Ma (French et al 2004(French et al , 2008, indicating the basin opening at~2000-1900 Ma.…”

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confidence: 97%

Precambrian continent assembly and dispersal events of South Indian and East Antarctic Shields

Mohanty

2015

International Geology Review

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An Archaean continent 'SIWA', an acronym for South India-Western Australia, comprising the Bastar-Dharwar craton, the Yilgarn craton, the Napier Complex, and the Vestfold Hills has been identified from palaeomagnetic and spatio-temporal data. This assembly was dispersed in three phases with the development of the proto-Indian ocean. The first and second events~2350 and~2000 Ma were related to the separation of the Yilgarn craton and the Napier Complex, respectively, to form a proto-Indo-Antarctic ocean and the Cuddapah basin. The proto-ocean was closed~1650 Ma by the collision of the Lambert Terrane of East Antarctica and the Bastar-Dharwar craton. This collision, associated with ultra-high temperature (UHT) granulite facies metamorphism, is identified in the southern domain of the Eastern Ghats and the Oygardens domain of East Antarctica. The third extensional event between 1500 and 1200 Ma was associated with the separation of the Vestfold Hills block and a second phase of opening of the proto-Indian ocean, and the development of a series of basins on the western side of the Eastern Ghats (the Chhatisgarh, Khariar, Ampani, Indravati, and Sabari basins). The closing of this ocean basin during the Eastern Ghats-Rayner orogeny at~950 Ma was related to the amalgamation of India and East Antarctica to form the supercontinent Rodinia. During the Neoproterozoic, this part of Rodinia was involved in orogenic collapse/extension and deposition of the Sodruzhesvo Group. The Pan-African Prydz Bay orogeny at~550 Ma caused the closing of the basin to form East Gondwanaland.

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Geochemical characterization, petrogenesis, and emplacement tectonics of Paleoproterozoic high‐Ti and low‐Ti mafic intrusive rocks from the western Arunachal Himalaya, northeastern India and their possible relation to the ~1.9 Ga LIP event of the Indian shield

Srivastava

Samal

2018

Geological Journal

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Paleoproterozoic mafic intrusive rocks from the western Arunachal Himalaya have been studied for understanding their petrogenesis and tectonic environment, in which they were emplaced, with the help of their bulk-rock major, trace, and rare-earth elements (REE) compositions. These mafic intrusive rocks, mostly small bodies of dykes, sills, and lenses, are exposed in the Higher as well as the Lesser Himalaya sequences. Geochemically, 2 suites of rocks are identified and grouped into high-titanium and low-titanium mafic intrusive rocks. High-titanium mafic intrusive (HTMI) samples have comparatively low Mg number (Mg#) and high high-field strength element contents in comparison to low-titanium mafic intrusive (LTMI) rocks. Multielements and REE patterns for these two identified groups are distinct. The LTMI and HTMI were originally spatially separated at the time of their emplacement and believed that probably they have been juxtaposed during the Himalayan orogeny by crustal shortening through development of imbricated thrusts. It is perceived that the HTMI and LTMI have different petrogenetic histories and are derived from two different melts; however, they are postulated to be parts of the same igneous province. Geochemical characteristics do not support any serious effect of crustal contamination; however, interaction with metasomatized lithospheric mantle cannot be discounted. Trace element petrogenetic modelling suggests derivation of the LTMI samples from a parental magma generated in spinel stability field (thin lithosphere) through a~20-25% melting of a lherzolite mantle source, whereas the HTMI samples were derived from~5-10% melting of a similar mantle source but from garnet stability field (thick lithosphere). Widespread Paleoproterozoic mafic events in the Indian shield such as Bastanar dyke swarm in the Bastar and the Hampi dyke swarm (also includes Pulivendla sills in the Cuddapah Basin) in the eastern Dharwar Craton together with mafic intrusive and extrusive rocks in the Himalayan region suggest presence of a large igneous province at~1.9 Ga.

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Geochemical characteristics and petrogenesis of four Palaeoproterozoic mafic dike swarms and associated large igneous provinces from the eastern Dharwar craton, India

Cited by 42 publications

References 94 publications

Geochemistry, petrogenesis, and geodynamic implications of NE–SW to ENE–WSW trending Palaeoproterozoic mafic dyke swarms from southern region of the western Dharwar Craton

Geochemistry, petrogenesis, and geodynamic implications of NE–SW to ENE–WSW trending Palaeoproterozoic mafic dyke swarms from southern region of the western Dharwar Craton

Precambrian continent assembly and dispersal events of South Indian and East Antarctic Shields

Geochemical characterization, petrogenesis, and emplacement tectonics of Paleoproterozoic high‐Ti and low‐Ti mafic intrusive rocks from the western Arunachal Himalaya, northeastern India and their possible relation to the ~1.9 Ga LIP event of the Indian shield

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