Detrital zircon U–Pb ages and Hf-isotope systematics from the Gadag Greenstone Belt: Archean crustal growth in the western Dharwar Craton, India

Sarma, D. Srinivasa; McNaughton, Neal J.; Belusova, Elena; Mohan, M. Ram; Fletcher, Ian R.

doi:10.1016/j.gr.2012.04.001

Cited by 104 publications

(52 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(3) Protoliths for the formation of the PGC are thought to have been deeper-sourced intrusions from beneath the plateau remnants, at ca. 3.35 Ga (references in Sarma et al 2012 give 3.36-2.7 Ga). Formation of the Peninsular Gneiss basement was thus essentially contemporaneous with evolution of the ultramafic plateau complexes of the lower Sargur Group.…”

Section: Western Dharwar Cratonmentioning

confidence: 99%

“…From the area of the Gadag greenstone belt in the north of the WDC, there is evidence for 3.6 Ga protocrust and a major crustal growth episode (i.e., the Pen-insular Gneiss complex, PGC) at ca. 3.36 Ga (Sarma et al 2012 and references therein). (2) Circa 50 megayear after ocean plateau formation, subduction complexes are postulated to have formed as accretion occurred, forming the upper Sargur Group felsic to mafic sequences.…”

Section: Western Dharwar Cratonmentioning

confidence: 99%

“…Within the Gadag greenstone belt, which is the northern extension of the Chitradurga belt, late kinematic basinal sediments contain detrital zircons <2547 ± 5 Ma, and the age of the underlying greenstone volcanics is 2588 ± 10 Ma, while later Au mineralization dates at 2522 ±6Ma (Sarma et al 2012). Between the late kinematic sedimentation and Au mineralization, the terrane was deformed, metamorphosed, and uplifted.…”

Section: Western Dharwar Cratonmentioning

confidence: 99%

“…Isolated granites of 2600 Ma intrude both Dharwar Supergroup and peninsular gneisses; calc-alkaline to highpotassic granitoids intruded at 2.6-2.5 Ga (Sarma et al 2012 and references therein). It is noted by Hokada et al (2013) that both parts of the Chitradurga Group (successions 2 and 3 discussed earlier in the text) were metamorphosed together at ca.…”

Section: Western Dharwar Cratonmentioning

confidence: 99%

See 3 more Smart Citations

A review of the inferred geodynamic evolution of the Dharwar craton over the ca. 3.5–2.5 Ga period, and possible implications for global tectonics

et al. 2014

View full text Add to dashboard Cite

Abstract:The geological history and evolution of the Dharwar craton from ca. 3.5-2.5 Ga is reviewed and briefly compared with a second craton, Kaapvaal, to allow some speculation on the nature of global tectonic regimes in this period. The Dharwar craton is divided into western (WDC) and eastern (EDC) parts (separated possibly by the Closepet Granite Batholith), based on lithologi-cal differences and inferred metamorphic and magmatic genetic events. A tentative evolution of the WDC encompasses an early, ca. 3.5 Ga protocrust possibly forming the basement to the ca. 3.35-3.2 Ga Sargur Group greenstone belts. The latter are interpreted as having formed through accretion of plume-related ocean plateaux. The approximately coeval Peninsular Gneiss Complex (PGC) was possibly sourced from beneath plateau remnants, and resulted in high-grade metamorphism of Sargur Group belts at ca. 3.13-2.96 Ga. At about 2.9-2.6 Ga, the Dharwar Supergroup formed, comprising lower Bababudan (largely braided fluvial and subaerial volcanic deposits) and upper Chitradurga (marine mixed clastic and chemical sedimentary rocks and subaqueous volcanics) groups. This supergroup is preserved in younger greenstone belts with two distinct magmatic events, at 2.7-2.6 and 2.58-2.54 Ga, the latter approximately coincident with ca. 2.6-2.5 Ga granitic magmatism which essentially completed cratonization in the WDC. The EDC comprises 2.7-2.55 Ga tonalite-trondhjemitegranodiorite (TTG) gneisses and migmatites, approximately coeval greenstone belts (dominated by volcanic lithologies), with minor inferred remnants of ca. 3.38-3.0 Ga crust, and voluminous 2.56-2.5 Ga granitoid intrusions (including the Closepet Batholith). An east-to-west accretion of EDC island arcs (or of an assembled arc -granitic terrane) onto the WDC is debated, with a postulate that the Closepet Granite accreted earlier onto the WDC as part of a "central Dharwar" terrane. A final voluminous granitic cratonization event is envisaged to have affected the entire, assembled Dharwar craton at ca. 2.5 Ga. When Dharwar evolution is compared with that of Kaapvaal, while possibly global magmatic events and freeboard-eustatic changes at ca. 2.7-2.5 Ga may be identified on both, the much earlier cratonization (by ca. 3.1 Ga) of Kaapvaal contrasts strongly with the ca. 2.5 Ga stabilization of Dharwar. From comparing only two cratons, it appears that genetic and chronologic relationships between mantle thermal and plate tectonic processes were complex on the Archaean Earth. The sizes of the Kaapvaal and Dharwar cratons might have been too limited yet to support effective thermal blanketing and thus accommodate Wilson Cycle onset. However, tectonically driven accretion and amalgamation appear to have predominated on both evolving cratons.Résumé : L'histoire géologique et l'évolution du craton de Dharwar (ϳ3,5-2,5 Ga) sont examinées et sommairement comparées a` celles d'un second craton, celui de Kaapvaal, afin de permettre une certaine spéculation sur la nature des régimes tectoniques globaux duran...

show abstract

Section: Western Dharwar Cratonmentioning

confidence: 99%

Section: Western Dharwar Cratonmentioning

confidence: 99%

Section: Western Dharwar Cratonmentioning

confidence: 99%

Section: Western Dharwar Cratonmentioning

confidence: 99%

See 2 more Smart Citations

A review of the inferred geodynamic evolution of the Dharwar craton over the ca. 3.5–2.5 Ga period, and possible implications for global tectonics

et al. 2014

View full text Add to dashboard Cite

show abstract

“…The TTG and associated Sargur Group greenstone sequences form a basement for the younger 2.91-2.67 Ga Dharwar Supergroup greenstone sequences forming the Bababudan-Chitradurga and ShimogaDharwar basins (Kumar et al 1996;Nutman et al 1996;Trendall et al 1997;Jayananda et al 2013b;Manikyamba et al 2014aManikyamba et al , 2014b. Several late 2.62-2.60 Ga potassic plutons intrude the basement, as well as greenstone sequences forming the terminal magmatic event and reworking corresponding to cratonization of Archaean crust in the western Dharwar craton (Bhaskar Rao et al 1992;Jayananda et al 2006Jayananda et al , 2015Chadwick et al 2007;Sarma et al 2012;Ram Mohan et al 2014). On the other hand, the eastern block comprises large remnants/discontinuous exposures of 3.23-3.0 Ga migmatitic TTG with interlayered high-grade supracrustal rocks (quartzite-pelite-calc-silicate-manganiferous marble-BIFs), abundant 2.7-2.54 Ga tonalitic to granodioritic gneisses, 2.5-2.54 Ga volcanic dominated greenstone sequences, and highly voluminous 2.56-2.52 Ga calc-alkaline to potassic plutons (Balakrishnan and Rajamani 1987;Balakrishnan et al 1990Balakrishnan et al , 1999Peucat et al 1993Peucat et al , 2013Jayananda et al 1995Jayananda et al , 2000Jayananda et al , 2013aJayananda et al , 2013bChadwick et al 2000;Chardon et al 2002Chardon et al , 2011Anand and Balakrishnan 2010;Bidyananda et al 2011;Manikyamba and Kerrich 2012).…”

Section: Regional Geological Frameworkmentioning

confidence: 99%

Physical volcanology and geochemistry of Palaeoarchaean komatiite lava flows from the western Dharwar craton, southern India: implications for Archaean mantle evolution and crustal growth

Jayananda

Duraiswami

Aadhiseshan

et al. 2016

International Geology Review

View full text Add to dashboard Cite

Palaeoarchaean (3.38-3.35 Ga) komatiites from the Jayachamaraja Pura (J.C. Pura) and Banasandra greenstone belts of the western Dharwar craton, southern India were erupted as submarine lava flows. These high-temperature (1450-1550°C), low-viscosity lavas produced thick, massive, polygonal jointed sheet flows with sporadic flow top breccias. Thick olivine cumulate zones within differentiated komatiites suggest channel/conduit facies. Compound, undifferentiated flow fields developed marginal-lobate thin flows with several spinifex-textured lobes. Individual lobes experienced two distinct vesiculation episodes and grew by inflation. Occasionally komatiite flows form pillows and quench fragmented hyaloclastites. J.C. Pura komatiite lavas represent massive coherent facies with minor channel facies, whilst the Bansandra komatiites correspond to compound flow fields interspersed with pillow facies. The komatiites are metamorphosed to greenschist facies and consist of serpentine-talc ± carbonate, actinolite-tremolite with remnants of primary olivine, chromite, and pyroxene. The majority of the studied samples are komatiites (22.46-42.41 wt.% MgO) whilst a few are komatiitic basalts (12.94-16.18 wt.% MgO) extending into basaltic (7.71 -10.80 wt.% MgO) composition. The studied komatiites are Al-depleted Barberton type whilst komatiite basalts belong to the Al-undepleted Munro type. Trace element data suggest variable fractionation of garnet, olivine, pyroxene, and chromite. Incompatible element ratios (Nb/Th, Nb/U, Zr/Y Nb/Y) show that the komatiites were derived from heterogeneous sources ranging from depleted to primitive mantle. CaO/Al 2 O 3 and (Gd/Yb) N ratios show that the Al-depleted komatiite magmas were generated at great depth (350-400 km) by 40-50% partial melting of deep mantle with or without garnet (majorite?) in residue whilst komatiite basalts and basalts were generated at shallow depth in an ascending plume. The widespread Palaeoarchaean deep depleted mantle-derived komatiite volcanism and sub-contemporaneous TTG accretion implies a major earlier episode of mantle differentiation and crustal growth during ca. 3.6-3.8 Ga.ARTICLE HISTORY

show abstract

Crustal reworking in the North China Craton at ~2.5 Ga: evidence from zircon U–Pb age, Hf isotope and whole rock geochemistry of the felsic volcano‐sedimentary rocks from the western Shandong Province

et al. 2013

View full text Add to dashboard Cite

The western Shandong Province (WSP) is one of the typical Neoarchaean granite–greenstone belts in the Eastern Block of the North China Craton (NCC) and is an important region to investigate the early Precambrian evolutionary history of the NCC. The Taishan association, consisting of a ~2.7 Ga komatiite–tholeiite sequence and a ~2.5 Ga felsic volcano‐sedimentary sequence, is the major lithological assemblage in the WSP. In the Qixingtai area, the felsic volcano‐sedimentary sequence, partly subjected to anatexis, is composed of hornblende gneiss, voluminous fine‐grained biotite gneiss and biotite plagioclase gneiss. SHRIMP zircon dating shows that the protolith of the biotite plagioclase gneiss formed after ca. 2.53 Ga. The tonalite intrusion into the volcanic protoliths of the fine‐grained biotite gneiss and biotite plagioclase gneiss occurred at 2.52 Ga. Our age data constrain the time of formation of the felsic volcano‐sedimentary sequence in the Taishan area as 2.53–2.52 Ga. The majority of zircons from the felsic volcano‐sedimentary rocks have intermediate εHf(t) values (−1.2 to +2.1). The whole rock Nd isotopes of the Taishan felsic volcano‐sedimentary rocks yield the εNd(t = 2522 Ma) values of +2.6 to −1.8 and TDM2 ages 3.03–2.68 Ga. These values indicate the pre‐existing crust was reworked at the end of the Neoarchaean (~2.5 Ga). The Taishan felsic volcano‐sedimentary rocks are rhyodacite–dacite and andesite in composition. These rocks and the tonalite display similar high SiO2 (65–72 wt.%) and low MgO (1–2 wt.%) content. In contrast, the minor andesites in the area have lower SiO2 (61–62 wt.%) and higher MgO (5.3–6.3 wt.%), suggesting more mantle contribution during their petrogenesis. However, the Mg‐rich andesites have identical rare earth element and multi‐element patterns with the rhyodacite–dacites and distinguish them from the Taishan sanukitoids. We suggest that the 2.53–2.52 Ga felsic volcanics of the Taishan association are the products of partial melting of a subducted oceanic crust. The andesites were produced by minor modification of the ascending tonalite–trondhjemite–granodiorite‐type magma by the mantle wedge. Our study indicates that (1) the tectonic regime of the WSP greenstone belt was dominated by an arc‐subduction system at ~2.52 Ga and (2) the 2.53–2.52 Ga felsic volcano‐sedimentary rocks and intrusive tonalite are the products of crustal reworking. The felsic volcano‐sedimentary sequence of the Taishan association and other ~2.5 Ga arc‐like assemblages in the NCC provide important clues to understand the nature of the tectonothermal events at the end of the Neoarchaean. Copyright © 2013 John Wiley & Sons, Ltd.

show abstract

Detrital zircon U–Pb ages and Hf-isotope systematics from the Gadag Greenstone Belt: Archean crustal growth in the western Dharwar Craton, India

Cited by 104 publications

References 57 publications

A review of the inferred geodynamic evolution of the Dharwar craton over the ca. 3.5–2.5 Ga period, and possible implications for global tectonics

A review of the inferred geodynamic evolution of the Dharwar craton over the ca. 3.5–2.5 Ga period, and possible implications for global tectonics

Physical volcanology and geochemistry of Palaeoarchaean komatiite lava flows from the western Dharwar craton, southern India: implications for Archaean mantle evolution and crustal growth

Crustal reworking in the North China Craton at ~2.5 Ga: evidence from zircon U–Pb age, Hf isotope and whole rock geochemistry of the felsic volcano‐sedimentary rocks from the western Shandong Province

Contact Info

Product

Resources

About