SHRIMP zircon and titanite U-Pb ages, Lu-Hf isotope signatures and geochemical constraints for ∼2.56Ga granitic magmatism in Western Dharwar Craton, Southern India: Evidence for short-lived Neoarchean episodic crustal growth?

2014 ◽  
Vol 243 ◽  
pp. 197-220 ◽  
Author(s):  
M. Ram Mohan ◽  
D. Srinivasa Sarma ◽  
Neal J. McNaughton ◽  
Ian R. Fletcher ◽  
Simon A. Wilde ◽  
...  
Keyword(s):  
Dharwar Craton ◽  
Hf Isotope ◽  
Southern India ◽  
Crustal Growth ◽  
Granitic Magmatism ◽  
Geochemical Constraints ◽  
Shrimp Zircon

scholarly journals Horizontal tectonics assembled unrelated crustal blocks in the Paleoarchean

2020 ◽  
Author(s):  
Mudlappa Jayananda ◽  
Martin GUITREAU ◽  
Aadhiseshan Krishnaswami Ravindran ◽  
Sun-Lin Chung ◽  
Takashi Miyazaki
Keyword(s):  
Oceanic Lithosphere ◽  
Dharwar Craton ◽  
Southern India ◽  
Horizontal Motion ◽  
Mantle Plumes ◽  
Crustal Growth ◽  
Vertical Accretion ◽  
Isotopic Age ◽  
Present Evidence ◽  
Oceanic Plateau

Abstract Archean geodynamics and craton formation are topics of much debate for decades. Here we present evidence from field, petrography, geochronology, elements and Nd-Hf isotopes for origin of micro-blocks in different geodynamic environments and their assembly by horizontal tectonics in Paleoarchean. The cratonal core in the western Dharwar craton (southern India) formed through assembly of three genetically unrelated micro-blocks: a microcontinent with oceanic plateau remnants, oceanic arc, and a section of oceanic lithosphere. Isotopic age data of these blocks and surrounding basement gneisses indicate that most of the later is coeval to or younger than the blocks. The assembly three micro-blocks marked by intrusion of hot trondhjemite magmas which drive partial convective crustal overturn, resulting in dome-and-keel structures visible in the Archean cratons. Our study reveals horizontal motion of unrelated tectonic units during Paleoarchean, but mantle plumes driven vertical accretion contributed to major crustal growth allowing geodynamic linkage between Paleoarchean cratons.

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

2012 ◽  
Vol 22 (3-4) ◽  
pp. 843-854 ◽  
Author(s):  
D. Srinivasa Sarma ◽  
N.J. McNaughton ◽  
Elena Belusova ◽  
M. Ram Mohan ◽  
I.R. Fletcher
Keyword(s):  
Detrital Zircon ◽  
Greenstone Belt ◽  
Dharwar Craton ◽  
Hf Isotope ◽  
Crustal Growth ◽  
Isotope Systematics

Lu–Hf isotope evidence for Paleoproterozoic metamorphism and deformation of Archean oceanic crust along the Dharwar Craton margin, southern India

2013 ◽  
Vol 233 ◽  
pp. 206-222 ◽  
Author(s):  
Niels M. Noack ◽  
Reiner Kleinschrodt ◽  
Maria Kirchenbaur ◽  
Raúl O.C. Fonseca ◽  
Carsten Münker
Keyword(s):  
Oceanic Crust ◽  
Dharwar Craton ◽  
Hf Isotope ◽  
Southern India ◽  
Isotope Evidence

scholarly journals Multi-stage crustal growth and Neoarchean geodynamics in the Eastern Dharwar Craton, southern India

2020 ◽  
Vol 78 ◽  
pp. 228-260 ◽  
Author(s):  
M. Jayananda ◽  
K.R. Aadhiseshan ◽  
Monika A. Kusiak ◽  
Simon A. Wilde ◽  
Kowete-u Sekhamo ◽  
...  
Keyword(s):  
Dharwar Craton ◽  
Southern India ◽  
Crustal Growth ◽  
Eastern Dharwar Craton ◽  
Multi Stage
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