Paleo-Mesoarchean crustal growth and reworking in the western Dharwar Craton, southwestern India: Evidence from trondhjemitic gneiss and granitic gneiss

2021 ◽  
Vol 367 ◽  
pp. 106428
Author(s):  
Wenhao Ao ◽  
Mingguo Zhai ◽  
Yan Zhao ◽  
Chengli Zhang ◽  
Yong Sun ◽  
...  
Keyword(s):  
Dharwar Craton ◽  
Crustal Growth ◽  
Granitic Gneiss ◽  
Southwestern India

Meso-Neoarchean magmatism and episodic crustal growth in the Kudremukh-Agumbe granite-greenstone belt, western Dharwar Craton, India

2019 ◽  
Vol 323 ◽  
pp. 16-54 ◽  
Author(s):  
Arijit Pahari ◽  
Li Tang ◽  
C. Manikyamba ◽  
M. Santosh ◽  
K.S.V. Subramanyam ◽  
...  
Keyword(s):  
Greenstone Belt ◽  
Dharwar Craton ◽  
Crustal Growth

Neoarchaean crustal growth by combined arc–plume action: evidence from the Kadiri Greenstone Belt, eastern Dharwar craton, India

2013 ◽  
Vol 389 (1) ◽  
pp. 135-163 ◽  
Author(s):  
Sukanta Dey ◽  
Jinia Nandy ◽  
A. K. Choudhary ◽  
Yongsheng Liu ◽  
Keqing Zong
Keyword(s):  
Greenstone Belt ◽  
Dharwar Craton ◽  
Crustal Growth ◽  
Eastern Dharwar Craton

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.

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