Pb, Sr and Nd isotope systematics of metavolcanic rocks of the Hutti greenstone belt, Eastern Dharwar craton: Constraints on age, duration of volcanism and evolution of mantle sources during Late Archean

2010 ◽  
Vol 39 (1-2) ◽  
pp. 1-11 ◽  
Author(s):  
R. Anand ◽  
S. Balakrishnan
Keyword(s):  
Greenstone Belt ◽  
Dharwar Craton ◽  
Eastern Dharwar Craton ◽  
Nd Isotope ◽  
Metavolcanic Rocks ◽  
Mantle Sources ◽  
Isotope Systematics

scholarly journals Petrology and Sr-Nd isotope systematics of the Ahobil kimberlite (Pipe-16) from the Wajrakarur field, Eastern Dharwar craton, southern India

2019 ◽  
Vol 10 (3) ◽  
pp. 1167-1186 ◽  
Author(s):  
Abhinay Sharma ◽  
Alok Kumar ◽  
Praveer Pankaj ◽  
Dinesh Pandit ◽  
Ramananda Chakrabarti ◽  
...  
Keyword(s):  
Kimberlite Pipe ◽  
Dharwar Craton ◽  
Southern India ◽  
Eastern Dharwar Craton ◽  
Nd Isotope ◽  
Isotope Systematics

Post-collisional calc-alkaline lamprophyres from the Kadiri greenstone belt: Evidence for the Neoarchean convergence-related evolution of the Eastern Dharwar Craton and its schist belts

Lithos ◽  
2018 ◽  
Vol 320-321 ◽  
pp. 105-117 ◽  
Author(s):  
Ashutosh Pandey ◽  
N.V. Chalapathi Rao ◽  
Ramananda Chakrabarti ◽  
Praveer Pankaj ◽  
Dinesh Pandit ◽  
...  
Keyword(s):  
Greenstone Belt ◽  
Dharwar Craton ◽  
Eastern Dharwar Craton ◽  
Calc Alkaline ◽  
Alkaline Lamprophyres

Isotope evidence for the origin of Andean granites

1988 ◽  
Vol 79 (2-3) ◽  
pp. 123-133 ◽  
Author(s):  
R. J. Pankhurst ◽  
M. J. Hole ◽  
M. Brook
Keyword(s):  
Antarctic Peninsula ◽  
Nd Isotope ◽  
Depleted Mantle ◽  
Wide Range ◽  
Mantle Sources ◽  
Subducted Oceanic Crust ◽  
Isotope Evidence ◽  
The Antarctic ◽  
Isotope Systematics ◽  
Material Input

ABSTRACTThe genesis of subduction-related magmas in the Andean region of South America and the Antarctic Peninsula is considered in relation to the Palaeozoic to Cenozoic granitoids belts which are thought to parallel palaeo-coastlines. Their Sr-Nd isotope systematics show a wide range of initial compositions (87Sr/86Sr0 0·7038 to >0·710; εNd, +4 to –10) requiring material input from both depleted mantle and continental crust. In local transects there are consistent trends with time of emplacement, from enriched (crustal) to depleted (mantle) sources, regardless of the sense of migration of magmatism (towards or away from the continent). These trends represent mixing between mantle-derived material and anatectic melts of the lower crust: in each case the crustal end-member reflects the age and isotopic composition of the local deep crustal basement (Precambrian in the easternmost Andes, Palaeozoic in the W and in the Antarctic Peninsula). The depleted end-member could be derived by melting within the subducted oceanic crust, the overlying mantle or previously crystallised mafic underplating. One of the most important factors controlling the mixing process is the angle of subduction, resulting in magma generation under variable tectonic conditions.

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