Geochemical evidence for the volcanic arc tectonic setting of the Dhanjori volcanics, Singhbhum craton, eastern India

Autor:	M. Raza, Shabber H. Alvi
Rok vydání:	1992
Předmět:	geography geography.geographical_feature_category Volcanic arc Subduction Andesite Geochemistry Geology Volcanic rock Craton Continental margin Oceanic crust Island arc Petrology
Zdroj:	Geological Magazine. 129:337-348
ISSN:	1469-5081 0016-7568
DOI:	10.1017/s0016756800019270
Popis:	Geochemical data on the Dhanjori volcanics of the Singhbhum craton indicate that they range from basalt to andesite and show an iron-enrichment trend. Various chemical characteristics suggest that they are differentiated along the trend similar to that of orogenic suites and have a strong affinity with island arc tholeiites. The field relationships as well as other geological information also support this conclusion and indicate their eruption on a thin continental margin. It is inferred that the Dhanjori volcanics were probably erupted as a result of plate convergence in northern Singhbhum with subduction of oceanic crust below the Singhbhum craton.
Databáze:	OpenAIRE
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