000099652 001 __ 99652
000099652 005 __20141121163538.0
000099652 024 8_ $9 driver $9 artpubuab $a oai:ddd.uab.cat:99652
000099652 024 7_ $2 doi $a 10.1344/105.000001759
000099652 035 __ $9 articleid $a 16965728v10n3p283
000099652 041 __ $a eng
000099652 100 __ $a Mishra, M. $u Indira Gandhi National Open University. Presently at School of Sciences
000099652 245 1_ $a Provenance, tectonic setting and source-area weathering of Mesoproterozoic Kaimur Group, Vindhyan Supergroup, Central India
000099652 520 3_ $a The siliciclastic of the Upper Kaimur Group of the Vindhyan Supergroup in Central India have been geochemically studied in order to understand their provenance, paleoweathering conditions and tectonic conditions. A-CN-K (Al2O3-CaO-K2O) ternary diagram and chemical index of alteration (CIA) values suggest that the granitic source rocks underwent moderate to high degree of chemical weathering under moderate weathering conditions for an extended period of time, or under humid weathering for shorter periods of time. Similar CIA values in all textural types indicate that recycling processes homogenized the shale and sandstone compositions. Various geochemical discriminants and elemental ratios such as K2O/Na2O, Al2O3/TiO2, SiO2/MgO, La/Sc, Th/Sc, Zr/Sc, Th/Cr, [Gd/ Yb]N and pronounced negative Eu anomalies indicate the rocks to be the product of post-Archean, Proterozoic granitic source, with minor granodioritic input and substantial sediment recycling. The geochemical signatures corroborate their deposition in a subsiding foreland basin over Bundelkhand craton with provenance from south, south westerly Chotanagpur granite gneiss.
000099652 540 __ $9 info:eu-repo/semantics/openAccess $a Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l’obra i la creació d’obres derivades, fins i tot amb finalitats comercials, sempre i quan aquestes es distribueixin sota la mateixa llicència que regula l’obra original i es reconegui l’autoria de l’obra original. $u http://creativecommons.org/licenses/by-sa/3.0/es/ 61.
000099652 546 __ $a Anglès
000099652 599 __ $a recerca
000099652 653 1_ $a Kaimur Group
000099652 653 1_ $a Vindhyan Supergroup
000099652 653 1_ $a Siliciclastic
000099652 653 1_ $a Geochemistry
000099652 653 1_ $a Proterozoic granite
000099652 653 1_ $a Foreland basin
000099652 655 _4 $a info:eu-repo/semantics/article
000099652 655 _4 $a info:eu-repo/semantics/publishedVersion
000099652 700 __ $a Sen, S. $u Banaras Hindu University. Department of Geology
000099652 773 __ $g Vol. 10, Núm. 3 (setembre 2012), p. 283-293 $t Geologica acta $x 1696-5728
000099652 856 40 $p 13 $s 1069957 $u http://ddd.uab.cat/pub/geoact/geoact_a2012m9v10n3/geoact_a2012m9v10n3p283.pdf
000099652 973 __ $f 0283 $l 293 $m setembre $n 3 $v 10 $x geoact_a2012m9v10n3 $y 2012
000099652 980 __ $a ARTPUB $b GEOACT $b UAB