TY - JOUR
T1 - Geochemical characteristics, discrimination and petrogenesis of Neoproterozoic peralkaline granites, Barmer District, SW Rajasthan, India
AU - Maheshwari, Anil
AU - Coltorti, Massimo
AU - Rajput, Sandeep K.
AU - Verma, Mukesh
PY - 2009/12
Y1 - 2009/12
N2 - The Malani Igneous Suite is characterized by discontinuous, ring-shaped outcrops of peralkaline granite associated with minor exposures of volcanic rocks around Barmer town in southwestern Rajasthan, India. These granites are defined as peralkaline, within plate, and A-type based on their bulk rock compositions. The most distinctive geochemical characteristics of these A-type granites are enrichments in Na2O+K2O, Fe/Mg, Zr, Nb, Y, depletions in Al2O3, CaO, Sr, and low-absolute abundances of incompatible trace elements compared to granites from adjoining areas. The igneous activity is considered as a reflection of the 'Pan-African Event'. The correlative mineralogy, chemical characteristics, and tectonic setting of the peralkaline granites from the study area, and comparison with data from adjoining areas, suggest their generation under a common thermal event.
AB - The Malani Igneous Suite is characterized by discontinuous, ring-shaped outcrops of peralkaline granite associated with minor exposures of volcanic rocks around Barmer town in southwestern Rajasthan, India. These granites are defined as peralkaline, within plate, and A-type based on their bulk rock compositions. The most distinctive geochemical characteristics of these A-type granites are enrichments in Na2O+K2O, Fe/Mg, Zr, Nb, Y, depletions in Al2O3, CaO, Sr, and low-absolute abundances of incompatible trace elements compared to granites from adjoining areas. The igneous activity is considered as a reflection of the 'Pan-African Event'. The correlative mineralogy, chemical characteristics, and tectonic setting of the peralkaline granites from the study area, and comparison with data from adjoining areas, suggest their generation under a common thermal event.
KW - Geochemistry
KW - Malani Igneous Suite
KW - Peralkaline granite
KW - Petrogenesis
UR - http://www.scopus.com/inward/record.url?scp=75449097863&partnerID=8YFLogxK
U2 - 10.1080/00206810902895337
DO - 10.1080/00206810902895337
M3 - Article
AN - SCOPUS:75449097863
SN - 0020-6814
VL - 51
SP - 1103
EP - 1120
JO - International Geology Review
JF - International Geology Review
IS - 12
ER -