naa a22 4500 510754937 CHVBK 20180411083119.0 cr unu---uuuuu 180411e20130101xx s 000 0 eng 10.1007/s12594-013-0008-8 doi (NATIONALLICENCE)springer-10.1007/s12594-013-0008-8 Trace elements geochemistry and petrogenesis of basalt from the southern part of the East Pacific Rise [Elektronische Daten] [Sanjay Pandey, Sucharita Pal, J. Shrivastava, G. Roonwal] Trace element geochemistry of basalt samples collected from 6°S-24°S of the southern EPR, representing a super-fast spreading axis is discussed. Trace element data classify these basalts into Normal and Transitional types of MORB, however, LREE enrichment is also observed in few of them. Chondrite normalized REE data plots show highly fractionated nature of these lavas, suggesting their derivation from the primitive mantle source. Petrogenetic modeling of the data suggests variation in the solidus pressure (14-20 kb.) and temperature (1316-1425°C), where 15 to 20% partial melting of the mantle is accountable for the generation of the melt. The pressure and temperature conditions at the beginning of the mantle melting were high along higher latitudes (24°S of EPR), but it gradually lowered down in the lower latitudinal areas (6°S of EPR), supporting for the presence of passively rising upper mantle beneath the Southern EPR. Geological Society of India, 2013 Geochemistry nationallicence Basalt nationallicence East Pacific Rise nationallicence Pandey Sanjay Department of Geology, University of Delhi, 110 007, Delhi, India aut Pal Sucharita Department of Geology, University of Delhi, 110 007, Delhi, India aut Shrivastava J. Department of Geology, University of Delhi, 110 007, Delhi, India aut Roonwal G. Department of Geology, University of Delhi, 110 007, Delhi, India aut Journal of the Geological Society of India Springer-Verlag 81/1(2013-01-01), 91-100 0016-7622 81:1<91 2013 81 12594 https://doi.org/10.1007/s12594-013-0008-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12594-013-0008-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pandey Sanjay Department of Geology, University of Delhi, 110 007, Delhi, India aut NATIONALLICENCE 700 1- Pal Sucharita Department of Geology, University of Delhi, 110 007, Delhi, India aut NATIONALLICENCE 700 1- Shrivastava J. Department of Geology, University of Delhi, 110 007, Delhi, India aut NATIONALLICENCE 700 1- Roonwal G. Department of Geology, University of Delhi, 110 007, Delhi, India aut NATIONALLICENCE 773 0- Journal of the Geological Society of India Springer-Verlag 81/1(2013-01-01), 91-100 0016-7622 81:1<91 2013 81 12594 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer